Patent ID: 6126038
Filing Date: 2000-10-03
Classification: B05B

Abstract:
A manual spray pump assembly, comprising:a piston cylinder;a reciprocating piston;a valve member; anda compound spring, said compound spring having:a first compression region and a second compression region,said first region being coaxial with said second region, and having a first end and a second end, andsaid second region having a first end and a second end, said first region second end being fixed to said second region first end,said reciprocating piston being within said piston cylinder,said piston cylinder having an interior compression chamber and a valved outlet from said compression chamber,said valve member being positioned within said piston cylinder and having an outlet valve end, said valve member being in biased engagement with said compound spring second compression region second end and biased toward fluid tight engagement with said piston cylinder valved outlet,said compound spring first region first end being in biased engagement with said piston cylinder, and said compound spring first region, second end being in engagement with and movable with said reciprocating piston.