Class 5/233 - Marginal spring tension

Subclass of Class 5 - Beds
Definition: Devices arranged to exert outward marginal pull upon the
No. of patents: 4
Last issue date: 12/23/1986

Number	Title	Issue Date
4630816	Jogging apparatus A jogging apparatus comprising a tubular frame, an elastomeric member bonded to the frame and a mat bonded to the elastomeric member when the elastomeric member is preloaded radially inwardly so that when the load on the elastomeric member is released, th...	12/23/1986
4452444	Rebound exerciser A rebound exerciser for use by an individual in performing a variety of exercises having a frame formed of two symmetrical sections, and a fexible, resilient mat secured to the frame by a plurality of coil springs. The two symmetrical sections are pivotal...	06/05/1984
4284271	Hexagonal jogging platform A hexagonal jogging platform having a tubular support frame with rounded corners, detachable, tubular support legs at each corner and a fabric platform attached to the tubular frame by novel coil springs having hooked ends bent from the axial center of th...	08/18/1981
4162063	Adjustable springs for trampolines and the like The typical helical springs used to support the bed within the frame of a trampoline or the like are modified to incorporate adjustable hooks threadedly anchored within the springs at one end so that their overall length, and thus the tension on the bed, ...	07/24/1979

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