Piston with extended axial travel

Details Piston with extended axial travel Piston with extended axial travel

1978-05-22

1980-06-24

Hershkovitz, Abraham

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Having motor-operated adjustment

92 131, 92 136, 92 51, 92117A, 92165PR, 188 718, 188196A, F01B 902

Patent

active

042089522

ABSTRACT:
A fluid pressure actuated piston is slidably carried in a fluid pressure actuated cylinder which, in turn, is slidably carried in a fixed carrier. Forward axial movement of the cylinder is restricted by a hydraulic pressure balance condition which is created by reducing the rearward surface area of the cylinder. The cylinder is maintained in a pressure balanced condition during the entire operation of the piston assembly. After the piston moves axially forward a predetermined distance, it engages the cylinder and urges the cyliner axially forward the same distance traveled by the piston. The piston's maximum axial movement is thereby extended by the distance the cylinder travels. The output force of the piston is substantially unaffected by the force imposed on the cylinder. Also, the cylinder does not provide any work force area.

REFERENCES:
patent: 3335642 (1967-08-01), Rosaen
patent: 3729072 (1973-04-01), Borkowski
patent: 3995721 (1976-12-01), Chambers
patent: 4006669 (1977-02-01), Price
patent: 4068746 (1978-01-01), Munechika

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