Abstract: The invention relates to a method and a device for demolding annular elastomeric molded parts from a mold core of an injection mold which has an inner mold core (1) and outer mold jaws and in which the molded parts (9) are produced parallel to one another in annular mold cavities (5) of the mold core (1). According to the invention, after removal of the outer mold jaws, the mold core (1), which contains the produced elastomeric molded parts (9) on the surface thereof, is set at such a high rotational speed about the longitudinal axis thereof that the internal diameter of the elastomeric molded parts (9) is increased because of centrifugal force to such an extent that the molded parts (9) are released from the mold cavities (5) and can be removed from the mold core (1) in the axial direction (10) while they are still rotating.

Abstract: The invention relates to a method and a device for demolding annular elastomeric molded parts from a mold core of an injection mold which has an inner mold core (1) and outer mold jaws and in which the molded parts (9) are produced parallel to one another in annular mold cavities (5) of the mold core (1). According to the invention, after removal of the outer mold jaws, the mold core (1), which contains the produced elastomeric molded parts (9) on the surface thereof, is set at such a high rotational speed about the longitudinal axis thereof that the internal diameter of the elastomeric molded parts (9) is increased because of centrifugal force to such an extent that the molded parts (9) are released from the mold cavities (5) and can be removed from the mold core (1) in the axial direction (10) while they are still rotating.

Abstract: A crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include connector pivoted to the crankshaft, the connector having a radially extended and smoothly arched sliding slot, and a coupling rod member, the coupling rod member having a top end pivoted to the piston and a bottom end pivotally mounted with a roller assembly coupled to the sliding slot of the connector and movable between two distal ends of the sliding slot upon reciprocating motion of the piston.

Abstract: A spring-supported crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connector axially movably coupled to the piston by a slip joint, a stop device fixedly fastened to the piston to limit the moving distance of the connector relative to the piston, a spring member mounted in the piston and adapted to impart a downward pressure to the connector, and a connecting rod adapted to couple the connector to the crankshaft.

Abstract: A crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connecting rod, the connecting rod having a top end coupled to the piston by a slip joint and a bottom end pivoted to the crankshaft, and a slide slidably coupled to a sloping face inside the piston above the oblong coupling hole, the slide having two bottom lugs bilaterally pivoted to the top end of the connecting rod above the oblong coupling hole of the piston.

Abstract: A crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include connector pivoted to the crankshaft, the connector having a radially extended and smoothly arched sliding slot, and a coupling rod member, the coupling rod member having a top end pivoted to the piston and a bottom end pivotally mounted with a roller assembly coupled to the sliding slot of the connector and movable between two distal ends of the sliding slot upon reciprocating motion of the piston.

Abstract: An extendable coupling structure used in an engine and coupled between a piston and a crankshaft is constructed to include, a first connector pivoted to the piston, a second connector pivoted to the crankshaft, a hinge coupled between the first connector and the second connector, and a spring-based guide coupled between the bottom end of the first connector and the top end of the second connector and adapted to guide movement of the first connector and the second connector between a close position and an open position and to accelerate rotation of the crankshaft.

Abstract: A spring-supported crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connector axially movably coupled to the piston by a slip joint, a stop device fixedly fastened to the piston to limit the moving distance of the connector relative to the piston, a spring member mounted in the piston and adapted to impart a downward pressure to the connector, and a connecting rod adapted to couple the connector to the crankshaft.

Abstract: A spring-supported coupling device used in an engine and coupled between a piston and a crankshaft is constructed to include, a first connector pivoted to the piston, a second connector pivoted to the crankshaft, a rod member coupled between the first connector and the second connector and axially movable relative to the first connector and the second connector, and a spring member axially compressibly connected between the first connector and the second connector around the rod member.

Abstract: A spring-based crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a first coupling member pivoted to the piston, the first coupling member having a downwardly extended receiving open chamber defined in a downwardly extended hollow body thereof and an inner tube suspended in the downwardly extended receiving open chamber, a second coupling member pivoted to the crankshaft, the second coupling member having an upwardly extended hollow body axially movably sleeved onto the inner tube in the hollow body of the first coupling member, and an axially compressible spring member mounted in the inner tube inside the first coupling member and coupled between the first coupling member and the second coupling member.

Abstract: A crankshaft coupling structure used in an engine and coupled between a piston and a crankshaft to enhance the output torque of the engine is disclosed to include a connecting rod, the connecting rod having a top end coupled to the piston by a slip joint and a bottom end pivoted to the crankshaft, and a slide slidably coupled to a sloping face inside the piston above the oblong coupling hole, the slide having two bottom lugs bilaterally pivoted to the top end of the connecting rod above the oblong coupling hole of the piston.

Abstract: An engine having a connecting rod, a piston and a crankshaft is provided. The connecting rod extends between to connect the piston and the crankshaft. The connecting rod has formed therethrough at least one hole which provides a lubrication path to an interface between the connecting rod and piston conjunction point.

Abstract: An engine comprising a connecting rod, a piston and a crankshaft, the connecting rod connecting between the piston and the crankshaft, characterized in that: the connecting rod having at least one hole which provides the lubrication path between the connecting rod and piston conjunction point.