US3889906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill Boom
Assignee: Atlas Copco AB
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Filing: 1973-12-06
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Granted: 1975-06-17
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Expires: 1993-12-06
Abstract
Abstract A rock drilling apparatus is positioned to different drilling positions with respect to a support by a drill boom. The drill boom is pivoted on cross shafts respectively to a boom bracket and a boom head carrying the rock drilling apparatus. The boom bracket is furthermore rotatably journalled on the support around a polar axis, which is disposed in a pivotal plane for the rock drilling apparatus normal to the cross shafts. The boom bracket supports the cross shafts and the drill boom in laterally spaced relation to the pivotal plane while the boom head carries the rock drilling apparatus pivotally in said plane with a free motion clearance relative to the drill boom.
Inventors
- 👤 Erich Voldemar Kimber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:52
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/087
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
A drill boom arrangement for positioning an elongated rock drilling apparatus to different drilling positions with respect to a support comprising in combination therewith a boom bracket, a base shaft on said bracket for rotatable journalling thereof on said support about a polar axis, a first cross shaft on said bracket, a drill boom pivoted at the rear end thereof on said first cross shaft in a plane parallel with but spaced laterally from said polar axis, a second cross shaft at the forward end of said drill boom, a boom head supported on said second cross shaft for carrying said rock drilling apparatus with a free motion clearance relative to said drill boom pivotally in a plane normal to said cross shafts and passing through said polar axis, hydraulic cylinder means pivotally connected to said drill boom and further pivotally connected respectively to said boom head and to said bracket for pivoting respectively said boom head and boom, and power means for rotating said base shaft.
Claim 2
Dependent Claim
167 words
A drill boom arrangement for positioning an elongated rock drilling apparatus to different drilling positions with respect to a support comprising in combination therewith a boom bracket, a base shaft on said bracket for rotatable journalling thereof on said support about a polar axis, a first cross shaft on said bracket, a drill boom pivoted at the rear end thereof on said first cross shaft in a plane parallel with but spaced laterally from said polar axis, a second cross shaft at the forward end of said drill boom, a boom head supported on said second cross shaft for carrying said rock drilling apparatus with a free motion clearance relative to said drill boom pivotally in a plane normal to said cross shafts and passing through said polar axis, hydraulic cylinder means pivotally connected to said drill boom and further pivotally connected respectively to said boom head and to said bracket for pivoting respectively said boom head and boom, and power means for rotating said base shaft.
Claim 3
Dependent Claim
33 words
A drill boom arrangement according to claim 1 in which said hydraulic cylinder means connected between said drill boom and said boom bracket comprises a pair of adjacent cylinders of substantially equal size.
Claim 4
Dependent Claim
39 words
A drill boom arrangement according to claim 2 in which said hydraulic cylinder means connected between said drill boom and said boom head comprises a third cylinder of substantially equal size with each cylinder of said pair of cylinders.
Claim 5
Dependent Claim
31 words
A drill boom arrangement according to claim 1 in which said bracket is provided with an arm transversely directed in relation to said normal plane for carrying said first cross shaft.
Claim 6
Dependent Claim
23 words
A drill boom arrangement according to claim 4 in which said first cross shaft is carried in coplanar alignment with said polar axis.
Claim 7
Dependent Claim
45 words
A drill boom arrangement according to claim 4 in which said bracket is further provided with pivot means parallel with said first cross shaft and laterally spaced in relation to said normal plane for the pivotal connection of said hydraulic cylinder means to said bracket.
Claim 8
Dependent Claim
103 words
A drill boom arrangement according to claim 1 in which means are incorporated in said drill boom for the contraction and extension thereof, and further including means for mounting said drilling apparatus in longitudinally movable relation on said boom head, and additional hydraulic cylinder means connected between said boom head and drilling apparatus for moving said drilling apparatus in the longitudinal direction thereof relative to said boom head to compensate contraction of said drill boom by a longitudinal extension of said drilling apparatus so as to safeguard a free motion clearance between the rear end of said drilling apparatus and said boom support.
Claim 9
Dependent Claim
164 words
An improved boom bracket for supporting a drill boom pivotally with respect thereto and of the type wherein the bracket includes a first shaft rotatably journalled on a support including means for powered rotation of said shaft about a polar axis and the drill boom carries a rock drilling apparatus thereon pivotally in a first plane passing through said polar axis, the improvement comprising an arm on said bracket transversely directed in relation to said first plane, a bore in said arm laterally spaced in relation to said first plane and with its geometrical axis perpendicular thereto, a second shaft rotatably journalled in said bore and connected to said drill boom, a third shaft on said arm laterally spaced in relation to said first plane and parallel with said second shaft, and power means pivotally connected between said third shaft and said drill boom for pivoting said drill boom in a second plane parallel with but in laterally spaced relation to said first plane.
Claim 10
Dependent Claim
164 words
An improved boom bracket for supporting a drill boom pivotally with respect thereto and of the type wherein the bracket includes a first shaft rotatably journalled on a support including means for powered rotation of said shaft about a polar axis and the drill boom carries a rock drilling apparatus thereon pivotally in a first plane passing through said polar axis, the improvement comprising an arm on said bracket transversely directed in relation to said first plane, a bore in said arm laterally spaced in relation to said first plane and with its geometrical axis perpendicular thereto, a second shaft rotatably journalled in said bore and connected to said drill boom, a third shaft on said arm laterally spaced in relation to said first plane and parallel with said second shaft, and power means pivotally connected between said third shaft and said drill boom for pivoting said drill boom in a second plane parallel with but in laterally spaced relation to said first plane.
Claim 11
Dependent Claim
31 words
A boom bracket according to claim 8 in which there is provided a pair of adjacent hydrAulic cylinders of substantially equal size connected between said third shaft and said drill boom.
Claim 12
Dependent Claim
29 words
A boom bracket according to claim 9 wherein said adjacent hydraulic cylinders are substantially parallel arranged with respect to each other, and are pivotally connected to said drill boom.
References Cited (Backward Citations)
US3021099A
Cited
US3020012A
Cited
US3117756A
Cited
US3212738A
Cited
US3374975A
Cited
US3470969A
Cited
US3476193A
Cited
US3711047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |