Patent US3797451A successfully refreshed from Google Patents.
US3797451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear warning device for rotating apparatus provided with an axial thrust bearing
Assignee: TURBOSERVICE
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Filing: 1972-10-16
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Granted: 1974-03-19
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Expires: 1992-10-16
Abstract
Abstract A wear warning device for rotating apparatus provided with an axial thrust bearing, more particularly for drilling turbines, comprises a valve provided in the fluid circulation passages of the turbine, said valve being movable between an open position and a throttling position. A holding member is provided for normally retaining said valve in its open position. A helical spring is provided between said valve and a stationary member for urging said valve towards its throttling position. The holding member is rigid with the stator or rotor part of the turbine, while another member having an abrasive surface is connected to said rotor or stator part, respectively. The original distance between said abrasive surface and said holding member is substantially equal to the admissible wear clearance of the axial thrust bearing. When the wear limit is substantially reached, said abrasive surface cuts through said holding member in order to release said valve. Therefore, the valve is moved to its throttling position under the action of said spring and a pressure surge is transmitted to the surface as a warning signal.
Inventors
- 👤 W Tiraspolsky
- 👤 R Rouviere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:31
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/04; E; E21; E21B; E21B12/00; E21B12/02; E21B4/00; E21B4/02; F; F16; F16C; F16C17/00; F16C17/12; F16C17/24; G; G01; G01N; G01N3/00; G01N3/56; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
Wear warning device for rotating apparatus through which flows a hydraulic current and provided with an axial thrust bearing, more particularly for drilling turbines having a stator part and a rotor part and fluid circulation ducts, comprising axially movable valve means provided in said circulation ducts and movable between an open position and a throttling position, means for urging said valve means towards said throttling position, holding means for normally holding said valve means in said open position, releasing means arranged at an axial distance from said holding means at the most equal to the admissible wear clearance of said axial thrust bearing, said holding means and releasing means being connected to said rotor and stator parts respectively, such that said releasing means releases said valve means by acting on said holding means at the latest when said axial thrust bearing has reached its admissible wear limit, whereby said valve urging means moves said valve means to said throttling position.
Claim 2
Dependent Claim
160 words
Wear warning device for rotating apparatus through which flows a hydraulic current and provided with an axial thrust bearing, more particularly for drilling turbines having a stator part and a rotor part and fluid circulation ducts, comprising axially movable valve means provided in said circulation ducts and movable between an open position and a throttling position, means for urging said valve means towards said throttling position, holding means for normally holding said valve means in said open position, releasing means arranged at an axial distance from said holding means at the most equal to the admissible wear clearance of said axial thrust bearing, said holding means and releasing means being connected to said rotor and stator parts respectively, such that said releasing means releases said valve means by acting on said holding means at the latest when said axial thrust bearing has reached its admissible wear limit, whereby said valve urging means moves said valve means to said throttling position.
Claim 3
Dependent Claim
32 words
Wear warning device according to claim 1, wherein said valve means comprises a duct throttling member and a seat, said throttling member being urged towards said seat by said valve urging means.
Claim 4
Dependent Claim
25 words
Wear warning device according to claim 1, wherein said means for urging said valve means towards said throttling position comprises at least one spring member.
Claim 5
Dependent Claim
41 words
Wear warning device according to claim 1, wherein said means for urging said valve means towards said throttling position comprises at least one spring member the force of which is adapted to the axial direction of movement of said valve means.
Claim 6
Dependent Claim
23 words
Wear warning device according to claim 1, wherein said means for urging said valve means towards said throttling position comprises a helical spring.
Claim 7
Dependent Claim
75 words
Wear warning device according to claim 1, wherein said valve holding means comprises a supporting member, an axially stationary element, said supporting member resting on said stationary element and being connected to said movable means, and an abrasive surface provided on said releasing means, whereby said abrasive surface cuts said supporting member when the wear limit of said axial thrust bearing has been reached in order to release said supporting member and said valve means.
Claim 8
Dependent Claim
187 words
Wear warning device for rotating apparatus through which flows a hydraulic current and provided with an axial thrust bearing, more particularly for drilling turbines having a stator part and a rotor part and fluid circulation ducts, comprising a stator member arranged in said stator part, said stator member having a seat member and a stationary supporting crown, valve means movable between an open position and a throttling position, a movable supporting member connected to said valve means and resting on said stationary supporting crown, spring means located between said valve means and stationary supporting crown and urging said valve means towards its throttling position, a rotor member arranged in said rotor part, an abrasive surface provided on said rotor member, the original distance between said abrasive surface and said supporting Member being at the most equal to the admissible wear clearance of said axial thrust bearing, whereby when said axial thrust bearing wears, said abrasive surface is moved towards said supporting member and cuts said member in order to release said valve means to be moved towards its throttling position under the action of said spring means.
Claim 9
Dependent Claim
187 words
Wear warning device for rotating apparatus through which flows a hydraulic current and provided with an axial thrust bearing, more particularly for drilling turbines having a stator part and a rotor part and fluid circulation ducts, comprising a stator member arranged in said stator part, said stator member having a seat member and a stationary supporting crown, valve means movable between an open position and a throttling position, a movable supporting member connected to said valve means and resting on said stationary supporting crown, spring means located between said valve means and stationary supporting crown and urging said valve means towards its throttling position, a rotor member arranged in said rotor part, an abrasive surface provided on said rotor member, the original distance between said abrasive surface and said supporting Member being at the most equal to the admissible wear clearance of said axial thrust bearing, whereby when said axial thrust bearing wears, said abrasive surface is moved towards said supporting member and cuts said member in order to release said valve means to be moved towards its throttling position under the action of said spring means.
Claim 10
Dependent Claim
34 words
Wear warning device according to claim 7, wherein in said throttling position said valve means partially closes said seat member, whereby a pressure surge is transmitted to the surface to provide a warning signal.
Claim 11
Dependent Claim
15 words
Wear warning device according to claim 7, wherein said abrasive surface is provided with diamonds.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |