Patent US3756741A successfully refreshed from Google Patents.
US3756741A
Expired / Lapsed
US
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Jet propulsion pump assembly
Assignee: Jacuzzi Brothers Inc
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Filing: 1971-12-17
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Granted: 1973-09-04
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Expires: 1991-12-17
Abstract
Abstract A jet propulsion pump assembly is provided with wear-ring of non-metallic material such as plastic, the wear-ring being installed so as to be worn in by rotation of the impeller when under load. Provision is made for reducing thrust on the impeller.
Inventors
- 👤 F Woell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:05
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/086; F04D29/04; F04D29/041; F04D29/0416; F04D3/00; F04D3/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
In a jet propulsion pump assembly having a suction piece and a bowl terminating in a nozzle, a conical shaped hub support for an impeller assembly disposed axially of said bowl and connected to said bowl by a plurality of vanes to determine passages to said nozzle, a thrust bearing supported within said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing, said impeller assembly including an impeller having blades with their remote edges such as to generate a substantially conical surface at an angle to the axis of said impeller, a wear-ring installed between said suction piece and bowl in line with said blade edges, said wear-ring having an interior surface contoured to the surface generated by the remote edges of said impeller blades, and means for clamping said wear-ring between said suction piece and said bowl with said interior surface in proximity to said blade edges, said clamping means being independent of said wear-ring.
Claim 2
Dependent Claim
166 words
In a jet propulsion pump assembly having a suction piece and a bowl terminating in a nozzle, a conical shaped hub support for an impeller assembly disposed axially of said bowl and connected to said bowl by a plurality of vanes to determine passages to said nozzle, a thrust bearing supported within said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing, said impeller assembly including an impeller having blades with their remote edges such as to generate a substantially conical surface at an angle to the axis of said impeller, a wear-ring installed between said suction piece and bowl in line with said blade edges, said wear-ring having an interior surface contoured to the surface generated by the remote edges of said impeller blades, and means for clamping said wear-ring between said suction piece and said bowl with said interior surface in proximity to said blade edges, said clamping means being independent of said wear-ring.
Claim 3
Dependent Claim
20 words
In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring being of a non-metallic material.
Claim 4
Dependent Claim
58 words
In a jet propulsion pump assembly in accordance with claim 1, characterized by said wear-ring having a plurality of dowels extending therefrom in matching relationship to a plurality of holes in an adjacent component of said pump assembly, whereby said wear-ring may readily be assembled thereto, and removed therefrom for replacement upon unclamping of said independent clamping means.
Claim 5
Dependent Claim
17 words
In a jet propulsion pump in accordance with claim 1, characterized by said wear-ring being of plastic.
References Cited (Backward Citations)
US3227418A
Cited
US3250069A
Cited
US3249083A
Cited
US3405526A
Cited
US3603599A
Cited
US3656862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |