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:
Nov. 25, 2025
Filed:
Jan. 18, 2024
Pratt & Whitney Canada Corp., Longueuil, CA;
Hugues Pellerin, Montreal, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
An aircraft fluid control valve is provided that includes a sleeve, a cap, first and second pistons, and first and second springs. The sleeve includes first and second inner chambers. Fluid inlet and outlet ports are disposed in the first sleeve wall. A high pressure reference port is in fluid communication with the base end and a low pressure reference port is in communication adjacent the cap end. The first piston has a center post, a base flange, and a piston head. The piston head is attached to the center post. The second piston (SP) has a SP center flange and a SP side wall. The SP side wall extends axially between a base end and a cap end. The first spring is disposed between the SP center flange and the cap. The second spring is disposed between the PH base flange and the SP center flange.