Adjustable stroke mechanism for a scotch yoke assembly

摘要

A scotch yoke mechanism (12) for converting rotational movement into reciprocating linear movement and having an adjustable stroke length. The scotch yoke mechanism includes a stroke length toggle (30) eccentrically connected to a cam (26) such that the stroke length toggle (30) may assume one of first and second positions. The first position defines a first stroke length which is shorter than a second stroke length defined by said second position. Rotational movement of the cam (26) causes the stroke length toggle (30) to assume the first position when the cam is rotated in a first direction to assume the second position when the cam is rotated in a second direction opposite the first direction.