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:
Jul. 30, 1985
Filed:
Feb. 05, 1985
Applicant:
Inventor:
Michael E Barr, Dubuque, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762569 ; 13762548 ; 13762568 ;
Abstract
A spool valve having a pressure inlet port, a work port and a tank port. A spool valve is responsible for selectively communicating the pressure inlet port to the work port and the work port to the tank port. The work port is located between the pressure inlet port and the tank port. The spool contains a passageway which receives fluid from the pressure inlet port and directs the fluid between the work port and the tank port to provide a pressurized fluid seal between the work port and the tank port.
Barr, Michael. (1985). Control spool valve (U.S. Patent No. 4531546). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4531546
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile