Motor vehicles – Special driving device – Portable track
Patent
1987-09-16
1988-10-18
Pekar, John A.
Motor vehicles
Special driving device
Portable track
305 16, 305 34, B62D 55247
Patent
active
047780193
ABSTRACT:
A sealed, air-containing vehicle suspension assembly. The assembly includes an endless track unit trained over a pair of wheel units each supported by the end portion of an axle, a pair of side plates, and a pair of dynamic seal assemblies. The dynamic seal assemblies each include a diaphragm portion with its outer margin secured to outer margins of the track unit and its inner margin carried by support units extending inwardly from the track. The primary seal unit has a tubular cross section and its inner sidewall affixed to the inner diaphragm margin. A part of the primary seal outer sidewall has a smooth sidewall sealing surfaces which engages an inwardly facing surface of its associated end plate along a path generally parallel to the travel path of the track. The primary seal unit also includes spaced apart air inlet openings between its sidewall sealing surface and the inner margin along which it is joined to the diaphragm, whereby the air within the support seal assembly may enter the primary seal unit to maintain an inflation and sealing pressure.
REFERENCES:
patent: 3427078 (1969-02-01), Parsons
patent: 4283094 (1981-08-01), Bertelsen
patent: 4530545 (1985-07-01), Bertelsen
Fitzgibbon James T.
Pekar John A.
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