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USRE43286E1 - Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl - Google Patents

Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl Download PDF

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USRE43286E1
USRE43286E1 US10301491 US30149102A USRE43286E1 US RE43286 E1 USRE43286 E1 US RE43286E1 US 10301491 US10301491 US 10301491 US 30149102 A US30149102 A US 30149102A US RE43286 E1 USRE43286 E1 US RE43286E1
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wheel
ratchet
teeth
arcuate
concave
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US10301491
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Bobby Hu
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Hu Bobby
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Bobby Hu
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/46Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel

Abstract

A ratchet wheel includes an inner periphery and an outer periphery. The outer periphery includes a number of arcuate concave teeth each having two sides and an intersection of the two sides. The ratchet wheel includes a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions, thereby forming asymmetric arcuate concave teeth to provide improved structural strength and improved torque. In another embodiment, the concave teeth are non-arcuate to reduce the formation time for the teeth, thereby reducing the production cost.

Description

REFERENCE TO RELATED APPLICATIONS

This application is a reissue application of U.S. Pat. No. 6,148,695, issued Nov. 21, 2000, and filed on Aug. 3, 1999, with application Ser. No. 09/365,738.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth. The present invention also relates to a ratcheting tool, e.g., a ring spanner having a box end in which the ratchet wheel is mounted. The ratchet wheel with asymmetric arcuate concave teeth provides improved structural strength and improved torque. The ratchet wheel with non-arcuate concave teeth is easy to form and thus reduces the production cost.

2. Description of the Related Art

A wide variety of spanners and wrenches have heretofore been provided. Ring spanners are the best choice for driving fasteners (e.g., nuts, bolt heads, etc etc.) in a limited space that is uneasy not easy to access and where it is difficult to operate all kinds of ratcheting tools. Nevertheless, conventional ring spanners have low driving torque. Ratchet type ring spanners have been proposed to solve this problem. A ratchet wheel is mounted in the box end of a ring spanner for driving fasteners at high torque. It is, however, found that, the structural strength of the ratchet wheel is weak, as an outer periphery of the ratchet wheel is processed to form a plurality of arcuate concave teeth with a considerable depth.

FIGS. 11 through 13 of the drawings illustrate a conventional ratchet wheel 1 mounted in a box end (not shown) of a ring spanner (not shown) and having an inner periphery 4 for driving a fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 3. Referring to FIG. 12, each arcuate concave tooth 3 is formed by means of feeding a cutter 2 along a direction transverse to a radial direction (see line OR). The resultant concave tooth 3 has a depth “d” and two sides that intersect at point “R”. The line OR divides the angle a defined by the two sides of the arcuate concave tooth 3 into two equal portions (usually 45° for each portion). As illustrated in FIG. 12, each arcuate concave tooth 3 is machined to have a considerable depth “d” that adversely affects the structural strength of the ratchet wheel 1, as the remaining wall thickness “t” of the ratchet wheel 1 is relatively small. As a result, the driving torque provided by the ratchet wheel for driving the fastener is limited.

FIGS. 14 through 16 of the drawings illustrate a conventional ratchet wheel 5 mounted in a box end 9a (FIG. 17) of a ring spanner 9 (FIG. 17) and having an inner periphery 8 for driving a fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 6. Referring to FIG. 15, each arcuate concave tooth 6 is formed by means of feeding a cutter 7 along a radial direction. The resultant arcuate concave tooth 6 has a depth “d” and two sides that intersect at point “R”. The line OR divides the angle β defined by the two sides of the concave tooth 6 into two equal portions (usually 45° for each portion). As illustrated in FIG. 15, each arcuate concave tooth 6 is machined to have a considerable depth “d” that adversely affects the structural strength of the ratchet wheel, as the remaining wall thickness “t” of the ratchet wheel 5 is relatively small. As a result, the driving torque provided by the ratchet wheel for driving the fastener is limited. Such structure has been disclosed in U.S. Pat. No. 5,533,427 to Chow issued on Jul. 9, 1996, which is incorporated herein for reference. A further drawback of this conventional ratchet wheel is the low production rate for forming the arcuate concave teeth by cutting.

The present invention is intended to provide an improved ratchet wheel that mitigates and/or obviates the above problems.

SUMMARY OF THE INVENTION

It is a primary object of the present invention to provide an improved ratchet wheel has having asymmetric arcuate concave teeth for providing improved structural strength and improved torque.

It is another object of the present invention to provide an improved ratchet wheel that has non-arcuate concave teeth to allow higher production rate rates, as the non-arcuate concave teeth can be formed by means of roll squeezing method, investment casting, or molding. The non-arcuate concave teeth may be symmetric or asymmetric. The ratchet wheel with non-arcuate concave teeth may bear higher torque during ratcheting (i.e., tightening or loosening a fastener).

The present invention also provides a ratcheting tool, e.g., a spanner, equipped with a ratchet wheel in accordance with the present invention. In an embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with asymmetric arcuate concave teeth. In another embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with non-arcuate asymmetric concave teeth. In a further embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with non-arcuate symmetric concave teeth.

Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a ratchet wheel with asymmetric arcuate concave teeth in accordance with the present invention;

FIG. 2 is a side view of the ratchet wheel in accordance with the present invention;

FIG. 3 is a top view of the ratchet wheel in accordance with the present invention, illustrating formation of asymmetric arcuate concave teeth in an outer periphery of the ratchet wheel;

FIG. 4 is a top view of a box end of a ring spanner equipped with the ratchet wheel in accordance with the present invention;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a top view, in an enlarged scale, of the ratchet wheel in accordance with the present invention, wherein the position of symmetric concave teeth formed according to the prior art is illustrated to show difference therebetween;

FIG. 7a is a perspective view of a pawl for cooperating with the asymmetric arcuate concave teeth of the ratchet wheel in accordance with the present invention;

FIG. 7b is a top view of the pawl in FIG. 7a;

FIG. 7c is a side view of the pawl in FIG. 7a;

FIG. 8a is a perspective view of a conventional pawl for cooperating with the arcuate concave teeth of the ratchet wheel in FIG. 14;

FIG. 8b is a top view of the pawl in FIG. 8a;

FIG. 8c is a side view of the pawl in FIG. 8a;

FIG. 9 is an enlarged fragmentary view illustrating operation of the pawl and the asymmetric arcuate concave teeth of the ratchet wheel in accordance with the present invention;

FIG. 10 is a schematic force diagram of the asymmetric arcuate concave tooth of the ratchet wheel in accordance with the present invention;

FIG. 11 is a perspective view of a ratchet wheel according to the prior art;

FIG. 12 is a top view of the ratchet wheel in FIG. 11;

FIG. 13 is a side view of the ratchet wheel in FIG 11;

FIG. 14 is a perspective view of another ratchet wheel according to the prior art;

FIG. 15 is a top view of the ratchet wheel in FIG. 14;

FIG. 16 is a side view of the ratchet wheel in FIG. 14;

FIG. 17 is a top view of a box end of a ring spanner equipped with the ratchet wheel in FIG. 14;

FIG. 18 is an enlarged fragmentary view illustrating operation of the conventional pawl and the symmetric arcuate concave teeth of the conventional ratchet wheel in the ring spanner in FIG. 17;

FIG. 19 is a schematic force diagram of the ratchet wheel in FIG. 14;

FIG. 20 is a sectional view taken along line 20-20 in FIG. 17;

FIG. 21 is a perspective view of a ratchet wheel with non-arcuate concave teeth in accordance with the present invention.

FIG. 22 is a side view of the ratchet wheel in FIG. 21;

FIG. 23 is a top view of a box end of a ring spanner equipped with the ratchet wheel in FIG. 21;

FIG. 24 is a sectional view taken along line 24-24 in FIG. 23;

FIG. 25 is a top view of the ratchet wheel in FIG. 21, wherein the position of symmetric concave teeth formed according to the prior art is illustrated to show difference therebetween;

FIG. 26a is a perspective view of a pawl for cooperating with the non-arcuate concave teeth of the ratchet wheel in FIG. 23;

FIG. 26b is a lop view of the pawl in FIG. 26a; and

FIG. 26c is a side view of the pawl in FIG. 26a.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1 through 9 and initially to FIGS. 1 through 3, a ratchet wheel 20 in accordance with the present invention generally includes first and second axial ends 21a and 21b, an inner periphery 24 for driving a fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 22. The plurality of concave teeth 22 have an axial extent less than that between the axial ends 21a and 21b. The plurality of concave teeth 22 are axially spaced from the axial ends 21a and 21b to define first and second axially spaced portions 23a and 23b. The first axially spaced portion 23a includes a radially extending annular recess. Each arcuate tooth 22 is defined by two sides, with an intersection of radially outer linear edges 22b of teeth 22 being arcuate in shape in a direction parallel to the outer periphery.

Referring to FIG. 3, each arcuate concave tooth 22 is formed by means of feeding a cutter 26 along a direction transverse to a radial direction (see line OR). The resultant concave tooth 22 has a radial depth “d1” and two sides RA and RB that intersect at point “R”. The line OR divides the angle θ defined by the two sides RA and RB of the concave tooth 22 into two unequal portions (e.g., 30° and 60°, 40° and 50°, etc etc.). Namely, every concave tooth 22 thus formed is “asymmetric”, or the two sides for each teeth concave tooth 22 is not equal, which is the most important feature of this embodiment of the present invention. As illustrated in FIG. 3, each concave tooth 22 is machined to have a depth “d1” that will not adversely affect the structural strength of the ratchet wheel, as the remaining wall thickness “t1” of the ratchel wheel 20 is still relatively large. As a result, the ratchet wheel 20 may bear a relatively large driving torque for driving the fastener.

DifferenceThe difference in the depth of the concave tooth 22 of the ratchet wheel 20 of the present invention and the depth of the concave tooth 6 of the conventional ratchet wheel 5 (FIG. 14) is illustrated in FIG. 6. Namely, the remaining narrowest wall thickness “t1” of the ratchet wheel 20 of the present invention is greater than the remaining wall thickness “t” of the conventional ratchet wheel 5 that has the same size as the ratchet wheel 20. Referring to FIGS. 4 and 17, the narrowest wall thickness (t1=1.01 mm in FIG. 4 for a ratchet wheel having an outer diameter of 25.76 mm) of the ratchet wheel 20 of the present invention is almost twice as the narrowest wall thickness (t=0.51 mm in FIG. 17 for a ratchet wheel having an outer diameter of 25.76 mm) of the conventional ratchet wheel 5. Thus, the structural strength and the driving torque of the ratchet wheel of the present invention are both improved.

Referring to FIG. 4, the ratchet wind 20 in accordance with the present invention is rotatably mounted in a box end 38 of a ring spanner 40. A web area 39 between the box end 38 and a handle 42 of the ring spanner 40 includes a compartment 36 for slidably receiving a pawl 30. FIGS. 7a through 7c illustrate the pawl 30. The pawl 30 includes a plurality of teeth 31 that are formed complimentary to the curvatures of the asymmetric arcuate concave teeth 22. An end 33 of the pawl 30 is attached to an end of an elastic member 32 the other end of which is received in a cavity 34 defined in a wall 36a defining the compartment 36, best shown in FIG. 4. FIG. 17 illustrates a conventional arrangement of a ratchet type ring spanner 9 that has a box end 9a for rotatably receiving the ratchet wheel 5. A web area (not labeled) of the ring spanner 9 includes a compartment 10 for slidably receiving a pawl 11. FIGS. 8a through 8c illustrate the pawl 11. The pawl 11 includes a plurality of teeth 11a that are formed complimentary to the curvatures of the symmetric arcuate concave teeth 6. An end (not labeled) of the pawl 11 is attached to an end of an elastic member 12, the other end of which member is received in a cavity 10a defined in a wall 10b defining the compartment 10, best shown in FIG. 17. FIGS. 8a, 8b, 8c, and 17 are illustrated for comparison purpose. In addition, the difference in the wall thickness “t1” of the ratchet wheel 20 of the present invention and the wall thickness “t” of conventional ratchet wheel 5 can also be clearly seen in FIG. 6 and by means of comparing FIG. 5 with FIG. 20.

In use of the ring spanner equipped with the ratchet wheel 20 in accordance with the present invention, referring to FIG. 9, the angle δ between a force N normal to the operative side P and the tangent T to the intersection I between the pawl 30 and the wall 36a defining the compartment 36 is smaller than that in the prior art ratchet wheel (see FIG. 18). As a result, the pawl 30 in FIG. 9 is reliably pushed toward the wall 36a defining the compartment 36 and thus provides a reliable engagement between the concave teeth 22 of the ratchet wheel 20 and the teeth 31 of the pawl 30. If the angle δ reaches 90°, the pawl moves toward the central area of the ratchet wheel compartment and thus results in an undesired “sliding” effect, as there is no horizontal force imparted to move the pawl toward the wall 36a of the compartment 36. Thus, the ratchet wheel 20 and the pawl 30 in accordance with the present invention provides an engagement more reliable than that between the conventional ratchet wheel 5 and the pawl 11 and thus less likely to “slide”. The spanner with the ratchet wheel/pawl combination in accordance with the present invention can be used in a relatively small space and can be operated in a convenient manner. More specifically, the spanner is allowed to rotate in a reverse direction without disengaging the box end from the fastener when the spanner is stopped by an obstacle during ratcheting. And, and the spanner is then ready for the next ratcheting movement. This is very convenient and timesaving.

Referring to FIGS. 9 and 10, when the operative side P of the concave tooth 22 of the ratchet wheel 20 in accordance with the present invention is subjected to a force F during ratcheting, the area filled by the pawl 30 for bearing such force F is 2/1.732 h2. Referring to FIG. 19, for a conventional ratchet wheel 5, when either operative side P of the concave tooth 6 of the ratchet wheel 5 is subjected to a force F, the area filled by the pawl 11 for bearing such force F is h2 which is smaller than that provided by the ratchet wheel/pawl combination in accordance with the present invention. Namely, the ratchet wheel 20 with asymmetric arcuate concave teeth 22 provides a higher torque for ratcheting (i.e., tightening or loosening a fastener such as a nut or bolt head).

Referring to FIGS. 21 and 22, in a second embodiment of the ratchet wheel in accordance with the present invention, the ratchet wheel (now designated by 50) includes an inner periphery 54 for driving a fastener (not shown) and an outer periphery having a plurality of non-arcuate concave teeth 52. The non-arcuate concave teeth 52 is are formed by means of roll squeezing method, investment casting, or molding, which is quicker than formation by a cutter. Each non-arcuate concave tooth 52 may be trapezoidal, triangular, or any other shape that results from formation other than cutting. The production cost for the ratchet wheel 50 with non-arcuate concave teeth 52 in accordance with the present invention is largely reduced, as the production time for the non-arcuate concave teeth 52 is relatively short. In addition, the non-arcuate concave teeth 52 may be symmetric or asymmetric. When the ratchet wheel 50 has non-arcuate symmetric concave teeth 52, the resultant structure provides a driving torque approximately the same as that provided by the conventional ratchet wheel 5 with symmetric arcuate concave teeth 6. When the ratchet wheel 50 has non-arcuate asymmetric concave teeth 52 configured similar to concave teeth 22, the resultant structure provides a higher driving torque than that provided by the conventional ratchet wheel 5 with symmetric arcuate concave teeth 6.

Each concave tooth 52 is defined by two sides each including a radially inner linear edge 52a and a radially outer linear edge 52b. Each concave tooth 52 is further defined by a first intersection of the radially inner linear edges 52a of each of the two sides with an adjacent tooth 52 and by a second intersection of the radially outer linear edges 52b of the two sides and which is substantially parallel to the first arcuate intersection. The plurality of concave teeth 52 have an axial extent less than that between the axial ends 51a and 51b and are axially spaced therefrom so that first and second axially spaced portions 53a and 53b are defined between each of the axial ends 51a and 51b and concave teeth 52. Each non-arcuate tooth 52 has third and fourth axial ends 53e that are spaced radially inside from the outer periphery of ratchet wheel 50. Inclined annular walls 53d extend between the outer periphery of the ratchet wheel 50 and the axial ends 53e, with the inclined annular walls 53d having decreasing radial spacing from the outer periphery of the ratchet wheel 50 to the axial ends 53e.

Referring to FIG. 23, the ratchet wheel 50 in accordance with the present invention may be rotatably mounted in a box end 38 of a ring spanner 40. A web area 39 of the ring spanner 40 includes a compartment 36 for receiving a pawl 60. FIGS. 26a through 26c illustrate the pawl 60. The pawl 60 includes a plurality of teeth 61 that are formed complimentary to the curvatures of the non-arcuate concave teeth 52. An end 62 of the pawl 60 is attached to an end of an elastic member 32, the other end of which is received in a cavity 34 defined in a wall 36a defining the compartment 36, best shown in FIG. 23. A detail comparison between the conventional pawl 11 illustrated in FIGS. 8a through 8c, the pawl 30 of the first embodiment of the present invention illustrated in FIGS. 7a through 7c, and the pawl 60 of this embodiment illustrated in FIGS. 26a through 26c would be appreciated. In addition, difference in the wall thickness of the ratchet wheel 50 of the present invention and the wall thickness of conventional ratchet wheel 5 can also be clearly seen in FIG. 25 and by means of comparing FIG. 24 with FIG. 20.

According to the above description, it is appreciated that the ratchet wheel with asymmetric arcuate concave teeth in accordance with the present invention provides a higher torque for operation and has improved structural strength as having a thicker wall in the ratchet wheel. The engagement between the ratchet wheel with asymmetric arcuate concave teeth and the pawl with asymmetric arcuate concave teeth is more reliable. The ratchet wheel with non-arcuate concave teeth in accordance with the present invention reduces the production cost for the ratchet wheel. The ratchet wheel with non-arcuate concave teeth also provides a higher torque for operation when the non-arcuate concave teeth is asymmetric. A spanner with the ratchet wheel/pawl combination in accordance with the present invention can be used in a relatively small space. Nevertheless, the ratchet wheel/pawl combination in accordance with the present invention is not limited to be used in the box end of a ring spanner. Namely, the ratchet wheel/pawl combination may be used in other ratcheting tools such as ratchet wrenches.

Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims (38)

