Patent US3804476A successfully refreshed from Google Patents.
US3804476A
Expired / Lapsed
US
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Bearing devices for rotary machines
Assignee: Hitachi Ltd
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Filing: 1972-07-26
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Granted: 1974-04-16
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Expires: 1992-07-26
Abstract
Abstract A bearing device for rotary machines, for example, electric motors for driving vehicles such as electric cars, of the type comprising roller or ball bearings and using oil or liquid lubricant for lubricating said roller or ball bearings, said bearing device being so designed that the oil or liquid lubricant is automatically supplied in a minimum quantity necessary for lubricating said bearings, whereby the supply interval of lubricant is extended, a leakage of lubricant is eliminated which would otherwise occur due to supply of an excessively large quantity of lubricant, the maintenance duty of the bearing device is alleviated and the continuous use of the bearing device for a long period of time becomes possible without the necessity of disassembly.
Inventors
- 👤 T Nakamura
- 👤 K Takahashi
- 👤 H Egawa
- 👤 S Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/6659; F16C33/6674; F16C33/664; F16C33/6648; F16C19/00; F16C19/22; F16C19/24; F16C19/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
122 words
A bearing device for rotary machines having a substantially horizontally extending rotary shaft, comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing, means is provided for automatically supplying a lubricating oil to said pad, a lubricating oil retaining chamber is formed in the bearing covers, said oil retainable pad being disposed in said oil retaining chamber and being provided with a cylindrical wall means for holding said oil retainable pad out of contact with the rotary shaft.
Claim 2
Dependent Claim
122 words
A bearing device for rotary machines having a substantially horizontally extending rotary shaft, comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing, means is provided for automatically supplying a lubricating oil to said pad, a lubricating oil retaining chamber is formed in the bearing covers, said oil retainable pad being disposed in said oil retaining chamber and being provided with a cylindrical wall means for holding said oil retainable pad out of contact with the rotary shaft.
Claim 3
Dependent Claim
179 words
A bearing device for rotary machines, having a substantially horizontally extending rotary shaft comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing, means is provided for automatically supplying a lubricating oil to said pad, and a lubricating oil retaining chamber for holding the oil retainable pad therein is formed in the bearing cover and an oil passage communicating with means for automatically supplying the lubricating oil is provided in substantially axially adjacent relation to said lubricating oil retaining chamber, said lubricating oil retaining chamber and oil passage communicating with each other by an oil passage hole at the bottom of said lubricating oil retaining chamber, whereby the surface level of oil in said lubricating oil retaining chamber and at the bottom of said roller bearing is defined by the top lEvel of said hole.
Claim 4
Dependent Claim
179 words
A bearing device for rotary machines, having a substantially horizontally extending rotary shaft comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing, means is provided for automatically supplying a lubricating oil to said pad, and a lubricating oil retaining chamber for holding the oil retainable pad therein is formed in the bearing cover and an oil passage communicating with means for automatically supplying the lubricating oil is provided in substantially axially adjacent relation to said lubricating oil retaining chamber, said lubricating oil retaining chamber and oil passage communicating with each other by an oil passage hole at the bottom of said lubricating oil retaining chamber, whereby the surface level of oil in said lubricating oil retaining chamber and at the bottom of said roller bearing is defined by the top lEvel of said hole.
Claim 5
Dependent Claim
35 words
A bearing device for rotary machine, according to claim 2, wherein said lubricating oil retaining chamber has a cylindrical wall by which the oil retainable pad is held out of contact with the rotary shaft.
Claim 6
Dependent Claim
140 words
A bearing device for rotary machines having a substantially horizontally extending rotary shaft comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing; a hermetically sealed oil tank is provided at a level at least higher than the bottom of the inner surface of the outer ring of said roller bearing; a lubricating oil supply opening communicating with said oil tank is located at a position facing said oil retainable pad and the surface level of oil at the lower portion of the roller bearing is defined by the top level of said lubricating oil supply opening.
Claim 7
Dependent Claim
140 words
A bearing device for rotary machines having a substantially horizontally extending rotary shaft comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers the axially opposite side surfaces of said roller bearing, characterized in that an oil retainable pad is provided at a fixed position facing one side surface of said roller bearing; a hermetically sealed oil tank is provided at a level at least higher than the bottom of the inner surface of the outer ring of said roller bearing; a lubricating oil supply opening communicating with said oil tank is located at a position facing said oil retainable pad and the surface level of oil at the lower portion of the roller bearing is defined by the top level of said lubricating oil supply opening.
Claim 8
Dependent Claim
28 words
A bearing device for rotary machines, according to claim 4, wherein said oil retainable pad is disposed in a lubricating oil retaining chamber formed in the bearing cover.
