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:
Mar. 23, 2021
Filed:
Apr. 11, 2018
Applicant:
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Inventors:
Zbigniew Jaskiewicz, Wroclaw, PL;
Lukasz Wiktorko, Wroclaw, PL;
Assignee:
HAMILTON SUNSTRAND CORPORATION, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/04 (2006.01); F15B 13/043 (2006.01); F16K 31/00 (2006.01); F16K 31/122 (2006.01); F16K 31/124 (2006.01);
U.S. Cl.
CPC ...
F15B 13/0402 (2013.01); F15B 13/043 (2013.01); F15B 13/0436 (2013.01); F15B 13/0438 (2013.01); F16K 31/004 (2013.01); F16K 31/007 (2013.01); F16K 31/124 (2013.01); F16K 31/1223 (2013.01); F16K 31/008 (2013.01); Y10T 137/86614 (2015.04);
Abstract
A servovalve includes: a fluid transfer valve assembly comprising a supply port and a control port; a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal; and a drive assembly configured to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The drive assembly comprises a piezoelectric actuator configured to vary the flow of fluid to respective ends of the valve spool in response to the control signal.