Valve actuator

Expansible chamber devices – Relatively movable working members – First working member moves second coaxial working member...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

92 75, 92 86, 92110, 92134, F01B 702, F01B 3118

Patent

active

042167035

ABSTRACT:
A valve actuator includes a hydraulic cylinder with a pair of pistons separately, slidably mounted therein for movement between a first end and a second end of the cylinder. An actuator rod is joined to a first of the pistons to extend through an opening in the first end of the cylinder to terminate exterior thereto and be capable of being joined to a valve stem. A high pressure gas accumulator is mounted on the cylinder to locate the second end thereof within the accumulator. The second end of the cylinder has an end closure with access therethrough to allow communication between the interior of the accumulator and a first side of the second piston of the pair. Normally, hydraulic oil is supplied to the cylinder to act on the first piston thereby causing both pistons to move axially against the high pressure gas of the accumulator which, in turn, axially moves the pistons when the hydraulic fluid is discharged. A tubular housing extends from the end closure through the accumulator to be terminated outwardly thereof. A hollow tube extending from the second piston into the tubular housing makes sliding, sealed contact therewith to allow communication from the tubular housing to a space between the pistons. Providing hydraulic fluid to the tubular housing introduces such fluid to the space between the pistons allowing the first piston to be axially moved as the second piston remains against the end closure.

REFERENCES:
patent: 2479454 (1949-08-01), Annin
patent: 2937622 (1960-05-01), Brimhall
patent: 2943642 (1960-07-01), Westcott, Jr.
patent: 2961015 (1960-11-01), Randall
patent: 3168853 (1965-02-01), Prince
patent: 3509795 (1970-05-01), Woodword

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Valve actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve actuator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2178185

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.