VALVES AND PUMPS USING SAID VALVES
Improved, rigid valves for pumps include outlet valve portions having a valve seal portion and one or more surfaces which create pockets between the outlet valve and an interior wall of a pump to collect and trap particulates in a formulation being pumped.
1 . A valve for a pump, comprising:
a valve stem;
an outlet valve at a first end of the valve stem, comprising:
a valve seal portion;
at least one surface extending from the valve seal portion towards the valve stem;
a valve disc at a second end of the valve stem.
2 . The valve of claim 1 , wherein the valve disc comprises a cup shape.
3 . The valve of claim 1 , wherein the valve disc comprises a conical shape.
4 . The valve of claim 1 , further comprising at least one rib running a portion of the length of the valve stem between the outlet valve and the valve disc.
5 . The valve of claim 1 , wherein the outlet valve further comprises at least one ridge about a portion of the at least one surface extending from the valve seal portion towards the valve stem.
6 . The valve of claim 1 , wherein the outlet valve further comprises at least one band about a portion of the at least one surface extending from the valve seal portion towards the valve stem.
7 . The valve of claim 1 , wherein the outlet valve further comprises at least one divot in the outlet valve.
8 . A pump, comprising:
a base;
a bellow seated in the base;
a cap securing the bellow in the base;
a valve in an interior portion of the base, the valve comprising:
an outlet valve comprising a valve seal portion seated against an interior wall of the base and at least one surface extending into an interior of the base;
a valve stem in communication with the at least one surface;
a pocket between the outlet valve and the interior wall of the base; and
a valve disc at an end opposite the outlet valve;
an attachment adapter seated against the valve disc and securing the valve in the base.
9 . The pump of claim 8 , wherein the pocket is between the valve seal portion seated against an interior wall of the base and the valve stem.
10 . The pump of claim 8 , wherein the outlet valve further comprises at least one ridge encircling a portion of the outlet valve.
11 . The pump of claim 8 , wherein the outlet valve further comprises at least one band encircling a portion of the outlet valve.
12 . The pump of claim 8 , wherein the outlet valve further comprises at least one divot in the outlet valve.
13 . The pump of claim 8 , wherein the valve disc comprises a cup shaped valve disc.
14 . The pump of claim 8 , wherein the valve disc comprises a conical shaped valve disc.
15 . The pump of claim 8 , further comprising a product in the pump, the product comprising particulates.