US3712398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically operable device for changing the track width of track-laying vehicles
Assignee: CNH Industrial Baumaschinen GmbH
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Filing: 1971-03-16
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Granted: 1973-01-23
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Expires: 1991-03-16
Abstract
Abstract A track laying vehicle in which the tracks at each side of the vehicle are supported on carriages, with the carriages having spars fixed thereto and extending toward the vehicle and slidably supportingly engaging the vehicle, fluid motors connected between opposed spars are reversibly energizable for moving the carriages between innermost and outermost positions on the vehicle. Wedge shaped abutment elements limit the movement of the spars transversely of the vehicle and a lock is provided for locking each spar in adjusted position.
Inventors
- 👤 E Althaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:04
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/084; E; E02; E02F; E02F9/00; E02F9/02; E02F9/024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
187 words
In a track laying vehicle: a vehicle frame, carriage means at each side of the frame supporting said tracks, spar means fixed to each said carriage means and extending perpendicular to the plane in which the respective track runs and toward the said frame, said frame reciprocably receiving and supportingly engaging said spar means, hydraulic cylinder-piston means extending between said spar means and reversibly energizable for moving said spar means and the carriage means connected thereto laterally of said frame between innermost and outermost positions, and cooperating elements of abutment means on said spar means and said frame interengageable in the said position of said spar means, the abutment elements on each spar means comprising spaced elements on the bottom of the respective spar means and each having the lower side inclined upwardly at the end facing the other thereof, the abutment element on said frame for each spar means comprising an element disposed between the said elements on the respective spar means and having the upper surface inclined downwardly toward each end to cooperate with the inclined surfaces of the said elements on the spar means.
Claim 2
Dependent Claim
187 words
In a track laying vehicle: a vehicle frame, carriage means at each side of the frame supporting said tracks, spar means fixed to each said carriage means and extending perpendicular to the plane in which the respective track runs and toward the said frame, said frame reciprocably receiving and supportingly engaging said spar means, hydraulic cylinder-piston means extending between said spar means and reversibly energizable for moving said spar means and the carriage means connected thereto laterally of said frame between innermost and outermost positions, and cooperating elements of abutment means on said spar means and said frame interengageable in the said position of said spar means, the abutment elements on each spar means comprising spaced elements on the bottom of the respective spar means and each having the lower side inclined upwardly at the end facing the other thereof, the abutment element on said frame for each spar means comprising an element disposed between the said elements on the respective spar means and having the upper surface inclined downwardly toward each end to cooperate with the inclined surfaces of the said elements on the spar means.
Claim 3
Dependent Claim
16 words
A tracking laying vehicle according to claim 1 in which said abutment elements have inclined surfaces.
Claim 4
Dependent Claim
30 words
A track laying vehicle according to claim 1 which includes a source of hydraulic fluid for energizing said hydraulic cylinder-piston means, and pressure limiting valve means connected to said source.
Claim 5
Dependent Claim
100 words
A track laying vehicle according to claim 1 in which said carriage means on each side of the frame comprises a pair of longitudinally spaced carriages, a support frame extending between and fixed to each pair of carriages, said spar means comprising a pair of longitudinally spaced spars fixed to each support frame, the spars on one side of the frame being axially aligned with the spars on the other side of the frame, each cylinder-piston means comprising a cylinder journaled in one spar and a piston journaled in the spar aligned therewith on the other side of the frame.
Claim 6
Dependent Claim
24 words
A track laying vehicle according to claim 1 in which the angle of said inclined surfaces is such that the said elements lock together.
Claim 7
Dependent Claim
129 words
In a track laying vehicle: a vehicle frame, carriage means at each side of the frame supporting said tracks, spar means fixed to each said carriage means and extending perpendicular to the plane in which the respective track runs and toward the said frame, said frame reciprocably receiving and supportingly engaging said spar means, hydraulic cylinder-piston means extending between said spar means and reversibly energizable for moving said spar means and the carriage means connected thereto laterally of said frame between innermost and outermost positions, and cooperating elements of abutment means on said spar means and said frame interengageable in the said position of said spar means, and clamping means operable for clamping each said spar means to the said frame in each adjusted position of said spar means.
Claim 8
Dependent Claim
129 words
In a track laying vehicle: a vehicle frame, carriage means at each side of the frame supporting said tracks, spar means fixed to each said carriage means and extending perpendicular to the plane in which the respective track runs and toward the said frame, said frame reciprocably receiving and supportingly engaging said spar means, hydraulic cylinder-piston means extending between said spar means and reversibly energizable for moving said spar means and the carriage means connected thereto laterally of said frame between innermost and outermost positions, and cooperating elements of abutment means on said spar means and said frame interengageable in the said position of said spar means, and clamping means operable for clamping each said spar means to the said frame in each adjusted position of said spar means.
Claim 9
Dependent Claim
40 words
A track laying vehicle according to claim 6 in which each clamping means comprises a box-like support connected to said frame, a clamp member in said support engageable with one of the said elements on the respective said spar means.
Claim 10
Dependent Claim
34 words
A track laying vehicle according to claim 7 in which said support is pivotal on Said frame and said clamp member engages the same said element in each position of the respective spar means.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |