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:
Feb. 17, 1987
Filed:
Mar. 02, 1984
Larry K Spencer, Carrollton, TX (US);
Sigma Enterprises, Inc., Dallas, TX (US);
Abstract
A convertible high or low pressure pilot valve adapted to selectively control fluid flow between a common port and a supply port or exhaust port by moving a band of orifices in a plunger that is slidably disposed within the valve past an O-ring seal disposed between the supply port and the exhaust port so as to establish fluid communication between the common port and the supply port whenever the band is aligned with the supply port through a unitary axial bore in the plunger that maintains fluid communication with the common port or between the common port and the exhaust port through the same axial bore, whenever the band is aligned with the exhaust port or to block fluid communication between the common port, the supply port, and the exhaust port whenever the band is disposed between the supply port and the exhaust port in such manner that the O-ring bridges the orifices in such band.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile