Precompression pump sprayer

Details Precompression pump sprayer Precompression pump sprayer

B - Operations, Transporting

05

B

B05B 11/00 (2006.01)

Patent

CA 2174186

A precompression pump sprayer comprises a hollow piston and a plunger rod having a discharge passage and a lower enlarged end forming a discharge valve seat, the rod extending through the piston for reciprocation between an inactive position and an end-of-stroke position, the piston engaging the valve seat in a discharge closed position, a primary spring biasing the plunger rod toward its inactive position, and a secondary spring biasing the piston into engagement with the discharge valve seat, the valve seat being of conical or curved shape, and the piston having a shoulder defining a discharge valve for solely contacting the valve seat along a thin circular line without sliding for quickly and cleanly valving the discharge passage open and closed during plunger actuation.

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