US2339530A - Rotary tool - Google Patents

Rotary tool Download PDF

Info

Publication number
US2339530A
US2339530A US408546A US40854641A US2339530A US 2339530 A US2339530 A US 2339530A US 408546 A US408546 A US 408546A US 40854641 A US40854641 A US 40854641A US 2339530 A US2339530 A US 2339530A
Authority
US
United States
Prior art keywords
head
driving head
driven
rotation
driving
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
US408546A
Inventor
Paul Van Sittert
Andrew J Lev
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.)
Cleveland Pneumatic Tool Co
Original Assignee
Cleveland Pneumatic Tool Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cleveland Pneumatic Tool Co filed Critical Cleveland Pneumatic Tool Co
Priority to US408546A priority Critical patent/US2339530A/en
Application granted granted Critical
Publication of US2339530A publication Critical patent/US2339530A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02Portable 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
    • B25B21/026Impact clutches

Description

Jan. 18, 1944. P. VAN SITTERT E1; AL 2,
ROTARY TOOL Filed Aug. 27, 1941 2 Sheets-Sheet l INVENTORS PAUL VAN JITTERT AND/Q5 W -11 LEV BY W ATTORNEY Jan. 18, 1944. P. VAN SITTERT ETAL 2,339,530
ROTARY TOOL Filed Aug. 2'7, 1941 2 Sheets-Sheet 2 INVENTOR PAUL 144W 5 7-5 AND/? W 'J. LE 1 Y ATTORNEY Patented Jan. 18, 1944 ROTARY TOOL I Paul Van Sitter-t, Shaker Heights, and-Andrew I.
Lev, Garfield Heights, Ohio, assignors to The Cleveland Pneumatic Tool, Company, Cleveland. Ohio, a corporation of Ohio Application August 27, 1941, Serial No. 408,546
' 14 Claims.
This invention relates broadly to a portable rotary impact tool, but more particularly to an impact producing mechanism for such a tool.
One object of this invention is to produc a rotary impact tool with an improved impact delivering mechanism capable under certain conditions of operation of remaining inoperative anism capable of delivering impacts of an in- .tensity materially greater than that heretofore delivered by portable rotary impact tools of similar size and power consumption.
Another object of this invention i th provision in a rotary impact tool of means enabling positive engagement of the impact delivering member with component driven parts, thereby allowing for the provisionof adequate impact delivering and receiving surfaces adapted to resist premature wear and breakage.
Another object of this invention i to produce an improved rotary impact delivering mechanism for use with a reversible rotary motor.
.Still another object of this invention is to produce a portable reversible rotary'impact tool Fig. 8 is a cross sectional view taken in a plane indicated by line 8-8 in Fig. 1.
' side of the partition in Fig. 1, is formed with an which is compact, strong, durable and efiicient.
' vention.
Fig. 2 is va view similar to Fig. '1 but showing some of the parts in another position.
Fig. 3 is a cross sectional view taken in a plane indicated by 3-3 in Fig. 1.
Fig. 4 is a cross sectional view taken in a plane indicated by line 44 in Fig. 2.
Fig. 9 is a cross sectional view taken in a plane indicated by line 9-9 in Fig. 1.
Fig. 10 is a cross sectional view taken in a plane indicated by line Ill-J0 in Fig. 1.
Fig. 11 is a cross sectional view taken in a plane indicated by line llll in Fig. 2.
Referring to the drawings, there is shown the front end of a motor housing 20 having mounted therein a'fluid actuated rotary motor of the reversible type. Since the motor forms no part of the present invention, no illustration or description thereof is thought necessary other than pointing out that the motor may be of any suitable type and of a size and weight adaptable for use with the device to be described so as to form therewith'a portable tool. The front end of the motor housing 20 is externally threaded as at 2| to receive a substantially 'cup shaped casing 22 having housed therein the mechanism to be hereinafter described. an
A driving shaft 23 operatively associated with the motor within the housing 20 is journaled within a housing partition 24 and, onth left integral collar 25, which collar is provided with two diametrically'opposed longitudinally extending and open ended grooves 26 and 21, each groove having slidably mounted within its side walls a spring pressed plunger 28 having its outward slidable movement limited by a cross pin 29 engaging the end of a flat 30 provided on the pin 28 intermediate its ends. From the collar 25, the shaft 23 extends into the casing 22 and has secured thereon by a cross pin 3! a ring 32 formed with two diametrically opposed notches 33, each notch being of a predetermined width and having outwardly inclined side walls 34. Im-' mediately below the ring 32, the shaft 23 is formed with a reduced portion 35 having mounted thereon a cylindrical, relatively heavy member hereinafter'referred to as a driving head 36 which has its end adjacent the collar 25 provided with two lugs 6i and 62 longitudinally extending into the grooves 26 and 21 of the col- Fig. 5 is a side-'view of some of the part in 7 their relative position assumed in the mechanism 'la'r 25, each lug being located between two plungers 28 protruding from the side walls of the groove. That same end of the driving head is also formed with a counterbore 31 accommodating the ring 32 mounted on the shaft 23. Ex-' teriorly, the driving head 36 is provided with two diametrically opposed guideway 38 extending longitudinally from one to the other end of the head, each guideway having a key or do 33 slidabiy mounted therein flush with the peripheral wall of the driving head and retained withinthe guideway 38 by a cylindrical sleeve to fitted over the driving head 33. The guideways so are deep enough to break into the counterbore 37 of the driving head 33. Each dog 33 has its end portion adjacent the collar 25 of the shaft 23 carrying a stub shaft ti extending into the counterbore 37 where it carries a roller s2 normally located within one of the notches 33 provided in the ring 32. The inner longitudinal wall of each dog is provided with an elongated groove 53 accommodating a compression spring it having one end resting against the corresponding end of the groove while the other end rests on a pin 65 carried by the driving head 36 and extending therefrom into the groove 33, thus the spring td constantly urges the dog 39 away from the collar 25, which movement is limited by the engagement of the roller 42 with the bottom of the notch 33 of the ring 32.
Rotatable within the front end of the casin 22, there is a driven head comprising a plate 43 resting on the bottom of the casing 22 and having a shaft portion 41 extending therefrom through the casing, which shaft is terminated by a hexagon head 43 fitting within one end of a socket wrench 49 adapted to fit over the work represented by a nut 30 positioned for rotation on a bolt iii. The plate 43 is coaxial with the driving head 33 and has two diametrically opposed lugs or clutch teeth 32 extending from the inner side thereof toward the driving head 33, which lugs are engageable by the dogs 33 to form a releasable clutch. Radially the lugs 32 extend from the outside edge'of the plate 43 partly toward the center thereof and'have located between them a disk 33 journaled on a small shaft 34 extending from the plate or driven head 33 into the driving head to assist the shaft 33 in rotatably supporting the driving head. The disk 53 is provided with an internal ring gear 33 accommodated within a shallow counterbore .33 in the driving head 33. Meshing with the Fig. 10, that is with its grooves 63 in position to allow slidable movement of the dogs as through the grooves into engagement with'the lugs 52 of the driven head as. thereby transmitting rotation from the driving to the driven head and finally to the nut 56'. In this normal driving position of the dogs 33, the rollers 62 carried by the dogs are positioned in the notches 233 as shown in Fig. 5. During this rotation of the driving and driven heads, the gears 51 carried by the driving head will rotate therewith while remaining on their respective shafts 58, and due to their engagement with the ring gear BB will transrnit rotation to the disk 53 at the same rate of speed as that of the heads, thereby preventing rotation of, the disk groovestil relative to the dogs 39.
When the nut Kill is about set, its resistance to rotation will result in a rapid deceleration of the driven head :33 and driving head 33 while the shaft 23 is still rotated at its original rate of speed, therebycausing relative rotation between the driving head 33 and the shaft 23 which is possible by the. inward movement of the driving spring pressed plungers 28 within the side walls or the grooves 26 and 21 and limited by the engagement of the lugs 3| and 62 with the side walls or the grooves 23 and 21 as shown in Fig. 4. This limited relative rotation will cause the ring 32 carried by the shaft 23 torotate relative to the rolls 42- carried by the dogs 39, resulting in a camming action of the side walls 34 of the notches 33 on the rollers 42 for moving the rollers out of the notches and cause them to rest on the end wall of the ring 32 adjacent the collar 23. This outward movement of the roll- V are is of course. transmitted to the dogs 33, cansextend radially inward beyond the lugs 32 and I consequently inside of the outer marginal edge of the disk to rest on the disk as shown in Fig. 2. Inthickness, the disk 33 exceeds somewhat the height of the lugs 32, thereby preventin engagement of the dogs 33 with the lugs 32 when the dogs rest on the disk 33. Externally, the disk 33 is provided withtwo diametrically 'opposed longitudinally extending grooves 33 through which the dogs 39 are free to slide for engagement with the lug 32 aswill be explained later.
In the operation of the mechanism, rotation in one or the other direction is imparted to the shaft 23 by the motor housed within the housing 20. Assuming now that the rotation of the shaft'23 is in the clockwise direction when viewed from the motor end of the tool, that is in the clockwise direction in Figs. 3 and 4. The rotation of the shaft 23 is transmitted to the driving head 33 by the spring pressed plungers 23 active on ing disengagement or release of the dogs from the lugs 32 of the driven head 43 and enabling free rotation of the driving head 33 relative to Y the now stationary driven head 43. Immediately after the disengagement of the dogs 33, the gears 31 rotated around the now stationary pinion 33 will transmit rotation to the ring gear 33 and consequently to the disk 33 at a rate of speed calculated to be somewhat faster than that of the driving head. In the present construction, the gears 33, 31 and 33 are calculated to result in three and one-half revolutions of the disk 33 for each three revolutions of the driving head 33. This predetermined differential rate of rotation between the driving head and the disk 53 will result in the grooves 33 of the disk to the lugs BI and 32 of the driving head as shown in Fig. 3, the lugs 3| and 32 being normally maintained central within the grooves 23 and 21 by the spring pressed ungers 28.
Normally, the disk 3 is located as shown in be moved out of the longitudinal path of the dogs 39, thereby preventing engagement of the dogs 39 with the lugs 52 and consequently enabling the driving head to reach its maximum rotary speed before reengagement of its dogs 33 with the lugs 32.
During the rotation of the driving head relative to the driven head, the lugs BI and 32 of the driving head will gradually be moved in central position within the grooves 23 and 210! the shaft collar 23 by the action of the depressed spring pressed plungers 28 on the lugs ill and 32,- thereby positioning the rollers 42 directly above but not in the notches 33.
Dining this axial movement of the dogs 39. the rollers 42 carried by the dogs will again be moved into the notches 33 of the disk 32 as shown in Fig. 5.
As the dogs 39 finally reach the lugs 52, the inertia of the driving head 36, which head has now reached its maximum rotary speed, is transmitted to the dogs 39 causing them to deliver a powerful rotary impact to the lugs 52 which is communicated to the socket wrench 49 and resuits in imparting a relatively strong short impulse to turn the nut. when the engagement or impact takes place, resistance to rotation of the driven head will again be transmitted to the driving head which will momentarily stop abruptly, causing the shaft 23 to rotate relative to the 'driving head from the position in Fig. 3 to that in Fig. 4 and again causing upward movement of the rollers 42 from the position in Fig. 5 to that in Fig. 6 for disengaging the dogs 39 from the lugs 52. These cycles follow each other in rapid succession and are continued until the operator by experience knows that the nut has been driven home as tightly as desired, whereupon the motor housed within the housing 20 is stopped and the tool removed from the nut.
When it is desired to use the tool for removing nuts from bolts, the motor within the housing 20 maybe reversed for imparting rotation to the shaft 23 in the other direction. The engagement and disengagement of the clutch comprising the dogs 39 and lugs 52 occurs in the manner above described, since all of the operating parts are double-acting and function exactly the same regardless of the direction of rotation. However, in running the tool in such reverse direction the impacts occur at the start of the operation and afterthe nut is sufliciently loosened the driven head may turn continuously instead of intermittently.
Although the foregoing description is necesarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed,
We claim:
1. In a power actuated tool of the class described, a rotary driving head, a driven head, clutch means between said heads capable of re-\ lease to enable rotation of said driving head relative to said driven head, means responsive to a predetermined resistance to rotation of said driven head for efiecting said release, means including a train of gears drivenly associated with said driving head for maintaining said clutch means in released position during more than one revolution of said driving head relative to said driven head, and means effecting subsequent reengagement of said clutch means.
2. In a power actuated tool of the class described, a prime mover, a driving and a driven head, clutch means between said heads capable of-release to enable rotation of the driving head relative to the driven head, connecting means between said prime mover and driving head including means enabling limited relative rotation therebetween upon predetermined resistance to rotation of aid driving head, means responsive to said limited relative rotation for eifecting said release, means responsive to the rotation of the driving head relative to said driven head for maintaining said clutch means in released position during more than one revolution of said driving head, and means effecting subsequent reengagement of said clutch means.
3. In a power actuated tool of the class described, a prime mover, a driving and a driven head, clutch means between said heads capable said clutch means in released position during more than one revolution of said driving head, and mean effecting subsequent reengagement of said clutch means.
4. In a power actuated tool 'of the class de scribed, a prime mover rotatable in either direction, a driving and a driven head, clutch means between said heads capable of release to enable rotation of the driving head relative to the driven head, a resilient connection between said prime mover and driving head enabling limited rotation therebetween upon predetermined resistance to rotation of said driven head irrespective of the direction of rotation of said prime mover, cam means between said prime mover and driving head responsive to said limited relative rotation for effecting said release, means deriving motion from the rotation of said driving head relative to said driven head for maintaining said clutch means in released position during more than one revolution of said driving head, and means effecting subsequent reengagement of said clutch means.
5; In a power tool of the class described, a rotary driving head, a driven head, teeth on said driven head, longitudinally slidable dogs carried by said driving head engageable with said teeth for transmitting rotation from. said driving to said driven head but capable of release to enable relative rotation therebetween, a prime mover for said driving head, a resilient connection between said driving head and prime mover enabling limited relative rotation therebetween upon predetermined resistance to rotation of said driven head,
cam means between said dogs and prime mover responsive to said limited relative rotation for efiecting aid release, means deriving motion from the relative rotation between said heads for maintaining said dogs in released position during more 6. In a power tool of the class described, including a drive shaft and means for operating,
the same, a rotary driving head mounted on said shaft, a driven head operably associated with said driving head, clutch means between said heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said driven head for effecting said release, said clutch means including spaced lugs formed on said driven head, longitudinally slidable dogs carried by said driv- 0 ing head engageable with said lugs for transmitting motion' from said driving head to said driven head, means carried by said driven head between said spaced lugs and operable by said driving head for maintaining said clutch means in reof said driving head relative to said driven head, and means effecting subsequent reengagement of said clutch means.
7. In a power tool of the class described, including a drive shaft and means for operating the same, a rotary driving head mounted on said shaft, a driven head operably associated with said driving head, clutch means between said heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said driven head for effecting said release, said clutch means including spaced lugs formed on said driven head, longitudinally slidable dogs carried by said driving head engageable with said lugs for transmitting motion from said driving head to said driven head, a disc rotatably carried by said driven head and supported between said lugs, said disc having grooves through which said dogs extend for engagement with said lugs, means on said driving head cooperating with said rotatable disc for maintaining said lugs and dogs in released position during more than one revolution of said driving head relative to said driven head, and means effecting subsequent reengagement of said clutch means.
8. In a power tool of the class described, in-
cluding a drive shaft and means for operating the same, a rotary driving head mounted on said shaft, a driven head operably associated with said driving head, clutch means between said heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said driven head for effecting said release, said clutch means including spaced lugs formed on said driven head, longitudinally slidable dogs carried by said driving head engageable with said lugs for transmitting motion from said driving head to said driven head, a disc rotatably carried by said driven head and supported between said lugs, said disc having grooves through which said dogs extend for engagement with said lugs, means including a train of gears drivenly associated with said driving head and cooperating with said rotatable disc for maintaining said lugs and dogs in released position during more than one revolution of said driving head relative to said driven head, and means effecting subsequent reengagement of said clutch means.
9. In a power tool of the class described, including a drive shaft and means for operating the same, a driving head mounted on said shaft, a driven head operably associated with said driving head, clutch means between said heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said driven head for effecting said release, a collar on said shaft and being formed with diametrically opposed grooves, resilient means in said grooves for connecting said driving head andshaft enabling limited relative rotation therebetween upon predetermined resistance to rotation of said driven head, means deriving motion from the rotation of said driving head relative to saiddriven head for maintaining said clutch means in released position during more than one revolution of said driving head, and means effecting subsequent reengagement of said clutch means.
10, In a power tool of the class described, including a drive haft and means for operating the same, a driving head mounted on said shaft, a
driven head operably associated with said driving Y assasso a mined resistance of rotation of said driven head.
of release to enable relative rotation therebetween, means responsive to a predetermined resistance torotation of said driven head for eflecting said release, a collar on said shaft and being formed with diametrically opposed grooves, a pair of spring pressed plungers siidably mounted in spaced relation within said grooves, said driving head having a pair of lugs extending into said grooves between said pair of plungers ,for connecting said driving head and shaft and enabling limited relative rotation therebetween upon pre- 7 tion of said driving head, and means effecting subsequent reengagement of said clutch means.
11. In a power tool of the-class described, including a drive shaft and means for operating the same, a rotarydriving head mounted on said shaft, a driven head operably associated with said driving head, clutch mean betweensaid heads capable of release to enable relative rotation therebetween, means responsive to a predeterfor effecting said release, said clutch means including spaced lugs formed on said driven head, longitudinally slidable dogs carried by said driving head engageablewith said lugs for transmitting motion from aid driving head to said driven head, a resilient connection between said driving head and shaft enabling limited relative rotation therebetween upon predetermined resistance to rotation of said driven head, a ring on said shaft more than one revolution of said driving head,
and means effecting subsequent reengagement of said clutch means.
12. In a power tool of the class described, a rotary driving head, a driven head, clutch means between said heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said driven head for effecting said release, means drivenly associated with said driving head, control means carried by said driven head and cooperating with said drivenly associated means deriving motion from said relative rotation for maintaining said clutch means in released position during more than one revolution of said driving head relative to said driven head, and means on said control means positionable for enabling subsequent reengagement of said clutch means.
13. .In a power tool of the class described, a rotary driving head, a driven head, clutch means between aid heads capable of release to enable relative rotation therebetween, means responsive to a predetermined resistance to rotation of said said driven head for effecting said release, means drivenly associated with said driving head, means carried by said driven head and cooperating with said drivenly associated meansderiving motion from said relative rotation for maintaining said clutch means in released position during more.
- than one revolution of said driving head relative to said driven head, and means effecting subsequent reengagement of said clutch means. 14. In a power tool of the class described, a
by said driven head and cooperating with said drivenly associated means deriving motion from said relative rotation for maintaining said clutch means in released position during more than one revolution of said driving head relative to said driven head, and means effecting subsequent reengagement of said cliitch means.
, PAUL VAN SIT'IERT.
'ANDREW J. LEV.
US408546A 1941-08-27 1941-08-27 Rotary tool Expired - Lifetime US2339530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US408546A US2339530A (en) 1941-08-27 1941-08-27 Rotary tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408546A US2339530A (en) 1941-08-27 1941-08-27 Rotary tool

Publications (1)

Publication Number Publication Date
US2339530A true US2339530A (en) 1944-01-18

Family

ID=23616714

Family Applications (1)

Application Number Title Priority Date Filing Date
US408546A Expired - Lifetime US2339530A (en) 1941-08-27 1941-08-27 Rotary tool

Country Status (1)

Country Link
US (1) US2339530A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439756A (en) * 1943-07-09 1948-04-13 Keller Tool Co Impact clutch
US2563711A (en) * 1948-02-24 1951-08-07 Clifford E Fitch Impact tool
US2564224A (en) * 1946-04-08 1951-08-14 Independent Pneumatic Tool Co Impact tool
US2585486A (en) * 1949-03-17 1952-02-12 Independent Pneumatic Tool Co Impact type clutch
US2637426A (en) * 1948-02-04 1953-05-05 Rotor Tool Company Impact type clutch
US2641419A (en) * 1949-04-30 1953-06-09 Airex Mfg Co Inc Fishing reel
US2684738A (en) * 1949-12-27 1954-07-27 Reuben A Kaplan Rotary impact tool
US3070201A (en) * 1960-03-02 1962-12-25 Ingersoli Rand Company Impact tool
US3175660A (en) * 1962-09-28 1965-03-30 Skil Corp Rotary impact tool
US3198303A (en) * 1964-01-06 1965-08-03 Ingersoll Rand Co Rotary impact tool
US4313505A (en) * 1979-08-27 1982-02-02 Rodac Pneumatic Tools Rotary impact clutch
US5890848A (en) * 1997-08-05 1999-04-06 Cooper Technologies Company Method and apparatus for simultaneously lubricating a cutting point of a tool and controlling the application rate of the tool to a work piece
US6082986A (en) * 1998-08-19 2000-07-04 Cooper Technologies Reversible double-throw air motor
US6105595A (en) * 1997-03-07 2000-08-22 Cooper Technologies Co. Method, system, and apparatus for automatically preventing or allowing flow of a fluid
US6241500B1 (en) 2000-03-23 2001-06-05 Cooper Brands, Inc. Double-throw air motor with reverse feature
CN102458772A (en) * 2009-06-03 2012-05-16 株式会社空研 Impact wrench

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439756A (en) * 1943-07-09 1948-04-13 Keller Tool Co Impact clutch
US2564224A (en) * 1946-04-08 1951-08-14 Independent Pneumatic Tool Co Impact tool
US2637426A (en) * 1948-02-04 1953-05-05 Rotor Tool Company Impact type clutch
US2563711A (en) * 1948-02-24 1951-08-07 Clifford E Fitch Impact tool
US2585486A (en) * 1949-03-17 1952-02-12 Independent Pneumatic Tool Co Impact type clutch
US2641419A (en) * 1949-04-30 1953-06-09 Airex Mfg Co Inc Fishing reel
US2684738A (en) * 1949-12-27 1954-07-27 Reuben A Kaplan Rotary impact tool
US3070201A (en) * 1960-03-02 1962-12-25 Ingersoli Rand Company Impact tool
US3175660A (en) * 1962-09-28 1965-03-30 Skil Corp Rotary impact tool
US3198303A (en) * 1964-01-06 1965-08-03 Ingersoll Rand Co Rotary impact tool
US4313505A (en) * 1979-08-27 1982-02-02 Rodac Pneumatic Tools Rotary impact clutch
US6105595A (en) * 1997-03-07 2000-08-22 Cooper Technologies Co. Method, system, and apparatus for automatically preventing or allowing flow of a fluid
US5890848A (en) * 1997-08-05 1999-04-06 Cooper Technologies Company Method and apparatus for simultaneously lubricating a cutting point of a tool and controlling the application rate of the tool to a work piece
US6082986A (en) * 1998-08-19 2000-07-04 Cooper Technologies Reversible double-throw air motor
US6217306B1 (en) 1998-08-19 2001-04-17 Cooper Technologies Company Reversible double-throw air motor
US6241500B1 (en) 2000-03-23 2001-06-05 Cooper Brands, Inc. Double-throw air motor with reverse feature
CN102458772A (en) * 2009-06-03 2012-05-16 株式会社空研 Impact wrench
CN102458772B (en) * 2009-06-03 2014-09-10 株式会社空研 Impact wrench

Similar Documents

Publication Publication Date Title
US1343667A (en) Bolting-up device
US3707893A (en) Mechanical speed ratchet
US2716555A (en) Power operated chuck device
US3874460A (en) Impact wrench
US4215594A (en) Torque responsive speed shift mechanism for power tool
US20160001435A1 (en) Positive Feed Tool with a Slip Clutch And A Method, to Prevent Jamming
US4071092A (en) Pneumatic screwdriver with torque responsive shut-off
US3224024A (en) Feed means for plumbers' tool
US1913046A (en) Clutch mechanism
US3477521A (en) Automatic power tool
US4142616A (en) Torque-limiting devices
US2520443A (en) Planetary gear speed wrench
US3937036A (en) Rotary driving tool having a torque responsive clutch
US2482387A (en) Gear-operated double-socket wrench
US3034623A (en) Cam clutch device
US2027534A (en) Stud bolt wrench
US2425793A (en) Impact wrench
US2285638A (en) Impact clutch
US20130161041A1 (en) Apparatus for tightening threaded fasteners
US2808749A (en) Gear operated power wrench
US2787180A (en) Open end ratchet wrenches
US3752278A (en) Improved power operated wrench or screwdriver
US3207237A (en) Apparatus for applying or dislodging screws and similar threaded fasteners
US2555044A (en) Differential mechanism
US2683512A (en) Clutch