US3811520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for drilling holes and cutting slots
Assignee: Individual
•
Filing: 1972-04-24
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Granted: 1974-05-21
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Expires: 1992-04-24
Abstract
Abstract A tool is, disclosed wherein provision is made for a shank and a cutting portion of which the latter is made of an abrasivecontaining material. A stem is positioned in the side of the cutting portion along the tool generant which is made of a material less resistant to abrading and having a higher bending strength than the material of the cutting portion, the profile of the stem being identical to the profile of a longitudinal slot in the end surface of the cutting portion.
Inventors
- 👤 E Prudnikov
- 👤 N Ganelin
- 👤 G Skripko
- 👤 G Golub
- 👤 S Frenkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; B24; B24D; B24D7/00; B24D7/02; B28D1/14; E; E21; E21B; E21B10/00; E21B10/02; E21B10/04; E21B10/46; E21B10/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
A tool for drilling holes and cutting slots, said tool comprising: a shank for mounting the tool in a holder; a cutting portion connected to said shank which is made of an abrasivecontaining material; a stem positioned in the side of said cutting portion along the tool generant connected to said portion, said stem being made of a material which is less resistant to abrading and having a higher bending strength than the material of the cutting portion; said stem having a longitudinal slot therein with the stem profile being identical to the profile of said longitudinal slot; and wherein said longitudinal slot is so arranged that abrasive particles on the end surface of said cutting portion are positioned at a certain distance from the axis of rotation of the tool in order to impart a required cutting speed To said particles, and wherein the bottom of said slot has a convex curvilinear surface which is instrumental in shearing off or abrading a core being formed during the process of drilling.
Claim 2
Dependent Claim
171 words
A tool for drilling holes and cutting slots, said tool comprising: a shank for mounting the tool in a holder; a cutting portion connected to said shank which is made of an abrasivecontaining material; a stem positioned in the side of said cutting portion along the tool generant connected to said portion, said stem being made of a material which is less resistant to abrading and having a higher bending strength than the material of the cutting portion; said stem having a longitudinal slot therein with the stem profile being identical to the profile of said longitudinal slot; and wherein said longitudinal slot is so arranged that abrasive particles on the end surface of said cutting portion are positioned at a certain distance from the axis of rotation of the tool in order to impart a required cutting speed To said particles, and wherein the bottom of said slot has a convex curvilinear surface which is instrumental in shearing off or abrading a core being formed during the process of drilling.
Claim 3
Dependent Claim
18 words
A tool as claimed in claim 1, wherein said stem is made an integral part of the shank.
Claim 4
Dependent Claim
47 words
A tool as claimed in claim 1, wherein the end face of said stem on the side of the longitudinal slot does not protrude beyond said end surface of the cutting portion and is located at a given distance from said end surface of the cutting portion.
References Cited (Backward Citations)
SU246284A1
Cited
US2088197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |