A rotary coupler having two housing portions, one housing portion being rotatable with respect to the other housing portion includes two fluid channels including a water channel extending axially the length of the coupler and a slurry channel disposed radially outwardly of the water channel. A flow directing surface is disposed within the rotatable housing portion to direct a slurry of abrasive particles and air through the housing to the outlet in a continuous manner substantially without disru...

An exercising device includes an integrally molded footboard on which an individual may stand and a pair of continuous loop elastic bands attachable to the footboard and being positionable over the user's shoulders, or otherwise used by the individual for exercising purposes. The footboard is provided with a vaulted and ribbed understructure having cavities for frictionally retaining accessories including the elastic bands. Integrally molded cleats are provided at the ends of the board, and the ...

An automatic force generating and control system that automatically sets exercise forces in accordance with user programmed criteria and is capable of providing pressurized flow to both ends of the arm hydraulics and leg exerciser hydraulics. Anticavitation is provided during idling, pressurized flow and when the user is successfully overcoming the pressurized flow. In the preferred embodiment, pressure is regulated by two proportional pressure relief valves which set the pilot pressure of the c...

A portable, stable motorless rope-climbing exercise machine comprises a stable support frame, a plurality of rope pulleys and rope guides mounted on the frame, an endless rope extending around the pulleys and guides to form a path which includes a vertically extending rope climbing portion, and hydraulic braking assembly coupled to the pulley system for controlling the rate of movement of the rope based upon the weight of the user when said user is climbing the rope.

A variable resistance exercise device is provided which enables a user to select from an almost limitless set of resistance curves having various shapes and amplitudes. These results are achieved using a baseline fixed resistance and a variable resistance generated by a torque arm assembly. Preferably, the torque arm assembly has a vertical diametric torque arm and two horizontal radial torque arms which are perpendicular to the vertical torque arm. By varying the position of a weight member on ...

A portable self - contained exercise machine kit is compact and hand transportable. The kit when collapsed forms a rectangular configuration. The kit when assembled comprises a base member, a stanchion member and an exercise arm for performing upper and lower body exercises. The exercise arm is attached to the stanchion. An elongated handle is attached to the exercise arm and a bench member for attachment to the base is also provided in the kit.

A leg extension exercise machine which utilizes a frame-journaled rotating effort arm, which is mechanically linked to a frame-journaled rotating weight arm, which, together with the frame of the machine and the connecting link joining them, form a simple planar double-rocking-lever four-bar linkage, which acts in conjunction with the rotating weight arm to vary the resistive force applied to the operator's leg extending muscles through body-machine contact with the rotating effort arm throughou...

A double functional exercise bike for exercise, training, rehabilation, and human interaction having two chairs, two handle bar frames, and two sets of pedals to provide rotating forces in opposite directions to commonly drive a damping device or generator and having an adjusting device to adjust the tension between driving system elements. The bike also includes at least one operational reaction training device and can include a dynamotor for producing electric power to be used as a driving dev...

Improved multifunction foldable and compact exercise machine which comprises an upright floor and supported mainframe having an overhead bar and also having a bench pivotally attached to it. The mainframe has attached to it at least one exercise station connected to the upper portion of the mainframe. The exercise station connected to the upper portion of the mainframe is interconnected with the exercise station connected to the lower portion of the mainframe. The latter exercise station provide...

A rotary coupling for two different fluids. The coupling includes a fixed housing and hollow shaft mounted rotatably but axially immovably in the housing. The shaft is provided with a central through-flow channel for a first fluid and at least one second through-flow channel parallel thereto for a second fluid. In the housing there are provided two separate supply channels for the two fluids and two sliding ring sealing devices between these channels and the hollow shaft, arranged coaxially with...