US3894587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for drilling in hard rock formation
Assignee: HYDROSOL
•
Filing: 1973-12-07
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Granted: 1975-07-15
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Expires: 1993-12-07
Abstract
Abstract The invention concerns a drilling device having a plurality of rotary drilling members arranged to rotate about axes transverse to the drilling direction. Said drilling members are arranged in pairs mounted one on either side of and adjacent to a plate-like support.
Inventors
- 👤 Claude Sourice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/18; E02; E02D; E02D17/00; E02D17/13; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/20; E02F3/205; E21B4/04; E21B4/16; E21B7/00; E21B7/001; E21D; E21D1/00; E21D1/03; E21D1/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A drilling device comprising: at least two pairs of rotary drilling members, each pair being arranged to rotate about an axis transverse to the drilling direction; a plate-like support for each pair of said drilling members, said supports being disposed in a common plane symmetrically on either side of a central transverse plane of said device, each pair of said drilling members being mounted on either side of, and adjacent to a plate-like support; a motor unit carried by each of said plate-like supports having a single rotatable shaft extending toward each drilling member of said pair, said drilling members being mounted for rotation on said shaft, the direction of rotation of said drilling members being such that excavated material is carried toward said central transverse plane; means for providing power to each of said motor units passing through each of said plate-like supports; and means for removing said excavated material from the vicinity of said device.
Claim 2
Dependent Claim
157 words
A drilling device comprising: at least two pairs of rotary drilling members, each pair being arranged to rotate about an axis transverse to the drilling direction; a plate-like support for each pair of said drilling members, said supports being disposed in a common plane symmetrically on either side of a central transverse plane of said device, each pair of said drilling members being mounted on either side of, and adjacent to a plate-like support; a motor unit carried by each of said plate-like supports having a single rotatable shaft extending toward each drilling member of said pair, said drilling members being mounted for rotation on said shaft, the direction of rotation of said drilling members being such that excavated material is carried toward said central transverse plane; means for providing power to each of said motor units passing through each of said plate-like supports; and means for removing said excavated material from the vicinity of said device.
Claim 3
Dependent Claim
41 words
A device according to claim 1, wherein said support is mounted on a frame, said frame having guide elements arranged to cooperate with the side walls of the hole to be excavated and said frame including attachment means for supporting members.
Claim 4
Dependent Claim
53 words
A device according to claim 1 wherein each drilling member of said pair has a protruding helical configuration thereon to which are affixed drilling tools, said pair of drilling members defining opposed helical paths so that on rotation of said drilling members, excavated materials are carried by said configuration toward said plate-like support.
Claim 5
Dependent Claim
52 words
A device according to claim 3, wherein at least one of said tools on each of said rotary drilling members is mounted adjacent said support and projects laterally towards said support, said support having a corresponding annular groove, coaxial with said support, to receive said tool on rotation of said drilling member.
Claim 6
Dependent Claim
28 words
A device according to claim 4, wherein the portion of said support radially outside said groove is thicker than the portion of said support radially inside said groove.
Claim 7
Dependent Claim
29 words
A device according to claim 4, wherein said tools are oriented towards said support, inside said grooves and radially outwardly of the axis of rotation of said drilling members.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |