Wheel substitutes for land vehicles – Combined or convertible
Patent
1974-09-19
1976-02-17
Goodman, Philip
Wheel substitutes for land vehicles
Combined or convertible
213 43, B62D 5530
Patent
active
039388514
ABSTRACT:
A tractor recoil mechanism for maintaining tension of the track includes a cylinder having a sleeve piston movably disposed therein, associated with a rear frame portion. A rod member, disposed within the sleeve piston to form therewith a closed chamber with the cylinder means, extends through an open end of the cylinder means. A helical spring acts between the sleeve piston and reaction means associated with a front frame portion to urge them apart. Recoil movement of the front portion in one direction relative to the rear portion moves the rod therewith, so that, with the chamber filled with incompressible fluid, the sleeve piston moves in the opposite direction relative to the cylinder means, with compressive movement of the helical spring being greater than the amount of movement of the front portion toward the rear portion. Vent means associated with the chamber allow introduction of substantially incompressible fluid therein while air may be properly vented therefrom.
REFERENCES:
patent: 3456764 (1969-07-01), Myers
patent: 3525449 (1970-08-01), Zanon
patent: 3645586 (1972-02-01), Piepho
patent: 3692368 (1972-09-01), Alexander
patent: 3792910 (1974-02-01), Kaufman
patent: 3829172 (1974-08-01), Oestmann
Oestmann Eldon D.
Shelby Robert L.
Carroll John A.
Caterpillar Tractor Co.
Goodman Philip
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