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:
Aug. 19, 2025
Filed:
Apr. 29, 2024
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Sachin Ramprashad, West Hartford, CT (US);
Ryan Prescott Susca, Windsor, CT (US);
Hamilton Sunstrand Corporation, Charlotte, NC (US);
Abstract
Apparatus and associated methods relate to passively limiting a load of a stalled linear hydraulic actuator that actuates a kinematic device. Damage to a stalled linear hydraulic actuator, associated mounting structure(s), any associated linking mechanism(s), and/or a kinematic device controlled thereby can be prevented quickly and without necessarily forfeiting control of the kinematic device. Such damage prevention can be performed using a cross-bleed safety mechanism connected in parallel with the linear hydraulic actuator. The cross-bleed safety mechanism includes a bilaterally moveable spool within a hydraulic cylinder. The bilaterally moveable spool is located between hydraulic chambers that are in fluid communication with corresponding chambers of the linear hydraulic actuator. In response to being sufficiently displaced from an equilibrium position in each direction of movement by a pressure difference thereacross, the bilaterally moveable spool unblocks bypass channels thereby limiting the stalled linear actuator.