Pre-compression valve systems for trigger sprayers

摘要

Pre-compression valve systems for trigger sprayers include one-piece valve systems having both check and pre-compression valves or multiple component valve systems. The pre-compression valve is positioned in a vertical cylinder, and may have a flat, concave, or convex surface.

主权项

1. A pre-compression valve system, comprising:
a unitary check valve and pre-compression valve, comprising a tubular body with an open lower end and a closed upper end; a post inserted inside the tubular body through the open lower end; wherein the check valve controls fluid flow into a pumping cylinder and the pre-compression valve is positioned in a vertical cylinder in communication with the pumping cylinder, the pre-compression valve opening only when a predetermined pressure exists within the pumping cylinder, the vertical cylinder having an axis extending from a view point beyond the pre-compression valve, past the pre-compression valve, and toward the check valve, and wherein the pre-compression valve has a convex sealing surface as viewed from the view point in the vertical cylinder.