Patent US1512002A successfully refreshed from Google Patents.
Patent US3942838A successfully refreshed from Google Patents.
US3942838A
Expired / Lapsed
US
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Bit coupling means
Assignee: Cannon Industries Inc
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Filing: 1974-05-31
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Granted: 1976-03-09
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Expires: 1994-05-31
Abstract
Abstract A rock hammer and more particularly a rock hammer having thereon improved means for securing a cutting or breaking bit assembly thereto.
Inventors
- 👤 Edward A. Bailey
- 👤 Rene Pertusio
- 👤 George A. Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:35
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/043; E21C; E21C35/00; E21C35/18; E21C35/183; E21C35/1831; E21C35/19; E21C35/193; E21C35/1933; F; F16; F16B; F16B2200/00; F16B2200/69; F16B2200/73
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
In a coupling assembly for coupling a working member in coaxial alignment with an elongated force transmitting member, the improvement comprising: rigid means adapted to receive portions of said members within respective axial end portions thereof and cooperable with respective adjacent peripheral surfaces of said members to maintain said coaxial alignment; locking means having an internal portion thereof cooperable with an adjacent external portion of said force transmitting member to provide a selectively adjustable circumferential alignment therebetween; and securing means cooperable with portions of said rigid means and said locking means to positively maintain said selectively adjustable circumferential alignment and to maintain a circumferential alignment between said rigid means and said locking means.
Claim 2
Dependent Claim
113 words
In a coupling assembly for coupling a working member in coaxial alignment with an elongated force transmitting member, the improvement comprising: rigid means adapted to receive portions of said members within respective axial end portions thereof and cooperable with respective adjacent peripheral surfaces of said members to maintain said coaxial alignment; locking means having an internal portion thereof cooperable with an adjacent external portion of said force transmitting member to provide a selectively adjustable circumferential alignment therebetween; and securing means cooperable with portions of said rigid means and said locking means to positively maintain said selectively adjustable circumferential alignment and to maintain a circumferential alignment between said rigid means and said locking means.
Claim 3
Dependent Claim
28 words
A coupling assembly as specified in claim 1 wherein said rigid means threadably receives said portion of said force transmitting member within said respective axial end portion thereof.
Claim 4
Dependent Claim
24 words
A coupling assembly as specified in claim 1 wherein said working member is a bit and said force transmitting member is a striking bar.
Claim 5
Dependent Claim
35 words
A coupling assembly as specified in claim 1 wherein said internal portion of said locking means and said external portion of said force transmitting member are cooperably splined to maintain said selectively adjustable circumferential alignment.
Claim 6
Dependent Claim
28 words
A coupling assembly as specified in claim 4 wherein said rigid means threadably receives said portion of said force transmitting member within said respective axial end portion thereof.
Claim 7
Dependent Claim
28 words
A coupling assembly as specified in claim 5 wherein said external portion of said force transmitting member is located intermediate the longitudinal ends of said force transmitting member.
Claim 8
Dependent Claim
22 words
A coupling assembly as specified in claim 4 wherein said locking means is an annular locking ring surrounding said force transmitting member.
Claim 9
Dependent Claim
40 words
A coupling assembly as specified in claim 7 wherein said securing means includes a plurality of circumferentially spaced members extending between said rigid and locking means in a direction generally parallel to the longitudinal axis of said force transmitting member.
Claim 10
Dependent Claim
26 words
A coupling assembly as specified in claim 8 wherein the number of said circumferentially spaced members is an odd multiple of the number of said splines.
Claim 11
Dependent Claim
30 words
A coupling assembly as specified in claim 7 wherein said securing means includes an annular snap ring cooperable with interengaging tongue and groove portions of said rigid and locking means.
Claim 12
Dependent Claim
27 words
A coupling assembly as specified in claim 10 wherein the number of said tongue and groove portions is an odd multiple of the number of said splines.
References Cited (Backward Citations)
US2049289A
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US2318590A
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US2672358A
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US3258284A
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US3544166A
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US3709306A
Cited
US3806265A
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |