US3835936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling machine suspension
Assignee: Craelius AB
•
Filing: 1973-09-26
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Granted: 1974-09-17
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Expires: 1993-09-26
Abstract
Abstract A drilling machine is mounted on a slide which is movable along a feed beam. The drilling machine is connected to the slide by means of a hinge which is situated farther from the feed beam than the drill axis defined by the drilling machine. Furthermore an elastic element has been provided between the drilling machine and the slide, the stiffness of the elastic element being such that the direction of the drill axis is independent of the applied feed force.
Inventors
- 👤 J Lagerstedt
- 👤 J Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B19/00; E21B19/08; E21B19/084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A device relating to drilling machines and comprising a feed beam, a slide movable along the feed beam, and a drilling machine to which a drill string is connectable, said drilling machine being connected to the slide by means of a hinge, directed transversely to the drill axis of said drill string, and an elastic element arranged between the drilling machine and the slide for opposing rotation round said hinge, said drill axis being situated between said hinge and the feed beam.
Claim 2
Independent Claim
82 words
A device relating to drilling machines and comprising a feed beam, a slide movable along the feed beam, and a drilling machine to which a drill string is connectable, said drilling machine being connected to the slide by means of a hinge, directed transversely to the drill axis of said drill string, and an elastic element arranged between the drilling machine and the slide for opposing rotation round said hinge, said drill axis being situated between said hinge and the feed beam.
Claim 3
Dependent Claim
26 words
A device according to claim 1, in which the hinge comprises two pivots arranged on the slide and two therewith cooperating recesses in the drilling machine.
Claim 4
Dependent Claim
25 words
A device according to claim 2, in which the elastic element comprises a rubber cushion and two metal plates rigidly connected to the rubber cushion.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |