Patent US3685772A successfully refreshed from Google Patents.
US3685772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient bush
Assignee: SKF Industrie SpA
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Filing: 1970-07-23
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Granted: 1972-08-22
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Expires: 1990-07-23
Abstract
Abstract A resilient bush formed from a rubber block with internal and external metal sleeves. The rubber block is placed between the sleeves under compression. In its uncompressed state the block is generally cylindrical with an annular groove on each end face and an annular groove round the mid-point of the cylindrical surface of the block: this groove has a varying cross section so that the bush presents a resilience which is dependent on the direction the load acts.
Inventors
- 👤 Giuseppe Giaccone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:47
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/38; F16F1/387
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A variable force resilient joint comprising: a. a cylindrical rubbEr body formed with a pair of opposed, Vshaped circular grooves in its end faces and with a single, centrally located, trapeze-shaped circumferential groove flaring radially outwardly; b. a pair of concentrical rigid sleeves internal and external to said body, between which the latter is pre-compressed in the radial direction; c. the outer sleeve having a radially inwardly directed flange at each end thereof in axial abutment contact with its adjacent end face of the body along an annular region situated radially beyond the groove in said adjacent end face; d. the width of the mouth of the trapeze-shaped groove being substantially constant along the length of the groove, and e. the depth of the trapeze-shaped groove and the width of the bottom surface of the latter being variable along the length of the groove in a manner wherein said depth increases as said width decreases and vice versa.
Claim 2
Dependent Claim
158 words
A variable force resilient joint comprising: a. a cylindrical rubbEr body formed with a pair of opposed, Vshaped circular grooves in its end faces and with a single, centrally located, trapeze-shaped circumferential groove flaring radially outwardly; b. a pair of concentrical rigid sleeves internal and external to said body, between which the latter is pre-compressed in the radial direction; c. the outer sleeve having a radially inwardly directed flange at each end thereof in axial abutment contact with its adjacent end face of the body along an annular region situated radially beyond the groove in said adjacent end face; d. the width of the mouth of the trapeze-shaped groove being substantially constant along the length of the groove, and e. the depth of the trapeze-shaped groove and the width of the bottom surface of the latter being variable along the length of the groove in a manner wherein said depth increases as said width decreases and vice versa.
Claim 3
Dependent Claim
30 words
The resilient bush of claim 1, wherein the bottom of said centrally located groove consists of two equal, axially opposed cylindrical surfaces joined by two equal, axially opposed plane surfaces.
Claim 4
Dependent Claim
44 words
The resilient bush of claim 2, wherein said cylindrical parts of said bottom of said groove have a radius greater than that of said cylindrical surface of said bush, and an axis parallel to that of said cylindrical surface but not coincident with it.
Claim 5
Dependent Claim
38 words
The resilient bush as of claim 2, in which said cylindrical parts of said bottom of said groove connect to the inclined walls of said groove along lines having a circular course when viewed in an axial direction.
References Cited (Backward Citations)
US2096139A
Cited
GB564215A
Cited
GB664231A
Cited
US2658710A
Cited
GB1066745A
Cited
US3455525A
Cited
US3532319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |