US3570613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gage cutter
Assignee: LAWRENCE Manufacturing CO
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Filing: 1969-03-27
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Granted: 1971-03-16
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Expires: 1989-03-27
Abstract
Abstract A gauge cutter for use with a tunneler or mine machine or the like having a plurality of rows of cutter elements about the periphery thereof, the rows being of such size and positioning as to define an oblate cylinder cutting envelope or plane to equalize the loading on the cutting elements.
Inventors
- 👤 William D Coski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:07
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/50; E21B10/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A gauge cutter for cutting rock in the juncture of the face and wall of a bore, for use with mining machines, tunnelers, and the like, in combination with a cutterhead, comprising: a cutter body, mounted on said cutterhead, having a plurality of circumferential rows of rock-cutting elements thereabout; a majority of said element rows having all said cutting elements thereof operatively disposed, relative to said cutter head, for cutting engagement with said face-and-wall juncture; means spacing said rows a given distance therebetween; means disposing rows of said plurality at diverse radial distances from an axial centerline of said body; and said last-named row-spacing and row-disposing means being cooperative, together with said cutting elements, to define an oblate cylindrical cutting plane about said body.
Claim 2
Dependent Claim
124 words
A gauge cutter for cutting rock in the juncture of the face and wall of a bore, for use with mining machines, tunnelers, and the like, in combination with a cutterhead, comprising: a cutter body, mounted on said cutterhead, having a plurality of circumferential rows of rock-cutting elements thereabout; a majority of said element rows having all said cutting elements thereof operatively disposed, relative to said cutter head, for cutting engagement with said face-and-wall juncture; means spacing said rows a given distance therebetween; means disposing rows of said plurality at diverse radial distances from an axial centerline of said body; and said last-named row-spacing and row-disposing means being cooperative, together with said cutting elements, to define an oblate cylindrical cutting plane about said body.
Claim 3
Dependent Claim
25 words
The invention, according to claim 1, wherein said last-named means and said cutting elements define said cutting plane with diverse diameters at either ends thereof.
Claim 4
Dependent Claim
48 words
The invention, according to claim 1, wherein: rows of at least a first pair of said plurality of rows have a given number of cutting elements equally spaced therebetween; and at least a given row of said plurality has a differing number of cutting elements equally spaced therebetween.
Claim 5
Dependent Claim
42 words
The invention, according to claim 1, wherein: said cutting elements are circumferentially equally spaced therebetween; and the cutting elements of one row of said plurality are rotated from another row, relative to said axial centerline, half the distance of the equal spacing.
Claim 6
Dependent Claim
44 words
The invention, according to claim 1, wherein said rows define a cutting profile in which a first pair of said rowS defines a first given angle, and at least a second pair of said rows defines a second different angle, relative to said centerline.
Claim 7
Dependent Claim
32 words
The invention, according to claim 5, wherein a third pair of said rows defines a portion of said cutting profile at a third angle which distinguishes from said given and different angles.
Claim 8
Dependent Claim
43 words
The invention, according to claim 1, wherein: at least one pair of said rows defines a cutting plane which lies at an acute angle relative to said centerline; and at least one further row of said plurality is in penetration of said plane.
Claim 9
Dependent Claim
34 words
The invention, according to claim 1, wherein: at least one pair of said rows defines a given cutting plane; and at least one further row of said plurality is in penetration of said plane.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |