Rotary-piston machines or pumps

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F04Liquid pumps F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

F04C2/00Rotary-piston machines or pumps

F04C2/02of arcuate-engagement type F04C2/025the moving and the stationary member having co-operating elements in spiral form F04C2/04of internal axis type F04C2/045having a C-shaped piston F04C2/06of other than internal-axis type F04C2/063with coaxially-mounted members having continuously-changing circumferential spacing between them F04C2/067having cam-and-follower type drive F04C2/07having crankshaft-and-connecting-rod type drive F04C2/073having pawl-and-ratchet type drive F04C2/077having toothed-gearing type drive F04C2/08of intermeshing-engagement type F04C2/082Details specially related to intermeshing engagement type machines or pumps F04C2/084Toothed wheels F04C2/086Carter F04C2/088Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement F04C2/10of internal-axis type with the outer member having more teeth or tooth-equivalents F04C2/101with a crescent-shaped filler element, located between the inner and outer intermeshing members F04C2/102the two members rotating simultaneously around their respective axes F04C2/103one member having simultaneously a rotational movement about its own axis and an orbital movement F04C2/104having an articulated driving shaft F04C2/105Details concerning timing or distribution valves F04C2/106Spool type distribution valves F04C2/107with helical teeth F04C2/1071the inner and outer member having a different number of threads and one of the two being made of elastic materials F04C2/1073where one member is stationary while the other member rotates and orbits F04C2/1075Construction of the stationary member F04C2/1076where one member orbits or wobbles relative to the other member which rotates around a fixed axis F04C2/1078where one member rotates and both members are allowed to orbit or wobble F04C2/113the inner member carrying rollers intermeshing with the outer member F04C2/12of other than internal-axis type F04C2/123with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor F04C2/126with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor F04C2/14with toothed rotary pistons F04C2/16with helical teeth F04C2/165having more than two rotary pistons with parallel axes F04C2/18with similar tooth forms F04C2/20with dissimilar tooth forms F04C2/22of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member F04C2/24of counter-engagement type F04C2/26of internal-axis type F04C2/28of other than internal-axis type F04C2/30having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members F04C2/32having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members F04C2/321with vanes hinged to the inner member and reciprocating with respect to the inner member F04C2/322with vanes hinged to the outer member and reciprocating with respect to the outer member F04C2/324with vanes hinged to the inner member and reciprocating with respect to the outer member F04C2/328and hinged to the outer member F04C2/332with vanes hinged to the outer member and reciprocating with respect to the inner member F04C2/336and hinged to the inner member F04C2/34having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members F04C2/344with vanes reciprocating with respect to the inner member F04C2/3441the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation F04C2/3442the surfaces of the inner and outer member, forming the working space, being surfaces of revolution F04C2/3443with a separation element located between the inlet and outlet opening F04C2/3445the vanes having the form of rollers, slippers or the like F04C2/3446the inner and outer member being in contact along more than one line or surface F04C2/3447the vanes having the form of rollers, slippers or the like F04C2/3448with axially movable vanes F04C2/348the vanes positively engaging, with circumferential play, an outer rotatable member F04C2/352the vanes being pivoted on the axis of the outer member F04C2/356with vanes reciprocating with respect to the outer member F04C2/3562the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation F04C2/3564the surfaces of the inner and outer member, forming the working space, being surfaces of revolution F04C2/3566the inner and outer member being in contact along more than one line or surface F04C2/3568with axially movable vanes F04C2/36having both the movements defined in groups F04C2/22 and F04C2/24 F04C2/38having the movement defined in group F04C2/02 and having a hinged member F04C2/39with vanes hinged to the inner as well as to the outer member F04C2/40having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member F04C2/44with vanes hinged to the inner member F04C2/46with vanes hinged to the outer member