Abstract: A rotary engine is described including: (1) a rotor located within a housing, the rotor configured with a plurality of rotor vane slots; (2) a vane separating an interior space between the rotor and the housing into at least a trailing chamber and a leading chamber, where the vane slidingly engages a rotor vane slot; (3) a first passage through the vane, the first passage including a first exit port into the rotationally trailing chamber; and (4) a second exit port to the rotationally trailing chamber, where the first exit port and the second exit port connect to any of: (a) the first passage through the vane and (b) the first passage and a second passage through the vane, respectively. Optionally, one or more seals affixed to the vane and/or the rotor valve the first passage, the second passage, a vane wingtip, and/or a conduit through the rotor.

Abstract: The invention relates to a rock drill (1) for rotational and percussive action, comprising a drill head (2), a conveying helix (3), a clamping shank and a longitudinal drill axis (L), wherein the drill head (2) has at least one secondary cutting element (5a, 5b) with a front and a rear side face (10a, 10b) and wherein the secondary cutting element (5a, 5b) has a center of mass (M) and a cutting edge (11), the center of mass (M) and the cutting edge (11) defining a first plane (E1), the front side face (10a) of the secondary cutting element (5a, 5b) defining a second plane (E2) and the rear side face (10b) of the secondary cutting element (5a, 5b) defining a third plane (E3).

Abstract: The rotary machine can be used as a rotary internal combustion engine and as a pneumatic or hydraulic pump. The rotary machine comprises a housing in the form of two intersecting cylinder parts of different diameters having parallel axes. A rotor is received in the housing coaxially with the smaller-diameter cylinder and comprises at least two segmental rotor parts provided with annular rotor covers. At least two pairs of annular elements are provided engaging with the segmental rotor parts. Pivotal elements are interposed between the annular elements of each pair. A driving member is accommodated movably in the openings of the pivotal elements. The axis of rotation of the driving member is coincident with the axis of the larger-diameter inner cylindrical surface of the housing.

Abstract: A rotary compressor includes a cylinder main body to define an inner space, a vane coupled to the cylinder main body to extend into and out of the inner space, the cylinder main body including a vane room formed at a side of the cylinder main body to guide entrance and exit of the vane, an opening part to extend from the vane room toward an outer surface of the cylinder main body, and a valve accommodating part to extend from the opening part, and having a sectional area larger than the opening part, and a vane room valve seated in the valve accommodating part to open and close the opening part according to pressure of the vane room.

Abstract: An engine with one or more ring cylinders of round cross-section is disclosed. In each ring cylinder are provided at least two rotary pistons whose cross-sections match that of the ring cylinder, the pistons being mounted on the circumference of a rotary disc which is mounted on a shaft and incapable of rotating. Each cylinder is provided with disc cams in the form of rotary valves which protrude at their peripheral areas through slots which extend transversely in relation to the course of the ring cylinders. Rotary valves engage in overflow channels and in the ring cylinder between an intake compression chamber and an expansion chamber. The rotary valves engage in the ring cylinder between an expansion chamber and an intake compression chamber. The rotary valve grooves are so arranged as to clear the ring cylinder for the rotary pistons.

Abstract: A rotary compressor includes housing means in which an impeller is rotatably mounted.

Abstract: An internal combustion engine of the rotary type which includes a cylindrical rotor having a skirt portion, rotating in an annular chamber, that comprises two arcuate walls of differing radii joined by relatively short, diametrically disposed sloping portions that serve as pistons. A sliding divider which extends through the annular chamber and the skirt portion establishes, with the sloping skirt portions, sub-chambers in the annular chamber in which compression of a combustible gas mixture and combustion of the mixture take place, the latter producing power for moving the rotor and the power shaft attached thereto. The divider is provided with longitudinallly spaced slots in which the rotor skirt is engaged whereby the divider is reciprocated as the sloping portions of the skirt pass through the slots.

Abstract: A rotary pump of the stationary single vane type wherein the vane is arranged to automatically accommodate for the direction of rotor rotation to provide for the flow of fluid through the pump in a single direction regardless of the direction of rotor rotation, the vane also being operable to automatically relieve excessive pressures in the pumping chambers.