Compact high torque rotary valve operator for simultaneous actua

Details Compact high torque rotary valve operator for simultaneous actua Compact high torque rotary valve operator for simultaneous actua

1984-04-24

1985-08-06

Jones, Larry

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251248, 251279, 251 62, 137595, 92140, 92136, 74105, F16K 31163

Patent

active

045331138

ABSTRACT:
A pair of spaced rotatable shafts are mounted within a housing. A linear motor mounted to the housing has a reciprocating piston within a double action piston chamber whose piston rod projects from the piston. Both shafts are fixed directly to axially aligned rotary valve stems, to opposite sides of the reciprocating piston rod. A pin coupled to the end of the piston rod projects through longitudinal slots within radial arms fixed to respective shafts at different levels and rotating with the shafts. Equal sized gears mounted to the shafts are in peripheral mesh such that the shafts rotate in unison. The mechanism eliminates side thrust on the piston and piston rod, doubles the valve breakout forces applied to the rotary valve member and eliminates the need for an outboard bushing for a piston rod extension beyond its connection to the paired shafts.

REFERENCES:
patent: 979532 (1910-12-01), Merrill et al.
patent: 1231305 (1917-02-01), Shepherd
patent: 1661691 (1926-05-01), Eason
patent: 2073891 (1937-03-01), Vogler
patent: 2467065 (1949-04-01), White
patent: 2646074 (1953-07-01), Hopkins
patent: 3218023 (1965-11-01), Kirkup
patent: 3409048 (1968-11-01), Brown
patent: 3444784 (1969-05-01), Wengerd
patent: 3646832 (1972-03-01), Hinofuji
patent: 3650506 (1972-03-01), Bruton
patent: 4191214 (1980-03-01), Holley et al.

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