US3877616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump with unitary valve member
Assignee: Precision Valve Corp
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Filing: 1974-05-28
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Granted: 1975-04-15
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Expires: 1994-05-28
Abstract
Abstract A pump for dispensing a product from a retail package is molded of plastic. The reciprocable member includes a piston having a flexible skirt. The inlet and outlet valves are resiliently deflectable margins on either end of a unitary valve member. The vent passage and the outlet passage are closed when the pump is at rest.
Inventors
- 👤 Silvester William Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:21
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1001; B05B11/1042; B05B11/1064; B05B11/1066; B05B11/1067; B05B11/1069; B05B11/1097
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
200 words
A dispensing pump construction for mounting on a container comprising: a housing having side and bottom walls defining a cylindrical interior chamber, and an inlet passage extending through the bottom wall of the housing, means to mount the pump in the mouth aperture of a container, a reciprocable member movable from a rest position through actuation and return strokes, said reciprocable member having a piston portion circumscribed by a resilient skirt for sliding sealed engagement with the cylindrical interior wall of the housing, a hollow stem portion coaxial with the piston portion, and an axial cylindrical outlet passage extending through the piston and stem portions, a unitary valve member having at its lower end an inlet valve and at its upper end an outlet valve, said inlet valve having a downwardly sloping resiliently deflectable margin biased toward sealing engagement with the interior surface of the bottom wall of the housing radially outwardly of said inlet passage, said outlet valve having an upwardly sloping resiliently deflectable margin biased toward sliding sealed engagement with the cylindrical wall of the outlet passage of the reciprocable member, and a return spring for biasing the reciprocable member upwardly toward the rest position of The pump.
Claim 2
Dependent Claim
200 words
A dispensing pump construction for mounting on a container comprising: a housing having side and bottom walls defining a cylindrical interior chamber, and an inlet passage extending through the bottom wall of the housing, means to mount the pump in the mouth aperture of a container, a reciprocable member movable from a rest position through actuation and return strokes, said reciprocable member having a piston portion circumscribed by a resilient skirt for sliding sealed engagement with the cylindrical interior wall of the housing, a hollow stem portion coaxial with the piston portion, and an axial cylindrical outlet passage extending through the piston and stem portions, a unitary valve member having at its lower end an inlet valve and at its upper end an outlet valve, said inlet valve having a downwardly sloping resiliently deflectable margin biased toward sealing engagement with the interior surface of the bottom wall of the housing radially outwardly of said inlet passage, said outlet valve having an upwardly sloping resiliently deflectable margin biased toward sliding sealed engagement with the cylindrical wall of the outlet passage of the reciprocable member, and a return spring for biasing the reciprocable member upwardly toward the rest position of The pump.
Claim 3
Dependent Claim
52 words
The dispensing pump of claim 1 wherein the hollow stem of the reciprocable member extends exteriorly of the container through an aperture with clearance, and the housing includes a vent port through the cylindrical wall to communicate the interior of the container with the atmosphere through said vent port and said clearance.
Claim 4
Dependent Claim
21 words
The dispensing pump of claim 2 wherein said piston portion blocks said clearance when the pump is in the rest position.
Claim 5
Dependent Claim
23 words
The dispensing pump of claim 1 wherein the means to mount the pump on the container is a collar integral with the housing.
Claim 6
Dependent Claim
30 words
The dispensing pump of claim 2 wherein the means to mount the pump on the container is a cap having an aperture through which the hollow stem extends with clearance.
Claim 7
Dependent Claim
12 words
The dispensing pump of claim 4 wherein the collar is internally threaded.
Claim 8
Dependent Claim
12 words
The dispensing pump of claim 5 wherein the cap is internally threaded.
Claim 9
Dependent Claim
14 words
The dispensing pump of claim 1 wherein the valve member is an integral piece.
Claim 10
Dependent Claim
20 words
The pump of claim 8 wherein the outlet valve is in the form of an inverted cone having deflectable walls.
Claim 11
Dependent Claim
25 words
The pump of claim 8 wherein the inlet valve is in the form of a disc surrounded by a downwardly sloping resiliently deflectable annular margin.
Claim 12
Dependent Claim
26 words
The pump of claim 10 wherein the bottom wall of the housing includes circumferentially spaced projections upon which the disc portion of the inlet valve sits.
Claim 13
Dependent Claim
34 words
The pump of claim 11 wherein the return spring is a compression spring interposed between the lower surface of said piston portion and the upper surface of said disc portion of the inlet valve.
References Cited (Backward Citations)
US3282472A
Cited
US3527551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |