Exercise devices – User manipulated force resisting apparatus – component... – Utilizing resilient force resistance
Patent
1992-09-22
1993-07-06
Crow, Stephen R.
Exercise devices
User manipulated force resisting apparatus, component...
Utilizing resilient force resistance
482140, A63B 21045, A63B 7100
Patent
active
052249140
ABSTRACT:
A portable exercise device for exercising muscles in the abdomen and torso formed of a pair of upper legs and a pair of lower legs connected by a resilient device effective to resist pressure applied by a user to superimpose the respective upper and lower legs, the upper legs being connected to a transverse bar selectively supporting handles or pads and including a centrally located recessed portion. The lower legs are connected to a transverse board which may have padding to ease engagement with a user's legs. The resilient device selectively includes torsion springs, hydraulic cylinders, resilient rubberlike material, and plates formed of spring steel. In one embodiment the transverse bar and transverse board are each formed of longitudinal molded plastic halves having internal strengthening ribs, and grooves to clamp the upper and lower legs between the halves when the halves are secured together in clam shell-like fashion. Alternatively, the transverse bar and board are formed of plastic with the upper and lower legs embedded in the plastic. In still another embodiment transverse bar and board are omitted and the upper and lower legs are encased in soft foam rubber. The torsion springs, upper legs, lower legs, and a connecting portion between said lower legs may be integrally formed from spring steel.
REFERENCES:
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patent: 4314697 (1982-02-01), Brumfield et al.
patent: 4603858 (1986-08-01), Reehil
patent: 4775148 (1988-10-01), McLaughlin
patent: 4807873 (1989-02-01), Naquin
patent: 5007632 (1991-04-01), Wilkinson
patent: 5031906 (1991-07-01), Jang
patent: 5176622 (1993-01-01), Anderson et al.
Crow Stephen R.
Litman Richard C.
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