Crossbow

Abstract

A crossbow has a body, a bow, two pulley assemblies, and a string. The bow is resilient, is mounted on a front end of the body, and has two limbs extending respectively toward two sides of the body. The pulley assemblies are mounted respectively on free ends of the two limbs. Each roller assembly has a string pulley, an idle wheel, and a cable. The cable has a front end connected securely with the front end of the body and a rear end mounted around the idle wheel of the pulley assembly and the string pulley of the other pulley assembly and securely connected with the string pulley of the other pulley assembly. The string is mounted around the string pulleys of the pulley assemblies and has two ends connected securely with the string pulleys of the pulley assemblies.

What is claimed is: 
     
         1 . A crossbow comprising:
 a body having a front end and a rear end;   a bow being resilient, mounted on the front end of the body, and comprising   two limbs extending respectively toward two sides of the body, and each limb having a free end away from the body;   two pulley assemblies mounted respectively on the free ends of the two limbs, and each pulley assembly comprising   a string pulley mounted rotatably on the free end of a corresponding one of the limbs;   an idle wheel mounted rotatably on the free end of the corresponding one of the limbs;   a cable having a front end connected securely with the front end of the body and a rear end mounted around the idle wheel of the pulley assembly and the string pulley of the other one of the pulley assemblies and securely connected with the string pulley of the other one of the pulley assemblies; and   a string mounted around the string pulleys of the pulley assemblies and having two ends connected securely with the string pulleys of the pulley assemblies.   
     
     
         2 . The crossbow as claimed in  claim 1 , wherein
 the body has a bow mount mounted on the front end of the body; and   each pulley assembly further comprises a cable mount mounted on a side of the bow mount facing the rear end of the body, wherein the front end of the cable of the pulley assembly is connected securely with the cable mount.   
     
     
         3 . The crossbow as claimed in  claim 2 , wherein the cable mount of each pulley assembly has an annular groove formed around the cable mount; and
 the front end of the cable of each pulley assembly is mounted in and around the annular groove in the cable mount of the pulley assembly.   
     
     
         4 . The crossbow as claimed in  claim 3 , wherein the string pulley and the idle wheel of each pulley assembly are co-axially connected with each other. 
     
     
         5 . The crossbow as claimed in  claim 4 , wherein each pulley assembly further has an axle around which the string pulley and the idle wheel of the pulley assembly is mounted. 
     
     
         6 . The crossbow as claimed in  claim 5 , wherein each limb comprises two resilient arm elements connected securely with the bow mount with a fastener. 
     
     
         7 . The crossbow as claimed in  claim 6 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         8 . The crossbow as claimed in  claim 5 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         9 . The crossbow as claimed in  claim 4 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         10 . The crossbow as claimed in  claim 3 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         11 . The crossbow as claimed in  claim 2 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         12 . The crossbow as claimed in  claim 1 , wherein the idle wheel of each pulley assembly has a cable groove formed around the idle wheel; and
 the cable of each pulley assembly is mounted in the cable groove in the idle wheel of the pulley assembly.   
     
     
         13 . The crossbow as claimed in  claim 1 , wherein the string pulley and the idle wheel of each pulley assembly are co-axially connected with each other. 
     
     
         14 . The crossbow as claimed in  claim 1 , wherein each pulley assembly further has an axle around which the string pulley and the idle wheel of the pulley assembly is mounted. 
     
     
         15 . The crossbow as claimed in  claim 1 , wherein each limb comprises two resilient arm elements connected securely with the bow mount with a fastener.