Patents Assigned to Yuugen Kaisha Marunaka Seisakusho
  • Pipe for coolant condenser
    Patent number: 5052480
    Abstract: A header pipe for an automobile coolant condenser having a W-shaped profile in longitudinal cross section such that the projecting portions of the profile makes two-point contact with the ends of the corrugated fins.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: October 1, 1991
    Assignee: Yuugen Kaisha Marunaka Seisakusho
    Inventors: Ichio Nakajima, Tsuneo Kousaka, Noboru Okada
  • Pipe for coolant condenser
    Patent number: 5052477
    Abstract: A plurality of short pipe body sections can be coupled to one another with a coupling which has cylindrical contact about the inner and/or outer surfaces of the pipes to obtain a pipe having a desired length. The coupling also serves as a partitioning plate to block flow of coolant through pipe.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: October 1, 1991
    Assignee: Yuugen Kaisha Marunaka Seisakusho
    Inventors: Ichio Nakajima, Tsuneo Kousaka, Noboru Okada
  • Tube for coolant condenser
    Patent number: 5052479
    Abstract: The flat tubular heat exchange body is provided with shoulders on each of its peripheral side walls at a fixed distance from each end. The ends of the bodies is shaped and sized to fit into a slot in a header pipe so that when the shoulders strike the surface of the header pipe, the invention is automatically fixed.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: October 1, 1991
    Assignee: Yuugen Kaisha Marunaka Seisakusho
    Inventors: Ichio Nakajima, Tsuneo Kousaka, Yoshihito Takagi
  • Pipe for coolant condenser
    Patent number: 5052478
    Abstract: A header pipe is formed with a plurality of oblong slots which extend radially through the wall of the pipe and have an outside dimension larger than that of the tubular heat exchanger which is inserted in the slot. The peripherally directed edges on the exterior surface of the pipe surrounding the slots are curved to flare outwardly to form a taper for the insertion of the tubular heat exchanger.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: October 1, 1991
    Assignee: Yuugen Kaisha Marunaka Seisakusho
    Inventors: Ichio Nakajima, Tsuneo Kousaka, Akio Matsushima