초록

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.

대표청구항 ▼

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 cylin

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, andwherein the pre-compression valve has a convex sealing surface as viewed from the view point in the vertical cylinder. 2. A unitary pre-compression valve for a trigger sprayer, comprising: a check valve; anda pre-compression valve connected to the check 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 pre-compression valve is positioned in a vertical cylinder in communication with a 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,wherein the pre-compression valve has a sealing surface facing toward the view point in the vertical cylinder, andwherein the pre-compression valve opens only when a predetermined pressure exists within the pumping cylinder. 3. The unitary pre-compression valve of claim 2, wherein the unitary pre-compression valve is formed of a flexible plastic material. 4. The unitary pre-compression valve of claim 2, wherein the pre-compression valve has a flat surface as viewed from the view point in the vertical cylinder. 5. The unitary pre-compression valve of claim 2, wherein the pre-compression valve has a concave surface as viewed from the view point in the vertical cylinder. 6. The unitary pre-compression valve of claim 2, wherein the pre-compression valve has a convex surface as viewed from the view point in the vertical cylinder. 7. The unitary pre-compression valve of claim 6, further comprising a valve seat against which the pre-compression valve is seated. 8. The unitary pre-compression valve of claim 7, wherein the valve seat is provided by a valve seat component positioned in the vertical cylinder and above the pre-compression valve. 9. The unitary pre-compression valve of claim 7, wherein the valve seat is formed in the wall of the vertical cylinder. 10. The unitary pre-compression valve of claim 2, wherein the check valve is a frusto-conical shaped check valve. 11. 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 is positioned at the lower end and controls fluid flow into a pumping cylinder; andwherein the pre-compression valve is located at the upper end and is positioned in a vertical cylinder in communication with 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,wherein the pre-compression valve has a convex sealing surface facing toward the view point in the vertical cylinder,wherein the pre-compression valve opens only when a predetermined pressure exists in the pumping cylinder, andwherein the pre-compression valve has a convex surface as viewed from the view point in the vertical cylinder. 12. The pre-compression valve system of claim 11, wherein the unitary pre-compression valve is formed of a flexible plastic material. 13. The pre-compression valve system of claim 11, further comprising a channel inside the post. 14. The unitary pre-compression valve system of claim 11, further comprising a valve seat against which the pre-compression valve is seated. 15. The unitary pre-compression valve system of claim 14, wherein the valve seat is provided by a valve seat component positioned in the vertical cylinder and above the pre-compression valve. 16. The unitary pre-compression valve system of claim 14, wherein the valve seat is formed in the wall of the vertical cylinder. 17. The pre-compression valve system of claim 11, wherein the check valve is a frusto-conical shaped check valve. 18. 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;a channel inside the post, wherein the channel serves as a conduit to allow normal atmosphere outside air pressure to enter the tubular body;wherein the check valve is a frusto-conical shaped check valve positioned at the lower end and controls fluid flow into a pumping cylinder; andwherein the pre-compression valve is located at the upper end and is positioned in a vertical cylinder in communication with the pumping cylinder.