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An improved high pressure impulse valve includes a pilot section, an intermediate section, and an output section which are pressurized to approximately equilibrium with the inlet pressure during a load portion of the operating cycle and which cooperate to provide extremely rapid full opening of the

An improved high pressure impulse valve includes a pilot section, an intermediate section, and an output section which are pressurized to approximately equilibrium with the inlet pressure during a load portion of the operating cycle and which cooperate to provide extremely rapid full opening of the output section to release fluid under pressure from an accumulator through an output section piston seat. The valve is particularly suitable for use in combination with pneumatic impulse separation systems such as those employed for deicing aircraft surfaces.

대표청구항 ▼

A valve comprising pilot, intermediate and output sections, the pilot section including a pilot housing containing a pilot cavity, inlet conduit means extending from the exterior of the pilot housing to the pilot cavity, exhaust conduit means extending from the pilot cavity to the exterior of the pi

A valve comprising pilot, intermediate and output sections, the pilot section including a pilot housing containing a pilot cavity, inlet conduit means extending from the exterior of the pilot housing to the pilot cavity, exhaust conduit means extending from the pilot cavity to the exterior of the pilot housing, and intermediate conduit means extending from the pilot cavity to said intermediate section, gate means configured for movement from a load position during which the inlet conduit means is in fluid communication with said intermediate conduit means and a discharge position during which the exhaust conduit means is in fluid communication with said intermediate conduit means while said inlet conduit means is disconnected from said intermediate conduit means; the intermediate section including an intermediate housing containing an intermediate cavity having an inlet port in fluid communication with said intermediate conduit means, an exhaust vent, and an outlet port in fluid communication with output conduit means, the outlet port being proximate to the exhaust vent, and a poppet contained within said intermediate cavity configured for movement from a load position during which fluid under pressure may enter the intermediate cavity and force the poppet to seal off movement of fluid into the exhaust vent while permitting flow of fluid to the outlet port and a discharge position during which fluid under pressure may flow from said output conduit means to said vent; the output section including an output housing containing an output cavity having an inlet orifice in fluid communication with said output conduit means, an outlet and accumulation means having an opening to said output cavity proximate to said outlet, and a piston contained within said output cavity and accumulation means configured for movement from a load position during which fluid under pressure may enter the output cavity through said inlet orifice and force the piston to seal off movement of fluid into the outlet while permitting flow of fluid into the accumulation means, and a discharge position during which fluid under pressure may flow from said accumulation means to said outlet, characterized by: said poppet having: a) a poppet bleed duct extending through said poppet for providing restricted communication of fluid between said intermediate cavity and said output cavity; b) poppet sealing means for preventing leakage of fluid from said intermediate cavity and said output port from any way other than said bleed duct; said piston having: a) a cylindrical head for being reciprocally received within said output cavity; b) a neck having at least three legs with each leg having a tip surface extending radially outward from said neck, said neck being reciprocally received within said accumulation means by means of contact between said tips with said accumulation means; c) a sealing face for sealing off movement of fluid into said outlet while said piston is in the load position; d) a piston bleed duct extending through said head for providing restricted communication of fluid between said output cavity and said accumulation means; and, piston sealing means for preventing leakage of fluid from said accumulation means to said output cavity, wherein said accumulation means is a chamber within the output housing defined substantially by the difference between the diameter of said neck and the inside diameter of the output housing.