US3663077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball or roller bearing assembly
Assignee: Hitachi Ltd
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Filing: 1971-04-22
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Granted: 1972-05-16
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Expires: 1991-04-22
Abstract
Abstract An antifriction bearing assembly and more particularly a ball or roller bearing assembly in which a pair of annular grease chambers are provided axially adjacent to an annular space formed between outer and inner rings and annular air chambers are further provided axially adjacent to the annular grease chambers, wherein the annular grease chambers are opened only to the annular space and the annular air chambers are communicated with each other by a passage by-passing the grease chambers.
Inventors
- 👤 Toshio Nakamura
- 👤 Hidetoshi Arii
- 👤 Shozo Tatekawa
- 👤 Sadaharu Kawal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:37
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6603
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
105 words
An anti-friction bearing assembly comprising an inner ring mounted on a shaft, an outer ring mounted in a bearing cover, balls or rollers arranged between the inner and outer rings to permit rotation of one ring with respect to the other, annular trough members disposed axially adjacent to the annular space between said inner and outer rings on either side thereof so as to form annular lubricant holding chambers open only toward said balls or rollers, air chambers each being provided axially adjacent to said lubricant holding chambers at the outer side thereof from said annular space, and an air passage interconnecting said air chambers.
Claim 2
Dependent Claim
105 words
An anti-friction bearing assembly comprising an inner ring mounted on a shaft, an outer ring mounted in a bearing cover, balls or rollers arranged between the inner and outer rings to permit rotation of one ring with respect to the other, annular trough members disposed axially adjacent to the annular space between said inner and outer rings on either side thereof so as to form annular lubricant holding chambers open only toward said balls or rollers, air chambers each being provided axially adjacent to said lubricant holding chambers at the outer side thereof from said annular space, and an air passage interconnecting said air chambers.
Claim 3
Dependent Claim
39 words
An anti-friction bearing assembly as defined in claim 1, wherein said trough members have a U-shaped cross-section and are provided with a radial flange portion held between the axial end wall of the outer ring and said bearing cover.
Claim 4
Dependent Claim
28 words
An anti-friction bearing assembly as defined in claim 2, wherein an annular seal is interposed between the radial flange portion of each trough member and said outer ring.
Claim 5
Dependent Claim
43 words
An anti-frictIon bearing assembly as defined in claim 1, wherein the inner surface of said outer edge of the annular trough member and the inner surface of said outer ring are arranged at the same level at least at the lowest portions thereof.
Claim 6
Dependent Claim
21 words
An anti-friction bearing assembly as defined in claim 1, wherein said annular trough members are made of a synthetic resinous substance.
Claim 7
Dependent Claim
22 words
An anti-friction bearing assembly as defined in claim 1, wherein said air passage extends through said bearing cover around said outer ring.
Claim 8
Dependent Claim
30 words
An anti-friction bearing assembly as defined in claim 6, wherein said air chambers are annular chambers defined primarily by said annular trough members and radial portions of said bearing cover.
Claim 9
Dependent Claim
39 words
An anti-friction bearing assembly as defined in claim 7, wherein said trough members have a U-shaped cross-section and are provided with a radial flange portion held between the axial end wall of the outer ring and said bearing cover.
Claim 10
Dependent Claim
28 words
An anti-friction bearing assembly as defined in claim 8, wherein an annular seal is interposed between the radial flange portion of each trough member and said outer ring.
Claim 11
Dependent Claim
30 words
An anti-friction bearing assembly as defined in claim 1, wherein said air chambers are annular chambers defined primarily by said annular trough members and radial portions of said bearing cover.
Claim 12
Dependent Claim
43 words
An anti-friction bearing assembly as defined in claim 10, wherein the inner surface of said outer edge of the annular trough member and the inner surface of said outer ring are arranged at the same level at least at the lowest portions thereof.
Claim 13
Dependent Claim
30 words
An anti-friction bearing assembly as defined in claim 11, wherein said annular lubricant holding chambers are eccentrically disposed with respect to the annular space between said inner and outer rings.
Claim 14
Dependent Claim
65 words
An anti-friction bearing assembly as defined in claim 11, wherein said annular lubricant holding chambers have a larger outer diameter than the annular space between said inner and outer rings and are concentric therewith, at least one of said annular trough members being provided with a chordal land at the level of the outer diameter of said annular space between said inner and outer rings.
