US3583498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact hammer
Assignee: CEG CORP
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Filing: 1970-02-13
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Granted: 1971-06-08
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Expires: 1990-02-13
Abstract
Abstract An impact hammer includes a ram mounted in a cylindrical housing for impact engagement with an anvil and tool supported by the housing. The ram is driven by compressed gas confined within a chamber defined at the inner end of the hammer housing. The ram is cocked to compress the gas by means of a cylindrical cam mounted on the ram and drivingly engaged by cam rollers rotatably mounted in the housing. The gas chamber is formed between the inserted end of the hammer ram and the closed end of the hammer jacket by a hat-shaped flexible diaphragm, the rim of which is secured to the jacket and the crown top of which is secured to the inserted end of the impact ram.
Inventors
- 👤 Russell John Dorm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:58
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/24; B25; B25D; B25D11/00; B25D11/06; B25D11/10; B25D11/102; B28; B28D; B28D1/00; B28D1/26; F; F01; F01B; F01B17/00; F01B17/02; B25D2211/00; B25D2211/06; B25D2211/062; B25D2211/065
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
In a compressible fluid powered impact hammer comprising a generally cylindrical jacket having a closed end, an impact ram reciprocally mounted in said jacket, tool engaging anvil means on the open end of said jacket for impact engagement by the outer end of said ram, the inner end of said ram defining a compressible fluid containing chamber with the closed end of said jacket, and means for cyclically driving said ram into said jacket to compress the fluid in said chamber and for releasing said ram for outward impact movement under the driving influence of compressed fluid, the combination therewith of a hat-shaped flexible diaphragm having a rim and a crown, means sealing the rim of said diaphragm to said jacket at a point spaced from the closed end thereof, and means sealing the crown top of said diaphragm to the inner inserted end of said ram, whereby said diaphragm provides an expandible and contractable seal between the ram and the jacket.
Claim 2
Dependent Claim
162 words
In a compressible fluid powered impact hammer comprising a generally cylindrical jacket having a closed end, an impact ram reciprocally mounted in said jacket, tool engaging anvil means on the open end of said jacket for impact engagement by the outer end of said ram, the inner end of said ram defining a compressible fluid containing chamber with the closed end of said jacket, and means for cyclically driving said ram into said jacket to compress the fluid in said chamber and for releasing said ram for outward impact movement under the driving influence of compressed fluid, the combination therewith of a hat-shaped flexible diaphragm having a rim and a crown, means sealing the rim of said diaphragm to said jacket at a point spaced from the closed end thereof, and means sealing the crown top of said diaphragm to the inner inserted end of said ram, whereby said diaphragm provides an expandible and contractable seal between the ram and the jacket.
Claim 3
Dependent Claim
29 words
A compressible fluid powered impact hammer as defined in claim 1 wherein said hat-shaped flexible diaphragm includes a generally annular crown top portion for sealing engagement with the ram.
References Cited (Backward Citations)
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US2317158A
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US3186498A
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |