Precompression system for a liquid dispensing device and method of assembling such precompressed system
DCFirst Claim
1. A precompression system for a liquid dispensing device having an inlet and an outlet, comprising:
- a pump chamber including a piston movable in the pump chamber for drawing liquid through the inlet and discharging the liquid through the outlet; and
a valve chamber including a valve member disposed between the pump chamber and the outlet and being operable to allow liquid in the pump chamber to reach the outlet only after a predetermined pressure is established in said pump chamber and to stop liquid from reaching the outlet when the pressure in the pump chamber falls below said predetermined pressure,wherein the valve chamber has an inlet end in fluid communication with said pump chamber, an outlet end in fluid communication with the outlet and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough,wherein the valve member comprises an elastic diaphragm normally closing the valve seat opening and including a concave surface facing the valve seat opening and in fluid communication with the pump chamber and a convex surface in fluid communication with atmospheric pressure, andwherein the valve member includes a sleeve surrounding and holding the outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner.
8 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A pre-compression system for liquid dispensing devices, such as sprayers, is presented. The pre-compression system includes a pump chamber and a valve chamber including a pre-compression valve member. The valve member is operable to allow liquid in the pump chamber to exit via an outlet only after a predetermined pressure is reached in the pump chamber, and to stop liquid from exiting when the pressure in the pump chamber falls below the predetermined pressure. The valve member includes an elastic diaphragm and a valve seat. The valve member has a concave surface facing a valve seat opening and a convex surface in communication with atmospheric pressure.
13 Citations
31 Claims
-
1. A precompression system for a liquid dispensing device having an inlet and an outlet, comprising:
-
a pump chamber including a piston movable in the pump chamber for drawing liquid through the inlet and discharging the liquid through the outlet; and a valve chamber including a valve member disposed between the pump chamber and the outlet and being operable to allow liquid in the pump chamber to reach the outlet only after a predetermined pressure is established in said pump chamber and to stop liquid from reaching the outlet when the pressure in the pump chamber falls below said predetermined pressure, wherein the valve chamber has an inlet end in fluid communication with said pump chamber, an outlet end in fluid communication with the outlet and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough, wherein the valve member comprises an elastic diaphragm normally closing the valve seat opening and including a concave surface facing the valve seat opening and in fluid communication with the pump chamber and a convex surface in fluid communication with atmospheric pressure, and wherein the valve member includes a sleeve surrounding and holding the outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A liquid dispensing device having an inlet and an outlet and a precompression system arranged therebetween, the precompression system comprising:
-
a pump chamber including a movable piston, and a valve chamber including a valve member disposed between the pump chamber and the outlet, wherein the valve chamber has an inlet end, an outlet end and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough, wherein the valve member comprises an elastic diaphragm normally closing the valve seat opening and including a concave and a convex surface, and wherein said concave surface faces the valve seat opening and is in fluid communication with the pump chamber and said convex surface is in fluid communication with atmospheric pressure, and wherein the valve member includes a sleeve surrounding and holding the outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. A method of assembling a precompression system for a liquid dispensing device having an inlet and an outlet, comprising:
-
providing a pump chamber including a piston movable therein; providing a valve chamber disposed between the pump chamber and the outlet, said valve chamber having an inlet end in fluid communication with said pump chamber, an outlet end in fluid communication with the outlet and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough, and arranging a valve member in the valve chamber such that it normally closes the valve seat opening; wherein the valve member comprises an elastic diaphragm including a concave surface facing the valve seat opening and in fluid communication with the pump chamber and a convex surface in fluid communication with atmospheric pressure, and wherein the valve member includes a sleeve surrounding and holding the outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A precompression system for a liquid dispensing device having an inlet and an outlet, the precompression system comprising:
-
a pump chamber including a piston movable in the pump chamber for drawing liquid through the inlet and discharging the liquid through the outlet; and a valve chamber including a valve member disposed between the pump chamber and the outlet and being operable to allow liquid in the pump chamber to reach the outlet only after a predetermined pressure is established in said pump chamber and to stop liquid from reaching the outlet when the pressure in the pump chamber falls below said predetermined pressure, wherein the valve chamber has an inlet end in fluid communication with said pump chamber, an outlet end in fluid communication with the outlet and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough, and wherein the valve member comprises an elastic diaphragm stretched around the valve seat and normally closing the valve seat opening, and wherein the valve member includes a sleeve surrounding and holding the outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner. - View Dependent Claims (26, 27, 28, 29)
-
-
30. A method of assembling a precompression system for a liquid dispensing device having an inlet and an outlet, comprising:
-
providing a pump chamber including a movable piston; providing a valve chamber disposed between the pump chamber and the outlet, said valve chamber having an inlet end in fluid communication with said pump chamber, an outlet end in fluid communication with the outlet and a valve seat arranged between the inlet end and the outlet end and having an opening extending therethrough, and arranging a valve member comprising an elastic diaphragm in the valve chamber such that the elastic diaphragm is stretched around the valve seat and normally closes the valve seat opening, wherein the valve member is provided with a sleeve, the sleeve surrounding and holding an outer periphery of the diaphragm, said sleeve being provided within said valve chamber, said sleeve having a lengthwise dimension that is substantially perpendicular to the diaphragm, and greater than a corresponding depth of the valve chamber, such that the valve member and sleeve fit into the valve chamber in a compressed manner.
-
-
31. The method of 30, wherein the valve member includes a sleeve surrounding and holding the outer periphery of the elastic diaphragm and extending substantially perpendicular to the plane of the diaphragm, wherein the diaphragm is stretched around the valve seat when the sleeve is sealingly arranged in the valve chamber.
Specification