Fluid power actuator

Details Fluid power actuator Fluid power actuator

1986-02-21

1987-10-13

Hershkovitz, Abraham

Motors: expansible chamber type

With correlated control of motive fluid and locking means

Sequential operation of locking means and motive fluid control

92 19, 92 23, 92 27, 74527, 188 67, F15B 1526

Patent

active

046990429

ABSTRACT:
The invention relates to a fluid power actuator with a cylinder, a piston and a piston rod whose motion is controlled by a positioning device which halts it in selected settings. The positioning device has a row of depressions, for example gaps between the teeth of a rack, running parallel to the piston rod. A positioning plunger moves into a selected depression to lock the rod. A shutter with at least one opening therein covers the row of depressions and is adjustably affixed thereto so as to allow adjustment of the position at which the control plunger aligns with the shutter opening and slips into the selected uncovered depression to stop and lock the piston and rod.

REFERENCES:
patent: 1085964 (1914-02-01), Briggs
patent: 1302738 (1919-05-01), Wallman
patent: 2130618 (1938-09-01), Gnavi
patent: 2342812 (1944-02-01), Martinson
patent: 2846896 (1958-08-01), Allen
patent: 3000231 (1961-09-01), Cochran
patent: 3000359 (1961-09-01), May
patent: 3096554 (1963-07-01), Johnson
patent: 3958813 (1976-05-01), Carey
patent: 4519329 (1985-05-01), Vacher
"Lanced Metal Eliminates Separate Fasteners," in Product Engineering, 31, No. 36, 9-5-60, pp. 63 and 65.

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