US2657604A - Ratchet wrench - Google Patents

Ratchet wrench Download PDF

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Publication number
US2657604A
US2657604A US308977A US30897752A US2657604A US 2657604 A US2657604 A US 2657604A US 308977 A US308977 A US 308977A US 30897752 A US30897752 A US 30897752A US 2657604 A US2657604 A US 2657604A
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US
United States
Prior art keywords
pawl
driven member
spring
teeth
lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US308977A
Inventor
Theodore O Rueb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHERMAN KLOVE CO
SHERMAN-KLOVE Co
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SHERMAN KLOVE CO
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Application filed by SHERMAN KLOVE CO filed Critical SHERMAN KLOVE CO
Priority to US308977A priority Critical patent/US2657604A/en
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Publication of US2657604A publication Critical patent/US2657604A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; 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
    • B25B13/465—Spanners; 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 internally toothed ring

Definitions

  • This invention relates to manually operable tools having handles for operating rotatable heads or driven members by means of ratchet and pawl mechanism constructed so that the rmovement of the driven member may be reversed or rotated in either direction by the vibrating movement of the handle. While my improved tool may be used for any suitable purposes, it is particularly intended for ratchet wrenches. The objects of this invention are to improve such wrenches generally and more particularly to provide parts which may be made in auto matic machines whereby the cost of manufacture is reduced and the complete wrench will be particularly strong and lasting in use.
  • Fig. 1 is a sectional plan view taken substantially on theline I.-I of Fig. 2.
  • Fig. 2 is a longitudinal sectional view.
  • Fig. 3 is a sectional view taken on the line Fig. 4 is a detail similar to Fig. 1 showing vthe pawl in reverse position;
  • Fig. 5 is a side View of the driven member.
  • the wrench f5 has a barrel or cylindrical head l provided with a handle 8 which may be formed integrally therewith or secured thereto in any desired manner.
  • the barrel is provided interiorly with ratchet teeth 9 which are engaged by the teeth IG and II on the opposite ends or branches of a pawl I2 mounted in the driven member I3.
  • This member fits in the central bore of the barrel I and is held therein at one end by an annular flange Iii extending inwardly from the outer periphery of the barrel.
  • the driven member is removably held in operative position by means of a spring ring I5 which iits in grooves in the respective members in the usual manner.
  • the driven member is provided with a projection I6 of the type commonly used for engagement with sockets or the like, or other tools to be actuated.
  • the driven member i3 has a transverse slot or opening Il therein which divides the same into a lower annular portion I8 and an upper annular portion I9 which are connected by an integrally formed eccentric post or bearing 20 which serves las a bearing or support for the pawl I2 which has .a circular recess 2l which fits against the post as best shown in Fig. 3.
  • ri'he pawl l2 is of generally triangular shape with the bearing at one .side and the toothed projections at the opposite apexes, the arrangement being such that when the pawl is turned in one direction, the teeth l l will engage with the teeth 9 of the barrel and when the pawl is swung to its opposite position, the teeth Ill will engage with the teeth of the barrel.
  • the pawl is reversed by means of a button or thumbpiece 22 which extends outwardly through the opening in the end of the barrel and is held in position by means of a flange 23 which lits under the ange lf3 of the barrel.
  • the outwardly projecting portion may be tapered and knurled for convenience in operation.
  • the 1lange ⁇ 23 engages with an annular shouldered recess 24 in the end of the driven member i3 so that it is rotatably held in operative position.
  • the pawl I2 is provided with a pin 25 which Iextends through an opening 26 in the upper iiange or section I9 of the driven member and engages with a hole 2i in one end of an overthrow operating or reversing lever 23 which is mounted in an annular recess 29 in the driven member I3 and which is pivoted at 35 to the driven member adjacent to its curved end as shown in Figs. 2 and 4.
  • the disc or thumbpiece 22 has a socket recess 3
  • the thumbpiece has a downwardly extending pin or projection 32 which engages with the eye 33 at one end of an overthrow spring Sli of a peculiar shape best shown in Fig. 4.
  • This spring has an outwardly curved portion 35 which rides or slides on the inside of the wall of the recess 29 and has an inwardly extending reversely curved end 36 which presses against the curved end of the reversing lever 28.
  • the driven member By constructing the driven member in the manner shown and described, it may be made on a suitable machine tool substantially in one operation so that the cost of the same will be greatly reduced and at the same time the integrally formed post makes a rigid and substantial construction and base for the pawl i2.
  • a manually operable ratchet tool including a barrel having interior ratchet teeth, a driven member rotatably mounted in the barrel having a transverse slot dividing the same into two end portions, an eccentrically positioned bearing post in the slot connecting the two end portions, a pawl pivotally engaging said post and having oppositely disposed toothed projections for engagement with the teeth in the barrel, an overthrow lever pivotally mounted in the barrel with its free end in engagement with the pawl for swinging the pawl, a curved spring slidably mounted in the barrel and engaging With the inner wall thereof, one end of said spring being adapted to engage with the end of the lever to throw it to adjusted positions, a disc rotatably mounted in the barrel, and a pin projecting from the disc and engaging with the spring for sliding the spring.
  • a ratchet device the combination of a cylindrical head having internal peripheral teeth and having an inwardly extending flange at one end, a driven member rotatably mounted in the head and having Work-engaging means, said driven member having a transverse slot dividing the same into end portions, an eccentrically positioned integrally formed pivot in the slot extending between the end portions, a double ended pawl having its bearing on said pivot and adapted to coact with the teeth in the head for reversing the movement of the driven member, a pin projecting from the pawl through an opening in one oi the end portions, a sectoral shaped lever, a pin extending upwardly from the driven member through the curved end of the lever and forming a bearing therefor, the opposite end of the lever having a hole engaging with the pin in the pawl, a curved spring slidably mounted in the driven member which engages with the inner Wall of the driven member, a thumbpiece rotatably mounted in the driven member having a recess for receiving the
  • a ratchet Wrench comprising a driving member, a driven member rotatably mounted in the driving member, and having a transverse slot therein, a double ended pawl pivotally mounted in the slot and having teeth in the opposite ends, an annular series of teeth in the driving member for engagement with the respective ends of the pawl, an annular recess in the end of the driven member a pin extending through an opening in the driving member into said recess, a sectoral lever having one end engaging With said pin, a pivot post extending from the driven member through an opening in the curved end of the sectoral lever, a at spring mounted in the recess and engaging with the inner wall of the driven member, one end of the spring having an eye therein and the other end being curved for engagement with the curved end of the lever for swinging the lever when the spring is moved, a thumbpiece rotatably mounted in the driving and the driven members, a pin on the thumbpiece engaging with the eye in the spring and having a recess tting over the pivot pin to
  • a cylindrical driven member having a transverse slot therein dividing the same into end sections and having an integrally formed bearing post extending through the slot and connecting Said end secions.

Description

Nov. 3; 1953 T. o. RUEB RATCHET WRENCH Filed Sept. 1l, 1952 Patented Nov. 3, 1953 RATCHET WRENCH v Theodore O. Rueb, Chicago, Ill., assignor to The Sherman-Klove Co., Chicago, Ill., a corporation of Delaware Application September 11, 1952, Serial No. 308,977
4 Claims. (Cl. 81-63.2)
This invention relates to manually operable tools having handles for operating rotatable heads or driven members by means of ratchet and pawl mechanism constructed so that the rmovement of the driven member may be reversed or rotated in either direction by the vibrating movement of the handle. While my improved tool may be used for any suitable purposes, it is particularly intended for ratchet wrenches. The objects of this invention are to improve such wrenches generally and more particularly to provide parts which may be made in auto matic machines whereby the cost of manufacture is reduced and the complete wrench will be particularly strong and lasting in use.
Other objects are to provide simple and enicient means for. reversing the pawl; to provide a pawl reversing mechanism 'having an overthrow spring with means for actuating the same to cause the pawl .to be reversed.
Other objects and advantages will appear more fully from the following description taken in connection with the accompanying drawings in which,
Fig. 1 is a sectional plan view taken substantially on theline I.-I of Fig. 2.
Fig. 2 is a longitudinal sectional view.
Fig. 3 is a sectional view taken on the line Fig. 4 is a detail similar to Fig. 1 showing vthe pawl in reverse position; and
Fig. 5 is a side View of the driven member.
The wrench f5 has a barrel or cylindrical head l provided with a handle 8 which may be formed integrally therewith or secured thereto in any desired manner. The barrel is provided interiorly with ratchet teeth 9 which are engaged by the teeth IG and II on the opposite ends or branches of a pawl I2 mounted in the driven member I3. This member fits in the central bore of the barrel I and is held therein at one end by an annular flange Iii extending inwardly from the outer periphery of the barrel. The driven member is removably held in operative position by means of a spring ring I5 which iits in grooves in the respective members in the usual manner. The driven member is provided with a projection I6 of the type commonly used for engagement with sockets or the like, or other tools to be actuated.
The driven member i3 has a transverse slot or opening Il therein which divides the same into a lower annular portion I8 and an upper annular portion I9 which are connected by an integrally formed eccentric post or bearing 20 which serves las a bearing or support for the pawl I2 which has .a circular recess 2l which fits against the post as best shown in Fig. 3. ri'he pawl l2 is of generally triangular shape with the bearing at one .side and the toothed projections at the opposite apexes, the arrangement being such that when the pawl is turned in one direction, the teeth l l will engage with the teeth 9 of the barrel and when the pawl is swung to its opposite position, the teeth Ill will engage with the teeth of the barrel.
The pawl is reversed by means of a button or thumbpiece 22 which extends outwardly through the opening in the end of the barrel and is held in position by means of a flange 23 which lits under the ange lf3 of the barrel. The outwardly projecting portion may be tapered and knurled for convenience in operation. The 1lange`23 engages with an annular shouldered recess 24 in the end of the driven member i3 so that it is rotatably held in operative position.
The pawl I2 is provided with a pin 25 which Iextends through an opening 26 in the upper iiange or section I9 of the driven member and engages with a hole 2i in one end of an overthrow operating or reversing lever 23 which is mounted in an annular recess 29 in the driven member I3 and which is pivoted at 35 to the driven member adjacent to its curved end as shown in Figs. 2 and 4.
The disc or thumbpiece 22 has a socket recess 3| for receiving the upwardly extending end of the pivot 3) which serves to limit the rotating movement of the thumbpiece. The thumbpiece has a downwardly extending pin or projection 32 which engages with the eye 33 at one end of an overthrow spring Sli of a peculiar shape best shown in Fig. 4. This spring has an outwardly curved portion 35 which rides or slides on the inside of the wall of the recess 29 and has an inwardly extending reversely curved end 36 which presses against the curved end of the reversing lever 28. it will be seen that when the spring is rotated by means of the pin 32 in the button or thumbpiece 22, to the position shown in Fig. l, its curved end will press against one side of the reversing lever and cause the free end to swing to the position to cause the teeth Il to operatively engage with the teeth of the driving member as shown in Fig. 3. When the button or thumbpiece is rotated clockwise as shown in Fig. 4, the curved end 36 of the spring will go past the dead center and press against the opposite side of the lever and cause it to swing the pawl so that the teeth Il) will operatively engage with the teeth in the driving member.
By constructing the driven member in the manner shown and described, it may be made on a suitable machine tool substantially in one operation so that the cost of the same will be greatly reduced and at the same time the integrally formed post makes a rigid and substantial construction and base for the pawl i2.
What I claim is:
