GB940690A - Internal combustion engine connecting rod and piston assemblies - Google Patents

Abstract

940,690. Connecting-rods; pistons. SULZER FRERES S.A. Sept. 28, 1962 [Oct. 4, 1961], No. 36962/62. Heading F2T. A piston 1 is coupled to its connecting-rod 2 so that oscillations of the rod impart a progressive rotary motion to the piston through resilient drive means comprising a split ring 17 having one end operatively connected to the piston and its other end operatively connected to a piston-rotating ring 9 rotated by the rod 2. The spherical end 3 of the rod 2 is housed in bearings 5, 6 spaced by a member 7 in which the ring 9 having internal ratchet teeth 10 is rotatably mounted. A bush 11 in an eccentric bore in the end 3 houses a pair of sliders 12 urged apart by a spring 13 and each having at its outer end a pawl 14 to engage the teeth 10. A pin 20 secured to the ring 7 engages an aperture 18 in one end of the spring ring 17 and a projection 15 on the ring 9 engages a recess 16 at the other end of the ring 17. In operation, pivoting of the rod 2 about the bearing centre Z causes the sliders 12 to move relative to the ring 9 which is thereby rotated and applies a torque to the piston through the spring ring 17. The drive mechanism is protected by providing the pin 20 with a neck 22 which shears if the resistance to rotation of the piston is excessive. In a modification, Fig. 6 (not shown), the ring 17 has bevelled ends and the pin 20 is replaced by a pin that is secured to the ring 17 and engages an aperture in the member 7 and is released therefrom in the event of excessive resistance to rotation of the piston by the action of the bevelled ends on one another.