Screw driver with retractable lever attachment

• US 4,196,761 A
• Filed: 02/12/1979
• Issued: 04/08/1980
• Est. Priority Date: 02/12/1979
• Status: Expired due to Term

• Current Assignee: George R. Royer
• Original Assignee: George R. Royer
• Inventors: Royer, George R.
• Primary Examiner(s): Simpson, Othell M.
• Assistant Examiner(s): Zatarga, J. T.
• Application Number:
  US06/011,377
• Time in Patent Office: 421 Days
• Field of Search: 145/61 L, 145/61 G
• US Class Current: 81/177.1
• CPC Class Codes: B25G 1/005 for screwdrivers, wrenches or spanners with additional levers, e.g. for increasing torque

Abstract

A screw driver with a retractable lever member, said lever member being adapted, when moved to its extended position, to yield increased leverage for the user so as to improve the turning movement in the process of either tightening or loosening a screw or other similar object.

Claims

1. An auxiliary handle attachment for a screw driver with a working shaft on the front end of said screw driver and a handle member of the posterior end of said screw driver, and wherein said handle member and working shaft are coaxially aligned, said auxiliary handle attachment comprising:

(a) a longitudinally extending arm member one end of which is pivotally mounted to said handle member on said screw driver;

(b) pivot means on the handle member of said screw driver to allow said arm member to move to a position wherein said arm member is perpendicular to the working shaft of said screw driver and back to a position aligned along said handle member;

(c) knob extension means integrally affixed on the most rearward extreme of said handle member with the frontal portion of said knob extension having an annular depression extending around the periphery of the frontal portion of said knob extension;

(d) spring clip loop means pivotally mounted on the end of the longitudinally extending arm, which end is axially opposite the end on which said pivot means is affixed, said spring clip loop means having an inner diameter which is larger than the diameter of the said knob extension;

(e) pivot means on said longitudinally extending arm member to allow pivotable movememt of said loop means into engagement over said knob extension and onto said annular depression.