Hydraulic/pneumatic suspension system for snowmobiles

Details Hydraulic/pneumatic suspension system for snowmobiles Hydraulic/pneumatic suspension system for snowmobiles

1980-01-02

1982-08-17

Song, Robert R.

Land vehicles

Runner vehicle

Occupant steered

188269, 188317, 267 6426, 18832111, 18832241, B62B 1300

Patent

active

043446370

ABSTRACT:
Preferably, a ski or like member contacting the ground suspends a snowmobile frame or chassis via vertical telescoping tubes defining a variable volume chamber. A hollow piston rod fixed to an end cap at one end of one of the telescoping tubes bears at its opposite end and slidable within the other cylinder, a damping piston. The damping piston bears a plurality of orifices for permitting restricted flow of hydraulic liquid to opposite sides of the piston and between chamber sections separated by the damping piston. The hollow rod opens at the end bearing the piston, directly to one chamber section, and bars at least one radial port adjacent its opposite end opening to the other chamber section with the port being closed off by an expandable O-ring functioning as a check valve. A given mass of hydraulic fluid is supplied to the chamber, and the chamber is gas pressurized. The pneumatic/hydraulic suspension system may be employed for supporting the snowmobile skis and may incorporate a steering mechanism as an element of the assembly.

REFERENCES:
patent: 1189953 (1916-07-01), Hyne
patent: 2393559 (1946-01-01), Pappas
patent: 3006628 (1961-10-01), Utting
patent: 3425707 (1969-04-01), Horiuchi et al.
patent: 3659684 (1972-05-01), Porter
patent: 3726419 (1973-04-01), Anderson et al.
patent: 3931862 (1976-01-01), Cote

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