1. A manually operable ratchet tool including a barrel having interior ratchet teeth, a driven member rotatably mounted in the barrel having a transverse slot dividing the same into two end portions, an eccentrically positioned bearing post in the slot connecting the two end portions, a pawl pivotally engaging said post and having oppositely disposed toothed projections for engagement with the teeth in the barrel, an overthrow lever pivotally mounted in the barrel with its free end in engagement with the pawl for swinging the pawl, a curved spring slidably mounted in the barrel and engaging With the inner wall thereof, one end of said spring being adapted to engage with the end of the lever to throw it to adjusted positions, a disc rotatably mounted in the barrel, and a pin projecting from the disc and engaging with the spring for sliding the spring.
2. In a ratchet device, the combination of a cylindrical head having internal peripheral teeth and having an inwardly extending flange at one end, a driven member rotatably mounted in the head and having Work-engaging means, said driven member having a transverse slot dividing the same into end portions, an eccentrically positioned integrally formed pivot in the slot extending between the end portions, a double ended pawl having its bearing on said pivot and adapted to coact with the teeth in the head for reversing the movement of the driven member, a pin projecting from the pawl through an opening in one oi the end portions, a sectoral shaped lever, a pin extending upwardly from the driven member through the curved end of the lever and forming a bearing therefor, the opposite end of the lever having a hole engaging with the pin in the pawl, a curved spring slidably mounted in the driven member which engages with the inner Wall of the driven member, a thumbpiece rotatably mounted in the driven member having a recess for receiving the pivot pin and limiting the movement of the disc, said disc having a pin projecting into an eye in the spring for sliding the same, said spring having a curved portion engaging with the curved portion of the lever for throwing the lever into opposite engaging positions.
3. A ratchet Wrench comprising a driving member, a driven member rotatably mounted in the driving member, and having a transverse slot therein, a double ended pawl pivotally mounted in the slot and having teeth in the opposite ends, an annular series of teeth in the driving member for engagement with the respective ends of the pawl, an annular recess in the end of the driven member a pin extending through an opening in the driving member into said recess, a sectoral lever having one end engaging With said pin, a pivot post extending from the driven member through an opening in the curved end of the sectoral lever, a at spring mounted in the recess and engaging with the inner wall of the driven member, one end of the spring having an eye therein and the other end being curved for engagement with the curved end of the lever for swinging the lever when the spring is moved, a thumbpiece rotatably mounted in the driving and the driven members, a pin on the thumbpiece engaging with the eye in the spring and having a recess tting over the pivot pin to limit the rotating movement of the thumbpiece.
4. In a device as per claim 3, a cylindrical driven member having a transverse slot therein dividing the same into end sections and having an integrally formed bearing post extending through the slot and connecting Said end secions.
THEODORE O. RUEB.
References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,155,268 Pettigrove Sept. 28, 1915 1,243,300 Jacoby Oct. 16, 1917 1,418,816 McCoy June 6, 1922 1,635,102 Watson July 5, 1927 1,854,513 Hummel Apr. 19, 1932 1,868,839 McNaught et al. July 26, 1932 2,427,153 Mossberg Sept. 9, 1947 FOREIGN PATENTS Number Country Date 1,005,095 France Dec. 12, 1951
US308977A 1952-09-11 1952-09-11 Ratchet wrench Expired - Lifetime US2657604A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966814A (en) * 1956-11-15 1961-01-03 Mueller Co Drilling machine
US3369416A (en) * 1960-09-26 1968-02-20 Luther E. Kilness Ratchet mechanism
US4924737A (en) * 1989-03-20 1990-05-15 Gummow Tool Company Positive drive ratchet
US4993288A (en) * 1986-06-28 1991-02-19 Circle A Products, Inc. Power driven replacement socket ratchet wrench
US6282992B1 (en) * 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6450066B1 (en) 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
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
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
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
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
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
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
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
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
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
US6807882B2 (en) 2001-05-07 2004-10-26 Bobby Hu Wrench with a simplified structure
US6945141B2 (en) 2002-04-22 2005-09-20 Bobby Hu Reversible ratchet type wrench
US6955104B2 (en) 2000-03-13 2005-10-18 Bobby Hu Reversible ratcheting tool with a smaller head
US6971286B2 (en) 2002-07-22 2005-12-06 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US7017453B2 (en) 2001-10-17 2006-03-28 Bobby Hu Reversible ratchet-type wrench
US7178429B2 (en) 2002-08-05 2007-02-20 Yen-Wen Lin Easy-to-assemble ratcheting tool
USRE43286E1 (en) 1999-08-03 2012-04-03 Bobby Hu 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
US20140260819A1 (en) * 2013-03-14 2014-09-18 Stephen A. Gummow Hand tool with stepless locking mechanism

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1155268A (en) * 1915-06-18 1915-09-28 Carl W Pettigrove Key.
US1243300A (en) * 1917-06-13 1917-10-16 Automatic Tool Supply Co Wrench.
US1418816A (en) * 1921-03-31 1922-06-06 Charles C Mccoy Automatic pipe wrench
US1635102A (en) * 1926-06-21 1927-07-05 Leonard E Watson Wrench
US1854513A (en) * 1930-03-29 1932-04-19 Snap On Tools Inc Reversible ratchet wrench
US1868839A (en) * 1930-07-03 1932-07-26 Duro Metal Prod Co Ratchet lever
US2427153A (en) * 1943-05-15 1947-09-09 Mossberg Frank Yielding ratchet torque wrench
FR1005095A (en) * 1947-06-03 1952-04-07 Lauravia Ratchet handle for tightening wrench

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1155268A (en) * 1915-06-18 1915-09-28 Carl W Pettigrove Key.
US1243300A (en) * 1917-06-13 1917-10-16 Automatic Tool Supply Co Wrench.
US1418816A (en) * 1921-03-31 1922-06-06 Charles C Mccoy Automatic pipe wrench
US1635102A (en) * 1926-06-21 1927-07-05 Leonard E Watson Wrench
US1854513A (en) * 1930-03-29 1932-04-19 Snap On Tools Inc Reversible ratchet wrench
US1868839A (en) * 1930-07-03 1932-07-26 Duro Metal Prod Co Ratchet lever
US2427153A (en) * 1943-05-15 1947-09-09 Mossberg Frank Yielding ratchet torque wrench
FR1005095A (en) * 1947-06-03 1952-04-07 Lauravia Ratchet handle for tightening wrench

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966814A (en) * 1956-11-15 1961-01-03 Mueller Co Drilling machine
US3369416A (en) * 1960-09-26 1968-02-20 Luther E. Kilness Ratchet mechanism
US4993288A (en) * 1986-06-28 1991-02-19 Circle A Products, Inc. Power driven replacement socket ratchet wrench
US4924737A (en) * 1989-03-20 1990-05-15 Gummow Tool Company Positive drive ratchet
USRE43286E1 (en) 1999-08-03 2012-04-03 Bobby Hu 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
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
US7234372B2 (en) 2000-01-11 2007-06-26 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US20040055423A1 (en) * 2000-01-11 2004-03-25 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
US6282992B1 (en) * 2000-02-03 2001-09-04 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US7237460B2 (en) 2000-02-03 2007-07-03 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US20040139823A1 (en) * 2000-02-03 2004-07-22 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6955104B2 (en) 2000-03-13 2005-10-18 Bobby Hu Reversible ratcheting tool with a smaller head
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
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
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
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
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
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
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
US7017453B2 (en) 2001-10-17 2006-03-28 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
US6945141B2 (en) 2002-04-22 2005-09-20 Bobby Hu Reversible ratchet type wrench
US7032478B2 (en) 2002-07-22 2006-04-25 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US6971286B2 (en) 2002-07-22 2005-12-06 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US7178429B2 (en) 2002-08-05 2007-02-20 Yen-Wen Lin Easy-to-assemble ratcheting tool
US20140260819A1 (en) * 2013-03-14 2014-09-18 Stephen A. Gummow Hand tool with stepless locking mechanism
US9156144B2 (en) * 2013-03-14 2015-10-13 Stephen A. Gummow Hand tool with stepless locking mechanism

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