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US3888052A Expired / Lapsed US ⏱️ 0.0 years remaining

Relating to methods for grinding rails

Assignee: Speno International SA
•
Filing: 1973-06-07
•
Granted: 1975-06-10
•
Expires: 1993-06-07
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Abstract

Abstract Method for grinding rails by means of a rail-borne vehicle, a frame movably supported on the vehicle, and at least one grinding unit adjustably mounted on the frame and arranged to provide at least one rail grinding zone. A rail follower is mounted on the frame substantially in line with the grinding zone, and the grinding unit is so supported that at least the grinding zone is adjustable transversely of the rail direction. At least one of the grinding zone and rail follower is locatable at different selected longitudinal spacings. The follower includes at least two points which contact the rail and by adjusting the grinding zone relative to the two point contact afforded by the follower, an optimum grinding position can be obtained dependent on the irregularities of the rail to be trued.

Inventors

  • 👤 Romolo Panetti

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 19:20
CPC Classifications
E; E01; E01B; E01B31/00; E01B31/02; E01B31/12; E01B31/17

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 81 words
A method of truing a rail by grinding comprising mounting a reference base by two point contact with a rail to be ground, adjustably mounting a plurality of spaced grinders on the base to co-operate with the rail at respective grinding zones in line with said two points, and adjusting the longitudinal spacing between the grinders to shift said grinding zones longitudinally of the two point line to an optimum position dependent on the irregularities of the rail to be trued.
Claim 2
Independent Claim 81 words
A method of truing a rail by grinding comprising mounting a reference base by two point contact with a rail to be ground, adjustably mounting a plurality of spaced grinders on the base to co-operate with the rail at respective grinding zones in line with said two points, and adjusting the longitudinal spacing between the grinders to shift said grinding zones longitudinally of the two point line to an optimum position dependent on the irregularities of the rail to be trued.
Claim 3
Dependent Claim 20 words
A method as claimed in claim 1 comprising effecting grinding by passing the grinder to and fro on the rail.
Claim 4
Dependent Claim 27 words
A method as claimed in claim 1, wherein the adjustment is made before effecting a run with the grinders, and fixing the grinders at said optimum position.
Claim 5
Dependent Claim 29 words
A method as claimed in claim 1, wherein the adjustments are made during a run with the grinders on the rail in accordance with the shape of the rail.
Claim 6
Dependent Claim 25 words
A method as claimed in claim 1, wherein adjustments are made during a run with the grinders on the rail as a function of time.
Claim 7
Dependent Claim 17 words
A method as claimed in claim 1, wherein adjustments are made in accordance with a predetermined cycle.
Claim 8
Dependent Claim 35 words
A method as claimed in claim 1, wherein for curved rails, the two points of contact and said grind zone are spaced apart to provide a maximum spacing between endmost regions dependent on the curve.
Claim 9
Dependent Claim 24 words
A method as claimed in claim 1, wherein the grinding zones are maintained symmetrically with respect to the mid-point between said two contact points.

References Cited (Backward Citations)

US1340991A Cited
US1923020A Cited
US3358406A Cited
US3509667A Cited
US3738066A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-06-09 1978-12-09 1979-06-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-06-09 1982-12-09 1983-06-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-06-09 1986-12-09 1987-06-10 $7700.00 Window Closed / Lapsed

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