EP0759544A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Bearing with temperature sensor
Assignee: Timken US LLC
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Filing: 1996-08-22
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Granted: —
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Expires: 2016-08-22
Abstract
Abstract A temperature sensor (22) is mounted on an inside surface of a stationary race of a bearing around which a rotatable race rotates. Electric signals from the temperature sensor are converted into acoustic signals by an electric-acoustic transducer (24). Without the use of any hard wires, the acoustic signals are received by an acoustic-electric transducer (40) mounted on the outside surface of a bearing housing (10). These electric signals from the acoustic-electric transducer are frequency demodulated and converted into signals which indicate on a display panel the temperatures within the bearing.
Inventors
- 👤 Paul E. Duffy
- 👤 Richard W. Browner
- 👤 Richard L. Lemoine
- 👤 Mark I. Jurras, Iii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/52; F16C19/525; B; B21; B21B; B21B31/00; B21B31/07; G; G01; G01K; G01K1/00; G01K1/02; G01K1/024; B21B38/00; B21B38/006; F16C19/22; F16C19/34; F16C19/38; F16C23/00; F16C23/06; F16C23/08; F16C23/082; F16C23/086; F16C2322/00; F16C2322/12; F16C35/00; F16C35/04; F16C35/042; F16C35/047; F16C41/00; F16C41/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
In combination: a bearing housing (10); an annular rotatable race within said housing; an annular stationary race mounted in the housing having a greater inside diameter than the outside diameter of the annular rotatable race; a plurality of rollers (16) located in an annular space between said races; and at least one temperature sensor (22) located on the inside surface of the annular stationary race; characterised by an electric-acoustic transducer (24) located on the annular stationary race, said electric-acoustic transducer being adapted to transmit acoustic signals through said annular stationary race related to the temperatures within the housing (10); an electronic system (26) interconnecting said temperature sensor (22) and said electric-acoustic transducer (24); at least one acoustic-electric transducer (40) mounted on the outside surface of said housing (10), said acoustic-electric transducer being adapted to receive the acoustic signals transmitted by said electric-acoustic transducer (24) and convert said acoustic signals into electric signals related to the temperatures within the annular stationary race; and an electronic system (42) connected to the acoustic-electric transducer (40) for indicating the temperatures within the annular stationary race.
Claim 2
Dependent Claim
16 words
A combination according to claim 1, wherein the temperature sensor (22) is an active silicon device.
Claim 3
Dependent Claim
21 words
A combination according to claim 1 or 2, wherein the electric-acoustic transducer (24) and the acoustic-electric transducer (40) contain piezoelectric crystals.
Claim 4
Dependent Claim
40 words
A combination according to claim 1, 2 or 3, wherein the electronic system (26) interconnecting said temperature sensor and said electric-acoustic transducer (24) has a frequency-modulator (36), the frequency of the transmitted signal varying in proportion to the temperature level.
Claim 5
Dependent Claim
49 words
A combination according to any one of the preceding claims, wherein the electronic system (42) has a frequency demodulator (46), an electronic converter (46) for converting the output from the demodulator into a value that will indicate the temperatures within the annular stationary race, and a display panel (50).
Claim 6
Dependent Claim
36 words
A combination according to any one of the preceding claims, wherein the annular stationary race includes a recess (28) and the electric-acoustic transducer (24) mounted on the annular stationary race is mounted in the recess (28).
References Cited (Backward Citations)
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