ข้อมูลสัญลักษณ์จำแนกการออกแบบผลิตภัณฑ์ระหว่างประเทศ


รหัส / code คำอธิบาย / code name Version
F28D0007040000 the conduits being spirally coiled (F28D0007100000 takes precedence);; 1
F28D0007060000 the conduits having a single U-bend (F28D0007100000 takes precedence);; 1
F28D0007080000 the conduits being otherwise bent, e.g. in a serpentine or zig-zag (F28D0007100000 takes precedence);; 1
F28D0007100000 the conduits being arranged one within the other, e.g. concentrically 1
F28D0007120000 the surrounding tube being closed at one end, i.e. return type (F28D0007140000 takes precedence);; 1
F28D0007140000 both tubes being bent 1
F28D0007160000 the conduits being arranged in parallel spaced relation (F28D0007020000-F28D0007100000; take precedence);; 1
F28D0009000000 Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall 1
F28D0009020000 the heat-exchange media travelling at an angle to one another (F28D0009040000 takes precedence);; 1
F28D0009040000 the conduits being formed by spirally-wound plates or laminae 1
F28D0011000000 Heat-exchange apparatus employing moving conduits 1
F28D0011020000 the movement being rotary, e.g. performed by a drum or roller (F28D0011080000 takes precedence);; 1
F28D0011040000 performed by a tube or a bundle of tubes 1
F28D0011060000 the movement being reciprocating or oscillating (F28D0011080000 takes precedence);; 1
F28D0011080000 more than one conduit assembly performing independent movements, e.g. rotary bundle of tubes in a rotary drum 1