US 2775276 A
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