Abstract: A valve assembly mounted in the head of an internal combustion engine. The valve is driven on the stem thereof in an arcuate motion so that the valve does not oscillate along its longitudinal axis, but instead swings slightly away from its longitudinal axis during each reciprocation. The valve is preferably driven not only downwardly, but also upwardly to permit a high rate of oscillation.

Abstract: A mounting structure especially for electric outboard trolling motors that allows the motor and its supporting structure to pivot over a wide range if a submerged object is struck by the submerged motor. The mounting structure permits this release regardless of whether the boat is moving forward or in reverse. After the submerged object is passed, the mounting structure will automatically reset itself to the normal operating position.

Abstract: A quick release assembly for electric troller motors of the type having a motor-propeller assembly supported at the lower end of a vertical motor tube and control and starting functions supported on the tube at the upper end. The motor tube is held in a swivel bracket that in turn is operatively connected to the mounting bracket secured to the bow or transom of the boat. A quick release pin provides one pivot for the connection between the swivel bracket and the mounting bracket, while a thrust pin provides the other connection with a moveable retainer plate allowing quick release of the swivel bracket from the mounting bracket after the quick release pivot pin is removed.