Patent US3575467A successfully refreshed from Google Patents.
US3575467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter bit and block
Assignee: ILLINOIS WATER TREATMENT COMPANY A DE CORP
•
Filing: 1969-03-11
•
Granted: 1971-04-20
•
Expires: 1989-03-11
Abstract
Abstract Cutting apparatus for use in underground mining industry including a cutting tool holder and a cutting tool containing a carbide cutting insert where the cutting tool includes a head portion and a shank portion disposed substantially perpendicularly to the head portion, the cutting tool shank being received in a bore in the cutting tool holder disposed at an acute angle to the cutting insert and in which cutting apparatus the forces resulting from the cutting action are communicated substantially axially to the cutting tool holder.
Inventors
- 👤 Charles S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/183
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
Cutting apparatus for use in mining operations comprising a cutting tool holder having a base portion and a bore running through said holder, the axis of said bore forming an acute angle with the plane of said base, said holder having a support face disposed substantially perpendicular to said bore and into which face said bore opens; a cutting tool having a head portion adapted to contain cutting means, a shank portion adjoining said head and adapted to be received in said bore, said head having a shoulder extending outwardly on at least two opposite sides of said shank adapted to bear on said face, cutting means disposed in said tool having a cutting edge lying in a plane forming an acute angle with the juncture of said face and said shoulder, said shoulder and said face further disposed at an angle of between 40* and 70* to the action of the forces of cutting generated at said cutting edge, said face and shoulder thereby cooperating to transmit substantially all of the forces generated in the cutting tool to said holder so as to relieve the shank of bending stresses within said bore.
Claim 2
Dependent Claim
193 words
Cutting apparatus for use in mining operations comprising a cutting tool holder having a base portion and a bore running through said holder, the axis of said bore forming an acute angle with the plane of said base, said holder having a support face disposed substantially perpendicular to said bore and into which face said bore opens; a cutting tool having a head portion adapted to contain cutting means, a shank portion adjoining said head and adapted to be received in said bore, said head having a shoulder extending outwardly on at least two opposite sides of said shank adapted to bear on said face, cutting means disposed in said tool having a cutting edge lying in a plane forming an acute angle with the juncture of said face and said shoulder, said shoulder and said face further disposed at an angle of between 40* and 70* to the action of the forces of cutting generated at said cutting edge, said face and shoulder thereby cooperating to transmit substantially all of the forces generated in the cutting tool to said holder so as to relieve the shank of bending stresses within said bore.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1 wherein the cutting tool included a cutting insert, the cutting edge of which lies on a plane forming an angle of between 0* and 10* with the perpendicular to the direction of advance of said tool.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 2 wherein said bore is rectangular in cross section and said shank is adapted to be closely received in said bore.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 3 wherein said face is slotted to closely receive said shoulder whereby said cutting tool is keyed to said holder.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 4 including means to retain said tool in said holder.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |