Apparatus for grinding welded rail
Abstract
Abstract APPARATUS FOR GRINDING WELDS FORMED BY WELDING RAIL SECTIONS IN END TO END RELATION TO FORM A CONTINUOUS RAIL. A PAIR OF BELT TYPE GRINDING HEADS SIMULTANEOUSLY GRIND THE RAIL HEAD RUNNING SURFACE AND THE RAIL BASE WITH ONLY MINIMAL AREAS ADJACENT THE UPSET OR WELD AREAS BEING ENGAGED BY THE BELTS. THE RAIL IS HELD IN STATIONARY POSITION DURING THE GRINDING AND ONE OF THE HEADS IS TURNED AROUND THE RAIL HEAD TO EFFECT CURVILINEAR OR ARCUATE GRINDING WHILE THE OTHER HEAD GRINDS THE UNDERSIDE OF THE RAIL BASE. THE HEADS ARE MOVED LONGITUDINALLY ACROSS THE WELD AND ARE SIMULTANEOUSLY MOVED TRANSVERSELY INTO AND OUT OF GRINDING ENGAGEMENT WITH THE WELD DURING EACH LONGITUDINAL PASS SO THAT EACH BELT FOLLOWS A CURVED PATH LYING TANGENT TO THE RAIL AT THE UPSET, WHEREBY MAXIMUM GRINDING OCCURS AT THE UPSET AND DEPTH OF THE GRIND FEATHERS OUT AS EACH HEAD MOVES BEYOND THE UPSET.
Inventors
- 👤 Karl L Lindmark
Bibliographic Details
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |