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:
Apr. 18, 1989
Filed:
Aug. 13, 1987
Robert L Amberg, Seattle, WA (US);
Andrew M Valaas, Bellevue, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A system for controlling the torque developed by a fluid actuated brake as it slows an aircraft wheel. In one embodiment, the system includes a strain gauge (62) for sensing the load applied to a brake metering valve (16). In another embodiment, the pressure of the hydraulic fluid output from the brake metering valve is sensed by a pressure transducer (42). Depending upon the sensor used, the system is operative to control the pressure applied to a brake assembly (54) of an aircraft as a function of the mechanical load or pressure. The system includes a torque control (50,120) connected to control one or more valves (22, or 83 and 102), modulating the pressure of hydraulic fluid applied to the brake assembly; the valves may be part of an antiskid control system. A torque sensor (46) is disposed on a torque reaction arm (36) and produces a signal indicative of the torque developed by the brake assembly. The torque control reduces the pressure of the hydraulic fluid applied to the brake assembly if the torque produced by the brake exceeds a value determined as a function of the magnitude of the force applied to actuate the brake.