Patent ID: 7708123

Claim:
A spring device including an intermittent accumulator and kinetic energy release trigger that gradually winds up to accumulate energy when driven by manual or other intermittent kinetic energy, and that drives a kinetic energy release control to trigger a spring to release kinetic energy to drive a load once the kinetic energy of the spring is accumulated to a preset value, comprising: a spring arranged to accumulate kinetic energy in one direction; an input mechanism connected to the spring and arranged to supply kinetic energy to the spring; a load to be driven by said accumulated kinetic energy when the accumulated kinetic energy is released by the spring; an energy release control clutch device connected to the spring and arranged to prevent said release of accumulated kinetic energy from the spring to the load until a predetermined amount of kinetic energy has been accumulated in the spring, wherein said spring accumulates energy supplied by said input mechanism until said predetermined amount of kinetic energy has been accumulated in said spring, wherein during said accumulation of energy said clutch device prevents said release of accumulated kinetic energy to the load so that none of the input kinetic energy is supplied to the load, and wherein said input kinetic energy is thereafter supplied to the load only after said accumulation of a predetermined amount of kinetic energy to thereby prevent smaller amounts of kinetic energy that would otherwise be wasted from being supplied to the load.