Exercising apparatus
BACKGROUND OF THE INVENTION 
     This invention pertains to exercising devices. Many devices of such generic nature have been previously disclosed which purport to enhance the exercise routine. There are devices which provide a restrictive flow of fluids from one side to the other of a piston and cylinder arrangement, such as in U.S. Pat. Nos. 3,912,265 or 3,822,599, and pump-like devices are shown in U.S. Pat. Nos. 2,066,578 and 3,369,403. Push-pull isokinetic devices are shown in U.S. Pat. Nos. 4,148,479 and 3,834,696. Cables and pulleys are associated with a hydraulic metering device in U.S. Pat. Nos. 3,984,102 and 3,387,843. 
     SUMMARY OF THE INVENTION 
     This invention pertains to a device incorporating a hydraulic resistance in conjunction with a novel arrangement of pulleys and cables which are arranged to be pulled in line with the resistance to maximize the stretch required to pull the mechanism to its full extent while maintaining the assembly in compact form. 
     Another object is to provide a novel mechanism which provides controllable resistance for exercise movements from very slight to extremely heavy. 
     A further object is to devise a novel apparatus in which the resisting mechanism is coupled to an in line cable and pulley system which serves as a leverage and extends the stroke length of the apparatus to accommodate extensive body movements of the user. 
    
    
     These and other objects and advantages inherent in and encompassed by the invention will become more apparent in the specification and drawings, wherein: 
     FIG. 1 is a perspective view of the novel apparatus partly in section, and 
     FIG. 2 is a side elevational view partly in section. 
    
    
     DESCRIPTION OF THE INVENTION 
     Referring to the drawings, there is shown an exercising device designated 2 comprising a frame 3 which includes a pair of longitudinal slide bars 4,4 the ends of which are secured to top and bottom plates 5 and 6 for holding them in axial alignment and a predetermined distance apart. 
     A guide plate 8 is positioned intermediate plates 5 and 6 and has a pair of guide apertues 10,10 through which the bars 4,4 extend. 
     The bottom plate 6 is positioned adjacent to the lower closed end 12 of a hydraulic cylinder 14 or a resistance generally designated 15. The upper end of the cylinder 14 is fitted with a gland element 16 which is secured to the intermediate guide plate 8 centrally thereof. 
     A piston 18 is fitted within the cylinder and is connected to intermediate the ends of a piston rod 20 which extends through the gland 16 in fluid-tight fit therewith. The upper end 24 of the rod is connected to the upper end plate 5 and the lower end of the rod extends through a gland 26 on the lower end of cylinder 14. The lower end of the rod is connected to the base plate 6. 
     A cable and pulley system 30 is provided to operate the mechanism. The system 30 comprises a cable 32 secured at its ends as at 33 and 34 at diametrically opposite sides of the piston-cylinder resistance to the guide plate 8. The cable has first lengths 35,36 extending from its ends axially of the device. The lengths 35,36 have their upper ends trained over pulleys 38,40 which are positioned in slots 42,44 in plate 5 and mounted on journals 46,48 secured to plate 5 and extending normal to the longitudinal axis of the device. The cable or cord 32 has a second set of lengths 50,52 extending axially of the device from end plate 5 toward plate 8 and are trained under pulley wheels 54,56 positioned within slots 58,60 in plate 8 at diametrically opposite sides of the resistor on journals 62,64 positioned normal to the axis of the device and secured to the plate 8. 
     The cord has third lengths 66,68 extending axially of the device through antifriction guides 70,72 mounted in top plate 5 at diametrically opposite sides thereof and the cord lengths 66,68 are joined by a cross length 74 which extends through a handle 75 disposed diametrically of the device. 
     The bottom plate is connected to a strip or stirrup 76 which accommodates the user&#39;s foot or shoe while the user pulls on the handle against the force of the resistance which comprises a suitable non-staining hydraulic fluid 78 completelly filling the upper and lower chambers 79,80 above and below the piston. 
     Of course, the stirrup may be replaced by a cord or other securing device so that it may be anchored to any stationary structure. 
     As the cable is pulled by the handle while the stirrup is held stationary, the fluid is ported from the upper cylinder chamber 79 through a conduit 82 and adjustable throttle valve 84 to the lower chamber 80. 
     Upon release of the handle, the pair of springs 86,88, which are positioned parallel to the cylinder, and are connected at their upper and lower ends to anchors 89,90 and 91,92 respectively provided on bottom plate 6 and intermediate plate 8, and have been extended will retract and pull the plate 8 toward plate 5 and consequently the cylinder also, whereupon the fluid which had been forced into the lower cylinder chamber will now flow back via a one way valve 95 in the line 82 thus completing the cycle. 
     It will be understood that a commercially well known counterbalance valve may be incorporated in the valve system such as shown in the subject brochure of the Industrial Hydraulic Division of Parker Fluidpower located in Elyria, Ohio to regulate the flow of the fluid more evenly.