Patent US4411551A successfully refreshed from Google Patents.
US4411551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for providing a friction joint
Assignee: SKF AB
•
Filing: 1981-03-12
•
Granted: 1983-10-25
•
Expires: 2001-03-12
Abstract
Abstract The invention concerns a device for providing a friction joint. It comprises an inner (1,11) and an outer (2,9) element, the inner element having a tapered outer surface co-operating with a complementary tapered inner surface in a bore in the outer element. Means (6,7,8,12) are provided for displacing the elements axially parallel to the taper axes. One element preferably consists of a slitted clamping sleeve, and for diminishing the friction in the tapered contact and simplifying manufacturing of the parts of the device, one of the tapered surfaces is provided with a friction reducing material and one of the tapered surfaces has a groove (3,4,5,13,14,15,16) extending around the circumference.
Inventors
- 👤 Kurt Adelbratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:36
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/09; F16D1/093; F16D1/095; F16D1/096; F16D1/02; F16D1/04; F16D1/05; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7056; Y10T403/7062; Y10T403/7064; Y10T403/7066; Y10T403/7067; Y10T403/7069
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A coupling device for providing a friction joint comprising inner and outer elements, said inner element having a tapered outer surface for engagement with a complementary tapered inner surface formed in a bore in the outer element, means for axially displacing said elements in relation to each other parallel to the cone axes of the tapered surfaces for radially deforming at least one element, the tapered surface of one of said elements being continuous and the complementary tapered surface of the other element having at least one circumferential groove formed therein thereby providing only contact between the tapered surfaces at other than the groove location and thereby reducing the active contact surface area between said tapered surfaces, the tapered surface of one of said elements only being provided with a deformable friction reducing material which transfers to the initially uncovered tapered surface of the other element during axial displacement of said elements.
Claim 2
Dependent Claim
152 words
A coupling device for providing a friction joint comprising inner and outer elements, said inner element having a tapered outer surface for engagement with a complementary tapered inner surface formed in a bore in the outer element, means for axially displacing said elements in relation to each other parallel to the cone axes of the tapered surfaces for radially deforming at least one element, the tapered surface of one of said elements being continuous and the complementary tapered surface of the other element having at least one circumferential groove formed therein thereby providing only contact between the tapered surfaces at other than the groove location and thereby reducing the active contact surface area between said tapered surfaces, the tapered surface of one of said elements only being provided with a deformable friction reducing material which transfers to the initially uncovered tapered surface of the other element during axial displacement of said elements.
Claim 3
Dependent Claim
28 words
Device according to claim 1, characterized by that the inner element is a radially deformable sleeve intended for surrounding and being clamped against a shaft or the like.
Claim 4
Dependent Claim
20 words
Device according to claim 1, characterized by that one of the tapered surfaces has a number of co-axial annular recesses.
Claim 5
Dependent Claim
18 words
Device according to claim 1, characterized by that one of the co-operating tapered surfaces has a helical recess.
Claim 6
Dependent Claim
32 words
Device according to claim 1, characterized that the friction reducing material is provided on the tapered surface having at least one recess and on the portions which contact the other tapered surface.
Claim 7
Dependent Claim
14 words
Device according to claim 1, characterized by that the friction reducing material is polytetrafluoreothylene.
Claim 8
Dependent Claim
35 words
Device according to claim 1, characterized by that it is provided with a single screw (6.12) for axially displacing the elements in relation to each other parallel to the cone axes of the tapered surfaces.
References Cited (Backward Citations)
US2062290A
Cited
US2509711A
Cited
GB775053A
Cited
FR1255369A
Cited
GB1036492A
Cited
US3501183A
Cited
US3682505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |