Patent ID: 11885378
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A cylinder unit for an internal combustion engine, comprising:
a cylinder having a bore, the bore having a bore axis;
a piston disposed in the bore and having a connecting boss;
a piston connecting frame member connected to the piston and having a top boss, the piston connecting frame member having lateral portions extending in opposite directions and generally in a direction normal to the bore axis, each of the lateral portions having a vertical linear bearing that each face outward from the respective lateral portions and are each oriented to have an outer face that is parallel to the bore axis, a transverse gap formed at a bottom of the piston connecting frame member;
wherein the connecting boss of the piston includes a threaded bore, the top boss of the piston connecting frame member includes a bore that corresponds to the bore in the connecting boss, the piston connecting frame member further having a port through the piston connecting frame member to which the bore in the top boss extends, a threaded rod is disposed in the bore of the connecting boss the bore through the top boss such that free end of the threaded rod is in the port, and a nut is threaded onto the free end to retain the piston to the piston connecting frame member;
a crankcase having vertical tracks on opposite sides of an interior of the crankcase, wherein the vertical linear bearings are each engaged in one of the vertical tracks; and
a crank connecting member having a top portion, a linear rail formed at the top portion that is captured in the transverse gap, the crank connecting member further having a journal opening configured to receive a crank throw therein;
wherein the crank connecting member translates a circular movement of the crank throw to a vertical linear movement of the piston connecting frame member and piston along the bore axis.