Ralph P Lydon

US Patent:

40588840, Nov 22, 1977

Filed:

Oct 18, 1976

Appl. No.:

5/733287

Inventors:

Ralph P. Lydon - Wauwatosa WI
William A. Weismueller - Oostburg WI

International Classification:

B25B 2308
B23P 1906

US Classification:

29526R

Abstract:

An improved pneumatically operated automatic screw driver system for affixing screw devices into objects. The inverted screw-driving system utilizes a locator guide and locator to pre-position and align a screw device relative to the object that is being driven into. Drawing the object against the locator and the pre-positioned screw automatically imparts rotation to the aligned screw even before contact is made between the screw and the object. The construction of the locator and locator guide is such to absorb the initial torque developed by the driver, and the locator is spring-loaded within the locator guide so as to maintain the driver in the operably "off" position until the locator guide is depressed to activate the air motor and thus rotate the screw device.