Land vehicles – Wheeled – Running gear
Patent
1986-11-07
1987-11-17
Love, John J.
Land vehicles
Wheeled
Running gear
267 31, 280678, 280683, 280712, 280DIG1, 280 6R, B60G 504, B60G 1146
Patent
active
047069880
ABSTRACT:
A spring support system for tandem axles that supports the adjacent ends of the springs which support the front and rear tandem axles in the center and automatically adjusts the level of the trailer as load changes by having inflatable air bags that support a movable cross beam relative to the trailer frame. The spring ends are mounted on the movable cross beam. Air bags are inflated at a pressure that is automatically adjusted to be proportional to the load on the trailer. The air bags provide an air cushion support for smoother and more trouble free operation. The movement is guided adequately so that the support is very stable, by automatically adjusting the stiffness of the pneumatic bags which compensate for differing loads.
REFERENCES:
patent: 2771303 (1956-11-01), Frazier
patent: 2790650 (1957-04-01), Boschi
patent: 3014735 (1961-12-01), Lich
patent: 3224522 (1965-12-01), Fleming
patent: 3233915 (1966-02-01), Hamlet
patent: 3309107 (1967-03-01), Chieger
patent: 3499660 (1970-03-01), Raidel
patent: 3692325 (1972-09-01), Gouirand
patent: 3762487 (1973-10-01), Bilas
patent: 3799562 (1974-03-01), Hinchliff
patent: 4009873 (1977-03-01), Sweet et al.
patent: 4099740 (1978-07-01), McGee
Love John J.
Rice Kenneth R.
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