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US 4,491,060 AGranted
Cylinder connection
AssigneeOtis Engineering Corporation
InventorIsrael Boski
Life of this patent
Estimating the term…
Abstract
A cylinder for a valve actuator wherein the cylinder body has lugs connectable to and disconnectable from like cylinder head lugs by less than one turn rotation. Resilient seals seal the head to the body when connected, and the connection is releasably lockable.
Claims5
An actuator for operating a valve comprising:
- a. a cylinder, having a head with an opening in its upper end and inlet therethrough, and a body, said cylinder head and body being connected together by lugged means, means sealing said head to said body and means releasably locking said head and body connected, said means releasably locking the cylinder head and body including at least one frangible pin, installed in a hole through one of the head and body, protruding into a hole in one of a head lug and body lug of the lugged means;
- b. a bonnet flange connected to the lower end of said cylinder body;
- c. a bonnet, connected to said bonnet flange, the lower end thereof connectable to a valve body;
- d. a piston sealably and slidably mounted in said cylinder;
- e. a spring in said cylinder below said piston, upwardly biasing said piston;
- f. a stem, connected through said piston and extending through said cylinder head opening, the lower end thereof connectable to a valve;
- g. resilient seals slidably sealing said stem through said head;
- and
- h. resilient seals slidably sealing said stem through said bonnet.
6 more elements
Dependencies are inferred from the claim text.