Pneumatic actuators

Details Pneumatic actuators Pneumatic actuators

1974-09-18

1976-07-27

Maslousky, Paul E.

Motors: expansible chamber type

Working member position responsive motive fluid control

91186, 91420, 91438, 92 69R, 92130R, F01B 706, F15B 13042

Patent

active

039712966

ABSTRACT:
A pneumatic actuator having a double-acting piston separating two pressure chambers, spring means to urge the piston in one direction; and valve means adapted to admit compressed air to one of the chambers and thus to load the spring means, then to transfer some of said air into the other of the chambers at a selected phase-position of said piston, and then to open the one chamber to atmosphere so that the combined forces of the spring means and of the compressed air acting on the piston in said other chamber complete the power stroke of the actuator.

REFERENCES:
patent: 666565 (1901-01-01), Show
patent: 1532029 (1925-03-01), Bobbitt
patent: 1667559 (1928-04-01), McCaleb
patent: 3476019 (1969-11-01), Berg et al.
patent: 3693501 (1972-09-01), Ward
patent: 3757646 (1973-09-01), Rohner

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