US3677060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite tool
Assignee: Fagersta Bruks AB
•
Filing: 1970-06-24
•
Granted: 1972-07-18
•
Expires: 1990-06-24
Abstract
Abstract A composite working tool having a working surface and a desired direction of metal working and power transmitting movement comprising a composite composed of two bodies, each of a different metal; one of said metals being harder than the other and being the working surface. The two of said bodies are in direct contact with each other along a plane substantially perpendicular to said direction of movement whereby power is transmitted from one of said bodies to the other across said plane when said composite working tool is moved. One of said bodies has a narrowed portion and the other of said bodies has an opening defined therewithin to receive said narrowed portion. Each of said narrowed portion and said opening have defining walls in the desired direction of movement of the tool. The defined opening is larger in size than the narrowed portion to receive the same therein with clearance between said defining walls. Brazing filler metal is positioned in said clearance between said defining walls to bond the same together in the desired direction of movement of said tool. The working surface of said composite tool is preferably a hard metal carbide and the other metal of said tool is preferably a steel shank. The composite tool is preferably manufactured utilizing cooling of the steel shank when the hard solder is heated.
Inventors
- 👤 Kaj-Ragnar Loqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:31
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/01
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
182 words
A composite working tool having a working surface and an axial direction of metal working movement and of power transmission, said composite tool comprising a power transmitting body and a working body having said working surface, said working body being composed of hard metal carbide and being harder than said power transmitting body, said power transmitting body and said working body being in direct contact with each other along a plane substantially perpendicular to said axial direction whereby power is transmitted from one of said bodies to the other across said plane, one of said bodies having a narrowed portion and the other of said bodies having an opening defined therewithin to receive said narrowed portion, each of said narrowed portion and said opening having defining walls in the said axial direction, said defined opening being larger in size than said narrowed portion to receive the same therein with clearance between said defining walls, and brazing filler metal in said clearance and positioned between said defining walls to bond the same together in the said direction of power transmission of said tool.
Claim 2
Dependent Claim
182 words
A composite working tool having a working surface and an axial direction of metal working movement and of power transmission, said composite tool comprising a power transmitting body and a working body having said working surface, said working body being composed of hard metal carbide and being harder than said power transmitting body, said power transmitting body and said working body being in direct contact with each other along a plane substantially perpendicular to said axial direction whereby power is transmitted from one of said bodies to the other across said plane, one of said bodies having a narrowed portion and the other of said bodies having an opening defined therewithin to receive said narrowed portion, each of said narrowed portion and said opening having defining walls in the said axial direction, said defined opening being larger in size than said narrowed portion to receive the same therein with clearance between said defining walls, and brazing filler metal in said clearance and positioned between said defining walls to bond the same together in the said direction of power transmission of said tool.
Claim 3
Dependent Claim
33 words
The composite tool of claim 1 wherein said power transmitting body is a steel shank and wherein said body having said narrowed portion is male shaped and said other body is female shaped.
Claim 4
Dependent Claim
14 words
The composite tool of claim 2 wherein said working body has said narrowed portion.
Claim 5
Dependent Claim
25 words
The composition tool of claim 3 wherein the defining wall of said opening forms a collar which surrounds said male portion of said working body.
Claim 6
Dependent Claim
46 words
The composite tool of claim 4 wherein there is provided a second clearance between said bodies in the direction substantially normal to the direction of metal working movement and positioned at the end of said collar, and wherein brazing filler metal is in said second clearance.
Claim 7
Dependent Claim
19 words
The composite tool of claim 5 wherein said collar has a plurality of slots circumferentially spaced along said collar.
Claim 8
Dependent Claim
15 words
The composite tool of claim 6 wherein brazing filler metal is positioned in said slots.
Claim 9
Dependent Claim
198 words
A composite metal working tool having a desired direction of working movement and power transmission, said tool comprising a first body of steel, a second body of hard metal carbide, said two bodies having dissimilar heat expansion characteristics and hardness, said first body of steel and said second body of hard metal carbide being in direct contact with each other along a plane substantially perpendicular to said direction of working movement and power transmission, whereby power is transmitted from one of said bodies to the other across said plane when said composite tool is moved in said direction, one of said bodies having an elongated portion extending from the main portion of said body in the direction of the working movement of the tool, the other of said bodies having an elongated extension complementary to said first mentioned elongation and in the direction of working movement of said tool with a clearance defined between said complementary elongations said first mentioned elongation having a plurality of slots circumferentially spaced along the length of said eloNgation, and brazing filler metal in said slots and in said clearance bonding said complementary elongations together in the direction of movement of the tool.
Claim 10
Dependent Claim
198 words
A composite metal working tool having a desired direction of working movement and power transmission, said tool comprising a first body of steel, a second body of hard metal carbide, said two bodies having dissimilar heat expansion characteristics and hardness, said first body of steel and said second body of hard metal carbide being in direct contact with each other along a plane substantially perpendicular to said direction of working movement and power transmission, whereby power is transmitted from one of said bodies to the other across said plane when said composite tool is moved in said direction, one of said bodies having an elongated portion extending from the main portion of said body in the direction of the working movement of the tool, the other of said bodies having an elongated extension complementary to said first mentioned elongation and in the direction of working movement of said tool with a clearance defined between said complementary elongations said first mentioned elongation having a plurality of slots circumferentially spaced along the length of said eloNgation, and brazing filler metal in said slots and in said clearance bonding said complementary elongations together in the direction of movement of the tool.
Claim 11
Dependent Claim
36 words
The composite metal working tool of claim 8 wherein there is a second clearance between the end of said first mentioned elongation and said other body and wherein hard solder is positioned in said second clearance.
Claim 12
Dependent Claim
40 words
The composite metal working tool of claim 9 wherein said first mentioned elongation is a steel body shank, wherein said second mentioned elongation is a collar, and wherein said second body of hard metal carbide is a tool working surface.
Claim 13
Dependent Claim
225 words
A process for producing a composite tool having a working surface and an axial direction of metal working movement and of power transmission, said composite tool comprising a power transmitting body and a working body having said working surface, said working body being composed of hard metal carbide and being harder than said power transmitting body, said power transmitting body and said working body being in direct contact with each other along a plane substantially perpendicular to said axial direction whereby power is transmitted from one of said bodies to the other across said plane, one of said bodies having a narrowed portion and the other of said bodies having an opening defined therewithin to receive said narrowed portion, each of said narrowed portion and said opening having defining walls in the said axial direction, said defined opening being larger in size than said narrowed portion to receive the same therein with clearance between said defining walls, and brazing filler metal in said clearance and positioned between said defining walls to bond the same together in the said direction of power transmission of said tool comprising applying brazing filler metal in said clearance between the collar of the steel shank and said male portion of the hard metal carbide, and heating said brazing filler metal to substantially its melting point while cooling said steel shank.
Claim 14
Dependent Claim
225 words
A process for producing a composite tool having a working surface and an axial direction of metal working movement and of power transmission, said composite tool comprising a power transmitting body and a working body having said working surface, said working body being composed of hard metal carbide and being harder than said power transmitting body, said power transmitting body and said working body being in direct contact with each other along a plane substantially perpendicular to said axial direction whereby power is transmitted from one of said bodies to the other across said plane, one of said bodies having a narrowed portion and the other of said bodies having an opening defined therewithin to receive said narrowed portion, each of said narrowed portion and said opening having defining walls in the said axial direction, said defined opening being larger in size than said narrowed portion to receive the same therein with clearance between said defining walls, and brazing filler metal in said clearance and positioned between said defining walls to bond the same together in the said direction of power transmission of said tool comprising applying brazing filler metal in said clearance between the collar of the steel shank and said male portion of the hard metal carbide, and heating said brazing filler metal to substantially its melting point while cooling said steel shank.
Claim 15
Dependent Claim
20 words
The process of claim 11 wherein said steel shank is cooled by placing a cooling shoe in peripheral contact therewith.
References Cited (Backward Citations)
US1698034A
Cited
US2019934A
Cited
US2124438A
Cited
US2418338A
Cited
US2474643A
Cited
US3180023A
Cited
US3372464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |