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Publication numberUS3130762 A
Publication typeGrant
Publication dateApr 28, 1964
Filing dateJun 21, 1961
Priority dateJun 21, 1961
Publication numberUS 3130762 A, US 3130762A, US-A-3130762, US3130762 A, US3130762A
InventorsHenry K Kerr
Original AssigneeHenry K Kerr
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hammer with detachable striking head faces
US 3130762 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

H. K. KERR 3,130,762

HAMMER WITH DETACHABLE STRIKING HEAD FACES April 28, 1964 Filed June 21, 1961 r .w w V m Attorney United States Patent This invention relates to hand tools. It is directed to a hammer having detachable and renewable striking faces, particularly of the type composed of a relatively soft metal, plastic, or other suitable material, whereby operations can be performed on articles, parts of machinery, sheet metal parts, such as automobile bodies, aircraft and the like, or in driving studs, bolts or shafts which have threaded portions, without marring the surface and without impact damage to the parts.

Hammers having soft, detachable face or striking surfaces formed of rubber or soft metals or other materials are known in the tool art. A diificulty with such hammers is that usually they are of relatively light weight and are not capable of delivering heavy blows against the surface being struck except by increasing the length of the strokes which tends to detract from desired accuracy in the use of the tool.

An important object of this invention is to provide a hammer having detachable striking faces formed of soft material, such as rubber, plastic, soft metal or the like, spaced at opposite ends of the head and separated by and secured to a cylinder which contains a predetermined amount of heavy, weight imparting material.

An understanding of the construction of the hammer which forms the subject matter of this invention can be obtained from the following description, reference being made to the accompanying drawing, in which:

FIGURE 1 is a perspective View in section of a hammer having detachable striking faces which incorporates the improvement of this invention;

FIGURE 2 is an exploded view of the head and handle assembly; and

FIGURE 3 is an enlarged view in section of the chamber which contains a predetermined amount of weight imparting material.

Like reference characters refer to like parts through the following description and attached drawing.

Referring to FIGURE 1, the numeral indicates the handle 11 which is integral with the head portion 12. It may be formed of metal or plastic material. Preferably, it is formed of a light metal such as aluminum or an aluminum alloy. The handle is formed with a hand gripping end 11 and a hollow head portion 12 at the opposite end which extends at right angles to the long axis of the handle. Preferably, this head portion 12 is cylindrical in shape and terminates, at each end 13-14, in outwardly extending lips or flanges 1516 adapted to provide seats and alignment for the detachable striking faces 1718 described hereinafter.

The striking faces are similar in design and formed of the same or similar materials although in modifications of the device, one or both of the faces may be formed of a relatively soft, non-surface marring material such as rubber, plastic or soft metal or of harder conventional hammer head material such as steel. Each striking face is circular in shape and formed with a striking surface 1920 carried by a Wall 21-22 which is formed to over- 3,130,762 Patented Apr. 28, 1964 lCe lie the flange 1516 and seat against the opposing face of the hammer head.

Each striking face is formed or provided with an internally threaded bore 2324. Striking faces, if made from material other than metal, may have a threaded insert cast or moulded within the face material to avoid having the threds tear out under usage. The outer surface of the insert is preferably knurled or flanged to ensure retention of the insert within the striking face.

A hollow cylinder 25 is shaped to fit snugly Within the hollow handle head 12 between the exterior ends thereof. This cylinder is formed or provided at its ends with outwardly extending threaded studs 2627 which are adapted to be threaded into the internally threaded bores 2324 of the striking heads.

Provision is made to fill the cylinder 25 with a predetermined amount of weight imparting material 30. Mercury and lead shot are suitable weight imparting materials but it will be understood that other material can be used if desired. In the modification illustrated in the drawing, the stud 27 is formed with a passageway 28 which extends to the body of the cylinder to permit the entry of loading material thereinto. This passage 28 is closed, at its exterior end, by a removable plug 29.

The improved hammer of this invention possesses several important advantages. It can be manufactured with detachable striking faces of conventional material, such as steel, or striking faces formed of non-surface marring or damaging materials. Weight is provided adjacent to the striking tip or head thereby permitting heavy blows of short stroke and maximum accuracy. The cylinder 25 can be filled completely with a weight imparting material 30 such as mercury or lead shot thus to produce maximum hammer weight adjacent to the striking head with minimum external dimensions. Alternatively, the cylinder can be only partially filled with weight imparting material thus to obtain optimum striking force with minimum hammer rebound.

It will be understood, of course, that modifications can be made in the embodiment of the invention described herein without departing from the scope of the invention defined by the appended claim.

What I claim as new and desire to protect by Letters Patent of the United States is:

A hand tool which comprises a handle, a hollow head terminating in open ends extending transversely of one end of said handle and integral therewith, a hollow cylinder fittaible in snug fitting relationship in said hollow head having closable means for admitting Weight imparting material into said cylinder, a threaded stud extending from each end of said cylinder beyond the open ends of said hollow head, a pair of striking faces, and threaded means carried internally by each of said striking faces securable in tight fitting relationship to said threaded studs.

References Cited in the file of this patent UNITED STATES PATENTS 2,604,914 Kahlen July 29, 1952 2,808,861 Hughes Oct. 8, 1957 2,989,101 Carmien June 20, 1961 FOREIGN PATENTS 582,877 Great Britain Nov. 29, 1946

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2604914 *Jan 9, 1950Jul 29, 1952Kahlen Johannes WilliamHammer head having reboundpreventing means
US2808861 *Jan 25, 1954Oct 8, 1957Robert W HughesHammer with detachable striking tips
US2989101 *Aug 1, 1958Jun 20, 1961New Plastic CorpHammers
GB582877A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3343576 *Dec 20, 1965Sep 26, 1967Vaughan & Bushnell Mfg CoDead-blow hammer head
US3395767 *Oct 23, 1965Aug 6, 1968John E. BardwellMercury chatter hammer
US3456330 *Feb 16, 1967Jul 22, 1969Vaughan & Bushnell Mfg CoMethod of making and assembling a dead-blow hammerhead
US3942567 *Aug 14, 1974Mar 9, 1976Zephyr Industries, Inc.Cast aluminum alloy hammer
US4039012 *Jan 12, 1976Aug 2, 1977C. E. S., Inc.Non-rebound hammer
US4057250 *Sep 5, 1975Nov 8, 1977Kuban William GTennis racket construction
US4135720 *Sep 3, 1976Jan 23, 1979Lancellotti William EGolf putter practice device
US4182512 *Sep 22, 1976Jan 8, 1980Kuebler & Co.Racket for playing tennis or similar ball games
US4393908 *Apr 29, 1981Jul 19, 1983Clay Howard WHammer with two detachable heads
US4831901 *May 23, 1988May 23, 1989Kinne Arnold LCarpenters hammer double jolt
US4882955 *May 26, 1987Nov 28, 1989Davorin SavnikAngled head hammer
US5009433 *Dec 1, 1989Apr 23, 1991Reid Alexander DDart for aiming at a game board
US6311582 *Oct 26, 2000Nov 6, 2001Howard ChowDeadblow claw hammer
US6449789May 18, 2000Sep 17, 2002Daimlerchrysler CorporationAutomotive vehicle door and lock striker adjustment tool
US6595087Nov 21, 2001Jul 22, 2003Snap-On Technologies, Inc.Encapsulated dead blow hammer with improved skeleton
US6640447Dec 18, 2001Nov 4, 2003Kenneth K. WicklineDead-blow recoilless axe
US6904829 *Sep 17, 2002Jun 14, 2005Anthony KrallmanDeadblow hammer
US6928899 *May 12, 2004Aug 16, 2005Ming-Hsuan LinStriking head-interchangeable hammer with a stress-distributable fastener
US7134363Apr 13, 2005Nov 14, 2006Anthony KrallmanDeadblow hammer
US8047099May 5, 2009Nov 1, 2011Stanley Black & Decker, Inc.Large strike face hammer
US8261634Sep 11, 2012Stanley Black & Decker, Inc.Large strike face hammer
US9016172 *May 29, 2013Apr 28, 2015Ying-Chieh LiaoHammer
US20040050214 *Sep 17, 2002Mar 18, 2004Anthony KrallmanDeadblow hammer
US20050193868 *Apr 13, 2005Sep 8, 2005Anthony KrallmanDeadblow hammer
US20060090605 *Nov 3, 2004May 4, 2006The Faucet Queens, Inc.Hammer with mallet head and measuring handle
US20070051207 *Nov 9, 2006Mar 8, 2007Anthony KrallmanDeadblow hammer
US20070193824 *Feb 16, 2007Aug 23, 2007Anderson Patrick KLadder safety apparatus
US20100199809 *Aug 12, 2010The Stanley WorksLarge strike face hammer
US20140352498 *May 29, 2013Dec 4, 2014Ying-Chieh LiaoHammer
US20150143959 *Nov 26, 2013May 28, 2015Shou King Enterprise Co., Ltd.Striking tool
EP2140990A1 *Jun 30, 2009Jan 6, 2010Fiskars Brands FranceTool with an interchangeable striking head
EP2216140A2 *Feb 8, 2010Aug 11, 2010The Stanley WorksLarge Strike Face Hammer
EP2216140A3 *Feb 8, 2010Sep 15, 2010The Stanley WorksLarge Strike Face Hammer
WO2004026532A1 *Jul 31, 2003Apr 1, 2004Anthony KrallmanDeadblow hammer
WO2004058456A1 *Dec 22, 2003Jul 15, 2004Renault S.A.S.Sheet metal-shaping mallet
WO2015134106A1 *Dec 31, 2014Sep 11, 2015Estwing Manufacturing Company, Inc.Aluminum striking tools
U.S. Classification81/25, 81/26, 473/329, 81/19
International ClassificationB25D1/12, B25D1/02
Cooperative ClassificationB25D2222/42, B25D1/02, B25D2222/39, B25D2250/361, B25D2250/105, B25D2222/57, B25D2222/54, B25D1/12
European ClassificationB25D1/12, B25D1/02