US3590930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for guiding a rock drill
Assignee: Individual
•
Filing: 1968-12-04
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Granted: 1971-07-06
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Expires: 1988-12-04
Abstract
Abstract The present invention concerns an arrangement for guiding a rock drill, the arrangement consisting of a base, a body, a turnplate turnable about a horizontal axis and attached to the body, a jib attached to the turnplate and turnable in a plane passing through the axis of the turnplate, and a feed device attached to the free end of the jib and turnable in the same plane, in which device a drill has been mounted, the jib and body on one hand and the feed device and jib on the other hand being mutually connected by hydraulic cylinders, which cooperate in such manner that the drilling front, or the direction of the feed device, automatically remains unchanged regardless of the motions of the jib, and in which for the purpose of performing W-cut drilling the body has been journaled to be turnable about a vertical axis. The basis is provided with an angular scale and the body being correspondingly provided with an index, or vice versa.
Inventors
- 👤 Teuvo Tapio Gronfors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/025; E21B7/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A rock drilling apparatus comprising a base, a drill having an axis or rotation, first means interconnecting said drill to said base for universal articulation of the axis of rotation of said drill relative to said base, and second means interconnecting said drill to said first means for controlling the articulation of said drill relative to said base and for maintaining a selected articulation of said drill constant during a change in the articulation of said first means interconnecting said drill to said base.
Claim 2
Dependent Claim
84 words
A rock drilling apparatus comprising a base, a drill having an axis or rotation, first means interconnecting said drill to said base for universal articulation of the axis of rotation of said drill relative to said base, and second means interconnecting said drill to said first means for controlling the articulation of said drill relative to said base and for maintaining a selected articulation of said drill constant during a change in the articulation of said first means interconnecting said drill to said base.
Claim 3
Dependent Claim
83 words
A rock drilling apparatus as claimed in claim 1 wherein said first means interconnecting said drill to said base for universal articulation includes a body journaled on said base for swivel movement in a first plane, a turnplate journaled on said body for swivel movement in a second plane transversely of said first plane, a job pivotally supported on said turnplate, and a guide pivotally supported on said jib remote from said turnplate, said drill being elongate and rotatably supported on said guide.
Claim 4
Dependent Claim
146 words
A rock drilling apparatus as claimed in claim 2 wherein said second means interconnecting said drill to said first means for controlling the articulation of said drill includes first power means supported on said turnplate and cooperating with said jib for selectively adjusting the angular position of said jib, second power means supported on said turnplate and cooperating with said jib for sensing a change in the angular position of said jib as adjusted by said first power means, third power means supported on said jib and cooperating with said second power means and said guide for maintaining the angular position of said guide constant when the angular position of said jib is adjusted by said first power means, and means interconnecting with said second and third means for channelling an intelligence medium of sensed quantity from said second power means to said third power means.
Claim 5
Dependent Claim
81 words
A rock drilling apparatus as claimed in claim 3 wherein said first, second, and third power means each includes a hydraulic cylinder, said second and third power means being interconnected by a conduit for channelling a specific quantity of fluid from the second power means to the third power means, which quantity of fluid defines a change in the articulation of the jib and effects an adjustment in the articulation of the guide thereby maintaining the articulation of the drill constant.
Claim 6
Dependent Claim
26 words
A rock drilling apparatus as claimed in claim 1 wherein said base includes an angular scale and said body includes an index cooperating with said scale.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |