Patent US2212588A successfully refreshed from Google Patents.
Patent US4854823A successfully refreshed from Google Patents.
US4854823A
Expired / Lapsed
US
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Leak indicating device for centrifugal pump
Assignee: Richter Chemie Technik GmbH
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Filing: 1988-02-11
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Granted: 1989-08-08
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Expires: 2008-02-11
Abstract
Abstract A leak indicating device for a magnetic centrifugal pump having a separating pot which seals against the pumped medium and which comprises two separating pots with collars inserted one within another. The device contains a ring which is clamped between the collars of the two separating pots. The ring has a radial bore which connects the space between the separating pots to an indicator.
Inventors
- 👤 Paul Hatting
- 👤 Kurt Wienen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:36
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/106; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/025; F04D15/00; F04D15/02; F04D15/0245; F04D15/0263; H02K11/00; H02K11/20; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
In a magnetic centrifugal pump having a separating pot which seals against a pumped medium, said separating pot including inner and outer separating pots each having a collar, said inner separating pot being disposed within said outer separating pot and being separated therefrom by a space, a leak indicating device comprising: a ring positioned between the collars of said separating pots, said ring having a radial bore formed therein and connecting the space between said separating pots to an indicator.
Claim 2
Dependent Claim
80 words
In a magnetic centrifugal pump having a separating pot which seals against a pumped medium, said separating pot including inner and outer separating pots each having a collar, said inner separating pot being disposed within said outer separating pot and being separated therefrom by a space, a leak indicating device comprising: a ring positioned between the collars of said separating pots, said ring having a radial bore formed therein and connecting the space between said separating pots to an indicator.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1, wherein the radial bore is connected to the space between the separating pots by means of a groove extending around the inner surface of the ring.
Claim 4
Dependent Claim
59 words
The apparatus of claim 2, wherein the space between the separating pots is defined by a second groove formed on an outer surface of the inner separating pot, said second groove extending spirally over the outer surface of the inner separating pot and communicating with the first groove, the first groove extending around the inner surface of the ring.
Claim 5
Dependent Claim
34 words
The apparatus of claim 2, wherein the space between the separating pots is filled with a fabric up to the region of the groove, the groove extending around the inner surface of the ring.
Claim 6
Dependent Claim
35 words
The apparatus of claim 2, wherein the space between the separating pots is filled with a plastic mat up to the region of the groove, the groove extending around the inner surface of the ring.
Claim 7
Dependent Claim
59 words
The apparatus of claim 1, wherein the space between the separating pots is defined by a second groove formed on an outer surface of the inner separating pot said second groove extending spirally over the outer surface of the inner separating pot and communicating with the first groove, the first groove extending around the inner surface of the ring.
Claim 8
Dependent Claim
34 words
The apparatus of claim 1, wherein the space between the separating pots is filled with a fabric up to the region of the groove, the groove extending around the inner surface of the ring.
Claim 9
Dependent Claim
35 words
The apparatus of claim 1, wherein the space between the separating pots is filled with a plastic mat up to the region of the groove, the groove extending around the inner surface of the ring.
Claim 10
Independent Claim
17 words
The apparatus as claimed in one of claims 1-8, wherein the indicator is a pressure monitoring device.
Claim 11
Independent Claim
18 words
The apparatus as claimed in one of claims 1-8, wherein the indicator is an electronic moisture measuring device.
Claim 12
Independent Claim
18 words
The apparatus as claimed in one of claims 1-8, wherein the indicator is an electronic resistance measuring device.
References Cited (Backward Citations)
US2662478A
Cited
US3163790A
Cited
US3131638A
Cited
DE1800018A1
Cited
US3605566A
Cited
US3661060A
Cited
US4013384A
Cited
US4120618A
Cited
US4226574A
Cited
DE3334638A1
Cited
US4569634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |