Patent US3312385A successfully refreshed from Google Patents.
Patent US3839859A successfully refreshed from Google Patents.
US3839859A
Expired / Lapsed
US
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Jet propulsion pump assembly
Assignee: Jacuzzi Brothers Inc
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Filing: 1973-03-23
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Granted: 1974-10-08
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Expires: 1993-03-23
Abstract
Abstract A jet propulsion pump assembly is provided with a 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
2026-11-06 15:53
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/086; B; B63; B63H; B63H11/00; B63H11/02; B63H11/04; B63H11/08; F04D29/04; F04D29/041; F04D29/0416; F04D3/00; F04D3/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
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 therewith by a plurality of vanes to determine passages to said nozzle, said hub support having a recess at an end thereof and flow passageway means flow connecting said recess with said nozzle, a thrust bearing supported by said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing and including an impeller having a hub, said hub at its thrust end extending into said hub support recess and means providing a rotational fit between said hub support and hub whereby to cause a pressure drop along said thrust end to reduce thrust pressure against said hub.
Claim 2
Dependent Claim
138 words
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 therewith by a plurality of vanes to determine passages to said nozzle, said hub support having a recess at an end thereof and flow passageway means flow connecting said recess with said nozzle, a thrust bearing supported by said suction piece, an impeller assembly in said bowl supported by and between said hub support and said thrust bearing and including an impeller having a hub, said hub at its thrust end extending into said hub support recess and means providing a rotational fit between said hub support and hub whereby to cause a pressure drop along said thrust end to reduce thrust pressure against said hub.
Claim 3
Dependent Claim
43 words
A jet propulsion pump assembly in accordance with claim 1, characterized by said flow connecting means including said conical shaped hub support having a plurality of longitudinal passages therethrough and symmetrically disposed with respect to the axis of said conical shaped hub support.
Claim 4
Dependent Claim
41 words
A jet propulsion pump assembly in accordance with claim 1, characterized by said means for providing a rotational fit between said hub support and said hub, including a shallow cup in said recess to receive the thrust end of said hub.
References Cited (Backward Citations)
US3250069A
Cited
US3336752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |