US3752515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient keeper ring
Assignee: Kennametal Inc
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Filing: 1971-09-15
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Granted: 1973-08-14
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Expires: 1991-09-15
Abstract
Abstract The specification discloses a resilient keeper ring, especially for mounting in the grooved shank of a rotatable tool for retaining the tool in a support block therefor in which the resilient ring is in the form of a split band with the ends of the band in overlapping relation so that the bands can be handled in an automatic feeding device without becoming interlocked with each other.
Inventors
- 👤 S Oaks
- 👤 E Claar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:32
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/197; F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/18; F16B21/183
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A resilient ring for use as a captive keeper on the shank of a tool for retaining the tool in assembled relation with a support block therefor comprising a band of thin resilient metal of uniform thickness formed to a substantially cylindrical configuration and concave toward the center in axial cross section, said ring being split axially from end to end so as to be radially expansible and contractable, the opposed circumferential ends of said ring on opposite sides of the split in the ring overlapping in the circumferential direction whereby a plurality of the rings in bulk condition are prevented from becoming hooked together, said ring between the axial ends thereof protruding radially outwardly further than the said axial ends.
Claim 2
Dependent Claim
121 words
A resilient ring for use as a captive keeper on the shank of a tool for retaining the tool in assembled relation with a support block therefor comprising a band of thin resilient metal of uniform thickness formed to a substantially cylindrical configuration and concave toward the center in axial cross section, said ring being split axially from end to end so as to be radially expansible and contractable, the opposed circumferential ends of said ring on opposite sides of the split in the ring overlapping in the circumferential direction whereby a plurality of the rings in bulk condition are prevented from becoming hooked together, said ring between the axial ends thereof protruding radially outwardly further than the said axial ends.
Claim 3
Dependent Claim
99 words
A resilient ring according to claim 1 in which each of the opposed circumferential ends of the ring is formed with at least two axially and circumferentially spaced axial end regions which face in the circumferential direction and at least one circumferential region which faces in the axial direction and extending between said axial regions, the circumferential regions of said opposed circumferential ends facing in respectively opposite axial directions and being in slidable engagement with each other while the said axial regions of said opposed circumferential ends are disposed in circumferentially spaced relation in relaxed condition of said ring.
Claim 4
Dependent Claim
31 words
A resilient ring according to claim 1 in which said ring comprises rounded protrusions projecting radially outwardly therefrom in circumferentially spaced relation in about the axially central region of the ring.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |