Pneumatic lift control device

Pneumatic lift control devices for use in progressively controlling the amount of front end lift of an automobile during acceleration comprise a housing having an annular chamber disposed therein. A piston is slidable disposed axially within the annular chamber. Means are provided for retaining the piston within the annular chamber. A pressure-tight seal is formed between the piston and the annular chamber to enable pneumatic pressurizing of the claimer, and to prevent pressure loss from the chamber during slidable movement of the piston. A snubber is disposed within the annular chamber between the piston and a portion of the housing to resist axial displacement of the piston within the chamber. The snubber is formed from an elastically deformable material that, with the pressurized chamber, provides a progressive resistance to piston axial displacement. The piston is adapted to accommodate attachment with a first structural member, and means are provided to connect the housing to a second structural member to facilitate placement of the device therebetween. When placed between first and second structural members of a lift control frame structure that are subjected to compression or tension forces during conditions of maximum acceleration, the pressurized chamber and snubber together act to progressively resist axial displacement of the piston within the housing, thereby providing a progressive rate of lift control that minimizes or eliminates unloading of the rear wheels.