Patent US1827657A successfully refreshed from Google Patents.
Patent US3583503A successfully refreshed from Google Patents.
US3583503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting head assembly
Assignee: LAWRENCE Manufacturing CO
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Filing: 1969-03-12
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Granted: 1971-06-08
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Expires: 1989-03-12
Abstract
Abstract For use with a mining machine or a tunneler and the like, a mounting head having cutters thereon for eroding the walls and facing of the bore of the tunnel or mine. The mounting head has scraper assemblies adjacent to the cutters disposed for clearing a path in advance of the cutters. The scraper assemblies are latchingly coupled to the mounting head and resiliently mounted to facilitate their withdrawal from the walls and facing upon encountering nonyielding rock, earth and like substances.
Inventors
- 👤 William D Coski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:48
CPC Classifications
E; E21; E21B; E21B12/00; E21B12/06; E21B10/00; E21B10/08; E21B10/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
A cutting assembly, for a tunneling machine or the like, comprising: a mounting head movable relative to walls and facing of a drilling bore; cutters mounted to said mounting head for eroding rock, earth, and the like from said walls and facing; first means latchingly mounted to said mounting head for clearing paths of eroded rubble, in advance of said cutters, on said walls and facing; second means carried by said mounting head for urging said pathclearing means into continuous scraping engagement with said walls and facing; and wherein said second means comprises a hanger projectingly extending from said mounting head.
Claim 2
Dependent Claim
101 words
A cutting assembly, for a tunneling machine or the like, comprising: a mounting head movable relative to walls and facing of a drilling bore; cutters mounted to said mounting head for eroding rock, earth, and the like from said walls and facing; first means latchingly mounted to said mounting head for clearing paths of eroded rubble, in advance of said cutters, on said walls and facing; second means carried by said mounting head for urging said pathclearing means into continuous scraping engagement with said walls and facing; and wherein said second means comprises a hanger projectingly extending from said mounting head.
Claim 3
Dependent Claim
36 words
The invention, according to claim 1, wherein: said second means further comprises means for accommodating displacement of said path-clearing means from said walls and facing, upon said path-clearing means encountering nonyielding, obstructing material along said paths.
Claim 4
Dependent Claim
63 words
The invention, according to claim 1, wherein: said mounting head is rotatable about an axis common with the axis of said bore; said cutters comprise a plurality of gage cutters arranged about the periphery of said mounting head; and said first means is carried in proximate adjacency to at least one of said gage cutters, along lines extending transverse to said rotary axis.
Claim 5
Dependent Claim
28 words
The invention, according to claim 3, wherein: said transverse lines comprise radial lines extending from said rotary axis; and said first means is interposed between adjacent gage cutters.
Claim 6
Dependent Claim
23 words
The invention, according to claim 3, wherein: said first means is disposed immediately adjacent to one side of each of said gage cutters.
Claim 7
Dependent Claim
13 words
The invention, according to claim 5, wherein: said one sides are common sides.
Claim 8
Dependent Claim
49 words
The invention, according to claim 1, wherein: said first means comprise a scraper head secured to one end of an extended mounting plate, said plate having a tanglike lip formed on the other end thereof; and said hanger has a latching recess formed therein which engageably receives said lip.
Claim 9
Dependent Claim
23 words
The invention, according to claim 1, wherein: said second means include resilient means operatively disposed between said mounting plate and said mounting head.
Claim 10
Dependent Claim
30 words
The invention, according to claim 8, wherein: said mounting plate has a plurality of spaced-apart, bored-through, lateral appendages; and said resilient means is supported in the bores of said appendages.
Claim 11
Dependent Claim
32 words
The invention, according to claim 9, wherein: said resilient means comprise a rod in penetration of said bores, and a spring having one end in biasing engagement with one of said appendages.
Claim 12
Dependent Claim
55 words
The invention, according to claim 10, wherein: said appendages are two in number; said rod has a circumferential shoulder formed thereabout, intermediate the ends thereof, which shoulder is interpositioned between said appendages, and said rod having one end thereof constrained against said hanger; and said one end of said spring is constrained against said shoulder.
Claim 13
Dependent Claim
44 words
The invention, according to claim 1, wherein: said cutters have a plurality of prominent rows of cutting elements for eroding kerfs in said walls and said facing; and said first means comprise a scraper head having a scraping surface extending transverse to said rows.
Claim 14
Dependent Claim
27 words
The invention, according to claim 12, wherein: said surface comprises an undulated surface in which the crests of the waves thereof are in alignment with said rows.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |