US3798725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool
Assignee: Individual
•
Filing: 1970-04-20
•
Granted: 1974-03-26
•
Expires: 1990-04-20
Abstract
Abstract A cutting tool which is particularly useful as a cut-off tool includes a tool holder and a replaceable cutting insert. The tool holder comprises a tool body having a passage for a drawbar which holds the insert in a cutting position on the body. The drawbar and the tool body have co-operating inclined surfaces for urging the drawbar into engagement with the insert on movement of the drawbar along the passage. The drawbar is held in a securing position by securing means.
Inventors
- 👤 T Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0466; B23B29/00; B23B29/04; B23B29/043; Y; Y10; Y10T; Y10T407/00; Y10T407/14; Y10T407/22; Y10T407/2272; Y10T407/2282; Y10T407/2284; Y10T407/25; Y10T82/00; Y10T82/25; Y10T82/2585
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
A cutting tool holder and replaceable cutting insert combination, the cutting tool holder comprising; a tool body, the body defining a pocket having within it a cross sectionally contoured interfitting insert seating surface adapted for seating a correspondingly contoured cutting insert, and having oppositely situated to, and aligned with, said seating surface a cross sectionally contoured interfitting abutment surface, said abutment surface being inclined with respect to said insert seating surface; the said combination further comprising a wedge adapted to secure a cutting insert upon said seating surface within said pocket, said wedge being cross sectionally contoured interfittingly on both sides of its engagement surfaces, one wedge surface being engageable with said abutment surface and the opposite wedge surface being engageable with a correspondingly contoured clamping surface which is formed upon said cutting insert; the said combination further comprising a fluid coolant duct which is formed within said tool body, said coolant duct having inlet openings arranged to co-operate with a coolant supply bore formed in a tool support block, said duct terminating in an outlet located adjacently the projecting face of the cutting insert and being arranged in such manner that a stream of coolant may be positively applied to the underside of the projected cutting edge of the insert.
Claim 2
Dependent Claim
211 words
A cutting tool holder and replaceable cutting insert combination, the cutting tool holder comprising; a tool body, the body defining a pocket having within it a cross sectionally contoured interfitting insert seating surface adapted for seating a correspondingly contoured cutting insert, and having oppositely situated to, and aligned with, said seating surface a cross sectionally contoured interfitting abutment surface, said abutment surface being inclined with respect to said insert seating surface; the said combination further comprising a wedge adapted to secure a cutting insert upon said seating surface within said pocket, said wedge being cross sectionally contoured interfittingly on both sides of its engagement surfaces, one wedge surface being engageable with said abutment surface and the opposite wedge surface being engageable with a correspondingly contoured clamping surface which is formed upon said cutting insert; the said combination further comprising a fluid coolant duct which is formed within said tool body, said coolant duct having inlet openings arranged to co-operate with a coolant supply bore formed in a tool support block, said duct terminating in an outlet located adjacently the projecting face of the cutting insert and being arranged in such manner that a stream of coolant may be positively applied to the underside of the projected cutting edge of the insert.
Claim 3
Dependent Claim
19 words
A cutting insert according to claim 1 having both its seating surface and its clamping surface cross-sectionally vee formed.
Claim 4
Dependent Claim
37 words
A combination according to claim 1 wherein the wedge means and the insert are formed with a cross sectionally contoured key and keyway which co-operate together in said cutting position to locate the insert on said body.
Claim 5
Dependent Claim
22 words
A combination according to claim 3 wherein the insert and the tool holder are formed with a square sectioned key and keyway.
Claim 6
Dependent Claim
74 words
A combination according to claim 1 wherein the tool body has formed within it a duct for fluid coolant, said duct having an inlet opening corresponding with a coolant supply bore formed within the tool holder block, and terminating in an outlet jet situated immediately adjacent to the cutting end of the insert so that a coolant stream may be forcibly led to a position very close to the underside of insert''s cutting edge.
Claim 7
Dependent Claim
85 words
A combination according to claim 1 wherein the tool body is of laminated construction comprising two plates; one of which is plain faced and the other having formed within it an opensided duct for coolant and having also formed within it throughout its length a passage through which a wedge operating drawbar may pass, said plates being joined together in face to face relationship in such manner as to cover said opensided passages and to form one cutting tool body in conformity with claim 1.
Claim 8
Dependent Claim
24 words
A combination according to claim 6 wherein the coolant passage and drawbar passage extends in the plane of the plates and between the plates.
Claim 9
Dependent Claim
24 words
A combination according to claim 7 wherein the tool body is formed of three plates, the central plates having cut-out portions constituting said passages.
Claim 10
Dependent Claim
52 words
A combination according to claim 1 wherein the tool body is of cylindrical form and is of laminated construcion, and wherein the contoured interfitting shapes are Vee-formed in accordance with claim 1 and is thereby adapted to hold a correspondingly formed cutting insert for use in trepanning or in face grooving operations.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |