Patent US4728228A successfully refreshed from Google Patents.
US4728228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Milling cutter
Assignee: Honda Motor Co Ltd
•
Filing: 1985-09-26
•
Granted: 1988-03-01
•
Expires: 2005-09-26
Abstract
Abstract A milling cutter has a cutter body including one or more steps extending along the outer peripheral edge of the cutter body. Cartridges are detachably mounted on the step, each of the cartridges having a plurality of equally spaced cutting edges. Preferably, the cutter body has a radially outer step and a radially inner step close thereto, and the cartridges with roughly cutting edges are mounted on the radially outer step. Roughly cutting edges and finishing cutting edges may be attached to the outer and inner surfaces of a single cartridge. When the cartridges are mounted on the step, the cutting edges are equally spaced fully around the cutter body for successive milling operation on a workpiece.
Inventors
- 👤 Hiromu Okunishi
- 👤 Shigenari Shino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:57
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2204; B23C5/2234; B23C5/202; B23C2200/00; B23C2200/36; B23C2200/367; B23C2220/00; B23C2220/60; B23C2220/605; B23C2226/00; B23C2226/12; B23C2226/125; B23C2226/31; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/191; Y10T407/1926; Y10T407/195
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
289 words
A milling cutter comprising: a cutter body having an outer peripheral edge and a plurality of circular steps defined concentrically along said outer peripheral edge, said steps including a radially inner step and a radially outer step, said radially inner step being higher than said radially outer step in the axial direction of said cutter body; a first plurality of cartridges disposed successively on said radially inner step by fastening means without substantial gaps therebetween, each of said first cartridges having a body portion and a cutting edge portion with at least two finishing cutting edges with first flutes, said first cutting edges of said cartridges being spaced at equal intervals fully around said cutter body, said cartridge body including leading and trailing surfaces slanted complementarily in the direction of rotation of said cutter body, said cartridges being arranged on said first step with said leading surfaces being pressed by said trailing end surfaces of adjacent said cartridges, said first flutes being in communication with each other for discharging cutting oil therethrough; and a second plurality of cartridges disposed successively on said radially outer step by fastening means without substantial gaps therebetween, each of said second cartridges having a body portion and a cutting edge portion with at least two roughly cutting edges with second flutes, said second cutting edges of said cartridges being spaced at equal intervals fully around said cutter body, said cartridge body including leading and trailing surfaces slanted complementarily in the direction of rotation of said cutter body, said cartridges being arranged on said second step with said leading surfaces being pressed by said trailing end surfaces of adjacent said cartridges, said second flutes being in communication with each other for discharging cutting oil therethrough.
Claim 2
Dependent Claim
289 words
A milling cutter comprising: a cutter body having an outer peripheral edge and a plurality of circular steps defined concentrically along said outer peripheral edge, said steps including a radially inner step and a radially outer step, said radially inner step being higher than said radially outer step in the axial direction of said cutter body; a first plurality of cartridges disposed successively on said radially inner step by fastening means without substantial gaps therebetween, each of said first cartridges having a body portion and a cutting edge portion with at least two finishing cutting edges with first flutes, said first cutting edges of said cartridges being spaced at equal intervals fully around said cutter body, said cartridge body including leading and trailing surfaces slanted complementarily in the direction of rotation of said cutter body, said cartridges being arranged on said first step with said leading surfaces being pressed by said trailing end surfaces of adjacent said cartridges, said first flutes being in communication with each other for discharging cutting oil therethrough; and a second plurality of cartridges disposed successively on said radially outer step by fastening means without substantial gaps therebetween, each of said second cartridges having a body portion and a cutting edge portion with at least two roughly cutting edges with second flutes, said second cutting edges of said cartridges being spaced at equal intervals fully around said cutter body, said cartridge body including leading and trailing surfaces slanted complementarily in the direction of rotation of said cutter body, said cartridges being arranged on said second step with said leading surfaces being pressed by said trailing end surfaces of adjacent said cartridges, said second flutes being in communication with each other for discharging cutting oil therethrough.
Claim 3
Dependent Claim
17 words
A milling cutter according to claim 1, wherein said cartridges are detachably mounted on said cutter body.
Claim 4
Dependent Claim
58 words
A milling cutter according to claim 2, wherein said cartridges have holes extending in the axial direction of said cutter body, said cutter body having holes aligned with said holes of the cartridges, said cartridges being fastened to said cutter body by bolts extending through said holes of the cartridges threaded into said holes of the cutter body.
Claim 5
Dependent Claim
58 words
A milling cutter according to claim 1, wherein said cartridges have holes extending in the axial direction of said cutter body, said cutter body having holes aligned with said holes of the cartridges, said cartridges being fastened to said cutter body by bolts extending through said holes of the cartridges threaded into said holes of the cutter body.
Claim 6
Dependent Claim
33 words
A milling cutter according to claim 1, wherein said cutter body includes an annular projection extending along and close to said outer peripheral edge thereof, said steps being defined on said annular projection.
Claim 7
Dependent Claim
27 words
A milling cutter according to claim 1, wherein said step has a plurality of equally spaced ridges, said cartridges having slots in which said ridges are fitted.
Claim 8
Dependent Claim
27 words
A milling cutter according to claim 1, wherein said cartridge body and said cutting edge portion are made of the same material and integral with each other.
Claim 9
Dependent Claim
31 words
A milling cutter according to claim 1, wherein said cartridge body and said cutting edge portion are separate from each other, said cutting edge portion being brazed to said cartridge body.
Claim 10
Dependent Claim
24 words
A milling cutter according to claim 1, wherein said roughly cutting edges and said finishing cutting edges are detachably mounted on said cartridge body.
Claim 11
Dependent Claim
30 words
A milling cutter according to claim 1, wherein said roughly cutting edges are detachably mounted on said cartridge body, and said finishing cutting edges are brazed to said cartridge body.
Claim 12
Dependent Claim
25 words
A milling cutter according to claim 1, wherein each of said cutting edges of the roughly cutting edge portions includes diamond or cubic boron nitride.
Claim 13
Dependent Claim
28 words
A milling cutter according to claim 1, wherein each of said cutting edges of the finishing cutting edge portions includes abrasive grain partly exposed on a plated layer.
Claim 14
Dependent Claim
26 words
A milling cutter according to claim 12, wherein each of said cutting edges of the finishing cutting edge portions is made of an electrically conductive material.
Claim 15
Dependent Claim
14 words
A milling cutter according to claim 13, wherein said electrically conductive material is steel.
References Cited (Backward Citations)
GB280586A
Cited
GB344262A
Cited
US2216139A
Cited
GB613495A
Cited
US2974399A
Cited
US3242553A
Cited
US3391438A
Cited
US3643310A
Cited
US3701187A
Cited
US3816893A
Cited
US4097174A
Cited
EP0024597B1
Cited
US4551043A
Cited
US4563929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |