Machine element or mechanism – Gearing – Interchangeably locked
Patent
1981-08-14
1984-02-28
Herrmann, Allan D.
Machine element or mechanism
Gearing
Interchangeably locked
74396, 74421R, 74438, 83788, F16H 3506, F16H 112, F16H 5517
Patent
active
044335890
ABSTRACT:
A power tool, is adapted to be driven by an external drive means such as a portable, hand held drill, through a novel gear reduction arrangement in which a selected pinion gear and an idler gear are supported between a gear case cover and the tool frame. The gear reduction arrangement provides for a gear case cover having a support position for a pinion and a plurality of support positions for the idler gear. The idler gear support positions are placed at varying distances from the pinion gear position to accommodate pinion gears of various sizes and numbers of teeth, thereby to permit the tool to be operated at a plurality of gear reduction ratios.
REFERENCES:
patent: 363776 (1887-05-01), Sweet
patent: 415755 (1889-11-01), Whiteley
patent: 1297462 (1919-03-01), Hallenbeck
patent: 1349958 (1920-08-01), Head
patent: 2436746 (1948-02-01), Drought
patent: 2625964 (1953-01-01), Green et al.
patent: 2798518 (1957-07-01), Gray
patent: 3390598 (1968-07-01), Sands et al.
patent: 3961550 (1976-06-01), Oliver
Black & Decker Inc.
Herrmann Allan D.
Sherer Ronald B.
Weinstein Harold
Wojciechowski Bruce
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