US3946593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for testing bearing grease
Assignee: Creusot Loire SA
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Filing: 1974-06-10
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Granted: 1976-03-30
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Expires: 1994-06-10
Abstract
Abstract A machine for testing bearing grease in which a shaft is supported in two bearings the outer race of each of which is set in a housing for the grease to be tested and breaking means for the shaft which will cause the bearings to heat.
Inventors
- 👤 Gabriel Ruget
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
A machine for testing greases on bearings, comprising a frame, a shaft, means mounted on said frame for rotating the shaft, two spaced housings containing the grease to be tested, two spaced bearings, each bearing comprising an inner race fixed to the shaft and an outer cage rigidly locked to one of said housings, seals interposed between the shaft and said housings, and means for braking and for heating the bearings including an inner rotor secured to the shaft between the two bearings, a stator locked rotationally with respect to the frame, and a cheek mounted on said stator on each side of the rotor each cheek supporting one of said housings of one.
Claim 2
Dependent Claim
114 words
A machine for testing greases on bearings, comprising a frame, a shaft, means mounted on said frame for rotating the shaft, two spaced housings containing the grease to be tested, two spaced bearings, each bearing comprising an inner race fixed to the shaft and an outer cage rigidly locked to one of said housings, seals interposed between the shaft and said housings, and means for braking and for heating the bearings including an inner rotor secured to the shaft between the two bearings, a stator locked rotationally with respect to the frame, and a cheek mounted on said stator on each side of the rotor each cheek supporting one of said housings of one.
Claim 3
Dependent Claim
40 words
A grease testing machine as in claim 1, wherein the means for braking the shaft is an electromagnetic brake and means for regulating the temperature of the bearings by control of the intensity of the excitation current of the brake.
Claim 4
Dependent Claim
17 words
A grease testing machine as in claim 2, wherein the braking means is an electromagnetic powder coupling.
Claim 5
Dependent Claim
29 words
A grease testing machine as in claim 3, wherein the powder coupling includes two coils mounted in the stator symmetrical with respect to the equatorial plane of the rotor.
Claim 6
Dependent Claim
33 words
A grease testing machine as in claim 4, including a means for regulating the temperature of each bearing by control of the intensity of the excitation current in the coil adjacent the bearing.
Claim 7
Dependent Claim
20 words
A grease testing machine as in claim 4, including a narrow deep throat in the equatorial plane of the rotor.
Claim 8
Dependent Claim
38 words
A grease testing machine as in claim 1, including a circular recess in each of said housings for receiving the grease and a duct at the bottom of each recess for exhaust of melted grease towards the outside.
Claim 9
Dependent Claim
46 words
A grease testing machine as in claim 1, including an aperture in each of said housings for supplying the grease to be tested a circular recess in each of said housings for distribution of the grease in said housings, said aperture opening into said circular recess.
Claim 10
Dependent Claim
23 words
A grease testing machine as in claim 1, including means for rapid disconnection of the means for rotating the shaft from the shaft.
Claim 11
Dependent Claim
115 words
A grease testing machine as in claim 9, including automatic means driven by the shaft and at regular intervals of time: terminating the actuation of the brake, disconnecting the shaft from the means for rotating the shaft, recording in respect of the freely rotating rotor during a given short period t 1 the number of revolutions of the shaft, then at the end of an interval of time t 2 recording during the same period t 1 the number of revolutions of the shaft, and recording the difference between the two numbers of revolutions and therefore the drag torque of the two bearings at the average speed during the interval of time t 2 .
Claim 12
Dependent Claim
64 words
A grease testing machine as in claim 1, the means for rotating the shaft including at least one driving roller, a receiver roller rigidly locked to the shaft and frictionally engaging the driving roller, the driving roller being mounted on a driving roller shaft, a motor rotating the shaft and a beam hinged on the frame supporting the motor and the driving roller shaft.
Claim 13
Dependent Claim
28 words
A grese testing machine as in claim 11, the beam havng a part extending beyond the roller away from the beam hinge and a load on the part.
Claim 14
Dependent Claim
47 words
A grease testing machine as in claim 11, including two driving rollers for driving two receiver rollers on the shaft symmetrically with respect to the median plane of the rotor, each driving roller being mounted on a beam and driven by a motor mounted on the beam.
Claim 15
Dependent Claim
19 words
A grease testing machine as in claim 9 the means for rapid disconnection including means for raising the beam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |