US 12,345,364 B2
Coupling for double-walled hoses
Okan Cebeci, Çorlu (TR); Erhan Aptiogullari, Kapakli (TR); Recep Can, Kapakli (TR); Recep Muco, Kapakli (TR); and Özgür Caliskan, Kapakli (TR)
Assigned to DANFOSS POWER SOLUTIONS II TECHNOLOGY A/S, Nordborg (DK)
Filed by Danfoss Power Solutions II Technology A/S, Nordborg (DK)
Filed on Aug. 23, 2023, as Appl. No. 18/454,294.
Claims priority of application No. 22191988 (EP), filed on Aug. 24, 2022.
Prior Publication US 2024/0068613 A1, Feb. 29, 2024
Int. Cl. F16L 39/00 (2006.01); F16L 33/207 (2006.01); F16L 39/02 (2006.01)
CPC F16L 39/005 (2013.01) [F16L 33/2076 (2013.01); F16L 39/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coupling for a double-walled tube or hose having two coaxially arranged sheaths, the coupling comprising:
a first inner sleeve surrounding an inner fluid conduit for transfer of a first fluid, wherein the inner fluid conduit is configured to fluidly connect with a first tube or hose fluid conduit formed by a first inner sheath of the tube or hose,
a second sleeve surrounding the first inner sleeve,
a third sleeve surrounding the second sleeve,
a fourth outer sleeve surrounding the third sleeve,
wherein the first and the second sleeve form a first receiving space for receiving the first inner sheath of an end of the double-walled tube or hose,
wherein the third and fourth sleeve form a second receiving space for receiving a second outer sheath of the end of the double-walled tube or hose,
wherein the second and third sleeve form an outer fluid conduit for transfer of a second fluid, wherein the outer fluid conduit is configured to fluidly connect with a second tube or hose fluid conduit formed by a clearance between the first inner sheath and the second outer sheath of the double-walled tube or hose,
wherein the second and third sleeve are designed as a one-piece part.