초록 ▼

A pump primer for a pump on a fire truck uses a high-speed compressed air in a venturi in a compressed air chamber to generate a vacuum in a vacuum chamber to prime a pump, with an integral valve which separates the pump from the priming ejectors (venturis), the valve being opened by the compressed

A pump primer for a pump on a fire truck uses a high-speed compressed air in a venturi in a compressed air chamber to generate a vacuum in a vacuum chamber to prime a pump, with an integral valve which separates the pump from the priming ejectors (venturis), the valve being opened by the compressed air when the primer is activated, the valve being closed by a spring return when the compressed air supply is removed, where water drawn in through the primer is freely drained by gravity to prevent freezing in cold weather.

대표청구항 ▼

A pump primer for a pump on a fire truck uses a high-speed compressed air in a venturi in a compressed air chamber to generate a vacuum in a vacuum chamber to prime a pump, with an integral valve which separates the pump from the priming ejectors (venturis), the valve being opened by the compressed

A pump primer for a pump on a fire truck uses a high-speed compressed air in a venturi in a compressed air chamber to generate a vacuum in a vacuum chamber to prime a pump, with an integral valve which separates the pump from the priming ejectors (venturis), the valve being opened by the compressed air when the primer is activated, the valve being closed by a spring return when the compressed air supply is removed, where water drawn in through the primer is freely drained by gravity to prevent freezing in cold weather. hread for engagement with a mating thread on an injector. 14. The cartridge/adaptor combination according to claim 10, wherein the cartridge is sealed with an imperforate, frangible seal. 15. The cartridge/adaptor combination according to claim 14, wherein the said frangible seal is capable of withstanding a pressure differential of up to 900 mbar. 16. The cartridge/adaptor combination according to claim 10, further including a sealing means for effecting a seal between the filling device outlet and the cartridge orifice. 17. A method of introducing fluid from an outlet of a filling device into a needless injector cartridge, comprising the steps of: (a) providing, in combination, a cartridge comprising a cartridge body having first and second ends, with a piston longitudinally slidable within the body, the cartridge body and piston being adapted to define together