The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 1977
Filed:
Mar. 14, 1975
Slawomir Kowalski, Rockaway, NJ (US);
Marotta Scientific Controls, Inc., Boonton, NJ (US);
Abstract
The valve element of this invention is generally cylindrical and has poppet valves at both ends for contact with seats at opposite ends of a chamber in which the valve element moves. Cylindrical side walls at each end of the chamber prevent interflow between ports during movement of the valve element from one end of its stroke to the other. For sub-sea use on offshore drilling well heads, a spring that moves the valve element in one direction is in a chamber sealed from an adjacent chamber to which the ambient sea water has access. Apparatus for pilot operation of the valve element has spaced, aligned bearing guides for guiding the valve element on opposite sides of an intervening chamber that holds the sea water.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile