US3848931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool bit for vibration attenuation
Assignee: INT TOOL SALES
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Filing: 1972-10-10
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Granted: 1974-11-19
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Expires: 1992-10-10
Abstract
Abstract The vibrational characteristics of a percussion tool bit are varied by affixing a restraining collar thereto in accordance with the level of dampening desired. This collar is permanently affixed to the tool bit by incorporating a rigid interlock therebetween and a special compressible material is utilized therein to withstand high operating temperatures. Where the tool bit includes a detachable work tip, the tip is configured to serve as a protective shield for the collar upon penetration into materials. As part of this configuration, a conical surface is provided to facilitate withdrawal of the tool bit from penetrated materials and to avoid inadvertent removal of the tip during penetration.
Inventors
- 👤 J Swisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:59
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; B; B25; B25D; B25D17/00; B25D17/02; B25D17/04; B25D17/046; Y; Y10; Y10S; Y10S173/00; Y10S173/02; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17094; Y10T279/17102
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A percussion tool bit for attenuating operational vibrations, comprising: a shank through which forces are translated, said shank having a groove disposed therein; a compressible sleeve disposed about a portion of said shank and in intimate contact therewith; a rigid sleeve disposed to compressibly encase said compressible sleeve, said rigid sleeve being configured for engagement into said groove on said shank to interlock therewith; and a work tip detachably affixed to one end of said shank.
Claim 2
Dependent Claim
76 words
A percussion tool bit for attenuating operational vibrations, comprising: a shank through which forces are translated, said shank having a groove disposed therein; a compressible sleeve disposed about a portion of said shank and in intimate contact therewith; a rigid sleeve disposed to compressibly encase said compressible sleeve, said rigid sleeve being configured for engagement into said groove on said shank to interlock therewith; and a work tip detachably affixed to one end of said shank.
Claim 3
Dependent Claim
19 words
The tool bit of claim 1 wherein said compressible sleeve is fabricated of a ferrous oxide silicon base material.
Claim 4
Dependent Claim
48 words
The tool bit of claim 1 wherein said work tip is configured to perform penetrating operations and includes a boring diameter of greater magnitude than the outer diameter of said rigid sleeve, said boring diameter being effective to create a clearance channel for said rigid sleeve during penetration.
Claim 5
Dependent Claim
49 words
The tool bit of claim 1 wherein said work tip is configured to perform penetrating operations and includes a conical surface, said conical surface being oriented to present a decreasing taper in the direction of said rigid sleeve to reduce hang up of said work tip in penetrated materials.
Claim 6
Dependent Claim
83 words
The tool bit of claim 1 wherein sAid work tip is configured to perform penetrating operations and includes a conical surface and a boring diameter, said boring diameter being of greater magnitude than the outer diameter of said rigid sleeve to create a clearance channel for said rigid sleeve during penetration, said conical surface being oriented to present a decreasing taper from said boring diameter in the direction of said rigid sleeve to reduce hang up of said work tip in penetrated materials.
Claim 7
Dependent Claim
19 words
The tool bit of claim 5 wherein said compressible sleeve is fabricated of a ferrous oxide silicon base material.
Claim 8
Dependent Claim
41 words
The tool bit of claim 5 wherein said rigid sleeve is disposed immediately adjacent said work tip on said shank and said conical surface tapers to a minimum periphery of no greater diameter than the outer diameter of said rigid sleeve.
Claim 9
Dependent Claim
66 words
A vibration dampening collar for a percussion tool bit, comprising: a compressible sleeve configured to fit about a portion of the tool bit in intimate contact therewith; and a rigid sleeve disposed to encase said compressible sleeve, said rigid sleeve being configured to compress said compressible sleeve on the tool bit and having an interlocking portion thereon for engagement into a groove on the tool bit.
Claim 10
Dependent Claim
66 words
A vibration dampening collar for a percussion tool bit, comprising: a compressible sleeve configured to fit about a portion of the tool bit in intimate contact therewith; and a rigid sleeve disposed to encase said compressible sleeve, said rigid sleeve being configured to compress said compressible sleeve on the tool bit and having an interlocking portion thereon for engagement into a groove on the tool bit.
Claim 11
Dependent Claim
20 words
The vibration dampening collar of claim 8 wherein said compressible sleeve is fabricated of a ferrous oxide silicon base material.
Claim 12
Dependent Claim
94 words
A percussion tool bit for attenuating operational vibrations, comprising: a shank through which forces are translated; a compressible sleeve disposed about a portion of said shank and in intimate contact therewith; a rigid sleeve disposed to compressibly encase said compressible sleeve; and a work tip detachably affixed to one end of said shank, said work tip being configured to perform penetrating operations and including a boring diameter of greater magnitude than the outer diameter of said rigid sleeve, said boring diameter being effective to create a clearance channel for said rigid sleeve during penetration.
Claim 13
Dependent Claim
94 words
A percussion tool bit for attenuating operational vibrations, comprising: a shank through which forces are translated; a compressible sleeve disposed about a portion of said shank and in intimate contact therewith; a rigid sleeve disposed to compressibly encase said compressible sleeve; and a work tip detachably affixed to one end of said shank, said work tip being configured to perform penetrating operations and including a boring diameter of greater magnitude than the outer diameter of said rigid sleeve, said boring diameter being effective to create a clearance channel for said rigid sleeve during penetration.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |