Patent ID: 7837636

Claim:
A transmission device for transforming an alternate rotational movement into a substantially linear reciprocating movement, comprising: a first element operable to alternately rotate in opposite first and second directions; a second element coupled to the first element and operable to move linearly in a first direction responsive to rotation of the first element in the first direction and to move linearly in a second direction responsive to rotation of the first element in the second direction; a first pivoting element having first and second legs, and having a first fixed pivot point located at a junction between the first and second legs, the first leg being pivotally connected to the second element at a location spaced from the first fixed pivot point, the first pivoting element being operable to pivot in opposite directions about the first fixed pivot point responsive to linear movement of the second element in the first and second directions, respectively; a second pivoting element pivotally connected to the second leg of the first pivoting element at a location spaced from the first fixed pivot point and being operable to move in opposite directions responsive to pivotal movement of the first pivoting element in opposite directions; a third pivoting element pivotally connected to the second pivoting element and having a second fixed pivot point about which the third pivoting element pivots; and a ball member secured to the second pivoting element, the ball member undergoing reciprocal movement responsive to the pivotal movement of the first pivoting element in opposite directions.