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Publication numberUS2775276 A
Publication typeGrant
Publication dateDec 25, 1956
Filing dateJul 20, 1954
Priority dateJul 20, 1954
Publication numberUS 2775276 A, US 2775276A, US-A-2775276, US2775276 A, US2775276A
InventorsRossner Albert G
Original AssigneeRossner Albert G
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Handle for screw drivers or the like
US 2775276 A
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Description  (OCR text may contain errors)

. A. G. RossNER HANDLE FOR SCREW DRIVERS OR THE LIKE Filed July 20. 1954 Dec. 25, 1956 Albert 6. Rassner INVENTOR.

' 1 By gum only 5.

United States Patent HANDLE FOR SCREW DRIVERS OR THE LIKE 7 Albert G. Rossner, Westminster, Mass.

Application July 20, 1954, Serial No. 444,540

1 Claim. (Cl. 145-61) The present invention relates to new and useful improvements in tool handles for use with screw driver and other tools where a turning movement is imparted to objects engaged by the tool.

An important object of the present invention is to provide a handle composed of a main tool turning portion and a cap portion at the rear end ofthe handle and which is engaged by the palm of the hand and remains stationary therein while the tool is being turned to enable the tool to be subjected to constant pressure by the hand of the person.

Another object of the invention is to provide novel pivotal connecting means for the cap portion of the handle and constructed to reduce friction during relative turning movement of one part of :the handle with respect to the other.

A still further object is to provide a tool of this character of simple and practical construction, which is effi cient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purpose for which the same is intended.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a .part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a perspective view;

Figure 2 is an enlarged fragmentary longitudinal sec tional view taken on the line 2-2 of Figure 1; and

Figure 3 is a group perspective view of the pivotal connecting means for the cap portion of the handle.

Referring now to the drawing in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of invention the numeral 5 designates the blade or shank portion of a screw driver to which a main handle portion 6 is rigidly secured. The handle 6 may be of plastic or other suitable material.

The rear end portion of the main handle 6 is formed with a longitudinally extending bore 7 in which one end of a pivot pin or shaft 8 is secured with a pressed fit or otherwise suitably secured in a fixed position to the handle. The other end of the shaft pin 8 projects rearwardly beyond the handle 6 and is provided with a conical diametrically enlarged head 9 to provide a shoulder 10 on a flange portion 11 and a conical tip 12.

A cap 13 is constructed of material similar to the main handle 6 and is formed with a bore 14 in which a buslr ing 15 is retained by a pressed fit or otherwise suitably secured in a fixed position in the cap. The rear end of the bushing 15 is formed with a counterbore 16 to accommodate the flange 11 of the head 9 of the pin or 2,775,276 Patented Dec. 25, 1956 ice shaft 8 and with suflicient clearance to reduce friction to a minimum during rotation of the cap on the pin or shaft.

The rear end of the bore 14 is closed and is formed with a conical counterbore 17 to accommodate the conical tip 12 of the head 9 of the pin or shaft 8. The counterbore 17 is constructed of sufiicient depth to provide clearance between the tip 12 and the counterbore so that contact of the head 9 with the counterbore 17 is limited to the shoulder 18 at the periphery of flange 11 and at the point where the tip 12 merges with the flange.

By reason of the reduced contacting area between the head 9 of the pin or shaft 8 and the counterbore 17 in the cap 13 friction is reduced to a minimum during rotation of the cap on the pin.

Clearance is also provided between the rear end of the handle 6 and the cap 13, as indicated at 19, to further reduce friction during the rotation of the cap.

In the operation of the device the fingers of a person grip the main portion 6 of the handle while the palm of the hand bears against the cap 13. Accordingly, the main handle portion 6 and blade 5 are free to turn while the cap 13 remains stationary so that constant pressure may be subjected to the tool while the same is being turned.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readly occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, .and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claim.

What is claimed as new is as follows:

A tool handle comprising a main handle part, a cap at the rear end of the main handle part, and means rotatably connecting the cap to the main handle part and including a pin having one end anchored axially in the main handle part and projecting rearwardly therefrom, .a diametrically enlarged flange on the rear end of the pin, said cap having a dead end bore in which the pin is received in a concealed position and said bore having an inwardly tapering counterbore at its dead end overlying the flange and in which the flange is received the surface of said tapered counterbore being arranged at an angle to the periphery of the flange and with the rear corner only of the flange in contact with the tapered surface of the counterbore to reduce the point of contact of the flange therewith to a minimum, and a bushing fixed in the bore of the cap and behind which the flange is positioned to retain the cap on the pin.

References Cited in the file of this patent UNITED STATES PATENTS 39,151 King July 7, 1863 139,876 Daboll June 17, 1873 470,687 Koelzer Mar. 15, 1892 1,643,901 Peterson Sept. 27, 1927 1,752,703 Simpson Apr. 1, 1930 2,324,839 Haumerson July 20, 1943 2,351,705 Prall June 20, 1944 2,564,356 Diand-a Aug. 14, 1951 FOREIGN PATENTS 620,451 Great Britain Mar. 24, 1949

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US39151 *Jul 7, 1863 Improved bit-stock
US139876 *Mar 29, 1873Jun 17, 1873 Improvement in bit-stocks
US470687 *Sep 7, 1891Mar 15, 1892 Screw-driver
US1643901 *Aug 8, 1925Sep 27, 1927Peterson John NSocket wrench
US1752703 *Jun 12, 1928Apr 1, 1930Simson Herbert EHand drill or screw driver
US2324839 *Feb 12, 1941Jul 20, 1943Haumerson Clifford CTool handle
US2351705 *Dec 9, 1942Jun 20, 1944Gustav PrallScrew driver
US2564356 *Nov 12, 1948Aug 14, 1951Dianda Arthur EHandle for screw drivers and other hand tools
GB620451A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3343577 *Aug 8, 1966Sep 26, 1967Watsco IncSwivel top ratchet driver
US4093008 *Mar 21, 1977Jun 6, 1978Lino MartinScrew driver having capped handle with rotable cap
US4763548 *Oct 15, 1986Aug 16, 1988Oswald Leibinger GmbhScrewdriver, particularly for surgical purposes
US4819535 *Sep 25, 1987Apr 11, 1989Thomas Carroll MGlass cutting apparatus
US5349886 *Jul 22, 1993Sep 27, 1994Jin Soo WHand screw driver
US5431075 *Mar 31, 1994Jul 11, 1995Jose A. CruzSwivel head screwdriver
US7662158 *Apr 14, 2005Feb 16, 2010Robinson Merle WWire twisting driver tool
US7958804Dec 8, 2008Jun 14, 2011Custom Spec Engineering, Inc.Screwdriver handle having removable rotating cap
US8157828Sep 24, 2008Apr 17, 2012MRI Interventions, Inc.Surgical marking tools and methods for marking a patient
US8460328Mar 15, 2012Jun 11, 2013MRI Interventions, Inc.Surgical marking tools and methods for marking a patient
WO2001074543A1 *Apr 5, 2000Oct 11, 2001Ofentavsek TonePrecision screw-driver with a rotary cap
WO2009042160A1 *Sep 24, 2008Apr 2, 2009Surgivision IncSurgical marking tools and methods for marking a patient
Classifications
U.S. Classification81/177.1
International ClassificationB25G1/00, B25G1/04
Cooperative ClassificationB25G1/046
European ClassificationB25G1/04S1