Claim 9
Dependent Claim
35 words
A bearing device for rotary machines, according to claim 5, wherein said lubricating oil retaining chamber has a cylindrical wall by which the oil retainable pad is held out of contact with the rotary shaft.
Claim 10
Dependent Claim
108 words
A bearing device for rotary machines, according to claim 4, wherein a lubricating oil retaining chamber for holding the oil retainable pad therein is formed in the bearing cover and an oil passage communicating with said hermetically sealed oil tank is provided in substantially axially adjacent relation to said lubricating oil retaining chamber, said lubricating oil retaining chamber and oil passage communicating with each other by an oil passage hole at the bottom of said lubricating oil retaining chamber, whereby the surface level of oil in said lubricating oil retaining chamber and at the bottom of the roller bearing is defined by the top level of said hole.
Claim 11
Dependent Claim
35 words
A bearing device for rotary machines, according to claim 7, wherein said lubricating oil retaining chamber has a cylindrical wall by which the oil retainable pad is held out of contact with the rotary shaft.
Claim 12
Dependent Claim
35 words
A bearing device for rotary machines, according to claim 7, wherein said hermetically sealed oil tank is provided with a cover and valve means is provided intermediary of said oil tank and said oil passage.
Claim 13
Dependent Claim
197 words
A bearing device rotary machines having a substantially horizontally extending rotary shaft, comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an annular lubricating oil retaining chamber for holding therein an oil retainable pad facing the adjacent side surface of the roller bearing is formed in the inside surface of one of said bearing covers, while a special ring is mounted in the inside of the other bearing cover, said special ring having formed therein an annular lubricating oil retaining chamber for therein an oil retainable pad facing the adjacent side surface of said roller bearing and an oil passage adjacent said second-mentioned lubricating oil retaining chamber, and said oil passage communicating at its top end with a hermetically sealed oil tank and communicating at its bottom end with said second-mentioned lubricating oil retaining chamber by an oil passage hole, whereby the surface level of oil in said respective lubricating oil retaining chambers and at the bottom of said roller bearing is defined by the top level of said hole.
Claim 14
Dependent Claim
197 words
A bearing device rotary machines having a substantially horizontally extending rotary shaft, comprising a roller bearing for rotatably supporting the substantially horizontally extending rotary shaft, a bearing box supporting said roller bearing and bearing covers covering the axially opposite side surfaces of said roller bearing, characterized in that an annular lubricating oil retaining chamber for holding therein an oil retainable pad facing the adjacent side surface of the roller bearing is formed in the inside surface of one of said bearing covers, while a special ring is mounted in the inside of the other bearing cover, said special ring having formed therein an annular lubricating oil retaining chamber for therein an oil retainable pad facing the adjacent side surface of said roller bearing and an oil passage adjacent said second-mentioned lubricating oil retaining chamber, and said oil passage communicating at its top end with a hermetically sealed oil tank and communicating at its bottom end with said second-mentioned lubricating oil retaining chamber by an oil passage hole, whereby the surface level of oil in said respective lubricating oil retaining chambers and at the bottom of said roller bearing is defined by the top level of said hole.
Claim 15
Dependent Claim
35 words
A bearing device for rotary machines, according to claim 10, wherein said hermetically sealed oil tank is provided with a cover and valve means is provided intermediary of said oil tank and said oil passage.
Claim 16
Dependent Claim
34 words
A bearing device for rotary machines, according to claim 10, wherein an oil passage is provided communicating said lubricating oil retaining chamber with each other at a level below said surface level of oil.
Claim 17
Dependent Claim
42 words
A bearing device for rotary machines, according to claim 12, wherein an oil drain passage os provided communicating said oil passage with the exterior of the machine and a plug is removably fitted into the outer end of said oil drain passage.
Claim 18
Dependent Claim
37 words
A bearing device for rotary machines, according to claim 10, wherein each of said lubricating oil retaining chambers has a cylindrical wall by which the oil retainable pad is held out of contact with the rotary shaft.
Claim 19
Dependent Claim
32 words
A bearing device for rotary machines, according to claim 10, wherein an air bypass passage is provided adjacent the roller bearing, communicating the outside and inside of the machine with each other.
Claim 20
Dependent Claim
93 words
A bearing device for rotary machines, according to claim 11, wherein there are provided an oil passage communicating said lubricating oil retaining chambers with each other at a level below said surface level of oil and an oil drain passage communicating said oil passage to the outside of the machine, and a plug is removable fitted into the outer end of said oil drain passage, and further each of said lubricating oil retaining chambers has a cylindrical wall by which said oil retaining pad is held out of contact with the rotary shaft.
References Cited (Backward Citations)
US947529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |