Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Patent
1981-12-10
1984-05-15
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
81439, 81 62, B25B 1346
Patent
active
044480970
ABSTRACT:
A driver tool utilizing a sleeve which fits within and rotates with an elongated shaft. Driving bits are held to the sleeve and turned by the action of the rotating shaft. A handle which is expandable connects to the elongated shaft.
REFERENCES:
patent: 814020 (1906-03-01), Clifford
patent: 844061 (1907-02-01), Van Valkenburg
patent: 1119290 (1914-12-01), Lachman
patent: 1296416 (1919-03-01), Maddox
patent: 1747647 (1930-02-01), Racicot
patent: 2596594 (1952-05-01), Petre
patent: 3061061 (1962-10-01), Browning
patent: 3568899 (1971-03-01), Rosenberg
patent: 4086831 (1978-05-01), Smith
Cohen Howard
Schad Steven P.
Schmidt Frederick R.
Zimmerman Harris
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