Patent ID: 7188615

Claim:
A adjustable cam for a crossbow, the adjustable cam comprising: a main disk ( 20 ) having two sides; a group of string hooks (I) formed on one side of the main disk; a group of weight-selecting holes (II) defined through the main disk ( 20 ); and a group of length-selecting holes (III) defined through the main disk; a weight-adjusting block ( 40 ) pivotally mounted on the other side of the main disk ( 20 ) and having an engaging end 44 selectively engageable in any of the weight-selecting holes (II); and a length-adjusting block ( 30 ) pivotally and coaxially mounted between the weight-adjusting block ( 40 ) and the main disk ( 20 ) and having an engaging end ( 34 ) selectively engageable in any of the length-selecting holes (III).