Patent US3645579A successfully refreshed from Google Patents.
US3645579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure roller apparatus for rock breaking
Assignee: ROTARY PROFILE ANSTALT
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Filing: 1969-07-10
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Granted: 1972-02-29
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Expires: 1989-07-10
Abstract
Abstract This invention relates to methods of rock breaking which comprise orbiting small rollers around a backing roller that is urged towards the rock face. The rollers each have a raised working zone which is preferably circular in section and which may have hard metal inserts. The rollers may be moved in an arc over the rock face or may be moved stepwise thereof. The working zones apply substantial localized forces to the rock face which forces cause the rock face to break.
Inventors
- 👤 Jacob Marcovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:42
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
Apparatus for breaking rock comprising backing structure; at least one small roller having ends, and being mounted for movement on the backing structure on which the said ends roll in line contact, the roller further having a raised central rockworking zone; means to drive the roller in its path relatively to the backing structure, and means to apply force to the backing structure so that the working zone of the roller may bear with a substantial localized pressure on the rock surface and cause it to break.
Claim 2
Dependent Claim
87 words
Apparatus for breaking rock comprising backing structure; at least one small roller having ends, and being mounted for movement on the backing structure on which the said ends roll in line contact, the roller further having a raised central rockworking zone; means to drive the roller in its path relatively to the backing structure, and means to apply force to the backing structure so that the working zone of the roller may bear with a substantial localized pressure on the rock surface and cause it to break.
Claim 3
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein the central rock-working zone of the roller is of circular section.
Claim 4
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein the backing structure is mounted on a member which is capable of stepwise sideways movement.
Claim 5
Dependent Claim
23 words
Apparatus as claimed in claim 1 further comprising reaction means against which the means to apply force to the backing structure can act.
Claim 6
Dependent Claim
23 words
Apparatus as claimed in claim 1 comprising a series of small rollers mounted for movement in an endless path around the backing structure.
Claim 7
Dependent Claim
57 words
Apparatus as claimed in claim 5 further comprising reaction means against which the means to apply force to the backing structure can act, wherein the backing structure is mounted on a member which is movable relative to the reaction means so that the small rollers can move in an arc in the plane parallel to their axes.
Claim 8
Dependent Claim
13 words
Apparatus as claimed in claim 5 wherein the backing structure comprises large roller.
Claim 9
Dependent Claim
25 words
Apparatus as claimed in claim 7 wherein the backing structure also comprises bush means surrounding the large roller and on which the small rollers roll.
Claim 10
Dependent Claim
14 words
Apparatus as claimed in claim 5 further comprising a cage for the small rollers.
Claim 11
Dependent Claim
29 words
Apparatus as claimed in claim 9 wherein the cage serves to inhibit dirt coming between the rolling surfaces and the parts of the backing structures on which they roll.
Claim 12
Dependent Claim
18 words
Apparatus as claimed in claim 10 wherein the interior of the cage is supplied with liquid under pressure.
References Cited (Backward Citations)
US1276686A
Cited
US1404835A
Cited
US2024764A
Cited
US2184068A
Cited
US2606012A
Cited
US2664281A
Cited
US2639896A
Cited
US2894727A
Cited
US3041055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |