초록 ▼

A machine for rehabilitating and exercising the lower back. The machine includes a stationary seat having an adjustably positioned footrest, and a pivotally mounted seatback. The seatback has adjustably positioned handgrips and a dead man switch. A motorized hydraulic system moves the seatback to in

A machine for rehabilitating and exercising the lower back. The machine includes a stationary seat having an adjustably positioned footrest, and a pivotally mounted seatback. The seatback has adjustably positioned handgrips and a dead man switch. A motorized hydraulic system moves the seatback to incline forwardly from the vertical, and to return to the vertical. The degree of pivot is adjustable. A pelvic restraint secures the user'sbody in operative position, so that all work must be performed by the back. A strain gauge provides an input to a microprocessor, which in turn activates a display indicating effort. The hydraulic system is powered so as to move the body either in the absence of muscular resistance and in the presence of even maximal resistance.

대표청구항 ▼

[ I claim:] [1.] A conditioning machine for the lower back, comprising:a frame including a base for supporting said conditioning machine on a horizontal surface;a seat assembly fixed to said frame, having means for supporting the pelvis and legs of a user in a fixed, seated position;a seatback assem

[ I claim:] [1.] A conditioning machine for the lower back, comprising:a frame including a base for supporting said conditioning machine on a horizontal surface;a seat assembly fixed to said frame, having means for supporting the pelvis and legs of a user in a fixed, seated position;a seatback assembly having powered drive means connected to said seatback assembly, for compelling the torso of the user to incline pivotally in a forward direction from a vertical seated position regardless of resistance applied by the user, said drive means having a motor operably connected to said drive means, said motor having means for developing force greater than that of a person, whereby said drive means compels a person resisting said seatback assembly to incline forwardly regardless of effort of resistance by the person,said seatback assembly having a horizontal axis of pivot, said seatback assembly further comprising anchoring means for anchoring said seatback assembly to said seat assembly pivotally about said horizontal axis, and for constraining said seatback assembly to pivot relative to said seat assembly in a vertical plane,said seatback assembly further comprising a right handgrip solidly fixed to said seatback assembly and a left handgrip solidly fixed to said seatback assembly, whereby a user's arms and hands may be supported in a constant position relative to the user's torso when using said conditioning machine,said drive means comprising a hydraulic power circuit having a double acting hydraulic servo powered by said motor and fluid conduits conducting fluid flowing within said hydraulic power circuit, said drive means further comprising drive control means for independently adjusting upper and lower limits of motion as said seat assembly pivots about said horizontal axis, said controls operating by interference between relatively moving components of said conditioning machine, and means for adjusting angular limits of arcuate motion of said seatback assembly relative to said seat assembly, comprising a reversing switch having a trip bar and mounted to said seatback assembly, and a first stop and a second stop each adjustably and independently mounted to said frame and disposed to contact said trip bar of said reversing switch during inclination of said seatback assembly and to generate a signal for reversing said motor, said first stop contacting said trip bar at one end of arcuate motion of said seatback assembly and said second stop contacting said trip bar at the other end of arcuate motion of said seatback assembly, said conditioning machine further having circuitry for transmitting said signal to said motor.