Patent GB-936283-A (GB)
Title: A device with rotating pistons, suitable for functioning as a motor, pump, movement or torque repeater
IPC: F02B75/02
Filed: 1961-05-02
Abstract: 936,283. Rotary piston machines. ANZUG VERSUCH-ANSTALT. May 2, 1961 [May 4, 1960], No. 15861/61. Class 110 (2). A rotary I.C. engine, pump, motor, compressor, movement or torque repeater, comprises annular cavities at right-angles or otherwise inclined to each other and intersecting at two places, each cavity having openings for the passage of fluid and housing at least one piston carried by a rotating annular member and mechanism linking the annular members such that the pistons in passing through the cavities do not foul each other at the crossing points. As shown in Fig. 1, annular cavities 1, 2 house pistons 5, 6 respectively extending approximately through 180-degree arcs. The piston 5 is secured on its outer periphery to a ring 3 carrying an annular bevel gear 7 in mesh with a bevel wheel 11 keyed on a shaft 13. The shaft 13 has keyed thereto a second bevel wheel 12 in mesh with an annular bevel gear 8 carried by a ring 4 secured to the inner periphery of the piston 6 so that synchronous movement of the pistons takes place. Fixed walls 9, 10, broken at the intersection points I, I<SP>1</SP>, Fig. 2, on the outer periphery of the cavity 2 and the inner periphery of the cavity 1 respectively together with the continuous rings 3, 4, seal the cavities. In one embodiment, operating as a four-stroke I.C. engine, gaseous mixture is supplied to semi-cavities II, III, Fig. 6, through an inlet duct 19 having a valved branch 20, and to semi-cavities I, IV, through an inlet duct 21 having a valved branch 22 and spent gases exhausted from the semi-cavities II, III, through an outlet duct 23 having valved branches 24 and from the semi-cavities I, IV, through an outlet duct 25 having valved branches 26. Transfer chambers 27, 28 fitted with non-return valves interconnect semicavities III, IV and transfer chambers 29, 30 also fitted with non-return valves interconnect semi-chambers I, II. At the commencement of the cycle, Fig. 6, gaseous mixture is sucked into the semi-cavities I, II and compressed in the semi-cavities III, IV. As the pistons rotate and cross the intersection points, the compressed gaseous mixture is transferred through the chambers 27, 28 from the semicavities III, IV, suitably ignited and expanded into the semi-cavities IV, III to do useful work. At this stage the gaseous mixture in semicavities I, II is being compressed to later be ignited and transferred through chambers 29, 30 to semi-cavities II, I. The semi-cavities III, IV then being open to exhaust. On further rotation of the pistons, spent gases are exhausted from semi-cavities I, II and gaseous mixture sucked into semi-cavities III, IV to complete the cycle. Another four-stroke I.C. engine cycle is illustrated in which inlet ducts 35, 36, Fig. 14, are connected to the semicavities II, IV and outlet ducts 33, 34 to the semi-cavities III, I. There then being only two transfer chambers 28, 29. The invention can also be applied to a two-stroke I.C. engine and to a constant pressure engine in which fuelmixture or explosive-mixture is injected into the expanding semi-cavities. Alternatively, liquid or steam may be injected under pressure into these semi-cavities. In operating as a rotary pump or compressor fluid is sucked into the expanding semi-cavities and discharged from the contracting semi-cavities. It can also be used as a movement or torque repeater with phases similar to those of a two-stroke I.C. engine. Modifications are described with different arrangements of gearing synchronously interconnecting the pistons. In one arrangement, annular cavities disposed at an angle other than a right-angle are described. In another arrangement, is shown and described, three non-concentric annular cavities having their centres on a common axis. Two devices according to the invention may be coupled together concentrically or two or more devices coupled together in side-by-side relationship.