US4775295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump casing
Assignee: Klein Schanzlin and Becker AG
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Filing: 1986-05-09
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Granted: 1988-10-04
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Expires: 2006-05-09
Abstract
Abstract The subject of the invention is a casing jacket for centrifugal pumps in which the suction side connecting flange is integrated in the casing jacket and the actual suction nozzle is located inside the casing jacket. A high degree of pressure resistance is obtained by embossed, corrugation-like spaces for the suction side flange connecting means and a corresponding curved or spherical outer contour of the casing jacket.
Inventors
- 👤 Jorg Starke
- 👤 Rolf Scherer
- 👤 Renzo Ghiotto
- 👤 Primo Lovisetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/4266
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A centrifugal pump casing having a suction side and a pressure side and comprising a deformation-resistant hollow jacket consisting of sheet metal and having means for fastening it to a support at the pressure side of the casing, said jacket further having a plurality of reinforcing corrugations at the suction side of the casing; a connecting flange rigid with said jacket in the region of said corrugations; and means for connecting said jacket to a suction line, including fastener means provided at said corrugations, said corrugations having holes for said fastener means.
Claim 2
Dependent Claim
92 words
A centrifugal pump casing having a suction side and a pressure side and comprising a deformation-resistant hollow jacket consisting of sheet metal and having means for fastening it to a support at the pressure side of the casing, said jacket further having a plurality of reinforcing corrugations at the suction side of the casing; a connecting flange rigid with said jacket in the region of said corrugations; and means for connecting said jacket to a suction line, including fastener means provided at said corrugations, said corrugations having holes for said fastener means.
Claim 3
Dependent Claim
16 words
The casing of claim 1, wherein said corrugations have abutments in the region of said flange.
Claim 4
Dependent Claim
16 words
The casing of claim 1, further comprising means for rigidly securing said flange to said jacket.
Claim 5
Dependent Claim
43 words
The casing of claim 1, further comprising an insert provided in and affixed to said jacket and including a suction nozzle in the region of said flange, an impeller in said jacket, and a split seal provided between said impeller and said nozzle.
Claim 6
Dependent Claim
22 words
The casing of claim 1, wherein said jacket includes a portion constituting a suction nozzle at the suction side of the casing.
Claim 7
Dependent Claim
16 words
The casing of claim 1, wherein said jacket includes a portion defining a lateral impeller chamber.
Claim 8
Dependent Claim
41 words
The casing of claim 1, wherein said jacket includes a suction nozzle at the suction side of the casing and defines a space surrounding said nozzle, and further comprising reinforcing means provided in said jacket between said nozzle and said space.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |