Patent US3873242A successfully refreshed from Google Patents.
US3873242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid machines
Assignee: Weir Pumps Ltd
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Filing: 1973-09-17
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Granted: 1975-03-25
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Expires: 1993-09-17
Abstract
Abstract A rotodynamic pump includes a pump casing housing a shaft mounted impeller, which shaft is driven by a suitable drive motor, and suction and discharge ducts in the pump casing; and pipelines are provided for the supply and discharge of fluid to and from the suction and discharge ducts respectively. By the present invention, the pipelines are fixedly carried on a frame which is supported by any suitable base member for example, by the pump drive motor, such that load on the frame is not transmitted to the pump casing, and branch conduits connect the support member and the ducts for continuity of pipeline to the ducts. The arrangement enables the pump casing to be free of pipe load and the pump to be removable in toto or in part without disturbance to the pipelines; also thermal loads due to differential thermal expansion between the frame and pump casing are not transmitted to the pump casing.
Inventors
- 👤 Ronald Colquhoun Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:08
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/06; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/60; F04D29/62; F04D29/628
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
A pump installation including: a pump comprising a casing having a removable front cover and a back wall, an impeller shaft penetrating the back wall of the casing, sealing means sealing said penetration of said back wall, a rotary impeller mounted on said impeller shaft inside the casing, a fluid suction duct in the casing for delivery of fluid to said impeller, an inlet to said fluid suction duct located in a lateral wall of the casing, a fluid discharge duct in the casing for discharge of fluid from the impeller, and an outlet from said fluid discharge duct located in said lateral wall of the casing; a motor having a casing and being connected to the impeller shaft for driving the pump; bracket means rigidly interconnecting the motor and pump casings; a support member formed by an extension of said bracket means and adapted to fixedly carry pipes such that the pump casing is substantially free from pipe loads and thermal loads due to differential thermal expansion between the pump casing and the support member; and conduit means interconnecting the support member and said inlet and outlet; whereby on removal of said front cover said pump can be disassembled without disturbance to the pipes.
Claim 2
Dependent Claim
205 words
A pump installation including: a pump comprising a casing having a removable front cover and a back wall, an impeller shaft penetrating the back wall of the casing, sealing means sealing said penetration of said back wall, a rotary impeller mounted on said impeller shaft inside the casing, a fluid suction duct in the casing for delivery of fluid to said impeller, an inlet to said fluid suction duct located in a lateral wall of the casing, a fluid discharge duct in the casing for discharge of fluid from the impeller, and an outlet from said fluid discharge duct located in said lateral wall of the casing; a motor having a casing and being connected to the impeller shaft for driving the pump; bracket means rigidly interconnecting the motor and pump casings; a support member formed by an extension of said bracket means and adapted to fixedly carry pipes such that the pump casing is substantially free from pipe loads and thermal loads due to differential thermal expansion between the pump casing and the support member; and conduit means interconnecting the support member and said inlet and outlet; whereby on removal of said front cover said pump can be disassembled without disturbance to the pipes.
Claim 3
Dependent Claim
56 words
A pump installation as claimed in claim 1, wherein the support member has through bores to permit fluid communication between the pipes and said ducts, and the conduit means includes cylindrical branch elements each of which extends into a respective one of the through bores to form a continuous fluid conduit with one of the pipes.
Claim 4
Dependent Claim
25 words
A pump installation as claimed in claim 1, wherein a socket is formed in said inlet and said outlet to receive said cylindrical branch elements.
Claim 5
Dependent Claim
36 words
A pump installation as claimed in claim 3, wherein the through bores each have a stepped socket portion housing, a sealing ring for engagement with one of the pipes to seal it to the support member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |