Device for propelling a projectile

An archery bow, comprising:

• a riser;
• a hand grip adjustably affixed to said riser;
• at least one spring assembly operatively connected to said riser, said spring assembly including a spring and a rotating member operatively associated therewith;
• a bowstring operatively associated with said spring assembly such that each end of the bowstring is attached to the rotating member;
• an arrow releasably attached to said bowstring;
• and
• a pair of engaged spring cranks releasably connected to said spring assembly to energize said assembly and rotate said rotating member in a first direction, where upon release of energy stored in said spring said rotating member rotates in a second direction, opposite the first direction and independent of said spring cranks, applying increased tension to the bowstring and launching the arrow.

A method for drawing and releasing a bow to propel an arrow, comprising:

• applying a linear drawing force to move a pair of engaged spring cranks, at least one of the cranks being releasably connected to a spring assembly, to energize said spring assembly by rotating a member attached to said spring assembly in a first radial direction;
• concurrently drawing a bowstring, with an arrow nocked thereto, said bowstring having each end thereof attached to the member;
• decoupling the spring assembly from the spring crank;
• and
• releasing energy stored in said spring wherein said member rotates in a second direction, opposite the first direction, and said bowstring propels the arrow.