# US 2014/0360359 A1 · Rotary Piston > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360359 A1 - Document ID: US20140360359A1 - Status: Published application - Kind: A1 - Application number: 14/464,526 - Filed: 2014-08-20 - Published: 2014-12-11 - Earliest claimed: 2012-02-20 - Inventors: Liessel Roland; Wolfgang Nindel; Bernhard Murrenhoff; Robert Kurz; Reinhard Denk; Josef Strassl; Thomas Boehme; Hisham Kamal; Stefan Weigl; Roger Willis; Stefan Kern; Johann Kreidl; Gunther Herr; Marcel Verhoeven; Franz Kneidl; Mikael Tekneyan; Matthias Gradl; Erwin Weber - Web page: https://patentgrep.com/patent/US20140360359A1 ## CPC - F02F 3/28: Other pistons with specially-shaped head - F01C 21/08: Rotary pistons (reciprocating pistons in general F16J) - F04C 2/126: {with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type} - F04C 13/001: {Pumps for particular liquids} - F04C 2/123: {with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth} - F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A rotary piston for a rotary piston pump includes at least one supporting body, through which a rotational axis of the rotary piston extends, and at least one end cap section, which is disposed radially outwards from the at least one supporting body and is connected flexibly, preferably elastically, to the at least one supporting body. ## Claims ### Claim 1 A rotary piston for a rotary piston pump, the rotary piston comprising: at least one supporting body, through which a rotational axis of the rotary piston extends, and at least one dimensionally stable end cap section, which is disposed radially outwards from the at least one supporting body and is connected flexibly to the at least one supporting body. ### Claim 2 (depends on 1) The rotary piston according to claim 1, wherein the at least one supporting body of the rotary piston and the at least one end cap section are connected to one another via at least one elastomer cushioning layer. ### Claim 3 (depends on 1) The rotary piston according to claim 1, further comprising at least two end cap sections, which are connected to one another by means of at least one loop packet. ### Claim 4 (depends on 3) The rotary piston according to claim 3, wherein the at least one loop packet connecting the at least two end cap sections extends along the at least one supporting body, wherein the at least two end cap sections each comprise at least one coupling means, around which the at least one loop packet is looped. ### Claim 5 (depends on 1) The rotary piston according to claim 1, wherein the at least one supporting body and the at least one end cap section are connected to one another by means of at least one loop packet. ### Claim 6 (depends on 5) The rotary piston according to claim 5, wherein the at least one supporting body and the at least one end cap section are connected to one another by means of at least one loop packet arrangement. ### Claim 7 (depends on 6) The rotary piston according to claim 6, wherein the loop packets of the at least one loop packet arrangement are disposed on the at least one supporting body and the at least one end cap section in such a way that at least two of the loop packets of the at least one loop packet arrangement intersect. ### Claim 8 (depends on 6) The rotary piston according to claim 6, wherein the loop packets of the at least one loop packet arrangement are disposed on the at least one supporting body and the at least one end cap section in such a way that the loop packets of the at least one loop packet arrangement run parallel to one another between the at least one supporting body and the at least one end cap section. ### Claim 9 (depends on 6) The rotary piston according to claim 6, wherein at least one coupling means is provided in each case on the at least one supporting body and the at least one end cap section, wherein the at least one coupling means of the at least one supporting body and the at least one coupling means of the at least one end cap section are looped around by the at least one loop packet of the at least one loop packet arrangement. ### Claim 10 (depends on 9) The rotary piston according to claim 9, wherein all the loop packets of the at least one loop packet arrangement loop around the at least one coupling means on the at least one end cap section. ### Claim 11 (depends on 5) The rotary piston according to claim 5, wherein the at least one loop packet is guided in a curved manner around at least one guide element. ### Claim 12 (depends on 3) The rotary piston according to claim 3, wherein the at least one loop packet is embedded at least in sections in at least one elastomer cushioning layer, the at least one elastomer cushioning layer connecting the at least one supporting body of the rotary piston to the at least one end cap section. ### Claim 13 (depends on 1) The rotary piston according to claim 1, wherein the at least one supporting body and the at least one end cap section are connected to one another in a form-fit manner. ### Claim 14 (depends on 13) The rotary piston according to claim 13, wherein the at least one supporting body and the at least one end cap section comprise, for the purpose of producing a form-fit connection, at least one complementary pair of at least one projection and at least one recess. ### Claim 15 A rotary piston pump comprising: a rotary piston having at least one supporting body, through which a rotational axis of the rotary piston extends, and at least one dimensionally stable end cap section, which is disposed radially outwards from the at least one supporting body and is connected flexibly to the at least one supporting body.