US4050196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail grinding machine
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
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Filing: 1976-10-22
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Granted: 1977-09-27
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Expires: 1996-10-22
Abstract
Abstract A mobile rail grinding machine for grinding the running surface and inside of the railhead of the track rails comprises a forward, an intermediate and a rear grinding module spacedly arranged in an operating direction. The forward and rear modules each includes a carrier associated with each running surface half of each rail, a power drive for vertically moving the carriers, and two grinding wheels spaced on each carrier in the operating direction, each of the wheels having a circumferential grinding surface for grinding the associated running surface half. Flanged wheels guide each grinding module along the track rails. The intermediate grinding module has a carrier associated with each track rail, a power drive for moving the carriers parallel with respect to the track, and at least one grinding wheel on each carrier associated with the inside of the railhead of the associated rail for grinding the associated inside. Shaping tools are mounted on the carriers for profiling the grinding surfaces of the grinding wheels. At least the forward and rear modules are centered with respect to the track rails and their flanged wheels are pressed without play against the track rails they engage.
Inventors
- 👤 Josef Theurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:38
CPC Classifications
E; E01; E01B; E01B31/00; E01B31/02; E01B31/12; E01B31/17
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
225 words
A mobile rail grinding machine for grinding the running surface and inside of the railhead of track rails, each track rail having a vertical plane of symmetry and respective halves of the running surface on each side of the plane of symmetry, comprising 1. a forward and a rear grinding module spacedly arranged in an operating direction, each of the grinding modules including a. a carrier associated with each running surface half of each of the track rails, b. power-driven means for moving the carriers, c. two rotatable grinding wheels on each carrier associated with respective ones of the running surface halves, the grinding wheels being spaced in the operating direction and each of the wheels having a circumferential grinding surface arranged for grinding the associated running surface half of the railhead of the associated track rail, and d. track rail engaging elements guiding each grinding module along the track rails; 2. an intermediate grinding module arranged between the forward and rear grinding modules, the intermediate grinding module including a. a carrier associated with each of the track rails, b. at least one grinding wheel on each carrier associated with the inside of the railhead of the associated track rail for grinding the associated inside, and c. power-driven means for moving the grinding wheels of the intermediate grinding module parallel with respect to the track;
Claim 2
Dependent Claim
225 words
A mobile rail grinding machine for grinding the running surface and inside of the railhead of track rails, each track rail having a vertical plane of symmetry and respective halves of the running surface on each side of the plane of symmetry, comprising 1. a forward and a rear grinding module spacedly arranged in an operating direction, each of the grinding modules including a. a carrier associated with each running surface half of each of the track rails, b. power-driven means for moving the carriers, c. two rotatable grinding wheels on each carrier associated with respective ones of the running surface halves, the grinding wheels being spaced in the operating direction and each of the wheels having a circumferential grinding surface arranged for grinding the associated running surface half of the railhead of the associated track rail, and d. track rail engaging elements guiding each grinding module along the track rails; 2. an intermediate grinding module arranged between the forward and rear grinding modules, the intermediate grinding module including a. a carrier associated with each of the track rails, b. at least one grinding wheel on each carrier associated with the inside of the railhead of the associated track rail for grinding the associated inside, and c. power-driven means for moving the grinding wheels of the intermediate grinding module parallel with respect to the track;
Claim 3
Dependent Claim
47 words
shaping tools on the carriers for profiling the grinding surfaces of the grinding wheels; and 4. means for centering the forward and rear grinding modules with respect to the track rails and for pressing the track rail engaging elements without play against the track rails they engage.
Claim 4
Dependent Claim
47 words
shaping tools on the carriers for profiling the grinding surfaces of the grinding wheels; and 4. means for centering the forward and rear grinding modules with respect to the track rails and for pressing the track rail engaging elements without play against the track rails they engage.
Claim 5
Dependent Claim
52 words
The mobile rail grinding machine of claim 1, wherein the forward and rear grinding modules are frame units on which the carriers are mounted, the track rail engaging elements guiding the frame units along the track rails, and the centering means comprising a lever system acting upon the track rail engaging elements.
Claim 6
Dependent Claim
87 words
The mobile rail grinding machine of claim 1, wherein each forward and rear grinding module is comprised of two frame parts, the carriers associated with each of the track rails being mounted on a respective one of the frame parts and each frame part being guided on the track rails by the track rail engaging elements, and the centering means comprises means for moving the frame parts laterally with respect to each other to press their rail engaging elements into engagement with the associated rail without play.
Claim 7
Dependent Claim
53 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels, and guide means for vertically and transversely movably mounting the grinding wheel supports on the carriers in a plane extending transverse to the operating direction and perpendicularly to a plane defined by the track rails.
Claim 8
Dependent Claim
56 words
The mobile rail grinding machine of claim 4, wherein the guide means for the grinding wheel supports on the intermediate grinding module comprises guide columns for moving the supports laterally in the transverse plane parallel to the plane defined by the track rails, and means for vertically moving the grinding module carriers in the transverse plane.
Claim 9
Dependent Claim
124 words
The mobile rail grinding machine of claim 4, wherein the guide means for the grinding wheel supports on the forward and rear grinding modules comprises guide columns extending obliquely to the plane defined by the track rails in the transverse plane for simultaneously moving the supports transversely, each of the rotatable grinding wheels having an axis of rotation extending obliquely to the plane defined by the track rails and in the transverse plane, the axes of rotation of the grinding wheels associated with respective ones of the running surface halves enclosing an acute angle in the transverse plane and intersecting in the plane of symmetry above the associated track rail, the axes of rotation being symmetrically disposed with respect to the plane of symmetry.
Claim 10
Dependent Claim
94 words
The mobile rail grinding machine of claim 6, wherein each of the grinding wheels on the forward and rear grinding modules has a concave annular grinding surface, the running surface being convexly curved and a common enveloping curve defined by the annular grinding surfaces of the grinding wheels associated with respective ones of the running surface halves conforming to the convex curvature of the running surface, the grinding wheels being transversely adjustable in relation to each other with respect to the associated track rail whereby different shapes are imparted to the common enveloping curve.
Claim 11
Dependent Claim
38 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the rotatable grinding wheels on the forward and rear grinding modules, the supports being movable symmetrically with respect to the plane of symmetry.
Claim 12
Dependent Claim
73 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels on the forward and rear grinding modules, the supports being staggered on the respective carriers associated with each running surface half in the operating direction, and the supports on the carriers associated with one of the track rails being mirror-symmetrically arranged with respect to the supports on the carriers associated with the other track rail.
Claim 13
Dependent Claim
79 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels on the forward and rear grinding modules, the supports on the carriers of the forward grinding module associated with one of the track rails being arranged mirror-symmetrically with respect to the supports on the carriers associated with the other track rail and with respect to the supports on the carriers of the rear grinding module associated with the same track rail.
Claim 14
Dependent Claim
44 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels on the intermediate grinding module, the supports on the carrier associated with respective ones of the track rails being mirror-symmetrically arranged with respect to each other.
Claim 15
Dependent Claim
79 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels on the forward and rear grinding modules, a pair of the supports being mounted on each of the carriers associated with a respective one of the running surface halves, the pairs of supports being staggered from each other in the operating direction, one of the grinding wheels of each pair being positioned between the two grinding wheels of the other pair.
Claim 16
Dependent Claim
132 words
The mobile rail grinding machine of claim 1, wherein the grinding modules are frame units on which the carriers are mounted, the track rail engaging elements are flanged wheels guiding the frame units along the track rails, and the centering means for each grinding module comprises a lever system including a two-armed lever mounted on each frame unit for pivoting about an axis perpendicular to the track, a push rod linked respectively to one of the lever arms and a respective one of the flanged wheels in engagement with a respective one of the track rails, the flanged wheels being mounted for movement transversely of the track rails, and a power drive linked to the lever for pivoting the same and pressing the flanged wheels laterally into engagement with the track rails.
Claim 17
Dependent Claim
20 words
The mobile rail grinding machine of claim 13, wherein the two-armed lever is mounted substantially centrally between the track rails.
Claim 18
Dependent Claim
31 words
The mobile rail grinding machine of claim 1, further comprising a machine frame mounted for mobility on the track rails, the grinding modules being vertically adjustably mounted on the machine frame.
Claim 19
Dependent Claim
104 words
The mobile rail grinding machine of claim 1, further comprising a support for each of the grinding wheels, a hydraulic motor for moving each support in relation to the associated track rail, an electric motor for rotating each of the grinding wheels, a source of electric current for the electric motor, and a control for operating the hydraulic motors of the supports associated with a respective one of the running surface sides of the associated track rail, the control including a servovalve supplying hydraulic fluid to the hydraulic motors in response to the electric current received by the electric motors of the grinding wheels.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |