Afa Products, Inc.

Petrus Wilhelmus Hurkmans

Wilhelmus J Maas

The trigger sprayer comprises: a body having a cylinder therein; a liquid inlet to the cylinder; an outlet waterway in communication with the cylinder; a piston having an inner end and an outer end received in the cylinder; a fluid path including at least a part of the cylinder and the waterway and extending between the piston and an outlet orifice; a trigger coupled to the body and acting on the outer end of the piston; a precompression valve assembly in the fluid path between the piston and the outlet orifice which is operable to allow liquid in a first part of the fluid path to reach the outlet orifice only after a predetermined pressure is established in the cylinder and to stop liquid from reaching the outlet orifice when the pressure in the cylinder falls below the predetermined pressure and which includes a valve seat in the fluid path, a spring valve element and retaining structure for retaining the spring valve element against the valve seat; biasing structure for biasing the piston away from the precompression valve assembly; and, the piston having, at the inner end thereof, a protrusion which extends axially, outwardly from the inner end a sufficient distance to engage and deform slightly, at least upon the initial movements of the piston, the spring valve element upon squeezing the trigger to a fully squeezed in position.

Precompression valve for trigger sprayer

An apparatus for the simultaneous dispensing of two liquids from two separate liquid reservoirs at least two actuations are necessary in order for the venting of the interior and relieving of the back pressure in the liquid reservoirs. The first actuation is accomplished by rotating a valve having two mating valve members for opening and closing two sets of vertically extending passageways. The first set of passageways allows liquid to flow from the two liquid reservoirs to the intake stem of the spray pump dispenser. The second set of passageways connects both liquid reservoirs to a venting passageway. The second actuation is accomplished by pulling the trigger on the spray pump dispenser so the venting passageway is exposed to the ambient atmosphere. The venting passage reseals when the trigger returns to its rest position.

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Someren-Eind, Netherlands

Petrus Wilhelmus Hurkmans