Patent US3844629A successfully refreshed from Google Patents.
US3844629A
Expired / Lapsed
US
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Linear motion ball bearings
Assignee: AJB INDUSTRIES Ltd
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Filing: 1973-08-09
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Granted: 1974-10-29
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Expires: 1993-08-09
Abstract
Abstract A linear motion ball bearing comprises a ball retainer of generally cylindrical sleeve form which is provided with a plurality of raceways. A plurality of balls substantially fills each raceways. The bearing also has a plurality of load-carrying plates. Each of the raceways has an axially extending portion over which the balls contained therein are, in use, under load and a portion over which the balls contained therein are, in use, load free. Each load-carrying plate is co-operable for loadbearing purposes with the balls under load of a pair of adjacent raceways.
Inventors
- 👤 D Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:41
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/04; F16C29/06; F16C29/068; F16C29/0683; F16C29/0685; F16C29/069
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with a plurality of raceways, a plurality of balls substantially filling each raceway and a pluralIty of loadcarrying plates supported by said ball retainer, each of said raceways extending transversely substantially tangentially with respect to said shaft, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls being in contact with said shaft and a respective one of said load-carrying plates when in said load bearing portions and being out of contact with both said shaft and any of said load-carrying plates when in said load free portions, wherein each of said load-carrying plates contacts said balls in said load bearing portions of a pair of adjacent raceways.
Claim 2
Dependent Claim
148 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with a plurality of raceways, a plurality of balls substantially filling each raceway and a pluralIty of loadcarrying plates supported by said ball retainer, each of said raceways extending transversely substantially tangentially with respect to said shaft, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls being in contact with said shaft and a respective one of said load-carrying plates when in said load bearing portions and being out of contact with both said shaft and any of said load-carrying plates when in said load free portions, wherein each of said load-carrying plates contacts said balls in said load bearing portions of a pair of adjacent raceways.
Claim 3
Dependent Claim
23 words
A linear ball bearing according to claim 1, wherein said balls in said load free portions of each pair of adjacent raceways interdigitate.
Claim 4
Dependent Claim
18 words
A linear ball bearing according to claim 1, wherein each of said load-carrying plates is made of steel.
Claim 5
Dependent Claim
23 words
A linear ball bearing according to claim 1, wherein each of said load-carrying plates has a transversely extending central portion of increased thickness.
Claim 6
Dependent Claim
31 words
A linear ball bearing according to claim 1, wherein each of said load-carrying plates is provided with a respective groove for guiding the balls of each of its pair of raceways.
Claim 7
Dependent Claim
23 words
A linear ball bearing according to claim 1, wherein said ball retainer is provided with eight raceways, said bearing having four load-carrying plates.
Claim 8
Dependent Claim
105 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with a plurality of raceways, a plurality of balls substantially filling each raceway and a plurality of load-carrying steel plates supported by said ball retainer, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls in said load free portions of each pair of adjacent raceways interdigitating and each of said load-carrying plates being aligned with load bearing portions of a pair of adjacent raceways.
Claim 9
Dependent Claim
105 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with a plurality of raceways, a plurality of balls substantially filling each raceway and a plurality of load-carrying steel plates supported by said ball retainer, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls in said load free portions of each pair of adjacent raceways interdigitating and each of said load-carrying plates being aligned with load bearing portions of a pair of adjacent raceways.
Claim 10
Dependent Claim
23 words
A linear ball bearing according to claim 7, wherein each of said load-carrying plates has a transversely extending central portion of increased thickness.
Claim 11
Dependent Claim
132 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with eight raceways, a plurality of balls substantially filling each raceway and four loadcarrying steel plates supported by said ball retainer, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls in said load free portions of each pair of adjacent raceways interdigitating and each of said loadcarrying plates being: a. aligned with said ball bearing portions of a pair of adjacent raceways; b. provided with a respective groove for guiding the balls of each of its pair of raceways; and c. provided with a transversely extending central portion of increased thickness.
Claim 12
Dependent Claim
132 words
A linear ball bearing for axial movement along a round shaft, said bearing comprising a cylindrical sleeve ball retainer provided with eight raceways, a plurality of balls substantially filling each raceway and four loadcarrying steel plates supported by said ball retainer, each of said raceways having an axially extending load bearing portion and an axially extending load free portion interconnected at each axial end by a respective curved portion, said balls in said load free portions of each pair of adjacent raceways interdigitating and each of said loadcarrying plates being: a. aligned with said ball bearing portions of a pair of adjacent raceways; b. provided with a respective groove for guiding the balls of each of its pair of raceways; and c. provided with a transversely extending central portion of increased thickness.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |