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:
Dec. 02, 1986
Filed:
Apr. 23, 1985
Joseph L Johnson, Houston, TX (US);
Priess-Johnson Oil Tools International, Inc., Houston, TX (US);
Abstract
A pressure-operated valve is disclosed including a choke positioned between one or more inlet ports to the valve and a flow port within the valve defined by a seat to which a valve element may be sealed to close the valve. The choke includes one or more orifices to provide a constricted flow path such that control fluid, entering the inlet port, experiences a pressure drop before reaching the flow port, whereby fluid pressure downstream of the flow port may effectively control the configuration of the seat-and-valve element combination. The choke, which is sealed within the valve to prevent fluid flow around the choke, may be positioned at the inlet port to receive fluid flow into the valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile