Patent US3915517A successfully refreshed from Google Patents.
US3915517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slack adjusting bushing
Assignee: Lee Raymond Organization Inc
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Filing: 1974-01-15
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Granted: 1975-10-28
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Expires: 1994-01-15
Abstract
Abstract An adjustable bushing with provision to control the degree of fit between the rotating shaft and the bushing, including provisions to take up slackness caused by wear. The bushing member is in the form of a helical spring mounted in a tapered housing, said bushing member being keyed to prevent rotation in the external hole in which it lies. An adjustable tapered compression member applies radial pressure to the bushing in the tapered housing, with an increase in such pressure acting to both proportionately reduce the length of the bushing assembly and to reduce the inner diameter of the bushing.
Inventors
- 👤 Anthony E Orefice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
F; F16; F16C; F16C25/00; F16C25/02; F16C33/00; F16C33/02; F16C33/04; F16C33/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
229 words
An adjustable bushing with provision to vary the minor diameter of the bearing member of the bushing by varying the length of said bearing member so as to provide a cylindrical bearing surface of optimum diameter with relation to a rotatable shaft mountable in the bore of the bearing member comprising a housing member fitted with a tapered bore, a compression gland which is adjustably engaged with said housing member to form a fixed bearing member section, said gland fitted with a similar tapered bore, with the diameter of both bores decreasing from the mid-section of the joined bores, a helical spring, that serves as the bearing member of the device, which is complementarily tapered to fit in the tapered bores of the housing member and the compression gland, said spring shaped, with the internal walls of the turns of the spring lying adjacent to the external surface of a shaft in rotatable engagement with said internal spring walls, and with the opposed external walls of the turns of the spring lying adjacent to the tapered bore walls of the housing member and the gland member in which the spring is installed, together with means to adjust the spacing along the axis of the device between the housing member and the compression gland so as to vary the length and consequently the internal diameter of the helical spring member.
Claim 2
Dependent Claim
229 words
An adjustable bushing with provision to vary the minor diameter of the bearing member of the bushing by varying the length of said bearing member so as to provide a cylindrical bearing surface of optimum diameter with relation to a rotatable shaft mountable in the bore of the bearing member comprising a housing member fitted with a tapered bore, a compression gland which is adjustably engaged with said housing member to form a fixed bearing member section, said gland fitted with a similar tapered bore, with the diameter of both bores decreasing from the mid-section of the joined bores, a helical spring, that serves as the bearing member of the device, which is complementarily tapered to fit in the tapered bores of the housing member and the compression gland, said spring shaped, with the internal walls of the turns of the spring lying adjacent to the external surface of a shaft in rotatable engagement with said internal spring walls, and with the opposed external walls of the turns of the spring lying adjacent to the tapered bore walls of the housing member and the gland member in which the spring is installed, together with means to adjust the spacing along the axis of the device between the housing member and the compression gland so as to vary the length and consequently the internal diameter of the helical spring member.
Claim 3
Dependent Claim
47 words
The combination as recited in claim 1 in which one winding of said helical spring is keyed to a fixed bearing member section so as to prevent rotation of the helical spring as a unit inside of the joined tapered bores of the fixed bEaring member section.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |