Leverage screwdriver

Details Leverage screwdriver Leverage screwdriver

1975-10-09

1977-01-04

Smith, Al Lawrence

Bridges

145 50B, B25G 100, B25G 112

Patent

active

040007677

ABSTRACT:
A leverage screwdriver assembly with a screw-driving tool receivably held at one end thereof within a drilled axial hole in the end of a gripping handle has a leverage handle pivotally secured to the gripping handle by means of coupling engagement therewith through a pivot member extending transversely through the axial hole. The pivot member, in addition to pivotally coupling the leverage and gripping handles, engages a bearing surface of the tool within the hole to restrain it against both longitudinal and rotary motion relative to the gripping handle.

REFERENCES:
patent: D142982 (1945-11-01), Bloomfield
patent: 508706 (1893-11-01), Hand
patent: 699773 (1902-05-01), Stump
patent: 722332 (1903-03-01), Stump
patent: 988192 (1911-03-01), Hetherington
patent: 1082379 (1913-12-01), West
patent: 1243667 (1917-10-01), Ard
patent: 2182673 (1939-12-01), Magnano
patent: 2241965 (1941-05-01), Sjobring
patent: 3863693 (1975-02-01), Carriker

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