Patents by Inventor Helmut Pietsch

Helmut Pietsch 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: 6736204
    Abstract: This invention relates to a heat transfer surface (3) or tubular or plate-like bodies (4) having a microstructure (7) projecting out of the base surface (3a) and consisting of projections (6) which are galvanized onto the base surface (3) with a minimum height of 10 &mgr;m. The object of this invention is to create a heat transfer surface (3) of this type which is characterized by an increase in thermal efficiency of its heat transfer surfaces (3) with the smallest possible temperature differences and is suitable for both nucleate boiling and film condensation with a justifiable manufacturing expense. The object is achieved according to this invention by the fact that the base surface (3a) is covered entirely or partially with projections (6); these projections (6) are applied in the form of ordered microstructures (7) and they have a pin shape, extending with their longitudinal axis (6c) either at a right angle to the base surface (3a) or at an angle (&agr;) between 30° and 90°.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: May 18, 2004
    Assignee: SDK-Technik GmbH
    Inventors: Dieter Gollan, Jovan Mitrovic, Andreas Schulz, Helmut Pietsch
  • Publication number: 20030136547
    Abstract: This invention relates to a heat transfer surface (3) or tubular or plate-like bodies (4) having a microstructure (7) projecting out of the base surface (3a) and consisting of projections (6) which are galvanized onto the base surface (3) with a minimum height of 10 &mgr;m.
    Type: Application
    Filed: November 27, 2002
    Publication date: July 24, 2003
    Inventors: Dieter Gollan, Jovan Mitrovic, Andreas Schulz, Helmut Pietsch
  • Patent number: 6186286
    Abstract: A braking device for wheels of vehicles such as trailers includes a caliper in which brake linings are guided. Between these linings, at least one brake disk is displaceably held on driving toothing of a wheel hub. A pneumatically operable mechanical adjusting device interacts with the brake linings. The braking device includes at least one brake disk in a caliper which is fixed. On one end, the caliper is connected by a fastening element with an axle element of the vehicle. On the caliper, an enclosing housing for bearing the adjusting device is held. By way of a bearing plate, the adjusting device is also supported on the caliper. Pressure pistons of the device are guided by a one-part yoke in a jointly axially adjustable manner and can be acted upon by pressure with respect to the brake linings and the brake disks.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: February 13, 2001
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventors: Harald Häussler, Helmut Pietsch, Roland Martin, Carsten-Jörg Mertens, Artur Grunwald, Thomas Klaas, Michael Pehle, Reinhold Pittius
  • Patent number: 4169121
    Abstract: An absorbent material is provided having exceptional fluid suction and holding power for aqueous physiological fluids, and which is thus especially adaptable for use as tampons, sanitary napkins, baby diapers, hospital pads and the like. The material consists essentially of cellulose fibers containing from 5 to 20% by weight of sodium carboxymethyl cellulose. The material is formed by a process in which a viscose spinning solution is produced from cellulose xantogenate by dissolving in aqueous caustic soda solution and permitting the solution to ripen, spinning the latter in an acid spinning bath, and then cleaning and drying the resultant threads, the spinning solution containing 5 to 20% by weight of sodium carboxymethyl cellulose.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: September 25, 1979
    Inventors: Helmut Pietsch, Walter Horn