US3598447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter bits and blocks for mining machines
Assignee: Sandvik Rock Tools Inc
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Filing: 1969-06-30
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Granted: 1971-08-10
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Expires: 1989-06-30
Abstract
Abstract A cutter bit for a mining machine, the shank of which is in the shape of an inverted U, is adapted for mounting upon a block having a complementary-shaped recess in its midportion defining a bit-receiving zone to receive and releasably hold the cutter bit. The cutter bit may have a single head containing a single widerthan-normal hard cutting tip, or it may contain two or more heads, each containing cutting tips mounted transverse to the direction of cutting.
Inventors
- 👤 Arnold B Bower Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:44
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/193; E21C35/1936; E21C35/183; E21C35/1833
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A bit-block combination for a mining machine comprising a cutter bit and a block on which the bit is releasably held, said bit having a head portion and a shank portion generally falling along a single vertical plane, said head portion containing at least one hard cutting tip mounted on the leading edge thereof facing the direction of cutting, the direction of cutting being generally perpendicular to the plane of the head and shank portions, the shank portion of the bit having two leg members extending vertically and separately from the junction of the head and shank portions, said block member having a bit-receiving zone along a vertical midportion thereof, the dimension of said block in the direction of cutting being greater than the dimension transverse thereto, the leg members of the shank of said bit straddling said bit-receiving zone of the block and releasably held thereon.
Claim 2
Dependent Claim
147 words
A bit-block combination for a mining machine comprising a cutter bit and a block on which the bit is releasably held, said bit having a head portion and a shank portion generally falling along a single vertical plane, said head portion containing at least one hard cutting tip mounted on the leading edge thereof facing the direction of cutting, the direction of cutting being generally perpendicular to the plane of the head and shank portions, the shank portion of the bit having two leg members extending vertically and separately from the junction of the head and shank portions, said block member having a bit-receiving zone along a vertical midportion thereof, the dimension of said block in the direction of cutting being greater than the dimension transverse thereto, the leg members of the shank of said bit straddling said bit-receiving zone of the block and releasably held thereon.
Claim 3
Dependent Claim
37 words
The bit-block combination of claim 1 in which the cutter bit has two head portions extending separately from the shank portion, each of said head portions containing a hard cutting tip mounted on the leading edge thereof.
Claim 4
Dependent Claim
24 words
The bit-block combination of claim 1 in which the bit-receiving zone of the block member is in the form of a inverted U-shaped recess.
Claim 5
Dependent Claim
29 words
The bit-block of claim 1 in which the bit is releasably held on the block by a bolt threaded through a bore in the forward portion of the block.
Claim 6
Dependent Claim
139 words
A cutter bit for a mining machine having a Shank portion and at least two head portions extending separately from the shank portion, said head and shank portions generally falling along a single vertical plane, each of said head portions containing at least one hard cutting tip mounted on the leading edge thereof facing the direction of cutting and extending across the head portion transverse to the cutting direction, the direction of cutting being generally perpendicular to the plane of the head and shank portions, said shank portion having two leg members extending vertically and separately from the junction of the head and shank portions, the dimension of each of said leg members in the direction of cutting being greater than the dimension transverse thereto, said leg members adapted to straddle the block in which the bit is held.
Claim 7
Dependent Claim
139 words
A cutter bit for a mining machine having a Shank portion and at least two head portions extending separately from the shank portion, said head and shank portions generally falling along a single vertical plane, each of said head portions containing at least one hard cutting tip mounted on the leading edge thereof facing the direction of cutting and extending across the head portion transverse to the cutting direction, the direction of cutting being generally perpendicular to the plane of the head and shank portions, said shank portion having two leg members extending vertically and separately from the junction of the head and shank portions, the dimension of each of said leg members in the direction of cutting being greater than the dimension transverse thereto, said leg members adapted to straddle the block in which the bit is held.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |