초록 ▼

A pressure fueling adapter for aircraft has spring loaded primary and secondary nested poppets for controlling fluid flow therethrough, the primary poppet operable by engagement with the position lever of a fuel nozzle and the secondary poppet responsive to pressure differentials to allow inlet flui

A pressure fueling adapter for aircraft has spring loaded primary and secondary nested poppets for controlling fluid flow therethrough, the primary poppet operable by engagement with the position lever of a fuel nozzle and the secondary poppet responsive to pressure differentials to allow inlet fluid flow and check back flow. A cam interengagement mechanism may be manually actuated to connect the primary and secondary poppets for simultaneous movement by the position lever of the fuel nozzle to defeat the secondary poppet check, for defueling purposes.

대표청구항 ▼

An aircraft fueling adapter, comprising a housing having inlet and outlet ports, a valve seat in said housing between said inlet and outlet ports, said valve seat being annular and disposed closely adjacent said inlet port, primary and secondary poppets movable toward and away from said valve seat f

An aircraft fueling adapter, comprising a housing having inlet and outlet ports, a valve seat in said housing between said inlet and outlet ports, said valve seat being annular and disposed closely adjacent said inlet port, primary and secondary poppets movable toward and away from said valve seat for closing and opening the path for fluid flow between said inlet and outlet ports, said primary poppet being generally cylindrical and having a sealing portion cooperable with said valve seat, said primary poppet being slidable within said secondary poppet and being disposed near said inlet port and operable to an open position to apply fluid pressure from said inlet port to said secondary poppet, said secondary poppet being disposed between said primary poppet and said outlet port, and means biasing said poppets toward said valve seat to close the path for fluid flow, said secondary poppet being an annular check valve operable to open in response to fluid pressure at said inlet port, said secondary poppet having an inner periphery closely adjacent said primary poppet for guiding the latter toward and away from said valve seat.