US4477096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Socket retainer
Assignee: Chicago Pneumatic Tool Co LLC
•
Filing: 1982-08-02
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Granted: 1984-10-16
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Expires: 2002-08-02
Abstract
Abstract An elastic ring for maintaining a pin in a hole formed in a socket and work drive shaft of a rotary tool. The ring has integral fingers which project into the ends of the hole so that the pin cannot dislodge the ring by centrifugal force when the tool is operating at high speed. Several variations of the ring include weighted areas at portions of the ring midway between the fingers, which areas counterbalance centrifugal force on the ring to supplement holding force of the fingers upon the pin.
Inventors
- 👤 William K. Wallace
- 👤 David A. Giardino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:43
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/0007; B25B23/0035; B25G; B25G3/00; B25G3/02; B25G3/12; B25G3/26; F; F16; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17846; Y10T279/17923; Y10T279/24; Y10T279/243; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
An elastic ring of a substantially homogenous material for use in maintaining a pin in a hole formed in a socket and a work drive shaft of a rotary tool which ring is toroidal in shape and is formed with diametrically disposed integral fingers projecting inwardly from the inner surface of the ring, said fingers being arranged to enter the ends of said hole and wherein the regions circumferentially spaced 90° from the fingers are of greater cross sectional area than any other cross sectional areas of the ring so that upon rotation of the rotary tool said fingers are driven radially inwardly.
Claim 2
Dependent Claim
103 words
An elastic ring of a substantially homogenous material for use in maintaining a pin in a hole formed in a socket and a work drive shaft of a rotary tool which ring is toroidal in shape and is formed with diametrically disposed integral fingers projecting inwardly from the inner surface of the ring, said fingers being arranged to enter the ends of said hole and wherein the regions circumferentially spaced 90° from the fingers are of greater cross sectional area than any other cross sectional areas of the ring so that upon rotation of the rotary tool said fingers are driven radially inwardly.
Claim 3
Dependent Claim
26 words
An elastic ring in accordance with claim 1, wherein the diameter of the fingers is substantially the same as the cross sectional diameter of the ring.
Claim 4
Dependent Claim
27 words
An elastic ring in accordance with claim 1, wherein said regions are formed by progressively increasing radii which are at a maximum at 90° from the fingers.
Claim 5
Dependent Claim
24 words
An elastic ring in accordance with claim 1, wherein said regions are relatively short and are concentrated about a point 90° from the fingers.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |