Power plants – Pressure fluid source and motor – Pulsator
Patent
1975-12-24
1978-03-14
Schwadron, Martin P.
Power plants
Pressure fluid source and motor
Pulsator
60545, 60561, 60562, 60582, 60591, F15B 700
Patent
active
040783847
ABSTRACT:
A fluid motor having a housing with a stepped bore for retaining a first piston and a second piston. A sleeve is located in the stepped bore to permit the first piston and the second piston to be of substantially the same diameter. A plug attached to the housing holds the sleeve in the stepped bore. A spring attached to the sleeve holds the first piston against a stop. The spring acts on the sleeve to create a gap with a shoulder in the stepped bore. The second piston which is connected to the first piston through a linkage mechanism carries a concentric shuttle piston. The shuttle piston is subjected to a first hydraulic pressure created by the first piston and to a second hydraulic pressure created by the second piston. An indicator is connected to the shuttle piston and remains inactive when the first and second hydraulic pressures are substantially equal. However, whenever the second hydraulic pressure moves the second piston against the sleeve sufficiently to close the gap, the shuttle piston moves to generate a signal which actuates the indicator to inform the operator of such a condition.
REFERENCES:
patent: 3415060 (1968-12-01), Belart
patent: 3416315 (1968-12-01), Wortz
patent: 3677606 (1972-07-01), Shutt
patent: 3686864 (1972-08-01), Shutt
Antonis William N.
Hershkovitz Abraham
McCormick Jr. Leo H.
Schwadron Martin P.
The Bendix Corporation
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