Patent US3884312A successfully refreshed from Google Patents.
US3884312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock cutter assemblies
Assignee: Robbins Co
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Filing: 1973-09-12
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Granted: 1975-05-20
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Expires: 1993-09-12
Abstract
Abstract A plurality of rock cutter wheels are mounted for independent free rotation about a common support shaft. The support shaft is supported by a pair of end mounts which also carry seal rings presenting radial faces of hard material against the outer end surfaces of the cutter wheels adjacent the end mounts. A similar seal ring is provided between each adjacent pair of cutter wheels. Each such seal ring is carried by one of the cutter wheels and make sliding sealing contact with an end surface portion of the other.
Inventors
- 👤 William C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:58
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; E; E21; E21B; E21B10/00; E21B10/08; E21B10/12; E21B10/20; E21B10/22; E21D; E21D9/00; E21D9/10; E21D9/1006; E21D9/104; F16C19/00; F16C19/22; F16C19/34; F16C19/38; F16C19/383; F16C19/385; F16C19/386; F16C19/54; F16C19/541; F16C2352/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
A rock cutter assembly comprising, first and second rock cutter wheels mounted axially adjacent each other for independent free rotation about a common axis, a hard material seal ring between said cutter wheels, means mounting said seal ring onto said first cutter wheel for rotation therewith and in sliding sealing contact with said second cutter wheel.
Claim 2
Dependent Claim
56 words
A rock cutter assembly comprising, first and second rock cutter wheels mounted axially adjacent each other for independent free rotation about a common axis, a hard material seal ring between said cutter wheels, means mounting said seal ring onto said first cutter wheel for rotation therewith and in sliding sealing contact with said second cutter wheel.
Claim 3
Dependent Claim
22 words
A rock cutter assembly according to claim 1, further comprising static seal means between said seal ring and said first cutter wheel.
Claim 4
Dependent Claim
38 words
A rock cutter assembly according to claim 1, wherein each said roller cutter is a disc type cutter, each having a circumferential cutting edge flanked by a pair of sloping rock breaker surfaces intersecting at the cutting edge.
Claim 5
Dependent Claim
61 words
A rock cutter assembly according to claim 1, wherein said first and second cutter wheels arE annular, said first cutter wheel surrounds and is supported for rotation by a first bearing assembly, said second cutter wheel surrounds and is supported for rotation by a second bearing assembly, and said seal ring is located axially between said first and second bearing assemblies.
Claim 6
Dependent Claim
24 words
A rock cutter assembly according to claim 4, wherein said first cutter wheel includes an end recess in which said seal ring is housed.
Claim 7
Dependent Claim
35 words
A rock cutter assembly according to claim 5, wherein said second cutter wheel includes an end recess into which extend the recessed end portion of said first cutter wheel and the seal ring carried thereby.
Claim 8
Dependent Claim
36 words
A rock cutter assembly according to claim 6, wherein said second cutter wheel includes generally a radial seal surface forming the base of its recess and the seal ring makes sliding sealing contact with said surface.
Claim 9
Dependent Claim
83 words
A rock cutter assembly according to claim 6, wherein said first cutter wheel includes an annular end portion located radially outwardly of its said end recess in which the sealing ring is located, and said second cutter wheel includes an annular shoulder portion situated radially outwardly of the end recess in said second cutter wheel, said shoulder portion surrounding the annular end portion of the first cutter wheel, with a small dimension clearance existing between said annular shoulder and said annular end portion.
Claim 10
Dependent Claim
22 words
A rock cutter assembly according to claim 6, further comprising static seal means between said seal ring and said first cutter wheel.
Claim 11
Dependent Claim
36 words
A rock cutter assembly according to claim 9, wherein said static seal means is a ring of elastomeric material which is in compression when the seal ring is in sealing contact with the second cutter wheel.
Claim 12
Dependent Claim
74 words
A rock cutter assembly comprising a fixed support shaft, three sets of bearings arranged end-to-end on said shaft, and three roller cutter wheels mounted for independent free rotation on and by said bearings, with the center cutter wheel having recesses at each of its ends into which a hard material seal ring is received, and with each of the end cutter wheels having radial surface portions making sliding sealing contact with said seal rings.
Claim 13
Dependent Claim
74 words
A rock cutter assembly comprising a fixed support shaft, three sets of bearings arranged end-to-end on said shaft, and three roller cutter wheels mounted for independent free rotation on and by said bearings, with the center cutter wheel having recesses at each of its ends into which a hard material seal ring is received, and with each of the end cutter wheels having radial surface portions making sliding sealing contact with said seal rings.
Claim 14
Dependent Claim
37 words
A rock cutter assembly according to claim 11, comprising a pair of end mounts for said support shaft, and a hard material seal ring between each end mount and the outer end of the adjacent cutter wheel.
Claim 15
Dependent Claim
49 words
A rock cutter assembly according to claim 12, wherein the hard material seal rings which are between each end mount and the outer end of the adjacent cutter wheel are carried by said end mounts and make sliding sealing contact with generally radial end surfaces on the cutter wheels.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |