Title: Vehicle suspension

Abstract: A retractable tag axle assembly, including a hydraulic cylinder for up-and-down reciprocation of the tandem axle, is provided with structure for protecting the cylinder against damage from shock forces imparted to the suspension spring through the ground-engaging wheels. The structure includes a crank secured to one end of the spring and coupled with the hydraulic cylinder at a point intermediate the ends of the spring such that the full length of the latter is available for up-and-down flexure, yet the overall length of the assembly, is not increased over that of conventional tag axle assemblies. Ball-and-socket type mountings between the ends of the cylinder, and the frame and crank respectively, permit canting of the cylinder to avoid the adverse effects of twisting of the crank relative to the frame.

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Inventors: Jackson, William E. (Omaha, NE, US)

Application Number: 813474
Filing Date: 1977-07-07
Publication_date: 1979-01-16
Assignee: Jackson Lift Co., Inc. (Arlington, NE)
Primary Class(es): 280/86.5 267/41
Other Classes:
US Patent Ref:

3860256	Jan, 1975	Jackson	280/81.
4007801	Feb, 1977	Vincent	280/704.
4046402	Sep, 1977	Allison	280/674.
4065153	Dec, 1977	Pringle	280/704.

Other Refs:
Primary Examiner: Peters, Jr., Joseph F.
Assistant Examiner: Carroll, John A.
Attorney: Schmidt, Johnson, Hovey & Williams