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Publication numberUS2491129 A
Publication typeGrant
Publication dateDec 13, 1949
Filing dateJul 23, 1948
Priority dateJul 23, 1948
Publication numberUS 2491129 A, US 2491129A, US-A-2491129, US2491129 A, US2491129A
InventorsMenne Nieuwsma
Original AssigneeMenne Nieuwsma
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Grip claw hammer
US 2491129 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Dec. 13, 1949 M. NIEUWSMA GRIP CLAW HAMMER Filed July 25, 1948 WEWWM -W Patented Dec. 13, 1949 iJNITED STATES PATENT OFFICE GRIP CLAW HAMMER Menne Nieuwsma, Herreid, S. Dak.

Application July 23, 1948, Serial No. 40,339

3 Claims.

,for increasing the effectiveness and range of the use thereof.

The main object of my invention is to provide a claw hammer with means for increasing the capacity thereof for removing long nails, and provide an improved grip thereon.

Another object is to provide a claw hammer with an auxiliary member which serves to engage simultaneously with a nail when also engaged by the claw equipment of the hammer, for obtaining a sure grip upon the nail.

A further object is to have such a hammer provided with an integral ring or yoke member spaced within the claws of the hammer for bending and biasing a nail into efiective gripping relation with said jaws.

An object of the invention is also to have a claw hammer so self-contained and equipped that it is capable of drawing even long and tough nails in two stages, first, to start the nail, and then to draw it completely out.

It is likewise an object to produce a special claw hammer, as already outlined, which is practical, durable and uniformly effective to draw nails of substantially any size or length without using blocks beneath the claws, and which is also capable in every way of normal use as an ordinary claw hammer.

Other objects and the advantages of my invention will appear in further detail as the specification proceeds.

In order to facilitate ready comprehension of this invention for a proper appreciation of the salient features thereof, the invention is illustrated on the accompanying drawing forming part hereof, and in which:

Figure 1 is a side elevation of a claw hammer made according to the invention and embodyingthe same in a practical form, the hammer being in proper position for drawing a long nail While a portion of the handle only is shown in order to reduce the view to reasonable proportions;

Figure 2 is an elevation of the hammer head of the hammer also shown in Figure 1, as seen from the inner or handle end in order to display the relations between the parts thereof;

Figure 3 is a vertical section taken on line 3-3 in Figure 2.

The same reference numerals are used to indicate the same parts throughout these views.

To carpenters, workmen and others who have occasion to use claw hammers, it is a familiar experience to find that the hammer is only capable 2' of starting the withdrawal of a nail, so that a block of wood must be placed under the hammer to pull the nail the rest of the way out. This situation is usually accepted as necessary, inasmuch as no means has been adopted generally to avoid such expedients. However, after considering this problem, it has occurred to me that a claw hammer should be permanently equipped with means thereon for facilitating the use of the hammer not only for starting the withdrawal of a nail, but also for pulling it completely out, and as a result I have succeeded in evolving a special claw hammer with self-containedmeans for starting and also fully withdrawing any nail which the claws thereof are capable of engaging, as will now be set forth in detail.

Hence, in the practice'of my invention, and referring again to the drawing, the handle 4, which is only partly shown, projects in more or less conventional manner into a hammer head socket 5 of a hammer head generally indicated at 6, and having a conventional hammer anvil 1, while upon the opposite side or end of the hammer head are a pair of more or less conventional claws 8, 8, as best seen in Figure 2, with a wedge-shaped opening 9 therebetween. The claws 8, 8 are externally curved into conventional arcuate form andare therefore capable of engaging beneath the head of a nail, as indicated in broken lines at ID in Figure 1.

Upon the hammer head intermediate the outer end ll, carrying the hammer anvil 1, and the claws 8, 8, and the inner end l2 of the socket 5, is integrally mounted a yoke or ring member generally indicated at 13, consisting of a pair of side arms [4, M which are arched rearwardly of the claws 8, 8 and at their outer ends united by means of an integral cross-piece l5 which is located a shorter distance from the socket 5 than the outer tips or ends of the claws 8, 8.

The arrangement is such that, viewing Figure 1 for example, the hammer is placed with the head 6 thereof in such position that the claws 8, 8 will straddle the nail II] by the latter projecting up through the wedge-shaped slot 9 between them and the handles 4 thrown to the right so that the head 10 of the nail to be drawn is started and pulled a distance out from the wood or other material 16. Assuming that the nail has been pulled sufl'lciently far out to bring the head thereof above the point at which the claws 8, 8 are further efiective, the head is removed momentarily and the yoke or ring portion 13 disposed about the shank I! of the nail shown in full lines, and

the claws again being brought to bear by means of handle 4, the nail shank l1 will be engaged by the interior portion it of the cross-member l5 and thereby wedged between the claws 8, 8 to render positively efiective the wedging grip of these claws upon the nail, even to the point of bending the nail as indicated at l9, when it will be found that the claws will grip the nail shank sufficiently to be effective to pull the nail the entire distance out of the wood lit. The crosspiece IE is thus "effective to bias the nail into effective contact with the claws so that it is entirely unnecessary for either the claws or any part of the yoke to engage beneath the head IQ of the nail shown in full lines in order to ellfect removal of the nail.

Obviously, the hammer head thus provided with biasing means for forcing 31415.11 into effective gripping relation with the claws of the hammer may be made in several sizes and different proportions, and it is also true that the actual form of the claws and 'even or the yoke member 1'3 may *be varied to suit conditions.

Manifestly, variations may be resorted to and parts and features may' be modified orused without others within the sco e or the ap ended claims.

Having now fully described my invention, 1


1. In a grip claw hammer comprising a hammer head having a handle socket adapted "to receive a handle, 'a hammer anvil upon pne portion and a pair of rearwardly-directed nail-pull 'i'ng claws upon another portion, the improvement which includes 'a closed yoke or ring member rigidly mounted u on the hammer head and projecting independently rearward intermediate 'theclaws and the handleend e'ithe handle socket at a generally-inclined angu1ar1 osi'tion with respect to the latter and including u on the outer and a pair of rearwardly-inclined nail-pulling claws upon another portion, the improvement which includes a closed yoke or ring member rigidly mounted upon the hammer head intermediate the handle and the end of the handle socket and the claws, said yoke or ring member including a pair of integral arms projecting freely and independently rearwardly intermediate the claws and the handle socket at a generally-inclined angular position with respect to the latter. and a transverse cross-piece integrally connecting the outer ends of said arms and disposed intermediate the free ends of the claws and the handle and of said handle socket in effective position to bias a nail into wedged gripping relation with said claws when said yoke envelops the nail 3. In a grip claw hammer comprising a hammerhead having a handle socket adapted to receive a handle, a hammer anvil upon one portion and 'a'p'a'ir of rearwardly 'directetl arcuate nailpullin claws upon ai'i'other portion, the improve ment which includes an 'arcuate closed yoke or ring member integrally mounted upon the hairlmer head interinediaite the handle end of the handle socket and "the claws and comprising t. pair of integral curved arms freely directed arcuately rearward "intermediate the claws and the handle socket at a generally-inclined angular position with respect "to "the latter, and a transverse cross-"piece integrally connecting the outer free ends of said curve-d arms and disposed intermediate the free ends of the claws and the handle end of the handle socket in eifeet'i've "position to bias a nailinto wedged'gripping relation with said claws when said yoke 'enveiops "the nail while said cross-piece engages against the latter.

Number Name Date 835,961 Lee u .-wc-=n ==s Nov. .13, 1903 ilisassa Haight eel-i- Nov. 9. 191 5 1 934 680 Bosco a aaacsr-z Nov. 14, A933

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US835961 *Mar 31, 1906Nov 13, 1906John W KeyWire-stretcher.
US1159583 *Feb 19, 1912Nov 9, 1915William H HaightHammer.
US1934680 *Apr 19, 1932Nov 14, 1933Giovanni BoscoClaw hammer
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2920869 *Oct 17, 1957Jan 12, 1960Shelton Leslie CClaw hammer
US7621503Jul 5, 2005Nov 24, 2009Nightshift Group, LlcMultipurpose hammer
US8024994Jun 26, 2007Sep 27, 2011Stanley Black & Decker, Inc.Demolition utility tool
US8113488 *Mar 30, 2006Feb 14, 2012Stewart David WHammer and hammer head having a frontal extractor
US8117702Mar 29, 2006Feb 21, 2012Stanley Black & Decker, Inc.Demolition tool
US8585016Sep 19, 2008Nov 19, 2013Stanley Black & Decker, Inc.Demolition tool
US20060214145 *Mar 30, 2006Sep 28, 2006Stewart David WHammer and hammer head having a frontal extractor
US20070006686 *Jul 5, 2005Jan 11, 2007Jon WarrenMultipurpose hammer
US20070226913 *Mar 29, 2006Oct 4, 2007Stanley Tools And HardwareDemolition tool
US20090000039 *Jun 26, 2007Jan 1, 2009The Stanley WorksDemolition utility tool
US20090008617 *Sep 19, 2008Jan 8, 2009The Stanley WorksDemolition tool
US20100038608 *Aug 18, 2008Feb 18, 2010Degennaro SergioClaw hammer with nail ejector
U.S. Classification254/26.00R, D08/79
International ClassificationB25D1/00, B25D1/04
Cooperative ClassificationB25D1/04
European ClassificationB25D1/04