Piston drive

Details Piston drive Piston drive

1989-08-18

1991-06-18

Kwon, John T.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Axial adjustment of spaced, rigidly interconnected working...

92 13, 92 136, 92128, F01B 3114

Patent

active

050241443

ABSTRACT:
A piston drive e.g. for actuating a valve includes a piston which reciprocates in axial direction within a housing between two end positions, with one end position being defined by a worm drive including a manually actuated worm which actuates a worm wheel movable in axial direction and defining a stop for the piston. The other end position is defined by a gear which is arranged in the path of movement of the piston and is provided with an internal gear meshing with the external thread of a stationary connecting piece of the housing. The gear is turned relative to the connecting piece and thus moved in axial direction by a tool which is insertable through a bore in the housing from the outside.

REFERENCES:
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patent: 2976844 (1961-03-01), Goldring
patent: 3094254 (1963-06-01), Cullen et al.
patent: 3160077 (1964-12-01), Ribeiro et al.
patent: 3162098 (1964-12-01), Lindberg
patent: 3175473 (1965-03-01), Boteler et al.
patent: 3371553 (1968-03-01), Miner
patent: 3410518 (1968-11-01), Carsten
patent: 3830139 (1974-08-01), Wachsman et al.
patent: 3978884 (1976-09-01), Sundstrom
patent: 4671485 (1987-06-01), Saarem
patent: 4883412 (1989-11-01), Malizard et al.

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