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:
May. 14, 1991
Filed:
Jun. 14, 1990
Earl L Wilson, Springfield, OR (US);
Other;
Abstract
A valve including spools each responsive to fluid pressure and each spring biased to an open position. Multiple sources of pressure, such as tanks, serve the valve. Tank pressure is directed in sequence through a spool in the open position to an end chamber of the remaining spool to shift the latter spool for uninterrupted passage of fluid pressure into an outlet of the end chamber and past a flow separator spool to a pressure regulator. Switching to a second tank occurs automatically upon a drop in end chamber pressure permitting shifting of a spool to an open position to direct fluid pressure to the end chamber of the remaining spool.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile