Patents by Inventor Rolf Hedman

Rolf Hedman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11150027
    Abstract: A plate type heat exchanger for an oil cooler includes at least two heat exchanger members, each enclosing a respective first cavity (C1). The plate type heat exchanger includes at least one inlet port (20, 22), for feeding a medium to the first cavities and at least one output port (21, 23) for extracting the medium from the first cavities (C1). The plate type heat exchanger includes at least one mounting member (13, 14), which is attached to an outside of an outermost one, as seen in a stacking direction (Z), of the heat exchanger members. A second cavity (C2) is formed between the at least two heat exchanger members. A reinforcement plate (30, 31) is located on an inside of the outermost one of the heat exchanger members, and at least partially overlapping the mounting member (13, 14).
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: October 19, 2021
    Inventors: Arnaud Contet, Rolf Hedman, Jenny Fritiofsson
  • Publication number: 20170176110
    Abstract: The present document discloses a plate type heat exchanger for an oil cooler, comprising at least two heat exchanger members, each enclosing a respective first cavity (C1), at least one inlet port (20, 22), for feeding a medium to the first cavities and at least one output port (21, 23) for extracting the medium from the first cavities (C1); and at least one mounting member (13, 14), which is attached to an outside of an outermost one, as seen in a stacking direction (Z), of the heat exchanger members. A second cavity (C2) is formed between the at least two heat exchanger members. A medium present in the second cavity (C2) is isolated from a medium present in the first cavities (C1). A reinforcement plate (30, 31) is located on an inside of the outermost one of the heat exchanger members, and at least partially overlapping the mounting member (13, 14).
    Type: Application
    Filed: March 30, 2015
    Publication date: June 22, 2017
    Applicant: Titanx Engine Cooling Holding AB
    Inventors: Arnaud Contet, Rolf Hedman, Jenny Fritiofsson
  • Patent number: 6216775
    Abstract: Arrangement in a heat exchanger, for example a retarder oil cooler, constructed from plates with alternating cooling water and oil ducts between them. The plates surrounding the cooling water ducts are provided with converging inward bends in the form of nipples, which are intended to keep the said plates at a distance from one another. Between the plates surrounding the oil ducts there is a so-called turbulator, which on the one hand serves to increase the surface and on the other is designed to make the flow turbulent. The arrangement is characterized in that the oil ducts situated outermost in the cooler each comprise elements designed to reduce the flow through these compared to the flow in other oil ducts. An improved thermal equilibrium is thereby achieved in the outermost ducts, which gives a reduced risk of thermal fatigue, especially in the inward bends converging in the cooling water ducts in the form of nipples. The service life of the heat exchanger is thereby prolonged.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: April 17, 2001
    Assignee: Valeo Engine Cooling AB
    Inventor: Rolf Hedman
  • Patent number: 6073616
    Abstract: The invention concerns an arrangement comprising an inlet manifold for an internal combustion engine. The arrangement comprises an element formed with flow ducts. It is formed with two coupling device halves which communicate with the ducts. These coupling device halves can be connected to two corresponding coupling device halves disposed on the inlet manifold. One of these halves communicates with the member for supplying air of combustion for the engine and with an engine coolant discharge pipe. The other communicates with the inlet manifold and with a feed pipe for said coolant.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: June 13, 2000
    Assignee: Valeo Engine Cooling AB, Oil Cooler Division
    Inventor: Rolf Hedman
  • Patent number: 5184673
    Abstract: The invention relates to a method for the manufacture of a plate heat exchanger/cooler (1), and to an arrangement for a plate heat exchanger/cooler produced by furnace brazing. When finished, the heat exchanger exhibits a number of passageways (2-7) communicating in parallel via collectors (8a) and intended for a fluid which is cooled. Each of the passageways (2-7) consists of a pair of plates (2a, 2b, . . . 7a, 7b) facing one another. These have openings (2a2, 2b2, . . . 7a2, 7b2) arranged on the ends which, in the finished heat exchanger/cooler, constitute the aforementioned collectors (8a). Spacer washers (10) which define flow openings (10a) for a cooling medium are present between pairs of plates situated adjacent one another. The spacer washers (10) and the plates (2a, 2b, . . . 7a, 7b) and the pairs of plates are joined together at least along their outward-folded edges (2a1, 2b1, . . . 7a1, 7b1) by a furnace brazing process.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: February 9, 1993
    Assignee: Torell AB
    Inventors: Erik Hedman, Rolf Hedman