Patent US3779323A successfully refreshed from Google Patents.
US3779323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth cutter mounting means
Assignee: Ingersoll Rand Co
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Filing: 1972-04-27
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Granted: 1973-12-18
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Expires: 1992-04-27
Abstract
Abstract Mounting arrangements for roller-type earth cutters, used in continuous boring or tunneling machine, which prevent an excessive loading of a cutter. In one embodiment, spring-type means urge the cutters outwardly from a support and thrust surface, such as a cutterhead, and yields under a predetermined load to allow inward movement of the cutter to prevent overloading thereof. In another embodiment, hydraulic-fluidpressure-powered plungers, manifolded together from a common source of fluid pressure, urge cutters against the work face, and excessive loading of any one cutter displaces some of its plunger fluid to other cutter plungers whereby the loading is substantially averaged for all cutters.
Inventors
- 👤 C Horten
- 👤 W Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1006; E21D9/104
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
In combination, earth cutter mounting means, comprising: a plurality of earth cutters, and mountings therefor adapted to be mounted, in common, on a thrust member for urging said cutters into operative contact with earth; wherein each of said cutters is movably connected to its mounting, for movement toward and away from the thrust member; pressure means for each cutter, cooperative with said mountings, for yieldably urging the associated cutter away from the thrust member; and means cooperative with said pressure means for maintaining relatively constant and uniform the urging force applied by said pressure means to each of the associated cutters.
Claim 2
Dependent Claim
101 words
In combination, earth cutter mounting means, comprising: a plurality of earth cutters, and mountings therefor adapted to be mounted, in common, on a thrust member for urging said cutters into operative contact with earth; wherein each of said cutters is movably connected to its mounting, for movement toward and away from the thrust member; pressure means for each cutter, cooperative with said mountings, for yieldably urging the associated cutter away from the thrust member; and means cooperative with said pressure means for maintaining relatively constant and uniform the urging force applied by said pressure means to each of the associated cutters.
Claim 3
Dependent Claim
172 words
Earth cutter mounting means adapted to be mounted on a thrust member, comprising: means for cutting earth; and means coupled to said cutting means adapted for mounting said earth cutting means to a thrust member; said mounting means including means for effecting movement of said earth cutting means relative to said mounting means and a forced address of said cutting means, from a thrust member, into thrust loading engagement with earth; wherein said movement and forced-address effecting means comprise means operatively reactive, in response to an excessive thrust loading engagement of said cutting means with earth, to effect a relief of said excessive loading of said earth cutting means said earth cutting means comprises a plurality of rotatable earth cutters; said mounting means comprises means for rotatably mounting each rotatable earth cutter of said plurality thereof separately to a thrust member; and said reactive means includes means, responsive to a forceable engagement of said earth cutters with earth for substantially equalizing the force with which each of said cutters effects forceable engagement.
Claim 4
Dependent Claim
172 words
Earth cutter mounting means adapted to be mounted on a thrust member, comprising: means for cutting earth; and means coupled to said cutting means adapted for mounting said earth cutting means to a thrust member; said mounting means including means for effecting movement of said earth cutting means relative to said mounting means and a forced address of said cutting means, from a thrust member, into thrust loading engagement with earth; wherein said movement and forced-address effecting means comprise means operatively reactive, in response to an excessive thrust loading engagement of said cutting means with earth, to effect a relief of said excessive loading of said earth cutting means said earth cutting means comprises a plurality of rotatable earth cutters; said mounting means comprises means for rotatably mounting each rotatable earth cutter of said plurality thereof separately to a thrust member; and said reactive means includes means, responsive to a forceable engagement of said earth cutters with earth for substantially equalizing the force with which each of said cutters effects forceable engagement.
Claim 5
Dependent Claim
34 words
Earth cutter mounting means, according to claim 2, wherein: said reactive means comprises fluid-powered motor means disposed for engagement with said thrust member, upon said mounting means being adaptedly fixed to a thrust member.
Claim 6
Dependent Claim
16 words
Earth cutter mounting means, according to claim 3, wherein: said motor means comprises a hydraulic-powered ram.
Claim 7
Dependent Claim
43 words
Earth cutter mounting means, according to claim 2, wherein: said mounting means comprises means accommodating for movement of said cutters into positions of greater and lesser proximity relative to a thrust member, upon said mounting means being adaptedly fixed to said thrust member.
Claim 8
Dependent Claim
48 words
Earth cutter mounting means, according to claim 2, wherein: said reactive means comprises means operative for relIeving an excessive thrust loading force with which at least one of said cutters engages rock while increasing a thrust loading force with which at least another of said cutters engages earth.
Claim 9
Dependent Claim
19 words
Earth cutter mounting means, according to claim 6, wherein: said force relieving and force-increasing means are substantially simultaneously operative.
Claim 10
Dependent Claim
69 words
Earth cutter mounting means, according to claim 2, wherein: said reactive means comprises means operative both for diminishing the force with which at least one of said cutters engages earth by a factor of a given value and for increasing the force with which each cutter in a plurality of said cutters, other than said one cutter, engages earth by a factor of less than said given value, simultaneously.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |