US3722757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping device with self centering spherical seating surfaces
Assignee: Xylem Water Solutions AB
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Filing: 1970-08-28
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Granted: 1973-03-27
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Expires: 1990-08-28
Abstract
Abstract A pump unit immersible in the liquid of a well, comprising a liquidtight motor, a pump housing with an outlet connection and guiding means which, on lowering of the pump unit, guide the outlet connection into the vicinity of a fixed coupling unit of the outlet pipe. The pump unit having a seating while the outlet connection has a tapered aperture fitting thereto, so that the connection, after the unit has been essentially lowered, can be brought up against the coupling unit, into sealing engagement with the seating, essentially in the axial direction of the coupling unit. The seating surfaces being spherical to allow for slight misalignment.
Inventors
- 👤 J Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:44
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D29/607; F16; F16L; F16L37/00; F16L37/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
In combination with a pump device of the type that is submergible for connection with a submerged delivery pipe, wherein the pump device includes a liquid-tight enclosed motor and a centrifugal pump having an outlet connection and guiding means permitting the lowering of the pump device to the delivery pipe, the improvements which comprise: a. self centering spherical seating surfaces on the submerged delivery pipe and on the pump outlet connection thereby permitting a limited misalignment along the axial direction of the outlet connection while maintaining a sealing relationship, b. a base member for supporting the delivery pipe, and c. a supporting member extending relatively parallel and outward from the sealing surface of the delivery pipe and below the delivery pipe, the pump outlet connection having a protruding support portion adjacent its sealing surface for engagement with the support member of the delivery pipe.
Claim 2
Dependent Claim
144 words
In combination with a pump device of the type that is submergible for connection with a submerged delivery pipe, wherein the pump device includes a liquid-tight enclosed motor and a centrifugal pump having an outlet connection and guiding means permitting the lowering of the pump device to the delivery pipe, the improvements which comprise: a. self centering spherical seating surfaces on the submerged delivery pipe and on the pump outlet connection thereby permitting a limited misalignment along the axial direction of the outlet connection while maintaining a sealing relationship, b. a base member for supporting the delivery pipe, and c. a supporting member extending relatively parallel and outward from the sealing surface of the delivery pipe and below the delivery pipe, the pump outlet connection having a protruding support portion adjacent its sealing surface for engagement with the support member of the delivery pipe.
Claim 3
Dependent Claim
15 words
The combination of claim 1, wherein the sealing surface of the delivery pipe is conical.
Claim 4
Dependent Claim
16 words
The combination of claim 1 wherein the sealing surface of the pump outlet connection is conical.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |