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Patent US4086984A successfully refreshed from Google Patents.
US4086984A
Expired / Lapsed
US
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Vibration damper for impact tool
Assignee: Atlas Copco AB
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Filing: 1976-09-22
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Granted: 1978-05-02
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Expires: 1996-09-22
Abstract
Abstract A vibration damper for an impact tool comprises an envelope which surrounds a working part of the tool and thereby encloses a liquid-like material having damping properties.
Inventors
- 👤 Folke Ingvar Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:30
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
In an impact tool comprising an elongated working part (10; 20; 30) which includes a shank portion (11; 21; 31) for connection to an impact machine, a working end (12; 22; 32) and a collar (18; 28; 38) intermediate said shank portion and working end, said impact tool transmitting impact energy in its axial direction, a vibration damper for damping lateral vibrations in said impact tool, comprising: an envelope (13; 23; 33) surrounding a portion of the working part of the tool intermediate said collar and working end; and a liquid-like material (16; 26; 36) enclosed within said envelope for damping lateral vibrations of said working part.
Claim 2
Dependent Claim
107 words
In an impact tool comprising an elongated working part (10; 20; 30) which includes a shank portion (11; 21; 31) for connection to an impact machine, a working end (12; 22; 32) and a collar (18; 28; 38) intermediate said shank portion and working end, said impact tool transmitting impact energy in its axial direction, a vibration damper for damping lateral vibrations in said impact tool, comprising: an envelope (13; 23; 33) surrounding a portion of the working part of the tool intermediate said collar and working end; and a liquid-like material (16; 26; 36) enclosed within said envelope for damping lateral vibrations of said working part.
Claim 3
Dependent Claim
14 words
A vibration damper according to claim 1, wherein said envelope is an elastomeric envelope.
Claim 4
Dependent Claim
15 words
A vibration damper according to claim 1, wherein said envelope comprises a single-walled sleeve (13).
Claim 5
Dependent Claim
24 words
A vibration damper according to claim 3, comprising clamping means (15) for clamping the ends of said sleeve (13) to said working part (10).
Claim 6
Dependent Claim
14 words
A vibration damper according to claim 3, wherein said sleeve is an elastomeric sleeve.
Claim 7
Dependent Claim
30 words
A vibration damper according to claim 1, wherein said envelope comprises a double-walled sleeve (23, 27), and said liquid-like material (26) is situated between the two walls of the sleeve.
Claim 8
Dependent Claim
25 words
A vibration damper according to claim 4, comprising clamping means (35) for clamping the ends of said sleeve (23, 27) to said working part (20).
Claim 9
Dependent Claim
14 words
A vibration damper according to claim 6, wherein said sleeve is an elastomeric sleeve.
Claim 10
Dependent Claim
22 words
A vibration damper according to claim 1, wherein said vibration damper surrounds said working part along a shorter part of its length.
Claim 11
Dependent Claim
24 words
A vibration damper according to claim 1, wherein said liquid-like material (16; 26; 36) comprises a liquid which hardens when in contact with oxygen.
Claim 12
Dependent Claim
25 words
A vibration damper according to claim 1, wherein said liquid-like material (16; 26; 36) comprises a liquid which hardens when in contact with humid air.
Claim 13
Dependent Claim
15 words
A vibration damper according to claim 1, wherein said collar is a detachable collar (38).
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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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |