Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Patent
1992-11-13
1994-02-15
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
16115, 403109, B25B 1300
Patent
active
052857026
ABSTRACT:
An extendible handle for a tool to permit the user to increase the leverage applied by the tool. The extendible handle assembly has an inner handle member with a bushing affixed to its outer end. An outer handle member slides over the inner handle member and the outer handle member is hollow and contacts the bushing at the end of the internal handle. A bushing is also affixed to the inner end of the outer handle so that the handle cannot extend past the bushing on the inner handle. An air tight rearward air chamber is positioned between the outer end of the outer handle and an airtight forward chamber is formed between the internal bushing and the tool and bushing. An air passageway is provided along the internal bushing so that as the outer handle is moved in or out, this movement is damped by the necessity of air having to pass through the air passage in the internal bushing.
REFERENCES:
patent: 2641012 (1953-06-01), Storrs
patent: 2869410 (1959-01-01), Prichard
patent: 4581958 (1986-04-01), Shull
patent: 5109737 (1992-05-01), Raber
Averill, Jr. Edgar W.
Smith James G.
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