US4824337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly for an oscillating pump
Assignee: Gorman Rupp Co
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Filing: 1987-12-24
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Granted: 1989-04-25
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Expires: 2007-12-24
Abstract
Abstract A valve assembly (16) for an oscillating pump (10) of the type having a reciprocating armature (12) which carries an impeller (13) includes a rigid valve seat (17) carried by and movable with the impeller (13). The assembly (16) also includes an elastomeric valve (18) which is carried by the valve seat (17) within the impeller (13) and which divides the pump chamber therein into an inlet side (14) and outlet side (15). Reciprocation of the armature (12) first causes the valve (18) to engage the valve seat (17) to discharge fluid from the outlet side (15) of the pump chamber and then causes the valve (18) to disengage the valve seat (17) to permit fluid to pass from the inlet side (14) to the outlet side (15) of the pump chamber.
Inventors
- 👤 Darrell M. Lindner
- 👤 John R. Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:59
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/123
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A valve assembly for an oscillating pump of the type having a reciprocating armature carrying an impeller which defines a pump chamber for the passage of fluid, the assembly comprising a valve seat made of a rigid material and carried by the impeller for reciprocating therewith, and an elastomeric valve carried by said valve seat, said valve including a valve stem and a retaining barb at the end of said valve stem, said valve seat including a cylindrical portion engageable by said valve, and means extending across said cylindrical portion within the pump chamber to engage said valve stem, said retaining barb maintaining said means engaged with said valve stem, said valve being in the pump chamber and dividing the same into a pump inlet side and pump outlet side such that during reciprocation of the impeller said valve alternatingly discharges fluid from said pump outlet side by engagement with said valve seat and permits the passage of fluid from said pump inlet side to said pump outlet side by disengagement from said valve seat.
Claim 2
Dependent Claim
175 words
A valve assembly for an oscillating pump of the type having a reciprocating armature carrying an impeller which defines a pump chamber for the passage of fluid, the assembly comprising a valve seat made of a rigid material and carried by the impeller for reciprocating therewith, and an elastomeric valve carried by said valve seat, said valve including a valve stem and a retaining barb at the end of said valve stem, said valve seat including a cylindrical portion engageable by said valve, and means extending across said cylindrical portion within the pump chamber to engage said valve stem, said retaining barb maintaining said means engaged with said valve stem, said valve being in the pump chamber and dividing the same into a pump inlet side and pump outlet side such that during reciprocation of the impeller said valve alternatingly discharges fluid from said pump outlet side by engagement with said valve seat and permits the passage of fluid from said pump inlet side to said pump outlet side by disengagement from said valve seat.
Claim 3
Dependent Claim
28 words
A valve assembly according to claim 1 wherein the impeller is provided with an internal cylindrical recess to receive and engage said cylindrical portion of said valve seat.
Claim 4
Dependent Claim
17 words
A valve assembly according to claim 1 wherein said valve includes leaves engageable with said valve seat.
Claim 5
Dependent Claim
188 words
An oscillating pump comprising a housing, a metallic armature reciprocatable with respect to said housing, an impeller carried by said armature and defining a pump chamber for the passage of fluid, a rigid plastic valve seat carried by said impeller, and an elastomeric valve carried by said valve seat in said pump chamber and dividing said pump chamber into an inlet side and an outlet side, said valve including a valve stem and means to alternatingly engage and disengage said valve seat during reciprocation of said armature to respectively alternatingly discharge fluid from said outlet side of said pump chamber and permit the passage of fluid from said inlet side of said pump chamber to said outlet side of said pump chamber, said valve seat including a cylindrical portion carried by said impeller, said cylindrical portion being engaged by said means to alternatingly engage and disengage said valve seat, means extending across said cylindrical portion within said pump chamber to engage said valve stem, and means at the end of said valve stem to assure engagement of said means extending across said cylindrical portion with said valve stem.
Claim 6
Dependent Claim
188 words
An oscillating pump comprising a housing, a metallic armature reciprocatable with respect to said housing, an impeller carried by said armature and defining a pump chamber for the passage of fluid, a rigid plastic valve seat carried by said impeller, and an elastomeric valve carried by said valve seat in said pump chamber and dividing said pump chamber into an inlet side and an outlet side, said valve including a valve stem and means to alternatingly engage and disengage said valve seat during reciprocation of said armature to respectively alternatingly discharge fluid from said outlet side of said pump chamber and permit the passage of fluid from said inlet side of said pump chamber to said outlet side of said pump chamber, said valve seat including a cylindrical portion carried by said impeller, said cylindrical portion being engaged by said means to alternatingly engage and disengage said valve seat, means extending across said cylindrical portion within said pump chamber to engage said valve stem, and means at the end of said valve stem to assure engagement of said means extending across said cylindrical portion with said valve stem.
Claim 7
Dependent Claim
22 words
An oscillating pump according to claim 4 wherein said means to alternatingly engage and disengage said valve seat includes flexible valve leaves.
Claim 8
Dependent Claim
24 words
An oscillating pump according to claim 4 further comprising a recess in said impeller, said recess receiving said cylindrical portion of said valve seat.
References Cited (Backward Citations)
US2291603A
Cited
US2872871A
Cited
US3022796A
Cited
FR1202417A
Cited
US2954048A
Cited
US3354903A
Cited
US3312237A
Cited
US3250219A
Cited
US3479959A
Cited
US3849031A
Cited
US4375941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |