US3695369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth boring machine with a pivotal head
Assignee: Tamrock Canada Inc
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Filing: 1970-09-09
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Granted: 1972-10-03
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Expires: 1990-09-09
Abstract
Abstract The drill head of a raise drill is mounted to allow pivoting in one or more planes. Bending forces on the drill string and raise drill components are reduced, eliminated or controlled. An indicator provides the operator with information concerning alignment and misalignment.
Inventors
- 👤 James M Drouet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:39
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/024; E21B3/00; E21B3/02; E21B3/022
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
An earth boring machine with pivotable drilling means comprising: support means; carriage means adapted for travel along said support means; drilling means for rotating a rotary drill column; means between said carriage means and said drilling means for providing relative movement of the drilling means in at least one plane, said means including a hinge between said carriage means and said drilling means; and adjustable means positioned between said carriage means and said drilling means for selectively preventing and controlling relative movement of the drilling means.
Claim 2
Dependent Claim
86 words
An earth boring machine with pivotable drilling means comprising: support means; carriage means adapted for travel along said support means; drilling means for rotating a rotary drill column; means between said carriage means and said drilling means for providing relative movement of the drilling means in at least one plane, said means including a hinge between said carriage means and said drilling means; and adjustable means positioned between said carriage means and said drilling means for selectively preventing and controlling relative movement of the drilling means.
Claim 3
Dependent Claim
30 words
The earth boring machine of claim 1 including pivot means between said carriage means and said drilling means for providing relative movement of the drilling means in a second plane.
Claim 4
Dependent Claim
23 words
The earth boring machine of claim 1 including means for providing an indication of the degree of relative movement of said drilling means.
Claim 5
Dependent Claim
46 words
The earth boring machine of claim 3 wherein said means for providing an indication of the degree of relative movement of said drilling means includes a pointer connected to said means for providing and controlling relative movement of the drilling means and a visual indicator plate.
Claim 6
Dependent Claim
25 words
The earth boring machine of claim 4 including alarm means for providing an alarm when the relative movement of the drilling means exceeds predetermined limits.
Claim 7
Dependent Claim
100 words
A raise drill with a pivotable drill head, comprising: a base; support column means pivotally connected to said base; a carriage adapted for travel along said support column means; a drill head; power means connected to said drill head; and means between said carriage and said drill head for providing relative movement of the drill head in at least one plane, said means including a hinge between said carriage and said drill head, and wherein said raise drill includes adjustable means positioned between said carriage and said drill head for selectively preventing and controlling relative movement of said drill head.
Claim 8
Dependent Claim
100 words
A raise drill with a pivotable drill head, comprising: a base; support column means pivotally connected to said base; a carriage adapted for travel along said support column means; a drill head; power means connected to said drill head; and means between said carriage and said drill head for providing relative movement of the drill head in at least one plane, said means including a hinge between said carriage and said drill head, and wherein said raise drill includes adjustable means positioned between said carriage and said drill head for selectively preventing and controlling relative movement of said drill head.
Claim 9
Dependent Claim
22 words
The raise drill of claim 6 including means for providing an indication of the degree of relative movement of said drill head.
Claim 10
Independent Claim
167 words
A method of drilling a large diameter hole from a first level to a second level, comprising: positioning a raise drill at said first level, said raise drill including a drill head pivotally mounted and adapted to pivot in at least one plane; establishing a drill line; adjusting the position of said drill head by causing said drill head to pivot until the drill head is aligned with said drill line; locking said drill head to prevent it from pivoting; rotating and passing a pilot bit along said drill line to form a pilot hole; removing said pilot bit; attaching a raise bit; unlocking said drill head to allow it to pivot freely; rotating and hydraulically raising the raise bit along said pilot hole to form a large diameter hole; detecting deviations of the pilot hole from said drill line; adjusting the position of said drill head by causing said drill head to pivot; and continuing to rotate and pass and pilot bit along said drill line.
Claim 11
Independent Claim
167 words
A method of drilling a large diameter hole from a first level to a second level, comprising: positioning a raise drill at said first level, said raise drill including a drill head pivotally mounted and adapted to pivot in at least one plane; establishing a drill line; adjusting the position of said drill head by causing said drill head to pivot until the drill head is aligned with said drill line; locking said drill head to prevent it from pivoting; rotating and passing a pilot bit along said drill line to form a pilot hole; removing said pilot bit; attaching a raise bit; unlocking said drill head to allow it to pivot freely; rotating and hydraulically raising the raise bit along said pilot hole to form a large diameter hole; detecting deviations of the pilot hole from said drill line; adjusting the position of said drill head by causing said drill head to pivot; and continuing to rotate and pass and pilot bit along said drill line.
Claim 12
Dependent Claim
179 words
A raise drilling apparatus adapted to be positioned in a mine to drill a large diameter raise hole from one level of the mine to another level of the mine by rotaTion of a rotary drill string; comprising: a base adapted to be positioned at one level of the mine; at least one support pivotally connected to said base; a carriage movably connected to said at least one support for travel along said support; rotary drilling means carried by said carriage for drilling a large diameter raise hole from one level of the mine to another level of the mine, said rotary drilling means including a rotary drill head for connecting said drill string to said rotary drilling means and a power unit for transmitting rotary power to the drill head; pivot means connecting said drill head to said carriage for allowing free pivoting movement of the drill head to provide proper alignment of the drill string and drill head; and means connected to said pivot means for controlling the degree of free pivoting movement of the drill head.
Claim 13
Dependent Claim
179 words
A raise drilling apparatus adapted to be positioned in a mine to drill a large diameter raise hole from one level of the mine to another level of the mine by rotaTion of a rotary drill string; comprising: a base adapted to be positioned at one level of the mine; at least one support pivotally connected to said base; a carriage movably connected to said at least one support for travel along said support; rotary drilling means carried by said carriage for drilling a large diameter raise hole from one level of the mine to another level of the mine, said rotary drilling means including a rotary drill head for connecting said drill string to said rotary drilling means and a power unit for transmitting rotary power to the drill head; pivot means connecting said drill head to said carriage for allowing free pivoting movement of the drill head to provide proper alignment of the drill string and drill head; and means connected to said pivot means for controlling the degree of free pivoting movement of the drill head.
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US1954957A
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US2775439A
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US2848196A
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US3220494A
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |