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:
Jun. 22, 1993
Filed:
Jan. 14, 1992
Applicant:
Inventors:
Frederick L Erickson, Fort Wayne, IN (US);
William E Richeson, Fort Wayne, IN (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F01L / ;
U.S. Cl.
CPC ...
251 3005 ; 251 47 ; 2511291 ; 123 9012 ;
Abstract
A highly efficient all hydraulic poppet valve actuator utilizes fluid spring chambers at each end of travel to store energy. Fluid in a first spring chamber is compressed and the chamber cocked by supplemental hydraulic pressure which also seats a poppet valve. A first activation device cancels this pressure to allow transit of the poppet valve and re-cocking of the second spring chamber. Return activation is caused by cancelling a fluid latch to allow transit back to an initial position which recloses the poppet valve.