US4658643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting abnormality and limit of use of plain bearings
Assignee: Hitachi Ltd
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Filing: 1986-02-20
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Granted: 1987-04-21
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Expires: 2006-02-20
Abstract
Abstract This invention is related to an apparatus for detecting an abnormal condition and limit of use of a forced lubricating plain bearing which supports a rotary shaft. An oiling pressure bore is formed in the plain bearing, and a pressure detector is connected to this oiling pressure bore. The oiling pressure bore is communicated with a lubricating oil feed bore via a throttle element. A closed portion of the oiling pressure bore is melted and broken by the heat generated when seizure occurs on the plain bearing, to cause a decrease in the oil pressure. This decrease in the oil pressure is detected to ascertain that the plain bearing is in an abnormal condition or reaches a limit of use.
Inventors
- 👤 Yoshihiko Nakayama
- 👤 Teruyoshi Miyatake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:04
CPC Classifications
G; G01; G01M; G01M13/00; G01M13/04; F; F16; F16C; F16C17/00; F16C17/02; F16C17/12; F16C17/24; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0644; F16C32/0648; F16C32/0681; F16C32/0685
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
166 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a metal member attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage means formed through said plain bearing base metal and said metal member and adapted to be used for supplying a lubricating oil to a clearance between said metal member and said rotary shaft; an oil suppling source means connected to said oiling passage means; an oiling pressure bore means formed through said plain bearing base metal and a part of said metal member and closed at its one end with said metal member; a pressure detecting means connected to said oiling pressure bore means; a pipe means for communicating either one of said oiling passage means and said oil suppling source means with said oiling pressure bore means; and a throttle means provided at an intermediate portion of said pipe means.
Claim 2
Independent Claim
166 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a metal member attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage means formed through said plain bearing base metal and said metal member and adapted to be used for supplying a lubricating oil to a clearance between said metal member and said rotary shaft; an oil suppling source means connected to said oiling passage means; an oiling pressure bore means formed through said plain bearing base metal and a part of said metal member and closed at its one end with said metal member; a pressure detecting means connected to said oiling pressure bore means; a pipe means for communicating either one of said oiling passage means and said oil suppling source means with said oiling pressure bore means; and a throttle means provided at an intermediate portion of said pipe means.
Claim 3
Dependent Claim
25 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 1, wherein said throttle means consists of an orifice.
Claim 4
Dependent Claim
26 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 1, wherein said metal member consists of a babbit metal.
Claim 5
Dependent Claim
55 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 1, wherein said pressure detecting means is adapted to generate a signal, which indicates that said plain bearing is in an abnormal condition or reaches a limit of use, when a pressure lower than a set level is detected.
Claim 6
Independent Claim
190 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a metal member attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage means formed through said plain bearing base metal and said metal member and adapted to be used for supplying a lubricating oil to a clearance between said metal member and said rotary shaft; an oil suppling source means having an oil feed pipe communicated with said oiling passage means, and an oil suppling source connected to said oil feed pipe; an oiling pressure bore means formed through said plain bearing base metal and a part of said metal member so that the bottom of said bore means is positioned in said metal member; a pressure detecting means connected to an open end of said oiling pressure bore means; a pipe means for communicating either one of said oiling passage means and said oil suppling source means with said oiling pressure bore means; and a throttle means provided at an intermediate portion of said pipe means.
Claim 7
Independent Claim
190 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a metal member attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage means formed through said plain bearing base metal and said metal member and adapted to be used for supplying a lubricating oil to a clearance between said metal member and said rotary shaft; an oil suppling source means having an oil feed pipe communicated with said oiling passage means, and an oil suppling source connected to said oil feed pipe; an oiling pressure bore means formed through said plain bearing base metal and a part of said metal member so that the bottom of said bore means is positioned in said metal member; a pressure detecting means connected to an open end of said oiling pressure bore means; a pipe means for communicating either one of said oiling passage means and said oil suppling source means with said oiling pressure bore means; and a throttle means provided at an intermediate portion of said pipe means.
Claim 8
Dependent Claim
25 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 5, wherein said throttle means consists of an orifice.
Claim 9
Dependent Claim
26 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 5, wherein said metal member consists of a babbit metal.
Claim 10
Dependent Claim
55 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 5, wherein said pressure detecting means is adapted to generate a signal, which indicates that said plain bearing is in an abnormal condition or reaches a limit of use, when a pressure lower than a set level is detected.
Claim 11
Dependent Claim
55 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 5, wherein a side bore communicated with said oiling pressure bore means is formed, a plug being inserted in said side bore, which plug consists of a material of a melting point lower than that of said metal member.
Claim 12
Independent Claim
183 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a babbit metal attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage beans formed through said plain bearing base metal and said babbit metal and adapted to be used for supplying a lubricating oil to a clearance between said babbit metal and said rotary shaft; an oil suppling source means having an oil feed pipe communicated with said oiling passage means, and an oil suppling source connected to said oil feed pipe; an oiling pressure bore means formed through said plain bearing base metal and a part of said babbit metal so that the bottom of said bore means is positioned in said babbit metal; a pressure detecting switch connected to an open end of said oiling pressure bore; a pipe means for communicating said oiling passage means and said oiling pressure bore means with each other; and a throttle means provided at an intermediate portion of said pipe means.
Claim 13
Independent Claim
183 words
An apparatus for detecting the abnormality and limit of use of plain bearings, comprising a plain bearing which has a bearing base metal, and a babbit metal attached to the inner surface of said bearing base metal and supporting a rotary shaft; an oiling passage beans formed through said plain bearing base metal and said babbit metal and adapted to be used for supplying a lubricating oil to a clearance between said babbit metal and said rotary shaft; an oil suppling source means having an oil feed pipe communicated with said oiling passage means, and an oil suppling source connected to said oil feed pipe; an oiling pressure bore means formed through said plain bearing base metal and a part of said babbit metal so that the bottom of said bore means is positioned in said babbit metal; a pressure detecting switch connected to an open end of said oiling pressure bore; a pipe means for communicating said oiling passage means and said oiling pressure bore means with each other; and a throttle means provided at an intermediate portion of said pipe means.
Claim 14
Dependent Claim
25 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 10, wherein said throttle means consists of an orifice.
Claim 15
Dependent Claim
55 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 10, wherein said pressure detecting means is adapted to generate a signal, which indicates that said plain bearing is in an abnormal condition or reaches a limit of use, when a pressure lower than a set level is detected.
Claim 16
Dependent Claim
55 words
An apparatus for detecting the abnormality and limit of use of plain bearings according to claim 10, wherein a side bore communicated with said oiling pressure bore means is formed, a plug being inserted in said side bore, which plug consists of a material of a melting point lower than that of said metal member.
References Cited (Backward Citations)
US4406169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |