US3897116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing wear detector
Assignee: Crane Co
•
Filing: 1973-03-19
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Granted: 1975-07-29
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Expires: 1993-03-19
Abstract
Abstract A bearing wear detector is provided for a shaft supported in a bearing whose wear is to be monitored. The detector includes a metallic member carried by the shaft and other metallic member in fixed spaced relationship to the shaft carried member, one of the members having an insulating coating. Bearing wear causes the insulating coating to be worn through, and metallic contact of the members is made so that an alarm circuit is thereby completed.
Inventors
- 👤 Richard G Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:44
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56; F; F16; F16C; F16C17/00; F16C17/12; F16C17/24; F16C17/246
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
In combination with a bearing and rotating shaft assembly, a wear detector, said wear detector comprising a closed electrically conductive wire loop, an insulated covering on said wire loop, a holder, said holder including a mounting shank terminating in a recessed end positioned about an end portion of the shaft in outwardly spaced relation thereto, the covered loop being positioned within said recessed end for mounting thereby in outwardly spaced surrounding relation to the end portion of the shaft, said insulated covering insulating said loop from the shaft completely thereabout for abrasion by the shaft upon radial displacement of said shaft in any direction upon a wearing of the bearing to effect an electrical connection between the shaft and wire loop, conductor leads extending from said loop, and alarm means electrically engaged with said leads.
Claim 2
Dependent Claim
135 words
In combination with a bearing and rotating shaft assembly, a wear detector, said wear detector comprising a closed electrically conductive wire loop, an insulated covering on said wire loop, a holder, said holder including a mounting shank terminating in a recessed end positioned about an end portion of the shaft in outwardly spaced relation thereto, the covered loop being positioned within said recessed end for mounting thereby in outwardly spaced surrounding relation to the end portion of the shaft, said insulated covering insulating said loop from the shaft completely thereabout for abrasion by the shaft upon radial displacement of said shaft in any direction upon a wearing of the bearing to effect an electrical connection between the shaft and wire loop, conductor leads extending from said loop, and alarm means electrically engaged with said leads.
Claim 3
Dependent Claim
38 words
The combination of claim 1 including a housing about said bearing and shaft assembly, said holder shank being mounted through said housing, and a manipulating head portion on the opposite end of the shank from the recessed end.
Claim 4
Dependent Claim
15 words
The combination of claim 2 including sealing means in said holder precluding fluid leakage therethrough.
Claim 5
Dependent Claim
18 words
The combination of claim 3 wherein said conductor leads extend longitudinally through said holder and head portion thereon.
Claim 6
Dependent Claim
20 words
The combination of claim 4 including a circumferential groove within said recess, said wire loop being received within said groove.
References Cited (Backward Citations)
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |