Pneumatic cylinder with integral concentric hydraulic cylinder-t

Details Pneumatic cylinder with integral concentric hydraulic cylinder-t Pneumatic cylinder with integral concentric hydraulic cylinder-t

1989-01-17

1990-03-13

Garrett, Robert E.

Expansible chamber devices

With means to control flow of non-working arresting fluid...

Flow control means positioned between chambers having a...

92 10, 92 11, 92108, 92113, 188300, 188313, 267 6426, F15B 1522, F15B 1526

Patent

active

049074954

ABSTRACT:
A composite hydraulic cylinder apparatus which has a pneumatic cylinder mechanism, a braking oil hydraulic cylinder mechanism associated concentrically with the pneumatic cylinder mechanism, an oil passage for communicating between the front chamber and the rear chamber of the oil hydraulic cylinder mechanism, and a control valve provided in the oil passage for controlling the flow of the oil. Thus, the apparatus provides high positioning accuracy, a large holding force, economy and small size as a movable element control system, and can be applied as a buffer for the movable element.

REFERENCES:
patent: 3176801 (1965-04-01), Huff
patent: 3830139 (1974-08-01), Wachsman
patent: 3905425 (1975-09-01), Jackson
patent: 3929057 (1975-12-01), Kondo
patent: 4445671 (1984-05-01), Reuschenbach et al.
patent: 4526088 (1985-07-01), Reuschenbach
patent: 4528894 (1985-07-01), Crosby
patent: 4765225 (1988-08-01), Birchard

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