What is claimed is:
1. A ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
2. A ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
3. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are not formed by cutting.
4. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are formed by roll squeezing.
5. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are formed by investment casting.
6. The ratchet wheel as claimed in claim 2, wherein each said asymmetric non-arcuate concave tooth is trapezoidal.
7. The ratchet wheel as claimed in claim 2, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
8. A ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having formed into the outer periphery to have a radial depth and be defined by two sides, with the plurality of symmetric teeth radially spaced inwards from the outer periphery, and an by a non-arcuate intersection of the two sides, wherein the plurality of symmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetrical teeth and the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, wherein the ratchet wheel including includes a center, and a radial line from the center to through the non-arcuate intersection dividing divides an angle that is defined between the two sides into two equal angle portions, and wherein each tooth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
9. The ratchet wheel as claimed in claim 8, wherein said symmetric non-arcuate concave teeth are not formed by cutting.
10. The ratchet wheel as claimed in claim 8, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
11. The ratchet wheel as claimed in claim 8, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from investment casting.
12. The ratchet wheel as claimed in claim 8, wherein each said symmetric non-arcuate concave tooth is trapezoidal.
13. The ratchet wheel as claimed in claim 8, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
14. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel rotatably mounted in the hole of the end, the ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric arcuate concave teeth of the ratchet wheel; and
means for biasing the pawl toward a wall defining the compartment.
15. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment, that is open towards the hole, being defined formed in an area between the handle and the end and defined by a wall;
a ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of asymmetric non-arcuate concave teeth having each formed into the outer periphery to have a radial depth and be defined by two sides, wherein the plurality of asymmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the asymmetric teeth, wherein the plurality of asymmetrical teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner linear edge and an a radially outer linear edge, with each tooth further defined by a first non-arcuate intersection of the inner radial inner linear edge of each of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions with an adjacent tooth and by a second non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection;
a pawl slidably mounted received in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth each complimentarily corresponding to each of the plurality of asymmetric non-arcuate concave teeth of the ratchet wheel; and
means for engaging an end of the pawl and biasing the pawl toward a wall portion of the wall defining the compartment;
wherein the two sides include an operative side and the operative sides of the asymmetric teeth configured to cooperate with the teeth of the pawl in said ratcheting tool during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said wall portion to provide for a reliable engagement of the teeth of the pawl into the asymmetric teeth of the ratchet wheel,
wherein the second non-arcuate intersection is radially spaced inwards of the outer periphery, wherein the ratchet wheel includes a center, and with a line from the center to the first non-arcuate intersection dividing an angle between the two sides into two unequal angle portions, wherein each tooth of the ratchet wheel has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
16. The ratchet wheel ratcheting tool as claimed in claim 15, wherein said two sides of each of the asymmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
17. The ratchet wheel as claimed in claim 15, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
18. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end, the compartment having a crescent shape between the hole and a wall defining the compartment;
a ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having formed into the outer periphery to have a radial depth and be defined by two sides radially spaced inwards from the outer periphery, wherein the plurality of symmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetric teeth, wherein the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner edge and an a radially outer edge, with each symmetric tooth further defined by a first non-arcuate intersection of the radially inner edge of each of the two sides with an adjacent tooth and by a non-arcuate intersection of the radially outer edges of the two sides and which is parallel to the first non-arcuate intersection, wherein the ratchet wheel including a center, a line from the center to the non-arcuate intersection dividing an angle between of the radially outer edges of the two sides into two equal portions is radially spaced inwards of the outer periphery;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth each complimentarily corresponding to each of the symmetric non-arcuate concave teeth of the ratchet wheel; and
means for engaging the pawl and biasing the pawl toward a curved wall portion of the wall defining the compartment;
wherein the two sides include an operative side and the operative sides of the symmetric teeth of the ratchet wheel are configured to cooperate with the engaging teeth of the pawl during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said curved wall portion to provide for a reliable engagement of the teeth of the pawl into the symmetric teeth, and
the ratchet wheel includes a center, with a radial line from the center to the first non-arcuate intersection dividing an angle that is defined between the two sides into two equal angle portions, and
each tooth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
19. The ratchet wheel ratcheting tool as claimed in claim 18, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
20. The ratchet wheel as claimed in claim 18, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
21. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole having an inner periphery,
a compartment that is in open communication with the hole, the compartment formed between the inner periphery of the hole and a wall defining the compartment;
a ratchet wheel having a first axial end, a second axial end, and an outer periphery, with the outer periphery including a plurality of symmetric teeth each formed into the outer periphery to have a radial depth and be defined by two sides, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each symmetric tooth further defined by a first non-arcuate intersection of the radially inner linear edge of each of the two sides with an adjacent symmetrical tooth and by a non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection; and
a pawl slidably received in the compartment and engaged with the ratchet wheel, the pawl including a plurality of teeth that each complimentarily correspond to each of the symmetric teeth of the ratchet wheel and being biased by an elastic member toward a curved wall portion of said wall defining the compartment;
wherein the two sides include an operative side and the operative sides of the symmetric teeth are configured to cooperate with the plurality of teeth of the pawl during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said curved wall portion to provide for a reliable engagement of the teeth of the pawl into the symmetric teeth of the ratchet wheel;
wherein the ratchet wheel includes a center and a radial line from the center through the first non-arcuate intersection divides an angle that is defined between the two sides into two equal angle portions, with the plurality of symmetric teeth having a maximum radial extent from the center less than the outer periphery; and
wherein the plurality of symmetrical teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetrical teeth and the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, each tooth having a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined wall extending between an adjacent one of the first and second axially spaced portions and the third axial end, with the inclined wall having decreasing radial spacing from the adjacent one of the first and second axially spaced portions to the third axial end.
22. The ratcheting tool as claimed in claim 21, wherein the first axially spaced portion includes a radially extending annular recess.
23. The ratcheting tool as claimed in claim 22, with the first and second axially spaced portions having equal radial extents.
24. A ratchet wheel in combination with a pawl configured to be slidably received in a compartment of a ratcheting tool that is defined by a wall and to be biased by an elastic member toward a wall portion of said wall,
the ratchet wheel having a first axial end, a second axial end, and an outer periphery, with the outer periphery including a plurality of symmetric teeth each formed into the outer periphery to have a radial depth and be defined by two sides, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each tooth further defined by a first non-arcuate intersection of the radially inner linear edge of each of the two sides with an adjacent tooth and by a second non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection,
the ratchet wheel including a center, with a radial line from the center through the first non-arcuate intersection dividing an angle between the two sides into two equal portions, with the plurality of symmetric teeth having a maximum radial extent from the center less than the outer periphery,
the pawl including a plurality of teeth that each are formed complimentarily to each of the teeth of the ratchet wheel and that are engaged by a plurality of operative sides of the teeth of the ratchet wheel, the pawl further configured to be pushed by the plurality of operative sides against said wall portion to provide for a reliable engagement of the teeth of the pawl into the teeth of the ratchet wheel,
the plurality of symmetrical teeth having an axial extent less than an axial extent between the first and second axial ends and being axially spaced from the first and second axial ends to define first and second axially spaced portions, so that the plurality of symmetrical teeth are intermediate the first and second axially spaced portions,
each of the teeth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined wall extending between an adjacent one of the first and second axial spaced portions and the third axial end, with the inclined wall having decreasing radial spacing from the adjacent one of the first and second axially spaced portions to the third axial end.
25. The ratchet wheel as claimed in claim 8, wherein the angle between the two sides is of 90 degrees, so that said angle portions are each of 45 degrees.
26. The ratchet wheel as claimed in claim 25, wherein said two sides of each of the symmetric teeth are of a formation resulting from roll squeezing.
27. The ratcheting tool as claimed in claim 15, wherein said angle is of 90 degrees and said two unequal portions are selected from either of 30 and 60 degrees and of 40 and 50 degrees.
28. The ratcheting tool as claimed in claim 15, wherein said engaging and biasing means is an elastic member that is disposed in the compartment and is engaged with an end of the pawl.
29. The ratchet wheel as claimed in claim 18, wherein the angle between the two sides is of 90 degrees so that the angle portions are each of 45 degrees.
30. The ratcheting tool as claimed in claim 18, wherein said engaging and biasing means is an elastic member that is disposed in the compartment and is engaged with an end of the pawl.
31. A combination of a ratchet wheel and a pawl in a ratcheting tool of a type in which the pawl is configured to be slidably received in a compartment of the ratcheting tool and to be biased by an elastic member towards a curved wall portion of a wall defining the compartment,
the ratchet wheel having an outer periphery and first and second axial ends, the outer periphery including a plurality of teeth each formed into the outer periphery to have a radial depth and be defined by two sides, wherein the plurality of teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the teeth, wherein the plurality of teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each tooth further defined by a first intersection of the radially inner linear edge of each of the two sides with an adjacent tooth and by a second intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first intersection,
the pawl including a plurality of teeth each formed complimentarily to each of the teeth of the ratchet wheel to fill the area between the two facing sides,
wherein the two sides include an operative side and the plurality of the teeth of the pawl are engaged by a plurality of operative sides of the plurality of teeth, the pawl further configured to cooperate with the plurality of teeth of the ratchet wheel in said ratcheting tool during ratcheting to be pushed by the plurality of operative sides against said curved wall portion to provide for a reliable engagement of the plurality of teeth of the pawl into the plurality of teeth of the ratchet wheel, and
wherein the ratchet wheel includes a center and a radial line from the center through the first intersection divides an angle that is defined between the two sides into two unequal portions, wherein the first intersection is non-arcuate and is radially spaced inwards from the outer periphery of the ratchet wheel, wherein each tooth has a third axial end, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
32. The combination as claimed in claim 31, wherein said angle is of 90 degrees and said two unequal portions are selected from either of 30 and 60 degrees and of 40 and 50 degrees.
33. The combination as claimed in claim 31, wherein the second intersection is arcuate in shape in a direction parallel to the outer periphery.
34. The combination as claimed in claim 32, wherein the second intersection is arcuate in shape in a direction parallel to the outer periphery.
35. The combination as claimed in claim 31, wherein the first intersection is non-arcuate.
36. The combination as claimed in claim 31, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
37. The combination as claimed in claim 32, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
38. The combination as claimed in claim 35, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
US10301491 1999-08-03 2002-11-21 Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl Active USRE43286E1 (en)

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US10301491 Active USRE43286E1 (en) 1999-08-03 2002-11-21 Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170120425A1 (en) * 2015-11-01 2017-05-04 Li-Ching Lin Ratchet wrench with restriction member for retricting movement of pawl

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148695A (en) * 1999-08-03 2000-11-21 Hu; Bobby Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6488136B2 (en) * 2000-06-26 2002-12-03 Chih-Ming Chang Ratchet wheel structure of ratcheting wrench
US6453779B2 (en) 2000-07-21 2002-09-24 Bobby Hu Positioning device for a switch member of a reversible ratchet-type wrench
US6457389B1 (en) 2000-08-22 2002-10-01 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6666112B2 (en) 2000-09-01 2003-12-23 Bobby Hu Switching arrangement for a reversible ratchet type wrench
DE20115710U1 (en) * 2000-09-27 2001-12-13 Chang Chih Ming Ratchet wrench with high torque
US6745647B2 (en) * 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
US6516930B2 (en) * 2000-12-29 2003-02-11 Ching Chen Ratchet mechanism for tools
US6305247B1 (en) * 2001-01-09 2001-10-23 Ching Chen Ratchet wrench structure
US6629477B2 (en) * 2001-01-11 2003-10-07 Hand Tool Design Corporation Reversible ratchet wrench with high torsion
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
US6732614B2 (en) 2001-02-19 2004-05-11 Bobby Hu Easy-to-manufacture and easy-to-assemble ratcheting-type wrench
US6807882B2 (en) 2001-05-07 2004-10-26 Bobby Hu Wrench with a simplified structure
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
US6758641B2 (en) 2001-07-13 2004-07-06 Bobby Hu Method for manufacturing a ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6647832B2 (en) 2001-07-27 2003-11-18 Bobby Hu Wrench having two rigid supporting areas for a pawl
US6539825B1 (en) 2001-09-20 2003-04-01 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US6450066B1 (en) * 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
US6520051B1 (en) 2001-12-27 2003-02-18 Bobby Hu Head of a wrench handle
US6644148B2 (en) 2002-02-08 2003-11-11 Bobby Hu Reversible ratchet-type wrench
EP1413399B1 (en) * 2002-09-26 2011-11-09 Terence Chen Ratchet wrench
US6918323B2 (en) * 2002-11-01 2005-07-19 Easco Hand Tools Inc. Reversible ratcheting tool with improved pawl
EP1426144B1 (en) * 2002-12-03 2006-12-06 Terence Chen One-way wrench
US7171875B2 (en) * 2003-01-28 2007-02-06 Bobby Hu Adjustable head for a wrench
US7044029B1 (en) 2004-06-28 2006-05-16 Snap-On Incorporated Ratcheting tool with pawl spring retainer
US7263919B2 (en) * 2004-09-10 2007-09-04 Easco Handtools, Inc. Ratcheting tool with vertically curved tooth arrangement
CN201399751Y (en) * 2009-05-14 2010-02-10 杭州阳工五金有限公司 Ratchet wheel double-purpose spanner
US8459151B2 (en) 2010-05-28 2013-06-11 Meridian International Co., Ltd. Ratcheting socket wrench and sockets
USD665237S1 (en) * 2012-01-23 2012-08-14 Hung-Yin Wei Swingable ratchet wheel
US9010220B2 (en) * 2013-09-13 2015-04-21 Chia-Yu Chen Pass-thru ratchet wrench
CN104708569A (en) * 2015-03-17 2015-06-17 周少岐 Insulating ratchet wrench

Citations (242)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US15482A (en) 1856-08-05 Wrench
US726012A (en) 1903-01-20 1903-04-21 Howard Emmet Andrew Nut-wrench.
US810599A (en) * 1905-04-10 1906-01-23 Eugene K Ansorge Wrench.
US818761A (en) 1906-01-20 1906-04-24 Frederick A Hanes Ratchet-wrench.
US841686A (en) 1906-11-20 1907-01-22 John N Hatfield Wrench.
US878657A (en) 1906-01-02 1908-02-11 Arthur Munch Ratchet-wrench.
US893097A (en) 1907-09-27 1908-07-14 Joseph M Reams Reversible ratchet-wrench.
US915446A (en) 1908-09-23 1909-03-16 Joseph M Kearnes Wrench.
US1033358A (en) 1911-12-09 1912-07-23 John L Turner Wrench.
US1078059A (en) 1913-10-01 1913-11-11 Frank Mossberg Company Wrench.
US1090578A (en) 1911-06-10 1914-03-17 Joseph B Smythe Ratchet mechanism.
US1157427A (en) * 1915-07-29 1915-10-19 Michael Vern Seivert Wrench.
US1194471A (en) 1916-08-15 Combihatiob
US1261092A (en) 1914-06-18 1918-04-02 Fred R Allen Wrench.
FR498276A (en) 1919-04-12 1920-01-07 Costantino Roccati Key for mechanical parts
US1382492A (en) 1920-12-10 1921-06-21 Evans Lafayette Wrench
US1426127A (en) 1920-04-23 1922-08-15 Frank Mossberg Company Ratchet wrench
DE373436C (en) 1923-04-12 Johann Behrens Steckschluessel for railway Fish bolts
US1601767A (en) 1923-07-20 1926-10-05 Otto R Peterson Ratchet wrench
US1614039A (en) 1924-02-01 1927-01-11 Husky Wrench Company Wrench
US1639078A (en) 1925-03-14 1927-08-16 John E Coe Ratchet wrench
US1680515A (en) 1926-12-21 1928-08-14 Buda Co Ratchet mechanism for lifting jacks
US1733355A (en) * 1927-07-25 1929-10-29 Calvin E Morse Wrench
US1772524A (en) 1927-04-08 1930-08-12 Snap On Wrench Company Ratchet wrench
US1957462A (en) 1933-01-25 1934-05-08 Williams J H & Co Ratchet wrench
US2193984A (en) 1937-04-16 1940-03-19 Armstrong Bros Tool Co Reversible ratchet wrench
US2201705A (en) 1938-07-19 1940-05-21 Wright Tool And Forge Company Ratchet wrench
US2201827A (en) 1939-04-17 1940-05-21 Otto P Froeschl Ratchet mechanism
US2317461A (en) 1940-03-22 1943-04-27 Lucian C Jackson Wrench
US2542241A (en) 1946-10-23 1951-02-20 New Britain Machine Co Ratchet mechanism
US2612807A (en) 1947-11-17 1952-10-07 Ralph R Hunt Ratchet wrench spinner
US2657604A (en) 1952-09-11 1953-11-03 Sherman Klove Co Ratchet wrench
DE921198C (en) 1944-01-04 1954-12-09 Friedrich Wilhelm Thienes Mutternschluessel with freewheel ratchet
US2701977A (en) 1953-05-07 1955-02-15 Wright Tool And Forge Company Reversible ratchet wrench
US2735324A (en) 1956-02-21 Friction action ratchet wrench
US2764048A (en) 1955-02-07 1956-09-25 Leslie V Thompson Ratchet wrench
US2769360A (en) 1954-09-10 1956-11-06 Cottrell Wayne Woodford Angular wrench head having upwardly opening socket
US2800821A (en) 1953-10-01 1957-07-30 New Britain Machine Co Angularly adjustable, reversible ratchet wrench
US2803980A (en) 1955-12-27 1957-08-27 Irwin R Vogel Reversible ratchet wrench
US2891434A (en) 1958-04-21 1959-06-23 Lozensky Charles Andrew Ratchet wrench
DE1810811U (en) 1958-11-14 1960-05-05 Emka Metallwarenfabrik A G Wasserbehaelter plastic for hot-water geraete.
US2957377A (en) 1957-09-13 1960-10-25 Terence G Hare Reversible ratchet type wrench
US2978081A (en) 1956-08-13 1961-04-04 Bahco Ab Devices in ratchet wrenches
US3019682A (en) 1960-04-08 1962-02-06 Terence G Hare Reversible ratchet type wrench
US3044591A (en) 1959-08-31 1962-07-17 Luther E Kilness Ratchet mechanism
US3233481A (en) 1963-10-25 1966-02-08 Kelsey Hayes Co Ratchet wrench
US3250157A (en) 1963-11-06 1966-05-10 Snap On Tools Corp Magnetic ratchet mechanism for wrenches and the like
US3265171A (en) 1964-06-22 1966-08-09 Luther E Kilness One way reversible clutch for wrench
US3269496A (en) 1964-06-22 1966-08-30 Luther E Kilness Reversible one way clutch for wrench
US3337014A (en) 1965-10-20 1967-08-22 John A Sandrick Ratchet wrench
US3342229A (en) 1965-10-21 1967-09-19 James Igor Ratchet handle screwdriver
US3393587A (en) 1966-12-15 1968-07-23 Wright Tool And Forge Company Ratchet wrenches
US3393780A (en) 1967-01-26 1968-07-23 Luther E. Kilness Reversible ratchet
US3436992A (en) 1967-03-10 1969-04-08 Pendleton Tool Ind Inc Reversible ratchet wrench with floating pawls
US3508455A (en) 1968-02-16 1970-04-28 John F Miller Combination tool
US3575069A (en) 1969-07-29 1971-04-13 Kit C White Ratchet and speed wrench combination
US3577816A (en) 1969-04-10 1971-05-04 Jerry Alexander Ratchet wrench
US3598001A (en) 1969-02-14 1971-08-10 Lowell Corp Reversible ratchet handle for socket wrench
US3606940A (en) 1969-01-11 1971-09-21 Walter Finkeldei Werkzeugfabri Ratchet switchable into opposite directions of operation
US3691876A (en) 1971-02-08 1972-09-19 Leon Cassidy Jr Ratchet spinner wrench
US3713356A (en) 1971-01-18 1973-01-30 Snap On Tools Corp Socket release mechanism for wrenches and the like
US3742788A (en) 1972-07-20 1973-07-03 Parker Mfg Co Ratchet wrench
US3783703A (en) 1972-11-17 1974-01-08 Jo Line Tools Ratchet mechanism
US3838614A (en) * 1972-12-12 1974-10-01 Donnell W O Reciprocating engine barring tool
US3866492A (en) 1974-03-06 1975-02-18 Jo Line Tools Torque multiplier
US3908487A (en) 1971-09-10 1975-09-30 Stanley Works Rotary hand tool
US3970155A (en) 1974-01-14 1976-07-20 Jo-Line Tools, Inc. Electronic torque wrench
US4053037A (en) 1976-06-10 1977-10-11 Jo-Line Tools, Inc. Reversing ratchet
US4070932A (en) 1977-03-01 1978-01-31 Jeannotte Richard W Extensible handle for a tool headpiece
US4111077A (en) 1977-02-02 1978-09-05 Lowell Corporation Ratchet wrench
US4128025A (en) 1977-08-08 1978-12-05 Main Harvey M Bolt starting device
US4147076A (en) 1977-10-31 1979-04-03 The Wright Tool And Forge Company Reversing-ratchet socket wrench
GB1559093A (en) 1977-04-07 1980-01-16 Gordon Tools Ltd Ratchet drivers
US4257507A (en) 1978-08-15 1981-03-24 Jo-Line Tools, Inc. Torque wrench with pawl guide
US4274311A (en) 1979-07-23 1981-06-23 Emil Ebert Ratchet wrench handle
US4277990A (en) 1979-11-14 1981-07-14 Duro Metal Products Company Ratchet wrench
US4277989A (en) 1979-05-01 1981-07-14 Tracy Kurt L Ratchet wrench handle
US4308768A (en) 1979-05-10 1982-01-05 Rems-Werk Christian Foll Und Sohne Gmbh & Co. Ratchet lever
US4308769A (en) 1980-06-02 1982-01-05 Bertha Rantanen Reversing ratcheting wrench
US4328720A (en) 1980-03-17 1982-05-11 Shiel Walter P Socket wrench and set
US4336728A (en) 1980-10-08 1982-06-29 Deibert Raymond L Push-button reversible ratchet and pawl socket wrench handle
US4406186A (en) 1981-05-29 1983-09-27 Gummow Stephen A Dual action ratchet wrench
US4420995A (en) 1981-06-05 1983-12-20 Roberts Peter M Quick-release and positive locking mechanism for use on socket wrenches and on power and impact tools
GB2135226A (en) 1983-02-16 1984-08-30 Britool Ltd Ratchet wrench
US4485700A (en) 1983-01-26 1984-12-04 Colvin David S Reversible ratchet wrench
US4488460A (en) 1982-07-28 1984-12-18 Easco Corporation Ergonomic handle for hand tool
US4512218A (en) 1984-03-19 1985-04-23 Chow Kirk K Control bar for ratchet wrench
US4515044A (en) * 1980-10-23 1985-05-07 Harstad Larry V Quick change ratchet wrench
US4520697A (en) 1982-09-29 1985-06-04 Moetteli John B Ratchet wrench
US4631990A (en) * 1985-08-02 1986-12-30 Hughes Matthew E Open-ended ratchet wrench
US4631988A (en) 1983-01-26 1986-12-30 Colvin David S Reversible ratchet wrench including detent mechanism
US4662251A (en) 1985-10-08 1987-05-05 Kohal Lester L Orthogonal adjustable socket wrench
US4709600A (en) 1984-02-28 1987-12-01 Applied Power, Inc. Power screw driver with a ratchet wheel having finely graduated toothing
US4722252A (en) 1987-03-02 1988-02-02 Fulcher William A Power driven wrench
US4722253A (en) 1987-01-21 1988-02-02 Jessie Chow Reversible ratchet wrench with one-hand accessible switch
US4762033A (en) 1987-02-24 1988-08-09 National Hand Tool Corporation Ratchet wrench with manual disassembly capability
US4770072A (en) 1985-01-07 1988-09-13 Eduard Wille Gmbh & Co. Reversible ratchet wrench
US4777852A (en) 1986-10-02 1988-10-18 Snap-On Tools Corporation Ratcheting screwdriver
US4796492A (en) 1988-05-20 1989-01-10 Liou Mou Tang Clutch type socket wrench
US4807500A (en) 1986-11-14 1989-02-28 Main Harvey M Reversing ratchet mechanism for tools
US4862775A (en) 1988-10-19 1989-09-05 Jessie Chow Control device for ratchet wrenches
US4869138A (en) 1988-02-08 1989-09-26 Farris Jim L New and improved ratchet tool with rotatable rotor lock and rigid shifter finger
US4903554A (en) 1988-06-02 1990-02-27 Colvin David S Reversible ratchet wrench with thin head construction
US4924737A (en) 1989-03-20 1990-05-15 Gummow Tool Company Positive drive ratchet
US4934220A (en) 1989-04-03 1990-06-19 Snap-On Tools Corporation Sealed reversible ratchet wrench
US4986147A (en) 1989-07-20 1991-01-22 National Hand Tool Corporation Ratchet wrench having an internally reinforced handle
US4991468A (en) 1990-08-10 1991-02-12 Lee Clark J Barrel type sockets
US5000066A (en) 1983-07-05 1991-03-19 Gentiluomo Paul A Ratchet wrench
US5012705A (en) 1990-03-16 1991-05-07 National Hand Tool Corporation Ratchet wrench with manually removable core
US5038452A (en) 1988-01-28 1991-08-13 Latshaw Enterprises, Inc. Method of assembling an improved ratcheting tool driver
US5076121A (en) 1989-07-28 1991-12-31 Gregory Fosella Adjustable ratchet wrench
US5095781A (en) 1991-01-18 1992-03-17 Stanley-Parker, Inc. Ratchet spinner
US5144869A (en) 1992-03-09 1992-09-08 Jessie Chow Control device for ratchet wrenches
US5157994A (en) 1991-12-13 1992-10-27 Snap-On Tools Corporation Ratchet wrench with lost motion reversing mechanism
US5178047A (en) 1991-08-08 1993-01-12 Easco Hand Tools, Inc. Reversible ratchet wrench
US5199335A (en) 1992-05-11 1993-04-06 Easco Hand Tools, Inc. Flex-head tool with locking feature
US5199330A (en) 1991-10-01 1993-04-06 Easco Hand Tools, Inc. Reversing ratchet wrench
US5230262A (en) 1991-03-27 1993-07-27 Ab Sandvik Bahco Ratchet wrench
US5231903A (en) 1990-12-20 1993-08-03 Hi-Shear Corporation Reversible ratchet wrench
US5233891A (en) 1991-09-06 1993-08-10 Easco Hand Tools, Inc. Detent means
US5271300A (en) 1992-07-14 1993-12-21 Snap-On Tools Corporation Composite hand tool
US5295422A (en) 1993-04-23 1994-03-22 Jessie Chow Wrench having a greater driving strength
US5347892A (en) 1993-03-11 1994-09-20 Moetteli John B Socket retainer for thin-wall drive member
US5392672A (en) 1993-03-09 1995-02-28 Larry R. Larson Ratchet wrench
US5404773A (en) 1992-08-10 1995-04-11 Norville; Burl O. Cam-action ratchet-type wrench
US5425291A (en) 1994-04-05 1995-06-20 Chang; Sheue Z. Unidirectional driving head assembly
US5448931A (en) 1989-07-28 1995-09-12 Great Bay Tool Corp. Adjustable wrench
US5467672A (en) 1992-04-20 1995-11-21 Ashby; Earl T. Open end ratchet wrench
US5477757A (en) 1994-09-06 1995-12-26 Maresh; Joseph D. Ergonomic ratchet wrench
US5495783A (en) 1994-07-08 1996-03-05 Snap-On Incorporated Reversible ratchet wrench with direction indicia
US5499560A (en) 1994-05-20 1996-03-19 Aeschliman; William M. Universal open ended socket wrench
US5509333A (en) 1993-01-28 1996-04-23 Rion; John D. Low profile ratchet adapter
US5522288A (en) 1994-12-09 1996-06-04 Snap-On Incorporated Reversible ratchet wrench
US5533427A (en) * 1995-03-27 1996-07-09 Chow; Jessie Ratchet wrench having ratchet teeth of higher strength
US5535646A (en) 1995-02-07 1996-07-16 Stanley Mechanics Tools, Inc. Ratchet drive
US5557994A (en) 1995-07-17 1996-09-24 Nakayama; Tatsuo Ratchet handle with torque adjustment
US5582081A (en) 1994-08-23 1996-12-10 Lin; Ching-Chou Reversible screwdriver
US5584220A (en) 1994-03-01 1996-12-17 Darrah; Scott A. Angle attachment tool
US5595095A (en) 1994-10-13 1997-01-21 Hillinger; George Ratcheting socket wrench with intermeshing gears
US5622089A (en) 1995-12-14 1997-04-22 Gifford, Sr.; Robert W. Ratchet wrench with thumb activated direction control switch
US5626062A (en) 1992-01-16 1997-05-06 Colvin; David S. Socket and ratchet wrench
US5626061A (en) 1995-07-13 1997-05-06 Stanley Mechanics Tools Composite ratchet
US5636557A (en) 1996-05-24 1997-06-10 Ma; Nai-Lin Ratchet type ring spanner
US5669875A (en) 1996-04-16 1997-09-23 United States Surgical Corporation Endoscopic surgical apparatus with longitudinal actuation
US5709137A (en) 1995-04-24 1998-01-20 Blacklock; Gordon D. Torque clutched reversible ratchet wrench
US5749272A (en) 1996-04-24 1998-05-12 Phan; Tan Thanh Ratchet screw driver
US5782147A (en) 1996-11-21 1998-07-21 Hand Tool Design Corporation Ratchet wrench having two-pawl action
US5794496A (en) 1996-12-05 1998-08-18 Hand Tool Design Corporation Pawl module for ratchet wrench
US5806383A (en) * 1996-11-07 1998-09-15 Hsieh; Chih-Ching Crescent wrench
US5829326A (en) 1997-09-04 1998-11-03 Hand Tool Design Corporation Cover plate for a ratchet wrench
US5842391A (en) 1997-03-07 1998-12-01 Chaconas; Peter Constantine Wrench with ratcheting action
US5857390A (en) 1996-12-24 1999-01-12 Whiteford; Carlton L. Reversible ratchet wrench including thin-walled sockets
US5873286A (en) 1997-04-08 1999-02-23 Hand Tool Design Corporation Flex pawl
US5878635A (en) 1996-04-16 1999-03-09 Hsieh; Chih-Ching Reversible ratchet wrench
US5884538A (en) 1997-06-13 1999-03-23 Hand Tool Design Corporation Detent for a hand tool
US5884537A (en) 1997-06-20 1999-03-23 Chen; Chun Chiung Ratchet tool
US5887493A (en) 1994-07-14 1999-03-30 Main; Harvey M. Ratchet wrench
US5901620A (en) 1997-07-31 1999-05-11 Hand Tool Design Corporation Sockets for a ratchet wrench
US5910197A (en) 1997-07-30 1999-06-08 Hand Tool Design Corporation Wrench with supplementary driving lugs formed on its square cross-sectioned drive tang and interchangeable sockets therefor
US5911798A (en) 1997-04-09 1999-06-15 Hand Tool Design Corporation Handle extension for ratchet wrench
US5913954A (en) 1997-09-12 1999-06-22 Hand Tool Design Corporation Pawl for a low profile wrench
US5927158A (en) 1998-03-16 1999-07-27 Lin; Yuan-Ho Combination ratchet wrench
US5946989A (en) 1998-06-15 1999-09-07 Hsieh; Chih-Ching Box end for a box end wrench
US5946987A (en) 1997-11-07 1999-09-07 Wei; Hung-Yin Offset ratchet wrench
US5957009A (en) 1997-10-16 1999-09-28 Mccann; Frank Control mechanism for ratchet wrench
US5964129A (en) 1998-08-04 1999-10-12 Shiao; Hsuan-Sen Ratchet wrench with a direction control ratchet member
US5970552A (en) 1998-02-03 1999-10-26 Hand Tool Design Corporation Scaffold prybar ratchet
US5979274A (en) * 1998-01-07 1999-11-09 Hsieh; Chih-Ching Ratchet wheel mounting arrangement of a wrench
US5996453A (en) 1995-04-24 1999-12-07 Hand Tool Design Corporation Ratchet mechanism which resists spontaneous disengagement for use in wrenches and other tools
US6000302A (en) 1998-04-07 1999-12-14 Chiang; Der Ching Tool having rotatable driving head
US6006631A (en) 1998-05-20 1999-12-28 Miner; Montie H. Through-hole quick release adapters
US6044731A (en) 1999-03-25 2000-04-04 Hsieh; Chih-Ching Double-reversible ratchet wrench
US6065374A (en) 1998-09-16 2000-05-23 Hand Tool Design Corporation Slider pawl
US6125722A (en) 1999-03-18 2000-10-03 Snap-On Tools Company Ratchet wrench with sealed reversing lever
US6134990A (en) 1999-08-05 2000-10-24 Hand Tool Design Corporation Ratcheting tool with improved gear wheel/pawl engagement
US6134991A (en) 1999-03-04 2000-10-24 Hand Tool Design Corporation Pawl for ratchet wrench
USD433896S (en) 2000-01-28 2000-11-21 Wrench
US6152826A (en) 1998-04-29 2000-11-28 Hand Tool Design Corporation Impact universal joint
US6155140A (en) 1999-09-09 2000-12-05 Tsai; Tzen Chang Ratchet wrench
US6161454A (en) 1996-12-18 2000-12-19 Hand Tool Design Corporation Low cost ratchet wrench and method of assembly
US6164167A (en) 1998-06-22 2000-12-26 Chen; Yu-Tang Ratchet wrench having gear driven pawl
US6205889B1 (en) 1998-08-19 2001-03-27 Chih-Ching Hsieh Ratchet socket wrench
US6209423B1 (en) 2000-03-30 2001-04-03 Hsuan-Sen Shiao Ratchet spanner
US6216567B1 (en) 1999-11-05 2001-04-17 Bobby Hu Ratcheting tools having an angle-adjustable head
US6216563B1 (en) 2000-04-10 2001-04-17 Chih-Ching Hsieh Reversible ratchet wheel positioning arrangement for a reversible ratchet socket wrench
US6220123B1 (en) 1999-11-30 2001-04-24 Yu-Tang Chen Structure of a ratchet wrench
US6230591B1 (en) 1999-07-30 2001-05-15 Hand Tool Design Corporation Reversible ratcheting tool with improved gear wheel/pawl engagement
US6240813B1 (en) 1999-07-07 2001-06-05 Hand Tool Design Corporation Drive socket
US6257096B1 (en) 1998-01-30 2001-07-10 David Ling Socket adaptor for ratchet
US6257097B1 (en) 2000-09-27 2001-07-10 Liao I-He Ratchet tool having an eccentric rotator
US6260448B1 (en) 1999-12-21 2001-07-17 Hand Tool Design Corporation Top load ratchet wrench
US6260449B1 (en) 2000-01-24 2001-07-17 Liao I-He Ratchet tool
US6263767B1 (en) 2000-01-19 2001-07-24 Hi-Five Products Developing Co., Ltd. Pawl for a ratchet-type spanner
US6282992B1 (en) 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6282993B1 (en) 2000-06-19 2001-09-04 Tseng Shu-Ying Ratchet mechanism for a ratchet tool
US6282991B1 (en) 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6301998B1 (en) 1999-08-03 2001-10-16 Bobby Hu Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and socket wrench with such ratchet wheel
US6308594B1 (en) 2000-12-28 2001-10-30 Chin-Shun Cheng Ratchet wrench structure
US6332382B1 (en) 1996-02-05 2001-12-25 Wayne Anderson Tool with polygonal head for interchangeable bits
US6334373B1 (en) 2000-04-18 2002-01-01 Chih-Ching Hsieh Ratchet wrench stop member positioning arrangement
US6382052B1 (en) 2001-04-02 2002-05-07 Shwu Ruu Chen Ratchet tool
US6382051B1 (en) 2001-09-05 2002-05-07 Chih-Min Chang Ratchet wrench
US6386072B1 (en) 2001-03-21 2002-05-14 Chi Yuan-Chin Ratchet tool
US6427560B1 (en) 2001-08-17 2002-08-06 Hang Haw Shea Screwdriver device
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6435062B1 (en) 2001-07-05 2002-08-20 The Stanley Works Ratchet wrench having easily assembling structure
US6435063B1 (en) 2001-04-30 2002-08-20 Ching Chen Box end wrench
US6450066B1 (en) 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
US6450068B1 (en) 2001-07-13 2002-09-17 Bobby Hu Ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6453779B2 (en) 2000-07-21 2002-09-24 Bobby Hu Positioning device for a switch member of a reversible ratchet-type wrench
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6457389B1 (en) 2000-08-22 2002-10-01 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6457388B1 (en) 2001-01-25 2002-10-01 Ching Chen Control member for ratchet wrench
US20020162423A1 (en) 2001-05-07 2002-11-07 Bobby Hu Wrench with a simplified structure
US20020162424A1 (en) 2001-05-07 2002-11-07 Bobby Hu Wrench with a simplified structure
US20020166418A1 (en) 2001-05-11 2002-11-14 Hsieh Shih Kuei Wrench capable of avoiding detachment of a screw-thread member
US20020166417A1 (en) 2000-03-13 2002-11-14 Bobby Hu Reversible ratcheting tool with a smaller head
US6488136B2 (en) * 2000-06-26 2002-12-03 Chih-Ming Chang Ratchet wheel structure of ratcheting wrench
US20030010159A1 (en) 2000-04-03 2003-01-16 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6516691B1 (en) 2001-07-27 2003-02-11 Hung Yin Wei Racheting tool with a tapered spring positioning member
US6520051B1 (en) 2001-12-27 2003-02-18 Bobby Hu Head of a wrench handle
US6539825B1 (en) 2001-09-20 2003-04-01 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US20030070512A1 (en) 2001-10-17 2003-04-17 Bobby Hu Reversible ratchet-type wrench
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
US20030121373A1 (en) 2000-06-22 2003-07-03 David Ling Spanner with prevention of disengagement of fasteners
US6591717B2 (en) 2001-01-22 2003-07-15 Hung Yin Wei Plum blossom-shaped ratchet wrench structure
US20030154826A1 (en) 2002-02-21 2003-08-21 Daniel Lee Connector structure of a ratchet wrench
US6629477B2 (en) 2001-01-11 2003-10-07 Hand Tool Design Corporation Reversible ratchet wrench with high torsion
US20030196522A1 (en) 2002-04-22 2003-10-23 Bobby Hu Reversible ratchet type wrench
US6644148B2 (en) 2002-02-08 2003-11-11 Bobby Hu Reversible ratchet-type wrench
US6647832B2 (en) 2001-07-27 2003-11-18 Bobby Hu Wrench having two rigid supporting areas for a pawl
US6662693B2 (en) 2001-07-13 2003-12-16 Bobby Hu Wrench with a fixed maximum operational torque
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
US6666112B2 (en) 2000-09-01 2003-12-23 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6688195B1 (en) 2002-08-07 2004-02-10 Chih-Ching Hsien Bi-directional ratchet wrench
US6708586B1 (en) 2002-10-15 2004-03-23 Yu Tang Chen Ratchet wrench having a direction controller that is assembled easily
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
US6732614B2 (en) 2001-02-19 2004-05-11 Bobby Hu Easy-to-manufacture and easy-to-assemble ratcheting-type wrench
US20040093995A1 (en) 2002-07-22 2004-05-20 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
US6748825B2 (en) 2002-04-22 2004-06-15 Yung-Chung Hsu One-way wrench
US6761092B2 (en) 2002-11-07 2004-07-13 Chih-Ching Hsien Metal piece attraction device on ratchet tool

Patent Citations (248)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1194471A (en) 1916-08-15 Combihatiob
US15482A (en) 1856-08-05 Wrench
DE373436C (en) 1923-04-12 Johann Behrens Steckschluessel for railway Fish bolts
US2735324A (en) 1956-02-21 Friction action ratchet wrench
US726012A (en) 1903-01-20 1903-04-21 Howard Emmet Andrew Nut-wrench.
US810599A (en) * 1905-04-10 1906-01-23 Eugene K Ansorge Wrench.
US878657A (en) 1906-01-02 1908-02-11 Arthur Munch Ratchet-wrench.
US818761A (en) 1906-01-20 1906-04-24 Frederick A Hanes Ratchet-wrench.
US841686A (en) 1906-11-20 1907-01-22 John N Hatfield Wrench.
US893097A (en) 1907-09-27 1908-07-14 Joseph M Reams Reversible ratchet-wrench.
US915446A (en) 1908-09-23 1909-03-16 Joseph M Kearnes Wrench.
US1090578A (en) 1911-06-10 1914-03-17 Joseph B Smythe Ratchet mechanism.
US1033358A (en) 1911-12-09 1912-07-23 John L Turner Wrench.
US1078059A (en) 1913-10-01 1913-11-11 Frank Mossberg Company Wrench.
US1261092A (en) 1914-06-18 1918-04-02 Fred R Allen Wrench.
US1157427A (en) * 1915-07-29 1915-10-19 Michael Vern Seivert Wrench.
FR498276A (en) 1919-04-12 1920-01-07 Costantino Roccati Key for mechanical parts
US1426127A (en) 1920-04-23 1922-08-15 Frank Mossberg Company Ratchet wrench
US1382492A (en) 1920-12-10 1921-06-21 Evans Lafayette Wrench
US1601767A (en) 1923-07-20 1926-10-05 Otto R Peterson Ratchet wrench
US1614039A (en) 1924-02-01 1927-01-11 Husky Wrench Company Wrench
US1639078A (en) 1925-03-14 1927-08-16 John E Coe Ratchet wrench
US1680515A (en) 1926-12-21 1928-08-14 Buda Co Ratchet mechanism for lifting jacks
US1772524A (en) 1927-04-08 1930-08-12 Snap On Wrench Company Ratchet wrench
US1733355A (en) * 1927-07-25 1929-10-29 Calvin E Morse Wrench
US1957462A (en) 1933-01-25 1934-05-08 Williams J H & Co Ratchet wrench
US2193984A (en) 1937-04-16 1940-03-19 Armstrong Bros Tool Co Reversible ratchet wrench
US2201705A (en) 1938-07-19 1940-05-21 Wright Tool And Forge Company Ratchet wrench
US2201827A (en) 1939-04-17 1940-05-21 Otto P Froeschl Ratchet mechanism
US2317461A (en) 1940-03-22 1943-04-27 Lucian C Jackson Wrench
DE921198C (en) 1944-01-04 1954-12-09 Friedrich Wilhelm Thienes Mutternschluessel with freewheel ratchet
US2542241A (en) 1946-10-23 1951-02-20 New Britain Machine Co Ratchet mechanism
US2612807A (en) 1947-11-17 1952-10-07 Ralph R Hunt Ratchet wrench spinner
US2657604A (en) 1952-09-11 1953-11-03 Sherman Klove Co Ratchet wrench
US2701977A (en) 1953-05-07 1955-02-15 Wright Tool And Forge Company Reversible ratchet wrench
US2800821A (en) 1953-10-01 1957-07-30 New Britain Machine Co Angularly adjustable, reversible ratchet wrench
US2769360A (en) 1954-09-10 1956-11-06 Cottrell Wayne Woodford Angular wrench head having upwardly opening socket
US2764048A (en) 1955-02-07 1956-09-25 Leslie V Thompson Ratchet wrench
US2803980A (en) 1955-12-27 1957-08-27 Irwin R Vogel Reversible ratchet wrench
US2978081A (en) 1956-08-13 1961-04-04 Bahco Ab Devices in ratchet wrenches
US2957377A (en) 1957-09-13 1960-10-25 Terence G Hare Reversible ratchet type wrench
US2891434A (en) 1958-04-21 1959-06-23 Lozensky Charles Andrew Ratchet wrench
DE1810811U (en) 1958-11-14 1960-05-05 Emka Metallwarenfabrik A G Wasserbehaelter plastic for hot-water geraete.
US3044591A (en) 1959-08-31 1962-07-17 Luther E Kilness Ratchet mechanism
US3019682A (en) 1960-04-08 1962-02-06 Terence G Hare Reversible ratchet type wrench
US3233481A (en) 1963-10-25 1966-02-08 Kelsey Hayes Co Ratchet wrench
US3250157A (en) 1963-11-06 1966-05-10 Snap On Tools Corp Magnetic ratchet mechanism for wrenches and the like
US3265171A (en) 1964-06-22 1966-08-09 Luther E Kilness One way reversible clutch for wrench
US3269496A (en) 1964-06-22 1966-08-30 Luther E Kilness Reversible one way clutch for wrench
US3337014A (en) 1965-10-20 1967-08-22 John A Sandrick Ratchet wrench
US3342229A (en) 1965-10-21 1967-09-19 James Igor Ratchet handle screwdriver
US3393587A (en) 1966-12-15 1968-07-23 Wright Tool And Forge Company Ratchet wrenches
US3393780A (en) 1967-01-26 1968-07-23 Luther E. Kilness Reversible ratchet
US3436992A (en) 1967-03-10 1969-04-08 Pendleton Tool Ind Inc Reversible ratchet wrench with floating pawls
US3508455A (en) 1968-02-16 1970-04-28 John F Miller Combination tool
US3606940A (en) 1969-01-11 1971-09-21 Walter Finkeldei Werkzeugfabri Ratchet switchable into opposite directions of operation
US3598001A (en) 1969-02-14 1971-08-10 Lowell Corp Reversible ratchet handle for socket wrench
US3577816A (en) 1969-04-10 1971-05-04 Jerry Alexander Ratchet wrench
US3575069A (en) 1969-07-29 1971-04-13 Kit C White Ratchet and speed wrench combination
US3713356A (en) 1971-01-18 1973-01-30 Snap On Tools Corp Socket release mechanism for wrenches and the like
US3691876A (en) 1971-02-08 1972-09-19 Leon Cassidy Jr Ratchet spinner wrench
US3908487A (en) 1971-09-10 1975-09-30 Stanley Works Rotary hand tool
US3742788A (en) 1972-07-20 1973-07-03 Parker Mfg Co Ratchet wrench
US3783703B1 (en) 1972-11-17 1989-09-26
US3783703A (en) 1972-11-17 1974-01-08 Jo Line Tools Ratchet mechanism
US3838614A (en) * 1972-12-12 1974-10-01 Donnell W O Reciprocating engine barring tool
US3970155A (en) 1974-01-14 1976-07-20 Jo-Line Tools, Inc. Electronic torque wrench
US3866492A (en) 1974-03-06 1975-02-18 Jo Line Tools Torque multiplier
US4053037A (en) 1976-06-10 1977-10-11 Jo-Line Tools, Inc. Reversing ratchet
US4111077A (en) 1977-02-02 1978-09-05 Lowell Corporation Ratchet wrench
US4070932A (en) 1977-03-01 1978-01-31 Jeannotte Richard W Extensible handle for a tool headpiece
GB1559093A (en) 1977-04-07 1980-01-16 Gordon Tools Ltd Ratchet drivers
US4128025A (en) 1977-08-08 1978-12-05 Main Harvey M Bolt starting device
US4147076A (en) 1977-10-31 1979-04-03 The Wright Tool And Forge Company Reversing-ratchet socket wrench
US4257507A (en) 1978-08-15 1981-03-24 Jo-Line Tools, Inc. Torque wrench with pawl guide
US4277989A (en) 1979-05-01 1981-07-14 Tracy Kurt L Ratchet wrench handle
US4308768A (en) 1979-05-10 1982-01-05 Rems-Werk Christian Foll Und Sohne Gmbh & Co. Ratchet lever
US4274311A (en) 1979-07-23 1981-06-23 Emil Ebert Ratchet wrench handle
US4277990A (en) 1979-11-14 1981-07-14 Duro Metal Products Company Ratchet wrench
US4328720A (en) 1980-03-17 1982-05-11 Shiel Walter P Socket wrench and set
US4308769A (en) 1980-06-02 1982-01-05 Bertha Rantanen Reversing ratcheting wrench
US4336728A (en) 1980-10-08 1982-06-29 Deibert Raymond L Push-button reversible ratchet and pawl socket wrench handle
US4515044A (en) * 1980-10-23 1985-05-07 Harstad Larry V Quick change ratchet wrench
US4406186A (en) 1981-05-29 1983-09-27 Gummow Stephen A Dual action ratchet wrench
US4420995A (en) 1981-06-05 1983-12-20 Roberts Peter M Quick-release and positive locking mechanism for use on socket wrenches and on power and impact tools
US4488460A (en) 1982-07-28 1984-12-18 Easco Corporation Ergonomic handle for hand tool
US4520697A (en) 1982-09-29 1985-06-04 Moetteli John B Ratchet wrench
US4485700A (en) 1983-01-26 1984-12-04 Colvin David S Reversible ratchet wrench
US4631988A (en) 1983-01-26 1986-12-30 Colvin David S Reversible ratchet wrench including detent mechanism
GB2135226A (en) 1983-02-16 1984-08-30 Britool Ltd Ratchet wrench
US5000066A (en) 1983-07-05 1991-03-19 Gentiluomo Paul A Ratchet wrench
US4709600A (en) 1984-02-28 1987-12-01 Applied Power, Inc. Power screw driver with a ratchet wheel having finely graduated toothing
US4512218A (en) 1984-03-19 1985-04-23 Chow Kirk K Control bar for ratchet wrench
US4770072A (en) 1985-01-07 1988-09-13 Eduard Wille Gmbh & Co. Reversible ratchet wrench
US4631990A (en) * 1985-08-02 1986-12-30 Hughes Matthew E Open-ended ratchet wrench
US4662251A (en) 1985-10-08 1987-05-05 Kohal Lester L Orthogonal adjustable socket wrench
US4777852A (en) 1986-10-02 1988-10-18 Snap-On Tools Corporation Ratcheting screwdriver
US4807500A (en) 1986-11-14 1989-02-28 Main Harvey M Reversing ratchet mechanism for tools
US4722253A (en) 1987-01-21 1988-02-02 Jessie Chow Reversible ratchet wrench with one-hand accessible switch
US4762033A (en) 1987-02-24 1988-08-09 National Hand Tool Corporation Ratchet wrench with manual disassembly capability
US4722252A (en) 1987-03-02 1988-02-02 Fulcher William A Power driven wrench
US5038452A (en) 1988-01-28 1991-08-13 Latshaw Enterprises, Inc. Method of assembling an improved ratcheting tool driver
US4869138A (en) 1988-02-08 1989-09-26 Farris Jim L New and improved ratchet tool with rotatable rotor lock and rigid shifter finger
US4796492A (en) 1988-05-20 1989-01-10 Liou Mou Tang Clutch type socket wrench
US4903554A (en) 1988-06-02 1990-02-27 Colvin David S Reversible ratchet wrench with thin head construction
US4862775A (en) 1988-10-19 1989-09-05 Jessie Chow Control device for ratchet wrenches
US4924737A (en) 1989-03-20 1990-05-15 Gummow Tool Company Positive drive ratchet
US4934220A (en) 1989-04-03 1990-06-19 Snap-On Tools Corporation Sealed reversible ratchet wrench
US4986147A (en) 1989-07-20 1991-01-22 National Hand Tool Corporation Ratchet wrench having an internally reinforced handle
US5076121A (en) 1989-07-28 1991-12-31 Gregory Fosella Adjustable ratchet wrench
US5448931A (en) 1989-07-28 1995-09-12 Great Bay Tool Corp. Adjustable wrench
US5012705A (en) 1990-03-16 1991-05-07 National Hand Tool Corporation Ratchet wrench with manually removable core
US4991468A (en) 1990-08-10 1991-02-12 Lee Clark J Barrel type sockets
US5231903A (en) 1990-12-20 1993-08-03 Hi-Shear Corporation Reversible ratchet wrench
US5095781A (en) 1991-01-18 1992-03-17 Stanley-Parker, Inc. Ratchet spinner
US5230262A (en) 1991-03-27 1993-07-27 Ab Sandvik Bahco Ratchet wrench
US5178047A (en) 1991-08-08 1993-01-12 Easco Hand Tools, Inc. Reversible ratchet wrench
US5233891A (en) 1991-09-06 1993-08-10 Easco Hand Tools, Inc. Detent means
US5199330A (en) 1991-10-01 1993-04-06 Easco Hand Tools, Inc. Reversing ratchet wrench
US5157994A (en) 1991-12-13 1992-10-27 Snap-On Tools Corporation Ratchet wrench with lost motion reversing mechanism
US5626062A (en) 1992-01-16 1997-05-06 Colvin; David S. Socket and ratchet wrench
US5144869A (en) 1992-03-09 1992-09-08 Jessie Chow Control device for ratchet wrenches
US5467672A (en) 1992-04-20 1995-11-21 Ashby; Earl T. Open end ratchet wrench
US5501124A (en) 1992-04-20 1996-03-26 Ashby; Earl T. Open end ratchet wrench
US5199335A (en) 1992-05-11 1993-04-06 Easco Hand Tools, Inc. Flex-head tool with locking feature
US5271300A (en) 1992-07-14 1993-12-21 Snap-On Tools Corporation Composite hand tool
US5404773A (en) 1992-08-10 1995-04-11 Norville; Burl O. Cam-action ratchet-type wrench
US5509333A (en) 1993-01-28 1996-04-23 Rion; John D. Low profile ratchet adapter
US5392672A (en) 1993-03-09 1995-02-28 Larry R. Larson Ratchet wrench
US5347892A (en) 1993-03-11 1994-09-20 Moetteli John B Socket retainer for thin-wall drive member
US5295422A (en) 1993-04-23 1994-03-22 Jessie Chow Wrench having a greater driving strength
US5584220A (en) 1994-03-01 1996-12-17 Darrah; Scott A. Angle attachment tool
US5425291A (en) 1994-04-05 1995-06-20 Chang; Sheue Z. Unidirectional driving head assembly
US5499560A (en) 1994-05-20 1996-03-19 Aeschliman; William M. Universal open ended socket wrench
US5495783A (en) 1994-07-08 1996-03-05 Snap-On Incorporated Reversible ratchet wrench with direction indicia
US5887493A (en) 1994-07-14 1999-03-30 Main; Harvey M. Ratchet wrench
US5582081A (en) 1994-08-23 1996-12-10 Lin; Ching-Chou Reversible screwdriver
US5477757A (en) 1994-09-06 1995-12-26 Maresh; Joseph D. Ergonomic ratchet wrench
US5595095A (en) 1994-10-13 1997-01-21 Hillinger; George Ratcheting socket wrench with intermeshing gears
US5522288A (en) 1994-12-09 1996-06-04 Snap-On Incorporated Reversible ratchet wrench
US5535646A (en) 1995-02-07 1996-07-16 Stanley Mechanics Tools, Inc. Ratchet drive
US5533427A (en) * 1995-03-27 1996-07-09 Chow; Jessie Ratchet wrench having ratchet teeth of higher strength
US5709137A (en) 1995-04-24 1998-01-20 Blacklock; Gordon D. Torque clutched reversible ratchet wrench
US5996453A (en) 1995-04-24 1999-12-07 Hand Tool Design Corporation Ratchet mechanism which resists spontaneous disengagement for use in wrenches and other tools
US5626061A (en) 1995-07-13 1997-05-06 Stanley Mechanics Tools Composite ratchet
US5557994A (en) 1995-07-17 1996-09-24 Nakayama; Tatsuo Ratchet handle with torque adjustment
US5622089A (en) 1995-12-14 1997-04-22 Gifford, Sr.; Robert W. Ratchet wrench with thumb activated direction control switch
US6332382B1 (en) 1996-02-05 2001-12-25 Wayne Anderson Tool with polygonal head for interchangeable bits
US5669875A (en) 1996-04-16 1997-09-23 United States Surgical Corporation Endoscopic surgical apparatus with longitudinal actuation
US5878635A (en) 1996-04-16 1999-03-09 Hsieh; Chih-Ching Reversible ratchet wrench
US5749272A (en) 1996-04-24 1998-05-12 Phan; Tan Thanh Ratchet screw driver
US5636557A (en) 1996-05-24 1997-06-10 Ma; Nai-Lin Ratchet type ring spanner
US5806383A (en) * 1996-11-07 1998-09-15 Hsieh; Chih-Ching Crescent wrench
US5782147A (en) 1996-11-21 1998-07-21 Hand Tool Design Corporation Ratchet wrench having two-pawl action
US5794496A (en) 1996-12-05 1998-08-18 Hand Tool Design Corporation Pawl module for ratchet wrench
US6161454A (en) 1996-12-18 2000-12-19 Hand Tool Design Corporation Low cost ratchet wrench and method of assembly
US5857390A (en) 1996-12-24 1999-01-12 Whiteford; Carlton L. Reversible ratchet wrench including thin-walled sockets
US5842391A (en) 1997-03-07 1998-12-01 Chaconas; Peter Constantine Wrench with ratcheting action
US5873286A (en) 1997-04-08 1999-02-23 Hand Tool Design Corporation Flex pawl
US5911798A (en) 1997-04-09 1999-06-15 Hand Tool Design Corporation Handle extension for ratchet wrench
US5884538A (en) 1997-06-13 1999-03-23 Hand Tool Design Corporation Detent for a hand tool
US5884537A (en) 1997-06-20 1999-03-23 Chen; Chun Chiung Ratchet tool
US5910197A (en) 1997-07-30 1999-06-08 Hand Tool Design Corporation Wrench with supplementary driving lugs formed on its square cross-sectioned drive tang and interchangeable sockets therefor
US5901620A (en) 1997-07-31 1999-05-11 Hand Tool Design Corporation Sockets for a ratchet wrench
US5829326A (en) 1997-09-04 1998-11-03 Hand Tool Design Corporation Cover plate for a ratchet wrench
US5913954A (en) 1997-09-12 1999-06-22 Hand Tool Design Corporation Pawl for a low profile wrench
US5957009A (en) 1997-10-16 1999-09-28 Mccann; Frank Control mechanism for ratchet wrench
US5946987A (en) 1997-11-07 1999-09-07 Wei; Hung-Yin Offset ratchet wrench
US5979274A (en) * 1998-01-07 1999-11-09 Hsieh; Chih-Ching Ratchet wheel mounting arrangement of a wrench
US6257096B1 (en) 1998-01-30 2001-07-10 David Ling Socket adaptor for ratchet
US5970552A (en) 1998-02-03 1999-10-26 Hand Tool Design Corporation Scaffold prybar ratchet
US5927158A (en) 1998-03-16 1999-07-27 Lin; Yuan-Ho Combination ratchet wrench
US6000302A (en) 1998-04-07 1999-12-14 Chiang; Der Ching Tool having rotatable driving head
US6152826A (en) 1998-04-29 2000-11-28 Hand Tool Design Corporation Impact universal joint
US6006631A (en) 1998-05-20 1999-12-28 Miner; Montie H. Through-hole quick release adapters
US5946989A (en) 1998-06-15 1999-09-07 Hsieh; Chih-Ching Box end for a box end wrench
US6164167A (en) 1998-06-22 2000-12-26 Chen; Yu-Tang Ratchet wrench having gear driven pawl
US5964129A (en) 1998-08-04 1999-10-12 Shiao; Hsuan-Sen Ratchet wrench with a direction control ratchet member
US6205889B1 (en) 1998-08-19 2001-03-27 Chih-Ching Hsieh Ratchet socket wrench
US6065374A (en) 1998-09-16 2000-05-23 Hand Tool Design Corporation Slider pawl
US6134991A (en) 1999-03-04 2000-10-24 Hand Tool Design Corporation Pawl for ratchet wrench
US6125722A (en) 1999-03-18 2000-10-03 Snap-On Tools Company Ratchet wrench with sealed reversing lever
US6044731A (en) 1999-03-25 2000-04-04 Hsieh; Chih-Ching Double-reversible ratchet wrench
US6240813B1 (en) 1999-07-07 2001-06-05 Hand Tool Design Corporation Drive socket
US6230591B1 (en) 1999-07-30 2001-05-15 Hand Tool Design Corporation Reversible ratcheting tool with improved gear wheel/pawl engagement
US6301998B1 (en) 1999-08-03 2001-10-16 Bobby Hu Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and socket wrench with such ratchet wheel
US6134990A (en) 1999-08-05 2000-10-24 Hand Tool Design Corporation Ratcheting tool with improved gear wheel/pawl engagement
USD434292S (en) 1999-08-20 2000-11-28 Wrench
US6155140A (en) 1999-09-09 2000-12-05 Tsai; Tzen Chang Ratchet wrench
US6216567B1 (en) 1999-11-05 2001-04-17 Bobby Hu Ratcheting tools having an angle-adjustable head
US6220123B1 (en) 1999-11-30 2001-04-24 Yu-Tang Chen Structure of a ratchet wrench
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
US6260448B1 (en) 1999-12-21 2001-07-17 Hand Tool Design Corporation Top load ratchet wrench
US20020194950A1 (en) 2000-01-11 2002-12-26 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6263767B1 (en) 2000-01-19 2001-07-24 Hi-Five Products Developing Co., Ltd. Pawl for a ratchet-type spanner
US6260449B1 (en) 2000-01-24 2001-07-17 Liao I-He Ratchet tool
USD433896S (en) 2000-01-28 2000-11-21 Wrench
US20020023520A1 (en) 2000-02-03 2002-02-28 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6282991B1 (en) 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6282992B1 (en) 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US20020166417A1 (en) 2000-03-13 2002-11-14 Bobby Hu Reversible ratcheting tool with a smaller head
US6209423B1 (en) 2000-03-30 2001-04-03 Hsuan-Sen Shiao Ratchet spanner
US20030010159A1 (en) 2000-04-03 2003-01-16 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6216563B1 (en) 2000-04-10 2001-04-17 Chih-Ching Hsieh Reversible ratchet wheel positioning arrangement for a reversible ratchet socket wrench
US6334373B1 (en) 2000-04-18 2002-01-01 Chih-Ching Hsieh Ratchet wrench stop member positioning arrangement
US6282993B1 (en) 2000-06-19 2001-09-04 Tseng Shu-Ying Ratchet mechanism for a ratchet tool
US20030121373A1 (en) 2000-06-22 2003-07-03 David Ling Spanner with prevention of disengagement of fasteners
US6488136B2 (en) * 2000-06-26 2002-12-03 Chih-Ming Chang Ratchet wheel structure of ratcheting wrench
US6453779B2 (en) 2000-07-21 2002-09-24 Bobby Hu Positioning device for a switch member of a reversible ratchet-type wrench
US6457389B1 (en) 2000-08-22 2002-10-01 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6666112B2 (en) 2000-09-01 2003-12-23 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6257097B1 (en) 2000-09-27 2001-07-10 Liao I-He Ratchet tool having an eccentric rotator
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
US6308594B1 (en) 2000-12-28 2001-10-30 Chin-Shun Cheng Ratchet wrench structure
US6629477B2 (en) 2001-01-11 2003-10-07 Hand Tool Design Corporation Reversible ratchet wrench with high torsion
US6591717B2 (en) 2001-01-22 2003-07-15 Hung Yin Wei Plum blossom-shaped ratchet wrench structure
US6457388B1 (en) 2001-01-25 2002-10-01 Ching Chen Control member for ratchet wrench
US6732614B2 (en) 2001-02-19 2004-05-11 Bobby Hu Easy-to-manufacture and easy-to-assemble ratcheting-type wrench
US6386072B1 (en) 2001-03-21 2002-05-14 Chi Yuan-Chin Ratchet tool
US6382052B1 (en) 2001-04-02 2002-05-07 Shwu Ruu Chen Ratchet tool
US6435063B1 (en) 2001-04-30 2002-08-20 Ching Chen Box end wrench
US20020162424A1 (en) 2001-05-07 2002-11-07 Bobby Hu Wrench with a simplified structure
US20020162423A1 (en) 2001-05-07 2002-11-07 Bobby Hu Wrench with a simplified structure
US20020166418A1 (en) 2001-05-11 2002-11-14 Hsieh Shih Kuei Wrench capable of avoiding detachment of a screw-thread member
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
US6435062B1 (en) 2001-07-05 2002-08-20 The Stanley Works Ratchet wrench having easily assembling structure
US6662693B2 (en) 2001-07-13 2003-12-16 Bobby Hu Wrench with a fixed maximum operational torque
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
US6450068B1 (en) 2001-07-13 2002-09-17 Bobby Hu Ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6758641B2 (en) 2001-07-13 2004-07-06 Bobby Hu Method for manufacturing a ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6516691B1 (en) 2001-07-27 2003-02-11 Hung Yin Wei Racheting tool with a tapered spring positioning member
US6647832B2 (en) 2001-07-27 2003-11-18 Bobby Hu Wrench having two rigid supporting areas for a pawl
US6427560B1 (en) 2001-08-17 2002-08-06 Hang Haw Shea Screwdriver device
US6382051B1 (en) 2001-09-05 2002-05-07 Chih-Min Chang Ratchet wrench
US6539825B1 (en) 2001-09-20 2003-04-01 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US20030070512A1 (en) 2001-10-17 2003-04-17 Bobby Hu Reversible ratchet-type wrench
US6450066B1 (en) 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
US6520051B1 (en) 2001-12-27 2003-02-18 Bobby Hu Head of a wrench handle
US6644148B2 (en) 2002-02-08 2003-11-11 Bobby Hu Reversible ratchet-type wrench
US20030154826A1 (en) 2002-02-21 2003-08-21 Daniel Lee Connector structure of a ratchet wrench
US6748825B2 (en) 2002-04-22 2004-06-15 Yung-Chung Hsu One-way wrench
US20030196522A1 (en) 2002-04-22 2003-10-23 Bobby Hu Reversible ratchet type wrench
US20040093995A1 (en) 2002-07-22 2004-05-20 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US6688195B1 (en) 2002-08-07 2004-02-10 Chih-Ching Hsien Bi-directional ratchet wrench
US6708586B1 (en) 2002-10-15 2004-03-23 Yu Tang Chen Ratchet wrench having a direction controller that is assembled easily
US6761092B2 (en) 2002-11-07 2004-07-13 Chih-Ching Hsien Metal piece attraction device on ratchet tool

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
Amended Complaint for Declatory Judgment of Noninfringement, Unenforceability, and Invalidity of a Patent, dated Sep. 19, 2003.
Complaint for Declatory Judgment of Noninfringement, Unenforceability, and Invalidity of a Patent, dated Sep. 26, 2002.
EPO Search Report for Appln. No. EP 00 12 6902 dated Feb. 17, 2003 (3p.) 0570.
Plaintiff's Second Supplemental Response to Interrogatory No. 3 of Defendant's First Set of Interrogatories, dated Apr. 21, 2004.
Tool and Manufacturing Engineers Handbook, 1976, 3rd Edition, pp. 6-48.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170120425A1 (en) * 2015-11-01 2017-05-04 Li-Ching Lin Ratchet wrench with restriction member for retricting movement of pawl
US9868189B2 (en) * 2015-11-01 2018-01-16 Li-Ching Lin Ratchet wrench with restriction member for restricting movement of pawl

Also Published As

Publication number Publication date Type
US6301998B1 (en) 2001-10-16 grant
US6148695A (en) 2000-11-21 grant
EP1074348A3 (en) 2001-05-23 application
EP1074348A2 (en) 2001-02-07 application
CA2313397A1 (en) 2001-02-03 application

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