Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1987-05-04
1990-02-06
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
123197AC, F16H 2138
Patent
active
048980412
ABSTRACT:
A reciprocating engine has a cylinder with a piston that travels between top dead center and bottom dead center, and a pair of parallel counter-rotating cranks that are joined by respective connecting rods to a piston rod that passes through the plane defined by the axes of the cranks. This construction permits the rotary motion of the cranks to exceed 180.degree. during either the compression or the power stroke of the piston and to be correspondingly less than 180.degree. for the other. To avoid having bending or buckling forces applied to the connecting rods, the piston rod is sufficiently long that the couplings of the piston rod and the connecting rods remain disposed to the side of the plane of the cranks that is remote from the piston for all travel of the piston between top dead center and bottom dead center positions. The mechanical advantage as between power and compression strokes can exceed 2:1, yielding a favorable mechanical advantage for the expanding combustion gas in the cylinder chamber.
REFERENCES:
patent: 1527296 (1925-02-01), Dudas
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patent: 2392921 (1946-01-01), Holman
patent: 2417910 (1947-03-01), Bruegger
patent: 2963854 (1960-12-01), Meijer
patent: 3059418 (1962-10-01), Johnston
patent: 3680396 (1972-08-01), Healy
Anchell Scott
Braun Leslie A.
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