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Vehicle control safety system

  • US 4,566,555 A
  • Filed: 02/13/1984
  • Issued: 01/28/1986
  • Est. Priority Date: 02/13/1984
  • Status: Expired due to Fees
First Claim
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1. A safety system for a vehicle having a chassis with two parallel substantially horizontal spaced-apart lower chassis frame extension legs and two parallel substantially horizontal spaced-apart upper chassis frame extension legs associated with the front and rear ends of said vehicle and an axle assembly for each of the wheels, comprising:

  • a suspension assembly for each axle assembly including a cylinder and an air piston normally movable in said cylinder, said cylinder being pivotably coupled to said chassis and said air piston being pivotably coupled to said axle assembly, said cylinder being formed with at least one air port opening;

    valve means for selectively opening and closing said at least one air port opening so as to arrest the movement of said air piston in said cylinder, and to maintain said piston in a relatively rigid, non-compressible state when said air port opening is closed, including biasing means urging said valve means to open said air port opening;

    means for activating the closing of said valve means; and

    at least one bumper assembly including a short stroke retractable bumper slidably mounted on said chassis for movement between a normal, extended position and a retracted position, by means of a first pair of generally parallel, spaced-apart hollow support arms, each of which being mounted to one of said lower chassis frame extension legs and a second pair of generally parallel, spaced-apart hollow support arms, each of which being mounted to one of said upper chassis frame extension legs, and a pair of lower and a pair of upper generally parallel, spaced-apart rods connected to said bumper, each of which being telescopically received in a corresponding one of said hollow support arms.

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