Low power valve actuator

Details Low power valve actuator Low power valve actuator

1990-07-16

1992-02-04

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

25112912, 744248VA, 310 68B, 310 68C, F16K 3104, F16K 31528

Patent

active

050854011

ABSTRACT:
A low power valve actuator includes a small motor that rotates an Acme drive screw. The rotary motion of the drive screw is translated into linear motion of a drive nut-traveling block, which is guided along and held against rotation by a pair of spaced parallel guide rods. A cantilever pin carried on the traveling block engages in a groove extending longitudinally of, a Scotch yoke lever, which translates the linear motion back into rotary motion at a further mechanical advantage. The Scotch yoke lever is reinforced and strengthened by reason of the fact that the groove is not a through-slot, but extends only partially through the lever arm. The device is made more compact by reason of the fact that the groove in the Scotch yoke lever can actually extend over the top of the valve stem.

REFERENCES:
patent: 2793305 (1957-05-01), Gerentes
patent: 3640140 (1972-02-01), Gulick et al.
patent: 4460009 (1984-07-01), Nanci et al.
patent: 4763874 (1988-08-01), Ogawa
patent: 4775133 (1988-10-01), Ring et al.

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