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. 04, 2025
Filed:
May. 10, 2023
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Marcin Korczyński, Wrocław, PL;
Adam Mościcki, Stȩszów, PL;
HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US);
Abstract
A servo valve comprising: a fluid transfer valve assembly includes: a housing having channel therethrough fluidly connecting a supply port, a return port and a control port formed in the housing; a moveable valve spool located within the channel and arranged to regulate flow of fluid between the supply port, the return port and 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 valve spool comprises a first spool part and a second spool part and the drive assembly comprises a piezoelectric actuator positioned between the first and the second spool parts within the channel. Then when a control signal is applied to the piezoelectric actuator it causes extension or contraction of the first and second piezoelectric actuator elements.