Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...
Patent
1988-07-12
1990-07-03
Vrablik, John J.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Unit of mass is a gas which is heated or cooled in one of a...
60519, 418 53, F02G 1044, F02G 105, F01C 306
Patent
active
049380257
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a power conversion machine having a pair of mutually opposite, separately double-acting pistons which are moved in a turning motion in a spherical housing, where the pistons are rigidly connected to each other via a common hub portion centrally in the spherical housing and are disposed each on its respective side of a centrally arranged, transversely extending partition plate which is locally passed through by the hub portion of the pistons and where the pistons at diametrically opposite ends, that is to say asymmetrically relative to each piston, are pivotably mounted each via its respective rotary pin in the spherical housing about a first axis.
From U.S. Pat. No. 4,441,869, a power conversion machine of the afore-mentioned kind is known. Two mutually coherent, oppositely directed, conic stump-shaped pistons are proposed which are rolled off on opposite sides of a common, stationary partition plate in the spherical housing. More specifically, pairs of alternately volume increasing and volume reducing work chambers are defined by means of each piston and a slide plate (hub portion) between the pistons, on opposite sides of the roller structure between the piston and the partition plate. Here one is dependent upon a slide plate which connects the pistons to each other and which is tiltable in a sealed-off slot in the stationary partition plate.
With the present invention the aim is a simpler and, in practice, more readily adaptable solution from a constructional and utilitarian viewpoint. In particular, the aim is a solution where one avoids the mentioned rolling off movements of the pistons against the partition plate and the axial sliding movement of the slide plate which connects the pistons to each other, and where one can, instead, employ a more readily controllable to-and-fro movement of the pistons and simultaneously a connection more readily sealable between the pistons and the partition plate.
The power conversion machine according to the invention is characterised in that each piston in a manner known per se has the form of a spherical segment with oppositely directed piston surfaces which outermost are terminated by the spherical surface of the spherical segment or the piston and which innermost are connected to each other via said hub portion with intermediate part-cylindrical hub portion surfaces which form bearing surfaces against equivalent part-cylindrical partition wall surfaces, and that the partition plate is pivotably mounted in the spherical housing about another axis which crosses the first axis in the centre of the spherical housing, the partition plate at opposite ends of the hub portion of the pistons being provided with bearing portions with a part-cylindrical bearing surface for each piston and with end bearing surfaces corresponding to end bearing surfaces in the hub portion of the pistons.
From United Kingdom Patent Specification Nos. 1,259,801 and 1,549,269 solutions are known where each piston has the form of a spherical segment with oppositely directed piston surfaces which are terminated outermost by the spherical surface of the spherical segment or the piston. The pistons define directly between them two oppositely acting work chambers.
By employing according to the invention a pivotably mounted partition plate one can obtain purely constructionally a simpler and more effective cooperating connection between the partition plate and the pistons. In particular the partition plate can be allowed to participate in certain movements together with the pistons and in other movements relative to the pistons, so that the change in volume can be achieved in the respective work chambers by a compound, forcibly controlled, relative movement of the pistons and the partition plate. More specifically the piston surface and the opposite surface of the partition plate can be tilted towards and away from each other, at the same time as the pistons and the partition surface move collectively in a mutually forcibly controlled manner relative to the inner surfa
REFERENCES:
patent: 826985 (1906-07-01), Appel
patent: 3509718 (1970-05-01), Fezer et al.
patent: 4228656 (1980-10-01), MacGlashan, Jr.
patent: 4441869 (1984-04-01), Larsen et al.
3D International A/S
Vrablik John J.
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