Expansible chamber devices – With inspection window in expansible chamber wall portion – With lock
Patent
1990-01-08
1991-02-26
Kwon, John T.
Expansible chamber devices
With inspection window in expansible chamber wall portion
With lock
92106, 91 1, 279 4, F01B 2526
Patent
active
049953036
ABSTRACT:
A power actuator has a hollow cylinder housing generally centered on an axis, a piston axially displaceable but non-rotatable in the housing and defining therein a pair of axially opposite pressurizable compartments, and a piston stem centered on the axis, fixed to the piston, extending axially from the piston, and formed with a pair of separate feed passages each having one end opening into a respective compartment and an opposite end opening axially on the stem. A distributor body rotatable about the axis on the stem at the opposite ends of the passages but axially nondisplaceable on the stem is provided with respective connections communicating with the opposite ends. Thus the compartments can be pressurized via the respective passages and connections for axial movement of the piston and stem in the housing. A pair of axially spaced guides are fixed on the distributor body and a bearing has a race axially rotatable on the housing about the axis but axially nondisplaceable on the housing. An axially extending rod axially displaceable in the guides on the distributor body has a front end that is connected to the race such that it can move limitedly radially relative thereto but not axially. An actuating element is coupled to the rod and a sensor is fixed on the distributor body and actuatable by the element of the rod.
REFERENCES:
patent: 3641875 (1972-02-01), Kodalle
patent: 4040338 (1977-08-01), Wilson et al.
patent: 4141263 (1979-02-01), Leutgas
patent: 4221160 (1980-09-01), Selden
patent: 4249451 (1981-02-01), LeMonl
patent: 4332186 (1982-06-01), Rohm
patent: 4493041 (1985-01-01), Antoni
patent: 4493242 (1985-01-01), Rohm
patent: 4762050 (1988-08-01), Marchand
Denion Thomas
Dubno Herbert
Kwon John T.
Wilford Andrew M.
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