초록 ▼

A selectively actuatable pressure relief valve (110) includes a housing (112) that defines an annular projection (118), an inlet port (120) in the lower surface (122), and a relief vent (124) in the sidewall. A first plunger (128) and a second plunger (138) are longitudinally disposed within the hou

A selectively actuatable pressure relief valve (110) includes a housing (112) that defines an annular projection (118), an inlet port (120) in the lower surface (122), and a relief vent (124) in the sidewall. A first plunger (128) and a second plunger (138) are longitudinally disposed within the housing and are actuatable between an open position and closed position. The valve is normally biased in the open position by a pair of springs (136 and 146). The valve may be actuated between the open and closed positions by a solenoid (148) or may be locked into the closed position by the manual override device (154). When the valve is in the closed position, the spring may be overcome by the fluid pressure exceeding a predetermined limit, thereby displacing the valve into the open position and providing high pressure relief.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] In an aircraft having a jet engine and a cowl for covering said jet engine, hinge means for swingably affixing said cowl to said engine for movement between a first closed position

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] In an aircraft having a jet engine and a cowl for covering said jet engine, hinge means for swingably affixing said cowl to said engine for movement between a first closed position and a second open position wherein said cowl is spaced from said engine to allow access thereto, hydraulic actuator means for moving said cowl between said open and closed position, including a hydraulic actuator, pump means for supplying pressurized hydraulic fluid, first conduit means for placing said pump means in fluid communication with said hydraulic actuator, a reservoir for holding hydraulic fluid, and a second conduit means coupled to said reservoir for returning hydraulic fluid thereto, the improvement comprising:a selectively actuatable pressure relief valve operatively coupled between said first conduit means and said second conduit means, said pressure relief valve being actuatable between(a) a first position wherein said first conduit means is placed in fluid communication with said second conduit means; and(b) a second position wherein fluid flow from said first conduit means to said second conduit means is blocked;means for biasing said pressure relief valve toward said first position; andactuating means for selectively moving said pressure relief valve from said first position to said second position.