Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1980-05-05
1982-06-15
Staab, Lawrence J.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74405, 173 50, 173, F16H 5700, F16H 3706
Patent
active
043344399
ABSTRACT:
A power transmission device for enabling each of a plurality of separate tools having a respective operating gear and an associated power-transmitting wire connected thereto, to be selectively coupled to a main drive gear. The device includes a housing in which the operating gears and a like plurality of associated gear shifting units are spaced circumferentially about the centrally located main drive gear. Each gear shifting unit includes a stationary tubular column, a non-rotatable but axially displaceable and upwardly spring-biased tubular rod which rotatably supports the associated operating gear at its top end and extends co-axially through the column, and a sleeve freely rotatable about and axially movable with the rod within the column. The sleeve has a plurality of exterior projecting elements juxtaposed to and engageable with a pair of internal, circumferential, upper and lower profiled surfaces on the column, the upper surface defining a set of downwardly directed alternatingly higher and lower stop faces, and the lower surface defining a set of upwardly directed camming faces, for the projecting elements. Shifting of an operating gear into or out of mesh with the main drive gear is effected by, in sequence, first pulling the rod downwardly to bring the projecting elements away from their stop faces and against the camming faces to rotate the sleeve one step, and then releasing the rod to permit the spring to bring the stepped elements against the next stop faces, thereby to change the vertical end position of the rod and its operating gear appropriately. This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.
REFERENCES:
patent: 2831362 (1958-04-01), Truesdell
patent: 3073180 (1963-01-01), Lohr
patent: 3364769 (1968-01-01), Etherton
patent: 3686974 (1972-08-01), Little
Holler Norbert P.
Staab Lawrence J.
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