Claim 15
Dependent Claim
126 words
An anti-friction bearing assembly comprising an inner ring mounted on a shaft, an outer ring mounted in a bearing cover, balls or rollers arranged between the inner and outer rings to permit rotation of one ring with respect to the other, said bearing cover having substantially radially extending portions defining enclosed annular air chambers axially adjacent said inner and outer rings on either side thereof, and annular trough members disposed in each air chamber directly adjacent said inner and outer air chamber directly adjacent said inner and outer rings so as to form annular lubricant holding chambers occupying only part of said air chambers and communicating only with the annular space between said inner and outer rings, said air chambers being interconnected by an air passage.
Claim 16
Dependent Claim
126 words
An anti-friction bearing assembly comprising an inner ring mounted on a shaft, an outer ring mounted in a bearing cover, balls or rollers arranged between the inner and outer rings to permit rotation of one ring with respect to the other, said bearing cover having substantially radially extending portions defining enclosed annular air chambers axially adjacent said inner and outer rings on either side thereof, and annular trough members disposed in each air chamber directly adjacent said inner and outer air chamber directly adjacent said inner and outer rings so as to form annular lubricant holding chambers occupying only part of said air chambers and communicating only with the annular space between said inner and outer rings, said air chambers being interconnected by an air passage.
Claim 17
Dependent Claim
22 words
An anti-friction bearing assembly as defined in claim 14, wherein said air passage extends through said bearing cover around said outer ring.
Claim 18
Dependent Claim
39 words
An anti-friction bearing assembly as defined in claim 15, wherein said trough members have a U-shaped cross-section and are provided with a radial flange portion held between the axial end wall of the outer ring and said bearing cover.
Claim 19
Dependent Claim
28 words
An anti-friction bearing assembly as defined in claim 16, wherein an annular seal is interposed between the radial flange portion of each trough member and said outer ring.
Claim 20
Dependent Claim
43 words
An anti-friction bearing assembly as defined in claim 14, wherein the inner surface of said outer edge of the annular trough member and the inner surface of said outer ring are arranged at the same level at least at the lowest portions thereof.
Claim 21
Dependent Claim
30 words
An anti-friction bearing assembly as defined in claim 18, wherein said annular lubricant holding chambers are eccentrically disposed with respect to the annular space between said inner and outer rings.
Claim 22
Dependent Claim
65 words
An anti-friction bearing assembly as defined in claim 18, wherein said annular lubricant holding chambers have a larger outer diameter than the annular space between said inner and outer rings and are concentric therewith, at least one of said annular trough members being provided with a chordal land at the level of the outer diameter of said annular space between said inner and outer rings.
Claim 23
Dependent Claim
138 words
An anti-friction bearing assembly comprising an inner bearing ring mounted on a shaft, a bearing cover including an annular hub member having an annular cylindrical recess, an outer ring mounted in said recess, balls or rollers arranged between the inner and outer rings to permit rotation of said shaft with respect to said bearing cover, said hub members having substantially radial portions extending toward said shaft to form enclosed annular spaces on either side of said inner and outer rings defining bearing boxes, annular trough members disposed in said bearing boxes axially adjacent to the annular space between said inner and outer rings so as to form annular lubricant holding chambers occupying only a part of said bearing boxes and communicating only with said annular space, and an air passage through said hub member interconnecting said bearing boxes.
Claim 24
Dependent Claim
138 words
An anti-friction bearing assembly comprising an inner bearing ring mounted on a shaft, a bearing cover including an annular hub member having an annular cylindrical recess, an outer ring mounted in said recess, balls or rollers arranged between the inner and outer rings to permit rotation of said shaft with respect to said bearing cover, said hub members having substantially radial portions extending toward said shaft to form enclosed annular spaces on either side of said inner and outer rings defining bearing boxes, annular trough members disposed in said bearing boxes axially adjacent to the annular space between said inner and outer rings so as to form annular lubricant holding chambers occupying only a part of said bearing boxes and communicating only with said annular space, and an air passage through said hub member interconnecting said bearing boxes.
Claim 25
Dependent Claim
39 words
An anti-friction bearing assembly as defined in claim 21, wherein said trough members have a U-shaped cross-section and are provided with a radial flange portion held between said axial end wall of the outer ring and said bearing cover.
Claim 26
Dependent Claim
28 words
An anti-friction bearing assembly as defined in claim 22, wherein an annular seal is interposed between the radial flange portion of each trough member and said outer ring.
Claim 27
Dependent Claim
21 words
An anti-friction bearing assembly as defined in claim 21, wherein said annular trough members are made of a synthetic resinous substance.
Claim 28
Dependent Claim
28 words
An anti-friction bearing assembly as defined in claim 21, wherein at least one of said substantially radial portions of said hub member is provided as a removable cover.
References Cited (Backward Citations)
FR1176277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |