US3618683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Button bit
Assignee: Ingersoll Rand Co
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Filing: 1968-12-16
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Granted: 1971-11-09
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Expires: 1988-12-16
Abstract
Abstract A percussive rock drill bit of a type generally known in the art as a button bit wherein a plurality of wear-resistant metal inserts project from the working face of the drill bit. An elastomeric sleeve surrounds that portion of the sides of the insert which is embedded in the bit body. There is metal to metal contact be between the end of the insert and the bit body for transmitting blow energy from the bit body to the insert.
Inventors
- 👤 Robert W Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:05
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A cutting implement for use with a rock drilling machine comprising: a bit body having a working face at one end; said working face having a plurality of openings therein; a wear-resistant insert mounted in each of said openings so that there is intimate contact between one end of said insert and the bottom of the opening within which it is mounted; and an elastomeric sleeve positioned only between the sides of said insert and said bit body.
Claim 2
Dependent Claim
78 words
A cutting implement for use with a rock drilling machine comprising: a bit body having a working face at one end; said working face having a plurality of openings therein; a wear-resistant insert mounted in each of said openings so that there is intimate contact between one end of said insert and the bottom of the opening within which it is mounted; and an elastomeric sleeve positioned only between the sides of said insert and said bit body.
Claim 3
Dependent Claim
15 words
The cutting implement of claim 1 wherein said elastomeric sleeve is bonded to said insert.
Claim 4
Dependent Claim
16 words
The cutting implement of claim 2 wherein said elastomeric sleeve is bonded to said bit body.
Claim 5
Dependent Claim
25 words
The cutting implement of claim 1 wherein said opening is a blind cylindrical bore having a diameter smaller than the free diameter of said sleeve.
Claim 6
Dependent Claim
14 words
The cutting implement of claim 4 wherein said sleeve is bonded to said insert.
Claim 7
Dependent Claim
74 words
A rock drill bit comprising: a bit body having a working face at one end; a plurality of button-type wear-resistant inserts each having one end and at least a portion of its sides mounted in said bit body and projecting outwardly from said working face, said one end directly contacting said body; and a resilient sleeve surrounding each of said inserts and positioned only between the sides of said insert and said bit body.
Claim 8
Dependent Claim
74 words
A rock drill bit comprising: a bit body having a working face at one end; a plurality of button-type wear-resistant inserts each having one end and at least a portion of its sides mounted in said bit body and projecting outwardly from said working face, said one end directly contacting said body; and a resilient sleeve surrounding each of said inserts and positioned only between the sides of said insert and said bit body.
Claim 9
Dependent Claim
16 words
The rock drill bit of claim 6 wherein said resilient sleeve is bonded to said insert.
Claim 10
Dependent Claim
49 words
The rock drill bit of claim 6 wherein the working face of said bit body is provided with a plurality of blind bores having a diameter smaller than the diameter of said resilient sleeve and each of said inserts and said sleeve are mounted in one of said bores.
Claim 11
Dependent Claim
15 words
The rock drill bit of claim 8 wherein said sleeve is bonded to said insert.
Claim 12
Dependent Claim
16 words
The rock drill bit of claim 9 wherein said sleeve is bonded to said bit body.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |