FIELD OF THE INVENTION 
     This invention relates to a multipurpose hand puller, in particular, it can be used individually or in combination as the player desires. 
     BACKGROUND OF THE INVENTION 
     Most universal gyms consist of many body-building mechanisms to train players in arms, waist and legs. In general, each mechanism is composed of a plurality of metal weighs linked with a control steel rope and retaining pin to produce an up-down movement. However, to suit the individual capability, the player has to adjust the number of weighs with great care, or it would render sports injury. Under this circumstance, certain amount of weighs are never used since purchased; the extra number of weighs are a big waste. In addition, it is easy to lead to occasional injury when the player handles the weigh adjustment carelessly. 
     The universal gym has an inherent deadlock, which is hard to break through. The inventor has dealt with production and sale of such sports good for years and have been dedicated to the study for improvement and finally come up with this multipurpose hand puller. 
     SUMMARY OF THE INVENTION 
     The main purpose of the invention is to provide a multipurpose hand puller. With delicate design and combined manipulation of handgrip and operation lever, it can produce diversified exercises. It occupies the least space and gains the maximum benefit. 
     The invention is explained in great details with the aid of preferable embodiments as illustrated in the attached drawings. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     FIG. 1 is a stereo view of the hand puller of the invention. 
     FIG. 2 is a disassembly of the hand puller of the invention. 
     FIG. 3 is a composition of the operation lever of the hand puller of the invention. 
     FIG. 4 is a vertical cross section of the casing of the hand puller of the invention. 
     FIG. 5 show a casing as shown in FIG. 4 is in operation 
     FIG. 6 is a horizontal cross section of the casing of the hand puller of the invention. 
     FIG. 7 shows another embodiment of the hand puller of the invention. 
     FIG. 8 is an operation diagram of the hand puller of the invention (1) 
     FIG. 9 is an operation diagram of the hand puller of the invention (2) 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in FIGS. 1 and 2, the multipurpose hand puller mainly comprises at least one set of hand puller including a pedal  2  and a handgrip  6 . Each set of puller embraces a casing  1 , a brake mechanism  3 , a sheave  4  and a section of pulling rope  5 . The casing  1  is composed of two half shells to be mounted with the brake mechanism  3 , sheave  4  and pulling rope  5  within. At the lower right corner, there is a lock hole  11 , allowing a lock rod  14  to go through and lock the two shells together. The casing  1  has an opening  13  and rope outlet  19  from which the pulling rope  5  extends out of the casing  1 . The opening  13  permits the insertion of a compression knob  15  with a screw section  151  and the stiffening washer  152 . The screw section  151  contacts the worm rod  161 , which is clamped between two mobile brackets  16 . The bracket  16  is adjusted to obtain a proper working angle by turning the compression knob  15 . The rope reel  17  and reel axle  18  are fastened in the casing  1  so allowing the pulling rope  5  to extend outside of the casing  1 . 
     The brake mechanism  3  comprises a brake drum  31 , brake lining  32 , a handbrake lever  33 , a threaded rod  34  and a lock nut  35 . The brake mechanism  3  is a stepless load device. A connecting rod  9  is used to link and fasten the brake drum  31 , the sheave  4 , and the gear  44  together in the casing  1 . The brake lining  32  has one end fixed on the reel axle  18  and other end linked to mobile bracket  16 . Turning the compression knob  15  and adjusting the angle of the mobile bracket  16  are to loosen or to tighten friction force applied by the brake lining  32  on the brake drum  31  as shown in FIG.  6 . When the friction increases, more resistance the brake drum  31  is encountered, and more load is added to the sheave  4 . 
     The sheave  4  is wound with pulling rope  5  on its outer perimeter, loaded with a torque spring  43  and gear  44  on one side and a ratchet house  41  on other side to receive ratchet  42  and ratchet spring  421 . The gear  44  closely contacts the threaded rod  34  of the brake mechanism  3 . 
     The threaded rod  34  is sleeved with spring  341  and contacts with the handbrake lever  33  outside of the casing  1 . When the handbrake lever  33  is turned upward, the cam  331  will push the threaded rod  34  forward so as to disengage the lock nut  35 . 
     As shown in FIGS. 4 through 6, when the compression knob  15  is screwed inward, the brake drum  31  produces considerable resistance imposed on the sheave  4 , that means it requires more strength to pull the pulling rope  5 . In addition, the torque spring  43  also brings forth extra load to the sheave  4  too. After the force to pull the pulling rope  5  is released, the recoil force of the torque spring  43  will return the shave  4 . Because the ratchet  42  permits one direction movement, which will keep the brake drum  31  and the brake lining  32  still, but the torque spring  43  will force the pulling rope  5  and the handgrip  6  backward to original position ready for the next pulling. All the components are housed in the casing  1  and to set up proper resistance and load is simply by turning the compression knob  15  as the player desires. 
     As shown in FIGS. 1 through 3, the player can stand on two pedals  2  and hold two handgrips  6  with two hands to start pulling exercise. Besides, there is another embodiment where a control rod  7  is linked with roller  71  and hook  72 , which is directly connected to the pulling rope  5 . At this moment, the player is allowed to knee down on the pedals  2  and practice the forward and backward movement. In this case, if necessary, an extension band  8  will be added to get sufficient length of the puller. 
     As shown in FIGS. 8 and 9, it allows the player to stand on the pedal  2  and hold the handgrips  6  to practice the pulling rope  5 , or to knee down on the pedals  2  with two hands gripping the control rod  7  so as to stretch his body. The puller can be hanged on the wall or column with the pulling rope  5 , so the player can hold the handle  12  on the casing  1  to have similar effect. The design of the hand puller is actually multi-functional, which meets user&#39;s need adequately.
A multipurpose hand puller mainly comprises at least one set of hand pullers, pedals, handgrips and operation levers, in which each set of the puller consists of a casing, brake mechanism, sheave and pulling rope. The delicately designed structure and diverse manipulation of a handgrip and operation lever provide a great number of combination and multipurpose exercises with least space occupied and maximum benefit achieved.