Patent US4679932A successfully refreshed from Google Patents.
Patent US3750769A successfully refreshed from Google Patents.
US3750769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe positioner for earth boring machine
Assignee: Tamrock Canada Inc
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Filing: 1971-10-29
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Granted: 1973-08-07
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Expires: 1991-10-29
Abstract
Abstract A drill pipe positioner that will lift, position and release a section of drill pipe in proper relation to the drill head and other elements of an earth boring machine and by reversing the action will attach to a section of drill pipe, lift and release it for removal and stacking. A first arm pivots on the support columns and a second arm unit pivots on the first arm. Grippers are attached to the second arm unit for gripping and holding a section of drill pipe.
Inventors
- 👤 J Young
- 👤 G Cason
- 👤 E Kunkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:45
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/20; E21B7/00; E21B7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
In an earth boring apparatus including support columns and drilling means mounted for travel along said support columns, a drill pipe positioner comprising: first movable arm means for movement in a first plane relative to said support columns, first hinge means connecting said first movable arm means to said support columns for allowing said first movable arm means to pivot relative to said suppot columns, a first hydraulic cylinder connected between said support columns and said first movable arm means for supplying force to move said first movable arm means, second movable arm means connected substantially perpendicular to said first movable arm means for movement relative to said first movable arm means, second hinge means connecting said first movable arm means perpendicularily to said second movable arm means for allowing said second movable arm means to pivot perpendicularily to said first movable arm means, a second hydraulic cylinder connected between said first movable arm means and said second movable arm means for supplying force to move said first movable arm means, and gripping means for gripping a section of drill pipe.
Claim 2
Dependent Claim
181 words
In an earth boring apparatus including support columns and drilling means mounted for travel along said support columns, a drill pipe positioner comprising: first movable arm means for movement in a first plane relative to said support columns, first hinge means connecting said first movable arm means to said support columns for allowing said first movable arm means to pivot relative to said suppot columns, a first hydraulic cylinder connected between said support columns and said first movable arm means for supplying force to move said first movable arm means, second movable arm means connected substantially perpendicular to said first movable arm means for movement relative to said first movable arm means, second hinge means connecting said first movable arm means perpendicularily to said second movable arm means for allowing said second movable arm means to pivot perpendicularily to said first movable arm means, a second hydraulic cylinder connected between said first movable arm means and said second movable arm means for supplying force to move said first movable arm means, and gripping means for gripping a section of drill pipe.
References Cited (Backward Citations)
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |