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Publication numberUS3713356 A
Publication typeGrant
Publication dateJan 30, 1973
Filing dateJan 18, 1971
Priority dateJan 18, 1971
Publication numberUS 3713356 A, US 3713356A, US-A-3713356, US3713356 A, US3713356A
InventorsKnudsen R
Original AssigneeSnap On Tools Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Socket release mechanism for wrenches and the like
US 3713356 A
Abstract
The invention concerns itself with an improvement in release mechanisms for wrench sockets which are detachably connected to a turning shank such as but not limited to a ratchet driven shank by a spring impelled detent. The spring impelled detent is readily adapted to frictionally hold and retain wrench sockets to a turning shank, but it usually involves the use of two hands to remove such sockets from turning shanks equipped with spring impelled detents, and to obviate this requirement and to afford the ready release of the sockets from their turning shanks with one hand manipulation, and elongated displaceable and combined detent positioning and release member is provided in the turning shank that is simple and serves as a detent camming element cooperating with the detent to displace it relative to the socket recess responsive to finger longitudinal displacement thereof.
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Description  (OCR text may contain errors)

United States Patent [19] Knudsen 1 Jan. 30, 1973 [54] SOCKET RELEASE MECHANISM FOR WRENCHES AND THE LIKE I Primary Examiner-James L. Jones, Jr. [75] inventor; Raymond G. Knudsen, Kenosha, Ammey Ha"y Albem 57 ABSTRACT [73] Asslgnee: snap-0n Tools Corporation The invention concerns itself with an improvement in Kenosha, Wis.

release mechanlsms for wrench sockets which are [22] Filed: Jan. 18, 1971 detachably connected to a turning shank such as but not limited to a ratchet driven shank by a spring im- 107335 pelled detent. The spring impelled detent is readily adapted to frictionally hold and retain wrench sockets [52] US. Cl ..81/177.6, 81/62 to a turning shank, but it usually involves the use of [51] Int. Cl ..B25b 13/00, 8251) 1/00 two hands to remove such sockets from turning shanks Field Search 53 equipped with spring impelled detents, and to obviate 24/2 N; /5 B this requirement and to afford the ready release of the sockets from their turning shanks with one hand [56] References Cited a manipulation, and elongated displaceable and combined detent positioning and release member is pro- UNITED STATES PATENTS vided in the turning shank that is simple and serves as 3,532,013 10/1970 Haznar ..81/177.6 a detent Camming element cooperating with the detent 3,068,737 12/1962 Newse ..24/211 N to displace it relative to the socket recess responsive 3,393,587 7/1968 Jolliff tal ..81/63.2 to finger longitudinal displacement thereof. I 3,438,291 4/1969 Betgquist ..81/62 3,117,484 1/1964 Myers ..85/5.8 1 Claim, 3 Drawing Figures INVENTOR RAYMOND G. KNUDSEN PAIENTEU JAN 3 0 I973 ATTORNEY SOCKET RELEASE MECHANISM FOR WRENCHES AND THE LIKE This invention relates to a simple and effective wrench socket connector and release mechanism which enables the manual positioning control of the detent for ready connection and release of wrench sockets relative to a turning shank.

It contemplates more especially a simple elongated shaft longitudinally displaceable within a turning head to lock and release wrench sockets relative to its turning shank for single-handed turning operation and detent positioning control.

Locking and releasing wrench socket locking and releasing mechanisms are not new in the art, but the provision of a positive wrench socket lock-on and release mechanism involving a single elongated shiftable control shaft capable of sealed confinement in the turning head and manipulated by the finger of the same hand that grasps and turns the head, constitutes an improved adjunct to a ratchet or other type of turning head equipped therewith.

One object of the present invention is to simplify the construction and improve the operation capabilities of the turning head for wrench sockets for varying fastener sizes. I

Another object is to provide a wrench socket connector and release mechanism involving a single elongated shaft mounted for longitudinal displacement within a turning head to control the lock-on and release positioning of wrench sockets relative thereto.

Still another object is to provide a built-in elongated shaft detent positioning control to lock-on and release wrench sockets responsive to the longitudinal displacement thereof relative to the turning socket head within which it is spring mounted.

Other objects and advantages will appear from the following description of an illustrated embodiment thereof.

In the drawing:

FIG. 1 is a plan view of a ratchet wrench with part of the turning head broken away to clarify the showing.

FIG. 2 is a sectional fragmentary view in elevation of the turning head showing the wrench socket detent control mechanism embodying features of the present invention.

FIG. 3 is an enlarged quarter sectional view of the ratchet wheel sub-assembly with the detent control mechanism taken substantially along line Ill-[ll of FIG. 1.

The structure selected for illustration is not intended to serve as a limitation upon the scope or teachings of the invention, but is merely illustrative thereof. There may be considerable variations and adaptations of all or part of the teachings depending upon the dictates of commercial practice. The present embodiment comprises an elongated turning handle and shank 11 which, in this instance, is formed integral with a ratchet housing 12 in which a standard revoluble ratchet wheel 13 is journalled to cooperate with a double-toothed pawl 14 to which a directional positioning lever 15 is attached. A spring impelled ball 16 mounted in the handle shank 11 and extending into the housing 12, en-

connected thereto by means of threaded screw fasteners 18. The pawl lever 15 is positioned in a recess 19 to avoid any appreciable protusion of the lever 15 above the closure plate 17.

A lower closure plate 20 is press-fitted into the bottom of the housing 12 to confront the upper closure plate 17, and these confronting closure plates 17-20 are provided with aligned bores 21-22, respectively, to serve as bearings for the revoluble ratchet wheel 13.

An elongated detent positioning shaft 23 is mounted for longitudinal displacement in 'the bore 23' of the ratchet wheel 13 and its integrally extending axial geometric, in this instance square, turning shank 24 projects downwardly through the housing 12 and its closure and bearing plate 20. The elongated shaft 23 has an elongated peripheral groove 25 proximate to the lower end thereof in the region of the square projecting turning shank 24. The elongated peripheral groove 25 has tapered peripheral shoulders 26-27 to cam a spherical detent ball 28 in and out relative to a confining guide aperture 29 drilled radially through one fiat surface of the projecting turning shank 24 to communicate with the ratchet wheel bore 23' and confront the elongated peripheral groove 25 to expose the ball detent 28 thereto and its extreme peripheral tapered camming shoulders 26-27.

As shown, the shaft 23 has enlarged peripheral and longitudinally spaced shoulders 30-31-32, in this iristance three, serving as an upwardly projecting finger depressing knob 30, an intermediate bearing guide peripheral shoulder 31, and a lowermost bore closure peripheral head 32 to define the lowermost tapered camming surface 26 and substantially close the bottom opening of the bore 23' against the entrance of foreign matter. A compression spring 33 envelops the shaft 23 between the upper head 30 and the intermediate bearing guide shoulder to normally urge the shaft 23 upwardly and displace the detent ball 28 outwardly to lock a standard detachable wrench socket (not shown) thereto. The wrench socket (not shown) has depressed recesses in the four sides of the tubular driving end thereof which is loosely complemental to the turning shank 24 to smoothly slipon and off relative thereto when the upper shaft head or knob 30 is depressed against the upper urge of the spring 33. This can be accomplished with the forefinger of the same operators hand holding the turning shank 11 of the wrenching handle 10.

The depressing displacement of the shaft 23 permits the locking detent ball 28 to move inwardly in the elongated peripheral groove 25, and this will allow the wrench socket to drop off the turning shank 24 or removed by the operators other hand. The depressing displacement should be limited, since the full displacement is only utilized to lock a socket to the turning shank 24 or any extension thereof for retrieving it should one become dislodged in a normally inaccessible location. In order to preclude any foreign matter, oil, and dirt to find access to the shaft top knob 30 and the interior of the ratchet wheel bore or other associated mechanical parts, a yieldable cap seal 34 of neoprene or the like is preformed to fit loosely over the shaft knob 30, and it is flanged as at 35 to provide a peripheral upstanding shoulder 36 for frictional retention in a complementally shaped peripheral groove 37 cut into the upper edge of the ratchet wheel 13.

This expedient will seal the interior and still allow the shaft 23 to be displaced downwardly by the operators finger to release the wrench socket or by extreme displacement to lock a wrench socket thereon for removal from an otherwise inaccessible location or manually apply a wrench socket thereto and allow the spring 23 to raise the shaft 13 so that the lower camming peripheral shoulder 26 will displace the ball detent 28 outwardly to engage and lock a wrench socket thereto (not shown). Should commercial practice so dictate, the peripheral flange 35 of the rubber seal 34, may be positioned into a plain recess 37' which is open at the top to receive a collar 38 for press-fitted engagement therein over the rubber seal flange 35 to retain the seal 34 in position. While the wrench socket locking and release mechanism has been described in connection with a ratchet wrenching device, it can be advantageouslyr used with any turning tool to which wrench sockets are detachably connected.

It should be noted that the illustrated and described preferred embodiments of the invention, are capable of considerable variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

lclaim:

1. A wrench locking and release mechanism in combination with a turning tool having a geometric turning shank thereon, there being a longitudinal bore extending axially in said turning shank a locking detent loosely mounted in a lateral aperture in a wall of said geometric turning shank to communicate with said longitudinal bore therein, a shaft in said longitudinal bore reciprocally mounted therein, there being an elongated groove in said shaft in the region of said locking detent, said longitudinal shaft groove being peripheral around the entire shaft to define circumferential camming shoulders for said locking detent to effect the locking engagement between said turning shank and said socket responsive to the displacement of said-shaft in said'shank bore in either direction, a spring enveloping said shaft in said longitudinal bore to retain said camming shoulder against said detent in one direction of displacement to normally lock the wrench socket to said geometric turning shank, a finger displaceable button head on said shaft extending beyond said longitudinal bore in said turning shank to release said locking pin detent against the urge of said spring irrespective of the relative radial relation between said shaft and locking detent within the full circumferential sweep of said peripheral shaft groove, and a yieldable seal cover over said button head and anchored to said longitudinal shaft bore in the region of said button head to yield within the reciprocal range of said enveloping shaft spring to preclude the entrance of foreign matter into said longitudinal bore.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3068737 *Aug 3, 1959Dec 18, 1962Avdel LtdBall detent coupling device with a rotatable and axially movable operating member
US3117484 *Nov 17, 1958Jan 14, 1964Aerpat AgMovable detent fastener for variable thickness work
US3393587 *Dec 15, 1966Jul 23, 1968Wright Tool And Forge CompanyRatchet wrenches
US3438291 *Jul 19, 1967Apr 15, 1969Pendleton Tool Ind IncSocket release mechanism
US3532013 *May 1, 1968Oct 6, 1970Moore Drop Forging Co IncQuick release mechanism for fine tooth ratchet wrenches
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3945274 *Aug 13, 1975Mar 23, 1976Annett Ii Charles ESpeed wrench
US4187747 *Feb 21, 1978Feb 12, 1980Litton Industrial Products, Inc.Quick release mechanism for socket wrench
US4211127 *Jan 19, 1979Jul 8, 1980Ingersoll-Rand CompanyRatchet wrench reversing mechanism
US4245528 *May 29, 1979Jan 20, 1981Ingersoll-Rand CompanyPush button socket release mechanism
US4508005 *Dec 19, 1983Apr 2, 1985Snap-On Tools CorporationQuick release mechanism for ratchet wrench
US4527499 *May 2, 1983Jul 9, 1985Atecs CorporationAdjustable mast step
US4631988 *Nov 27, 1984Dec 30, 1986Colvin David SReversible ratchet wrench including detent mechanism
US4794828 *Dec 19, 1983Jan 3, 1989Snap-On Tools CorporationQuick release mechanism for ratchet wrench
US4903554 *Jan 4, 1989Feb 27, 1990Colvin David SReversible ratchet wrench with thin head construction
US4993289 *Aug 13, 1990Feb 19, 1991Snap-On Tools CorporationDrive element with drive bore having compound entry surface
US5028181 *May 14, 1990Jul 2, 1991Grumman Aerospace CorporationQuick change right angle and offset drill head
US5386747 *Nov 30, 1993Feb 7, 1995Snap-On IncorporatedQuick release ratchet with safety latch
US6006631 *May 20, 1998Dec 28, 1999Miner; Montie H.Through-hole quick release adapters
US6431031Dec 16, 1999Aug 13, 2002Bobby HuReversible ratcheting tool with a smaller head
US6450066Dec 27, 2001Sep 17, 2002Bobby HuHead of a wrench handle
US6453779Mar 21, 2001Sep 24, 2002Bobby HuPositioning device for a switch member of a reversible ratchet-type wrench
US6457387Mar 13, 2000Oct 1, 2002Bobby HuReversible ratcheting tool with a smaller head and improved driving torque
US6457389Aug 6, 2001Oct 1, 2002Bobby HuSwitching arrangement for a reversible ratchet type wrench
US6520051Jul 1, 2002Feb 18, 2003Bobby HuHead of a wrench handle
US6539825Sep 20, 2001Apr 1, 2003Yen-Wen LinSingle direction ratcheting wrench with stuck prevention and ratcheting direction indication
US6568299Oct 1, 2001May 27, 2003Bobby HuReversible ratcheting tool with a smaller head
US6644148May 13, 2002Nov 11, 2003Bobby HuReversible ratchet-type wrench
US6647832Jul 27, 2001Nov 18, 2003Bobby HuWrench having two rigid supporting areas for a pawl
US6666112Jul 9, 2001Dec 23, 2003Bobby HuSwitching arrangement for a reversible ratchet type wrench
US6666117Oct 15, 2001Dec 23, 2003Bobby HuWrench with a fixed maximum operational torque
US6722234Jun 25, 2001Apr 20, 2004Bobby HuEasy-to-operate and easy-to-assemble ratcheting-type wrench
US6732614May 14, 2001May 11, 2004Bobby HuEasy-to-manufacture and easy-to-assemble ratcheting-type wrench
US6745647Nov 29, 2000Jun 8, 2004Mei-Chen WangWrench having a universal-joint ratchet wheel
US6758641Aug 27, 2001Jul 6, 2004Bobby HuMethod for manufacturing a ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6807882May 8, 2002Oct 26, 2004Bobby HuWrench with a simplified structure
US6945141Apr 22, 2002Sep 20, 2005Bobby HuReversible ratchet type wrench
US6955104Jul 1, 2002Oct 18, 2005Bobby HuReversible ratcheting tool with a smaller head
US6971286Jul 22, 2003Dec 6, 2005Bobby HuRatcheting wrench with quick tightening/loosening functions and fine adjusting functions
US6981435 *May 8, 2003Jan 3, 2006Chih-Ching HsienRatchet wrench having a sealing structure
US7017453Sep 3, 2002Mar 28, 2006Bobby HuReversible ratchet-type wrench
US7032478Jul 6, 2005Apr 25, 2006Bobby HuRatcheting wrench with quick tightening/loosening functions and fine adjusting functions
US7114705Feb 16, 2005Oct 3, 2006Steiner Donald JGrab-activated self-locking winch handle
US7178429Dec 12, 2002Feb 20, 2007Yen-Wen LinEasy-to-assemble ratcheting tool
US7234372Aug 15, 2002Jun 26, 2007Bobby HuReversible ratcheting tool with a smaller head and improved driving torque
US7237460Aug 29, 2001Jul 3, 2007Bobby HuBiasing arrangement for a pawl of a reversible ratchet-type wrench
US7353735Jun 2, 2005Apr 8, 2008The Stanley WorksRatchet wrench
US20040016322 *Jul 17, 2003Jan 29, 2004Bobby HuReversible ratcheting tool with a smaller head and improved driving torque
US20040055422 *Dec 12, 2002Mar 25, 2004Yen-Wen LinEasy-to-assemble ratcheting tool
US20040055423 *Sep 25, 2003Mar 25, 2004Bobby HuReversible ratcheting tool with a smaller head and improved driving torque
US20040093995 *Jul 22, 2003May 20, 2004Bobby HuRatcheting wrench with quick tightening/loosening functions and fine adjusting functions
US20040139823 *Jan 5, 2004Jul 22, 2004Bobby HuBiasing arrangement for a pawl of a reversible ratchet-type wrench
US20040221687 *May 8, 2003Nov 11, 2004Chih-Ching HsienRatchet wrench having a sealing structure
US20050229739 *Feb 16, 2005Oct 20, 2005Steiner Donald JGrab-activated self-locking winch handle
US20050229751 *Jul 6, 2005Oct 20, 2005Bobby HuRatcheting wrench with quick tightening/loosening functions and fine adjusting functions
US20060272455 *Jun 2, 2005Dec 7, 2006The Stanley WorksRatchet wrench
USRE43286Nov 21, 2002Apr 3, 2012Bobby HuRatchet 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
CN101885168A *Jul 29, 2010Nov 17, 2010孙成纲Ratchet wrench
CN103786134A *Mar 6, 2014May 14, 2014无锡福镁轻合金科技有限公司Labor-saving spanner safety hammer
CN103786134B *Mar 6, 2014Feb 24, 2016无锡福镁轻合金科技有限公司省力扳手安全锤
EP0066710A2 *May 3, 1982Dec 15, 1982Peter M. RobertsQuick-release and positive locking mechanism for use on socket wrenches and on power and impact tools
WO1982004215A1 *Mar 31, 1982Dec 9, 1982Peter M RobertsQuick-release and positive locking mechanism for use on socket wrenches and on power and impact tools
WO1986003155A1 *Nov 27, 1984Jun 5, 1986Colvin David SReversible ratchet wrench
Classifications
U.S. Classification81/177.85, 81/62
International ClassificationB25B23/00, B25B23/143, B25B23/14
Cooperative ClassificationB25B23/0035
European ClassificationB25B23/00A4