Precompression pump sprayer
AssigneeCalmar Inc.
InventorsRobert L. Florez, Adonis Spathias
Life of this patent
Estimating the term…
Abstract
A precompression pump sprayer is primed by the provision of a priming ramp for deflecting the lower end of a poppet valve member at the end of the plunger downstroke for cocking the valve member so as to disrupt its sealing action with the discharge valve seat to thereby permit air to be released from the pump chamber through the discharge orifice and to the atmosphere.
Claims7
A precompression pump sprayer, comprising a pump housing having a pump cylinder, a pump piston mounted for reciprocation within said cylinder to therewith define a variable volume pump chamber, said piston having a hollow stem defining a discharge passage, a discharge valve seat in said passage confronting said chamber, a discharge valve member mounted for reciprocation within said housing, said valve member comprising a poppet valve in sealing engagement with said valve seat in a discharge closed position, means for reciprocating said piston and said valve member substantially in unison against the bias of a return spring, deflecting means within said housing located out of alignment with a central longitudinal axis of said housing, said deflecting means extending toward said valve member in the path of reciprocation of a lower end of said valve member, said lower end impacting against said deflecting means during the downstroke movement of said piston for deflecting said lower end away from said axis for cocking said popper valve to disrupt the sealing engagement of said poppet valve with said valve seat for expelling entrapped air from said pump chamber through said discharge passage.
Dependencies are inferred from the claim text.