US3939690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring friction and wear under surrounding high pressure
Assignee: Individual
•
Filing: 1974-04-16
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Granted: 1976-02-24
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Expires: 1994-04-16
Abstract
Abstract A device for performing friction and wear tests inside a closed high-pressure autoclave under additional surrounding high pressure adjustable from the outside, wherein a test element arranged inside the autoclave is rotated by means of a driving shaft passed in a pressure-tight manner through the wall of the autoclave into the latter, a contact pressure in the form of an additional unidirectional load is exerted on the test element by means of a unit arranged inside the autoclave, and both the contact pressure and the torsional moment acting on the test element are determined and indicated outside the autoclave.
Inventors
- 👤 Eduard Kuss
- 👤 Friedhelm Hotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:30
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56; G01N2203/00; G01N2203/0014; G01N2203/0016; G01N2203/0019
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
178 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight seal between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element and comprising a torsional rod extending between said drive shaft and said support means, a pair of magnetized discs spaced on said torsional rod and a pair of stationary inductive scanning heads positioned within said chamber, and h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means.
Claim 2
Independent Claim
178 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight seal between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element and comprising a torsional rod extending between said drive shaft and said support means, a pair of magnetized discs spaced on said torsional rod and a pair of stationary inductive scanning heads positioned within said chamber, and h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means.
Claim 3
Dependent Claim
39 words
A device according to claim 1 wherein said means located in said chamber for exerting contact pressure is a fluid operated means, said means for applying fluid pressure in said chamber being adapted to operate said fluid operated means.
Claim 4
Dependent Claim
18 words
A device according to claim 2 wherein said fluid operated means is a piston-cylinder arrangement within said chamber.
Claim 5
Dependent Claim
30 words
A device according to claim 1 wherein said means for exerting contact pressure is adapted to apply said pressure in the direction of the rotational axis of said support means.
Claim 6
Dependent Claim
24 words
A device according to claim 1 further comprising electrical resistance means located in said chamber for detecting said contact pressure on said test element.
Claim 7
Dependent Claim
26 words
A device according to claim 1 further comprising wire strain gauge means located in said chamber for detecting said contact pressure exerted on said test element.
Claim 8
Dependent Claim
41 words
A device according to claim 1 further comprising electronic means for converting electrical signals from said scanning heads into square-wave impulses, the length of said impulses corresponding to the phase shift of said signals, and means for indicating said phase shift.
Claim 9
Dependent Claim
58 words
A device according to claim 7 wherein said electronic means comprises separate means associated with each scanning head for converting electrical signals from said scanning head into square-wave inpulses and for comparing the length of the square-wave impulses which correspond to the phase shift between the signals of the scanning heads and for indicating the average value thereof.
Claim 10
Dependent Claim
41 words
A device according to claim 1 further comprising a driving motor located outside said chamber for driving said drive shaft, said driving motor including electronic means for automatically switching off said driving motor at the moment of welding of test parts.
Claim 11
Dependent Claim
35 words
A device according to claim 9 further comprising an overload shearing clutch positioned between said driving motor and said drive shaft, said clutch being adapted to disengage at the moment of welding of test parts.
Claim 12
Dependent Claim
53 words
A device according to claim 1 further comprising means for isolating said support means, a portion of said contact pressure means and said test element from the remaining interior portion of said chamber, said isolating means being adapted to transmit said fluid pressure from said chamber into the interior of said isolating means.
Claim 13
Dependent Claim
13 words
A device according to claim 1 adapted to test a four-ball test element.
Claim 14
Dependent Claim
13 words
A device according to claim 1 adapted to test a roller test element.
Claim 15
Dependent Claim
13 words
A device according to claim 1 adapted to test a gear test element.
Claim 16
Independent Claim
167 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight seal between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element and comprising a pair of spaced discs rotatably mounted on said drive shaft, each disc including grooves therein, and a pair of stationary scanning heads, and h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means.
Claim 17
Independent Claim
167 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight seal between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element and comprising a pair of spaced discs rotatably mounted on said drive shaft, each disc including grooves therein, and a pair of stationary scanning heads, and h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means.
Claim 18
Dependent Claim
41 words
A device according to claim 15 further comprising electronic means for converting electrical signals from said scanning heads into square-wave impulses, the length of said impulses corresponding to the phase shift of said signals, and means for indicating said phase shift.
Claim 19
Dependent Claim
58 words
A device according to claim 16 wherein said electronic means comprises separate means associated with each scanning head for converting electrical signals from said scanning head into square-wave impulses and for comparing the length of the square-wave impulses which correspond to the phase shift between the signals of the scanning heads and for indicating the average values thereof.
Claim 20
Independent Claim
259 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight elastic sealing ring between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element, h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means, i. a first pressure ring about said drive shaft at the side of said sealing ring facing away from said chamber, j. a second pressure ring about said drive shaft at the side of said sealing ring facing towards said chamber, k. a collar mounted on said drive shaft at the side of said second pressure ring facing towards said chamber, and l. bearing means between said collar and said second pressure ring, m. whereby fluid pressure in said chamber presses said collar against said second pressure ring and presses said second pressure ring against said elastic sealing ring in an axial direction sealing said elastic sealing ring against the peripheral surface of said drive shaft.
Claim 21
Independent Claim
259 words
A device for measuring friction and wear under coexisting surrounding high pressure, comprising: a. a high-pressure autoclave including walls defining a chamber, b. means for supporting at least one test element in said chamber, c. a rotatably mounted drive shaft extending through a wall from the exterior to the interior of said chamber and arranged to rotate said support means in said chamber, d. a pressure-tight elastic sealing ring between said drive shaft and said wall, e. means for applying fluid pressure in said chamber, f. means located in said chamber for exerting contact pressure in the form of a unidirectional load on said test element, g. means located in said chamber for detecting the torsional moment applied to said test element, h. means outside said chamber for indicating both said contact pressure and said torsional moment as detected by said detecting means, i. a first pressure ring about said drive shaft at the side of said sealing ring facing away from said chamber, j. a second pressure ring about said drive shaft at the side of said sealing ring facing towards said chamber, k. a collar mounted on said drive shaft at the side of said second pressure ring facing towards said chamber, and l. bearing means between said collar and said second pressure ring, m. whereby fluid pressure in said chamber presses said collar against said second pressure ring and presses said second pressure ring against said elastic sealing ring in an axial direction sealing said elastic sealing ring against the peripheral surface of said drive shaft.
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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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |