US3144108A - Impact wrench with separate inertia means - Google Patents
Impact wrench with separate inertia means Download PDFInfo
- Publication number
- US3144108A US3144108A US111198A US11119861A US3144108A US 3144108 A US3144108 A US 3144108A US 111198 A US111198 A US 111198A US 11119861 A US11119861 A US 11119861A US 3144108 A US3144108 A US 3144108A
- Authority
- US
- United States
- Prior art keywords
- anvil
- dog
- impact
- hammer mechanism
- casing
- 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
Links
Images
Classifications
-
- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
- B25B21/026—Impact clutches
Definitions
- This invention relates to impact wrenches and particularly to that type of impact wrench in which a hammer is adapted to strike a succession of blows in a rotary direction upon a member carrying a suitable work engaging tool such as a screwdriver blade, wrench socket and the like.
- the invention is particularly useful as applied to that type of wrench in which the hammer member is directly connected to the driving motor so that the mass of the motor and the hammer element combine to exert their kinetic energy on the work.
- this type of wrench it is customary to provide jaws movable on the hammer for engagement with a part generally called the anvil. Such jaws are moved into engagement with the anvil by a cam and upon striking the blow means, somewhat in the nature of a cam is provided for disengaging the jaw to permit rotation of the hammer to resume.
- this invention means is provided to delay the disengagement of the dog from the anvil until after the impact and the motion of the hammer with respect to the anvil has stopped.
- This means additionally has the effect at the instant of contact of the dog with the anvil of holding the hammer dog in the striking position positively or if desired to continue the motion of the hammer dog into the clutching direction even after striking the hammer blow.
- the invention has for its object to produce an impact clutch for a wrench or similar tool with an improved striking mechanism with relatively little wear on the striking faces, economical to maintain and simple to construct.
- FIGURE 1 is a longitudinal section of the front end of an impact wrench at the impacting mechanism
- FIG. 2 is a transverse section of the impact clutch taken along the line 22 of FIG. 1 looking in the direction of the arrows,
- FIG. 3 is a transverse section taken along the line 3-3 of FIG. 1 looking in the direction of the arrows,
- FIG. 4 is a transverse section similar to that of FIG. 2 showing the hammer dog in position released from the anvil,
- FIG. 5 is a perspective view of the cage of the hammer mechanism
- FIG. 6 is a perspective view of a sleeve for enclosing the inertia member of the hammer mechanism
- FIG. 7 is a perspective view of the inertia member of the hammer mechanism, being broken away at one side to show the construction in the opposite wall,
- FIG. 8 is a perspective view of an end plate of the hammer mechanism
- FIG. 9 is a perspective view of one of the hammer dogs.
- FIG. 10 is a perspective view of the upper portion of the anvil.
- FIG. 11 is an enlarged fragmentary plan view of the upper portion of the anvil showing the position of the striking face of the anvil jaw with respect to the longitudinal axis of the anvil.
- impact wrench 10 of which only the fore part is shown, composed of a motor casing 12 to which is attached a hammer casing 14 having nose portions 16 rotatably supporting an anvil member 18 projecting therefrom for attachment with a suitable work engaging implement such as the wrench socket 20.
- a motor shaft 22 fluted at its end 24 to engage a corresponding fluted aperture 26 of a hammer element in the form of a cage 28 (FIG. 5) encircling the rear end of anvil 18.
- Anvil 18 is adapted to rotate in a bearing sleeve 30 having a flanged end 36 upon which rests a bearing plate 40 shown in detail in FIG. 8 and having a central flange 42 fitting closely around the front bearing end of anvil 18 and abutting a collar portion 44 so that in position shown in FIG. 1 plate 40 lies between collar 44 and the flanged portion 36 of bearing sleeve 30.
- Plate 410 forms an end bearing for hammer cage 28 so that cage 28 is rotatable by motor shaft 22 one end bearing against plate 40 and the other against a collar 46 of shaft 22.
- Anvil 18 is adapted to be periodically engaged by the hammer mechanism and for this purpose is provided with a pair of jaws 48 in this instance diametrically opposed to each other and separated peripherally by spaces 5%? of lesser diameter terminating at jaws 48 in striking surfaces 52.
- dogs 54 For this engagement by the hammer mechanism there are provided dogs 54, two in number, carried by cage 28 on longitudinally disposed pins 56 fitting in bores 58 provided at the bottom of cage 28 and bores 6% in longitudinal alignment with bores 58 at the opposite end of cage 28. Pins 56 fit into longitudinal bores 62 formed in dogs 54 and form a bearing to permit oscillation of dogs 54 with respect to cage 28 as indicated in FIG. 2 and FIG. 4. With respect to jaws 48, dogs 54 rock somewhat as the escapement of a clock movement and to carry out the analogy, dogs 54 are provided with striking faces 64 between which the dog contour is arcuate as indicated at 66. As best shown in FIG.
- each striking face 52 lies in a plane A-A extending at a relatively small acute angle with respect to a radial plane B-B extending from the longitudinal axis C of anvil 18, the planes intersecting at the outer periphery of jaws 48.
- Each of the striking faces 52 of the anvil lying in a plane as above set forth provides a camming surface for the impinging faces 64 and 52 of dogs 54 and anvil 18, respectively, which camming surface is not sufficient to cause disengagement of those faces, while an inertia member 68, hereinafter fully described, rotates but is effective upon non-rotation of the inertia member to cause disengagement of the impinging faces as will be more fully described hereinafter.
- This invention provides a means to prolong the contact between striking faces 64 and 52. It ceases to act very shortly after the blow is delivered.
- the invention provides the inertia member 68 of considerable mass which is in the form of a sleeve encircling cage 28 and adapted to rotate thereon.
- Inertia member 68 is provided with notches 79 which are arranged to engage projecting tail portions 72 formed integrally with dogs 54 and which project beyond cage 28.
- a sleeve 74 encircles inertia member 63 and when in place as part of the hammer mechanism it is so held by contact with the plate 40 at the bottom and a flange 76 projecting from the upper portion of cage 28.
- Sleeve 74 has the effect of reinforcing inertia member 68 and in case of breakage would prevent escape of broken parts and general wreckage of the machine.
- socket 20 For the reception of socket 20 on the end of anvil 18, in this instance, the end as shown at 80 is squared and socket 20 is held in place by set screw 82. To indicate a suitable type of work to be performed, socket 20 is shown in engagement with the nut 84 of a bolt or stud 86 mounted in a plate 88.
- shaft 22 may be of any suitable description, electric or pneumatic, as will be understood.
- an electric motor is not preferred since the intermittent stopping is not beneficial.
- shaft 22 is provided preferably with suitable anti-friction bearings 90 mounted in motor casing 12 and the attachment of motor casing 12 to the hammer casing 14 may be by means of studs 92.
- cage 28 is shown with an embossed portion 94 projecting from the upper face to elongate the fluted aperture 26 for firm and rugged connection with the fluted end 24 of guide shaft 22. It will also be noted that the bore 60 in the upper end of cage 28 passes into boss 94 and terminates in a smaller bore 96 which provides an abutment to limit endwise movement of pins 56.
- An impact wrench comprising:
- cam means disposed on said anvil and operatively associated with said impact hammer mechanism to positively move said hammer mechanism in clutching and declutching directions with said anvil
- An impact wrench comprising:
- cam means disposed on said anvil and operatively associated with said impact hammer mechanism to positively move said impact hammer mechanism in clutching and declutching directions with said anvil, and
- An impact wrench comprising:
- cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching and declutching directions
- An impact wrench comprising:
- cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching and declutching directions
- (f) means disposed on said revoluble impact hammer mechanism to delay the motion of the dog in the declutching direction including a separate inertia member carried by said revoluble impact hammer mechanism.
- An impact wrench comprising:
- cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching direction to strike a blow
Description
Aug. 11, 1964 Filed May 19, 1961 H. C- REYNOLDS IMPACT WRENCH WITH SEFARATE INERTIA MEANS 2 Sheets-Sheet 1 HIS INVENTOR HAROLD O. REYNOLDS ATTORNEY Aug. 11, 1964 H. c. REYNOLDS IMPACT WRENCH WITH SEPARATE INERTIA MEANS 2 Sheets-Sheet 2 Filed May 19, 1961 INVENTOR HAROLD c. REYNOLDS BY ATTORNEY United States Patent 3,144,108 IMPACT WRENCH WITH SEPARATE INERTIA MEANS Harold C. Reynolds, Athens, Pa., assignor to lngersoll- Rand Company, New York, N.Y., a corporation of New Jersey Filed May 19, 1961, Ser. No. 111,198 7 Claims. (Cl. 19230.5)
This invention relates to impact wrenches and particularly to that type of impact wrench in which a hammer is adapted to strike a succession of blows in a rotary direction upon a member carrying a suitable work engaging tool such as a screwdriver blade, wrench socket and the like.
The invention is particularly useful as applied to that type of wrench in which the hammer member is directly connected to the driving motor so that the mass of the motor and the hammer element combine to exert their kinetic energy on the work. In this type of wrench it is customary to provide jaws movable on the hammer for engagement with a part generally called the anvil. Such jaws are moved into engagement with the anvil by a cam and upon striking the blow means, somewhat in the nature of a cam is provided for disengaging the jaw to permit rotation of the hammer to resume. An undesirable feature of constructions heretofore employed is that the means for disengaging the dog from the anvil starts to act even before the instant of impact thus resulting in a rubbing contact at the instant maximum pressure exists between the two impacting parts productive of a bad wearing condition therebetween.
By this invention means is provided to delay the disengagement of the dog from the anvil until after the impact and the motion of the hammer with respect to the anvil has stopped. This means additionally has the effect at the instant of contact of the dog with the anvil of holding the hammer dog in the striking position positively or if desired to continue the motion of the hammer dog into the clutching direction even after striking the hammer blow.
Thus the invention has for its object to produce an impact clutch for a wrench or similar tool with an improved striking mechanism with relatively little wear on the striking faces, economical to maintain and simple to construct.
Other objects and advantages of the invention will be in part pointed out and in part obvious hereinafter.
A preferred embodiment of the invention is illustrated in the drawing in which FIGURE 1 is a longitudinal section of the front end of an impact wrench at the impacting mechanism,
FIG. 2 is a transverse section of the impact clutch taken along the line 22 of FIG. 1 looking in the direction of the arrows,
FIG. 3 is a transverse section taken along the line 3-3 of FIG. 1 looking in the direction of the arrows,
FIG. 4 is a transverse section similar to that of FIG. 2 showing the hammer dog in position released from the anvil,
FIG. 5 is a perspective view of the cage of the hammer mechanism,
FIG. 6 is a perspective view of a sleeve for enclosing the inertia member of the hammer mechanism,
FIG. 7 is a perspective view of the inertia member of the hammer mechanism, being broken away at one side to show the construction in the opposite wall,
FIG. 8 is a perspective view of an end plate of the hammer mechanism,
FIG. 9 is a perspective view of one of the hammer dogs,
3,144,1h3 Patented Aug. 11, 1964 FIG. 10 is a perspective view of the upper portion of the anvil, and
FIG. 11 is an enlarged fragmentary plan view of the upper portion of the anvil showing the position of the striking face of the anvil jaw with respect to the longitudinal axis of the anvil.
Referring to the drawing, impact wrench 10, of which only the fore part is shown, composed of a motor casing 12 to which is attached a hammer casing 14 having nose portions 16 rotatably supporting an anvil member 18 projecting therefrom for attachment with a suitable work engaging implement such as the wrench socket 20. Pro jecting from motor casing 12 is provided a motor shaft 22 fluted at its end 24 to engage a corresponding fluted aperture 26 of a hammer element in the form of a cage 28 (FIG. 5) encircling the rear end of anvil 18.
For this engagement by the hammer mechanism there are provided dogs 54, two in number, carried by cage 28 on longitudinally disposed pins 56 fitting in bores 58 provided at the bottom of cage 28 and bores 6% in longitudinal alignment with bores 58 at the opposite end of cage 28. Pins 56 fit into longitudinal bores 62 formed in dogs 54 and form a bearing to permit oscillation of dogs 54 with respect to cage 28 as indicated in FIG. 2 and FIG. 4. With respect to jaws 48, dogs 54 rock somewhat as the escapement of a clock movement and to carry out the analogy, dogs 54 are provided with striking faces 64 between which the dog contour is arcuate as indicated at 66. As best shown in FIG. 11, the jaws 48 of anvil 18 are constructed so that each striking face 52 lies in a plane A-A extending at a relatively small acute angle with respect to a radial plane B-B extending from the longitudinal axis C of anvil 18, the planes intersecting at the outer periphery of jaws 48. Each of the striking faces 52 of the anvil lying in a plane as above set forth provides a camming surface for the impinging faces 64 and 52 of dogs 54 and anvil 18, respectively, which camming surface is not sufficient to cause disengagement of those faces, while an inertia member 68, hereinafter fully described, rotates but is effective upon non-rotation of the inertia member to cause disengagement of the impinging faces as will be more fully described hereinafter. As indicated in FIG. 2 when the forward striking face 64 hits, striking the corresponding striking face 52 of anvil 18, the tendency is to glance off which will move the tail end striking face 64 inwardly as shown in FIG. 4. Then as dog 54 moves around anvil 18 the tail end of the dog engages the corresponding jaw 48 to rock dog 54 again into the striking position of face 64 with respect to the next face 52 of the anvil. The glancing off between striking face 64 and the anvil striking face 52 has the effect of minimizing the effectiveness of the blow, and the reduction of the angularity of faces 64 with respect to the center of rotation on pin 56 is not entirely the complete solution as it would appear to be in some constructions heretofore used, as above referred to, inasmuch as in that case the camming effect of the striking faces is merely replaced by a cam drive arrangement which provides lost motion between the driver and the hammer dog and has the effect of softening the blow.
This invention provides a means to prolong the contact between striking faces 64 and 52. It ceases to act very shortly after the blow is delivered. To this end the invention provides the inertia member 68 of considerable mass which is in the form of a sleeve encircling cage 28 and adapted to rotate thereon. Inertia member 68 is provided with notches 79 which are arranged to engage projecting tail portions 72 formed integrally with dogs 54 and which project beyond cage 28. A sleeve 74 encircles inertia member 63 and when in place as part of the hammer mechanism it is so held by contact with the plate 40 at the bottom and a flange 76 projecting from the upper portion of cage 28. Sleeve 74 has the effect of reinforcing inertia member 68 and in case of breakage would prevent escape of broken parts and general wreckage of the machine.
In operation, and assuming clockwise rotation of the cage by motor shaft 22 (FIG. 2 and FIG. 4), and assuming that the parts start in the position shown in FIG. 4 wherein the tail end of dog 54 lies in the space 50 between striking faces 52, rotation of cage 28 with respect to anvil 18 brings the tail end of dog 54 into contact with the jaw 48 to rock dog 54 which in turn accelerates the inertia member 68 through the tail portion 72. The camming effect of dogs 54 and jaws 4S rocks the dog 54 so that the forward striking face 64 is moved inwardly into the space 50 and although this may not cause the forward striking faces 64 to bottom on the surface 50, still, at the instant of contact between striking face 64 and face 52 to stop rotation of cage 28, the inertia of member 68 will be suflicient to continue the rocking effect of dog 54 and to oppose any outward glancing of face 64. In fact it will tend to move dog 54 into deeper contact with face 52. However, after stopping of inertia member 68, the glancing effect or camming whichever may seem the more appropriate term of face 64 with respect to face 52 can now take place to disenagage those faces as indicated in FIG. 4 whereupon the cycle of operation is repeated.
For the reception of socket 20 on the end of anvil 18, in this instance, the end as shown at 80 is squared and socket 20 is held in place by set screw 82. To indicate a suitable type of work to be performed, socket 20 is shown in engagement with the nut 84 of a bolt or stud 86 mounted in a plate 88.
It is understood that the motor for attachment to shaft 22 may be of any suitable description, electric or pneumatic, as will be understood. For this purpose an electric motor is not preferred since the intermittent stopping is not beneficial. Also, shaft 22 is provided preferably with suitable anti-friction bearings 90 mounted in motor casing 12 and the attachment of motor casing 12 to the hammer casing 14 may be by means of studs 92.
As a matter of preferred construction, cage 28 is shown with an embossed portion 94 projecting from the upper face to elongate the fluted aperture 26 for firm and rugged connection with the fluted end 24 of guide shaft 22. It will also be noted that the bore 60 in the upper end of cage 28 passes into boss 94 and terminates in a smaller bore 96 which provides an abutment to limit endwise movement of pins 56.
Thus by the above construction are accomplished, among others, the objects hereinbefore referred to.
I claim:
1. An impact wrench comprising:
(a) a casing,
(b) an impact hammer mechanism rotatably disposed within said casing,
(c) an anvil rotatably disposed Within said casing and Within said impact hammer mechanism,
(d) cam means disposed on said anvil and operatively associated with said impact hammer mechanism to positively move said hammer mechanism in clutching and declutching directions with said anvil, and
(e) separate inertia means disposed on said impact hammer mechanism to delay the motion of said impact hammer mechanism into said declutching direction.
2. An impact wrench comprising:
(a) a casing,
(b) a rotatable anvil disposed in said casing,
(c) an impact hammer mechanism disposed in said casing encircling said rotatable anvil, said impact hammer mechanism being rotatable about an axis parallel to said anvil,
(d) cam means disposed on said anvil and operatively associated with said impact hammer mechanism to positively move said impact hammer mechanism in clutching and declutching directions with said anvil, and
(e) means disposed on said impact hammer mechanism to delay the motion of said impact hammer mechanism in said declutching direction including a separate inertia member carried by said impact hammer mechanism.
3. An impact wrench comprising:
(a) a casing,
(b) a rotatable anvil disposed in said casing,
(c) a revoluble impact hammer mechanism disposed in said casing encircling said anvil,
(d) a dog disposed on said revoluble impact hammer mechanism pivoted about an axis parallel to said anvil and movable into clutching and declutching directions with said anvil,
(e) cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching and declutching directions, and
(1) separate inertia means disposed on said revoluble impact hammer mechanism to delay the motion of the dog in the declutching direction.
4. An impact wrench comprising:
(a) a casing,
(b) a rotatable anvil disposed in said casing,
(c) a revoluble impact hammer mechanism disposed in said casing encircling said anvil,
(d) a dog disposed on said revoluble impact hammer mechanism pivoted about an axis parallel to said anvil and movable into clutching and declutching directions with said anvil,
(e) cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching and declutching directions, and
(f) means disposed on said revoluble impact hammer mechanism to delay the motion of the dog in the declutching direction including a separate inertia member carried by said revoluble impact hammer mechanism.
5. An impact wrench comprising:
(a) a casing,
(b) a rotatable anvil disposed in said casing,
(c) a hammer mechanism disposed in said casing rotatable about an axis parallel to said anvil,
(d) a dog disposed on said hammer mechanism movable into clutching and declutching directions with said anvil,
(e) cam means disposed on said anvil and operatively associated with said dog for positively moving said dog in said clutching direction to strike a blow,
(f) separate inertia means disposed in said hammer mechanism to continue the motion of said dog in said clutching direction after striking said blow, and
(g) means to move said dog in said declutching direction.
6. A11 impact wrench as set forth in claim 5 in which said separate inertia means to continue the motion of said hammer mechanism includes an inertia member acmated by said cam means.
7. An impact wrench as set forth in claim 6 in which said inertia member is engaged by said dog and is accelerated thereby.
References Cited in the file of this patent UNITED STATES PATENTS Rueckart et a]. Jan. 31, 1933 Moretti Dec. 26, 1939 Amtsberg June 9, 1942 Jimerson Sept. 27, 1955 Schmid Aug. 13, 1957
Claims (1)
1. AN IMPACT WRENCH COMPRISING: (A) A CASING, (B) AN IMPACT HAMMER MECHANISM ROTATABLY DISPOSED WITHIN SAID CASING, (C) AN ANVIL ROTATABLY DISPOSED WITHIN SAID CASING AND WITHIN SAID IMPACT HAMMER MECHANISM, (D) CAM MEANS DISPOSED ON SAID ANVIL AND OPERATIVELY ASSOCIATED WITH SAID IMPACT HAMMER MECHANISM TO POSITIVELY MOVE SAID HAMMER MECHANISM IN CLUTCHING AND DECLUTCHING DIRECTIONS WITH SAID ANVIL, AND
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US111198A US3144108A (en) | 1961-05-19 | 1961-05-19 | Impact wrench with separate inertia means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US111198A US3144108A (en) | 1961-05-19 | 1961-05-19 | Impact wrench with separate inertia means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3144108A true US3144108A (en) | 1964-08-11 |
Family
ID=22337105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US111198A Expired - Lifetime US3144108A (en) | 1961-05-19 | 1961-05-19 | Impact wrench with separate inertia means |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3144108A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3380539A (en) * | 1964-09-08 | 1968-04-30 | Skil Corp | Impact clutch |
| US4287956A (en) * | 1979-08-10 | 1981-09-08 | Maurer Spencer B | Impact wrench mechanism and pivot clutch |
| US6024180A (en) * | 1998-02-12 | 2000-02-15 | Lin; Chen-Yang | Cage device for a pneumatically driven power tool |
| US6070674A (en) * | 1998-06-11 | 2000-06-06 | Chicago Pneumatic Tool Company | Modified cage member for an impact mechanism |
| US6733414B2 (en) | 2001-01-12 | 2004-05-11 | Milwaukee Electric Tool Corporation | Gear assembly for a power tool |
| EP2073957A1 (en) * | 2006-10-13 | 2009-07-01 | Atlas Copco Tools Ab | Impact wrench with a lubrri cated impact mechanism |
| US20140069674A1 (en) * | 2012-09-07 | 2014-03-13 | Super Power Tools Co., Ltd. | Percussive hammer for pneumatic or electric tools |
| US20150000946A1 (en) * | 2013-07-01 | 2015-01-01 | Ingersoll-Rand Company | Rotary Impact Tool |
| US20150343616A1 (en) * | 2014-06-03 | 2015-12-03 | Soartec Industrial Corp. | Hammering set for an impact tool |
| US9289886B2 (en) | 2010-11-04 | 2016-03-22 | Milwaukee Electric Tool Corporation | Impact tool with adjustable clutch |
| US20160214238A1 (en) * | 2015-01-23 | 2016-07-28 | Storm Pneumtic Tool Co., Ltd. | Pneumatic tool having an impact module with dual impact |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1895821A (en) * | 1930-09-22 | 1933-01-31 | Walter G Rueckart | Clutch mechanism for use in motor vehicle transmissions |
| US2184394A (en) * | 1937-09-20 | 1939-12-26 | Millers Falls Co | Clutch mechanism |
| US2285639A (en) * | 1941-07-03 | 1942-06-09 | Chicago Pneumatic Tool Co | Impact clutch |
| US2718803A (en) * | 1954-08-16 | 1955-09-27 | Ingersoll Rand Co | Impact wrench |
| US2802556A (en) * | 1952-05-14 | 1957-08-13 | Reed Roller Bit Co | Impact hammer element |
-
1961
- 1961-05-19 US US111198A patent/US3144108A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1895821A (en) * | 1930-09-22 | 1933-01-31 | Walter G Rueckart | Clutch mechanism for use in motor vehicle transmissions |
| US2184394A (en) * | 1937-09-20 | 1939-12-26 | Millers Falls Co | Clutch mechanism |
| US2285639A (en) * | 1941-07-03 | 1942-06-09 | Chicago Pneumatic Tool Co | Impact clutch |
| US2802556A (en) * | 1952-05-14 | 1957-08-13 | Reed Roller Bit Co | Impact hammer element |
| US2718803A (en) * | 1954-08-16 | 1955-09-27 | Ingersoll Rand Co | Impact wrench |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3380539A (en) * | 1964-09-08 | 1968-04-30 | Skil Corp | Impact clutch |
| US4287956A (en) * | 1979-08-10 | 1981-09-08 | Maurer Spencer B | Impact wrench mechanism and pivot clutch |
| US6024180A (en) * | 1998-02-12 | 2000-02-15 | Lin; Chen-Yang | Cage device for a pneumatically driven power tool |
| US6070674A (en) * | 1998-06-11 | 2000-06-06 | Chicago Pneumatic Tool Company | Modified cage member for an impact mechanism |
| US6733414B2 (en) | 2001-01-12 | 2004-05-11 | Milwaukee Electric Tool Corporation | Gear assembly for a power tool |
| EP2073957A4 (en) * | 2006-10-13 | 2010-03-10 | Atlas Copco Tools Ab | Impact wrench with a lubrri cated impact mechanism |
| EP2073957A1 (en) * | 2006-10-13 | 2009-07-01 | Atlas Copco Tools Ab | Impact wrench with a lubrri cated impact mechanism |
| US20100071924A1 (en) * | 2006-10-13 | 2010-03-25 | Knut Christian Schoeps | Impact wrench with a lubricated impact mechanism |
| US7938195B2 (en) | 2006-10-13 | 2011-05-10 | Atlas Copco Tools Ab | Impact wrench with a lubricated impact mechanism |
| US9289886B2 (en) | 2010-11-04 | 2016-03-22 | Milwaukee Electric Tool Corporation | Impact tool with adjustable clutch |
| US20140069674A1 (en) * | 2012-09-07 | 2014-03-13 | Super Power Tools Co., Ltd. | Percussive hammer for pneumatic or electric tools |
| US20150000946A1 (en) * | 2013-07-01 | 2015-01-01 | Ingersoll-Rand Company | Rotary Impact Tool |
| US9555532B2 (en) * | 2013-07-01 | 2017-01-31 | Ingersoll-Rand Company | Rotary impact tool |
| US20150343616A1 (en) * | 2014-06-03 | 2015-12-03 | Soartec Industrial Corp. | Hammering set for an impact tool |
| US20160214238A1 (en) * | 2015-01-23 | 2016-07-28 | Storm Pneumtic Tool Co., Ltd. | Pneumatic tool having an impact module with dual impact |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3144108A (en) | Impact wrench with separate inertia means | |
| US3533479A (en) | Impact mechanism with improved hammer and hammer frame assembly therefor | |
| US2425793A (en) | Impact wrench | |
| US3605914A (en) | Rotary impact wrench mechanism | |
| US4557337A (en) | Impact wrench | |
| US2539678A (en) | Impact tool | |
| US3150725A (en) | Magnetically operated tool | |
| US2564224A (en) | Impact tool | |
| US3123156A (en) | gapstur | |
| US3606931A (en) | Rotary impact motor | |
| US3072232A (en) | Rotary impact tool | |
| US3557884A (en) | Impact wrench mechanism | |
| US3157074A (en) | Hand operated impact wrench | |
| US2801718A (en) | Impact clutch mechanism | |
| US2591323A (en) | Power-operated impact wrench | |
| US3561543A (en) | Rotary impact wrench mechanism | |
| US2220711A (en) | Impact tool | |
| US2285639A (en) | Impact clutch | |
| US3179219A (en) | Impact clutches | |
| US3070201A (en) | Impact tool | |
| US2842994A (en) | Rotary impact wrench | |
| US3128400A (en) | Clutch mechanism | |
| US2268412A (en) | Rotary impact tool | |
| US3380539A (en) | Impact clutch | |
| US2094185A (en) | Hammer attachment for drills |