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US 5,081,963 AGranted
Reciprocatory machines
AssigneeGalbraith Engineering Pty. Ltd.
InventorPeter A. Galbraith
Life of this patent
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AssigneeGalbraith Engineering Pty. Ltd.
InventorPeter A. Galbraith
Estimating the term…
A reciprocatory machine having a cylinder defining with at least one piston a working chamber. Each piston is reciprocable in the cylinder by a respective crankshaft. The machine has intake and exhaust ports disposed at opposite ends of the working part of the cylinder and has respective valves additional to the pistons for opening and closing the ports. The valves are driven by the crankshaft(s) and have provision for adjusting the timing relationship between the displacement of the crankshaft(s) and the valves and thereby the timing relationship between the respective valves. The location of the ports at opposite ends of the working part of the cylinder permits considerably greater adjustment of the timing than is possible with conventional closely spaced porting arrangements. The machine preferably operates as a two-stroke internal combustion engine but may also operate as a pump or compressor.
A reciprocatory machine adaptable as a 2-stroke engine comprising means defining a working chamber, at least one piston reciprocable within the chamber, displaceable translating means associated with the piston and adapted to translate reciprocating motion of the piston into rotational movement or vice versa, intake and exhaust ports for the working chamber and respective intake and exhaust valve means for said ports distinct from said at least one piston, and means for causing said respective valve means to cyclically operate in response to said reciprocating motion of the piston, wherein at least one of the valve means comprises a sleeve valve reciprocable within said working chamber about said at least one piston and wherein said intake and exhaust ports are disposed at or adjacent to opposite ends of the working chamber respectively and means are provided for effecting independent adjustment of the timing relationship between the cyclic operation of each of the intake and exhaust valve means and the displacement of the translating means including independent adjustment of the timing of both opening and closing of each of the intake and exhaust valve means, and thereby to adjust the timing relationship between the cyclic operation of the respective valve means.
Dependencies are inferred from the claim text.