Pressure releasing device for spray pump

Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type

Reexamination Certificate

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Details

C137S102000

Reexamination Certificate

active

07431042

ABSTRACT:
A pressure releasing device contains a tubular body member with a slidable slider member inside. The pressure releasing device is connected to the output of the high-pressure pump and high-pressure water will flows through the pressure releasing device when the pump is turned on and, when the pump is turned off, the high-pressure backflow will force the slider member to quickly block the inlet of the pressure releasing device. A pressure releasing opening controlled by a low-pressure valve is provided along the tubular body member. When the pump is turned off, the high-pressure backflow will be quickly released through the pressure releasing opening and the low-pressure valve helps to keep the water pressure inside the hose below a low pressure level to prevent dripping.

REFERENCES:
patent: 2367682 (1945-01-01), Kehle
patent: 3007492 (1961-11-01), Grimmer
patent: 3967635 (1976-07-01), Sealfon et al.
patent: 4058349 (1977-11-01), Ury
patent: 6769450 (2004-08-01), Fretwell

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