Patents by Inventor Rolf Weiler

Rolf Weiler 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: 4394833
    Abstract: A low-pressure brake booster for automotive vehicles includes a low-pressure casing which is sealingly subdivided into a low-pressure chamber and a working chamber by an axially movable wall. The axially movable wall includes a flexible diaphragm abutting a diaphragm plate made of plastic. The diaphragm plate has a hub whose end surface is connected in a catching engagement with a metallic spacer ring. The spacer ring has radial ribs that extend through slots of a central reinforcement tube for the casing and transmits the boosting force from the diaphragm plate onto a control valve housing disposed internally of the tube. Latches extending from the diaphragm plate engage by means of detents behind the spacer ring and form a centering arrangement for a compression spring which urges the spacer ring against the hub of the diaphragm plate and, hence, the diaphragm plate into its inoperative position.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: July 26, 1983
    Assignee: ITT Industries, Inc.
    Inventors: Rolf Weiler, Wilfried Wagner
  • Patent number: 4353287
    Abstract: A considerable reduction in weight of a brake booster is achieved in relation to conventional brake boosters by disposing a tube or pipe coaxially in the vacuum housing and connected to both end walls of the vacuum housing. According to the present invention the overall length of brake booster is reduced and the assembly thereof is easier. This is accomplished by constructing the force transmitting elements between the movable wall and the control housing as ring segments which are rigidly fastened to the movable wall on the vacuum chamber side thereof and engage radial indentations at the adjacent end of the control housing.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: October 12, 1982
    Assignee: ITT Industries, Inc.
    Inventor: Rolf Weiler
  • Patent number: 4325407
    Abstract: Pressure control devices with a valve connected between an inlet chamber and an outlet chamber and a non-return valve operating as a by-pass are known. The non-return valve opens due to a reduction in pressure in the inlet chamber relative to the pressure in the outlet chamber against a closing force. This type of known pressure control devices are very expensive to manufacture and are not safe against failure and great erosion. According to the present invention a single arrangement providing the valve and the non-return valve comprises a tappet with a valve body fixed thereto to provide the operation of both valves. The valve body is essentially cylindrical and elastic and its outer surface is spaced from the inner surface of the outlet chamber. The outer surface of the valve body is armored in such a way that a deformation in the radial direction toward the inner surface of the outlet chamber is avoided.
    Type: Grant
    Filed: July 17, 1980
    Date of Patent: April 20, 1982
    Assignee: ITT Industries, Inc.
    Inventors: Rolf Weiler, Bernd Schopper
  • Patent number: 4325218
    Abstract: Known vacuum brake boosters are provided with a heavy sheet metal vacuum housing for transmitting reaction forces of the mechanical actuation to the booster carrier plate secured to a vehicle. According to the present invention the weight of the booster is remarkably reduced by providing draw bars for transmitting the reaction forces to the carrier plate inside the vacuum housing parallel to the push rod, penetrating the vacuum piston or movable wall and connecting both transverse end walls of the vacuum housing to the carrier plate. The draw bars are sealed at their point of penetration of the vacuum piston by small rolling membranes which are surrounded by tubular members fastened to the vacuum piston. A base plate assembly is provided including a base plate fastened to the transverse end wall of the vacuum housing adjacent the master cylinder, bolts fastened to one side of the base plate upon which the master cylinder is fastened and the draw bars are fastened to the other side of the base plate.
    Type: Grant
    Filed: February 14, 1980
    Date of Patent: April 20, 1982
    Assignee: ITT Industries, Inc.
    Inventors: Rolf Weiler, Peter Bohm
  • Patent number: 4269110
    Abstract: The reaction mechanism comprises a control casing secured to a movable member separating a vacuum chamber from a working chamber in a vacuum brake booster; reaction levers engaging to the casing adjacent the vacuum chamber; a reaction plate guided and secured against lateral displacement in recesses in the casing adjacent the vacuum chamber and engaging the side of the levers adjacent the vacuum chamber; a cap secured to the outer edge of the casing adjacent the vacuum chamber having a guide sleeve therein extending into the vacuum chamber, the cap enclosing the plate and the levers; and a master cylinder actuating push rod guided in the guide sleeve and having one end thereof abutting against the plate.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: May 26, 1981
    Assignee: ITT Industries, Inc.
    Inventor: Rolf Weiler
  • Patent number: 4246755
    Abstract: The power brake unit comprises a master cylinder, a booster utilizing the pressure difference between a vacuum and atmospheric pressure including a vacuum casing, and a cage-like housing structure embracing the vacuum casing and secured to a splashboard of a vehicle, with the master cylinder and the vacuum casing being secured to the housing structure in an operative relationship. The power brake unit is thereby supported by the housing structure in a manner to substantially reduce the lost travel of the brake pedal due to axial extension of the vacuum casing experienced in prior art arrangements caused by applied braking forces and enables a reduction of weight of the power brake unit since lighter weight materials may be employed in the various components of the power brake unit.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: January 27, 1981
    Assignee: ITT Industries, Inc.
    Inventor: Rolf Weiler
  • Patent number: 4233884
    Abstract: In prior art vacuum brake boosters embodying a two-stage reaction, the magnitude of the two-stage reaction is limited because of the small space available for the reaction-delaying spring. Moreover, the lost motion present in the reaction lever mechanism has to be overcome when the braking operation is initiated. These disadvantages are overcome in a vacuum brake booster including a reaction mechanism constructed in accordance with the present invention wherein the reaction-delaying spring is positioned on the side of the reaction levers adjacent the vacuum chamber and by having the point of contact of the spring on the reaction levers at a greater radius than the point at which the levers are in engagement with the movable wall.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: November 18, 1980
    Assignee: ITT Industries, Inc.
    Inventors: Rolf Weiler, Peter Bohm
  • Patent number: 4147236
    Abstract: The arrangement indicates pad wear for brake shoes comprising a contact head embedded in the brake shoe and a socket connector adapted to be readily connected with the contact head with an electrical line leading from the socket connector to an indicating arrangement. When the worn brake shoe is to be replaced only the contact head which is embedded in the brake shoe is discarded. The socket connector can be reused after each replacement.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: April 3, 1979
    Assignee: ITT Industries, Inc.
    Inventors: Hermann Steffen, Rolf Weiler
  • Patent number: 4039197
    Abstract: A sealing ring is disclosed for sealing a pin which is displaceable chiefly along its axis through a passage in a housing wall into a chamber. A sealing ring housing is inserted into an annular groove in the housing wall. The sealing ring housing encompasses a ring made of wear-resistance material seated on the pin with a small radial clearance and having a large radial clearance in the sealing ring housing. A slide ring is seated on the pin without clearance with a large radial clearance in the sealing ring housing. The invention provides a sealing ring which permits easy axial and radial movement of the pin and prevents the ingress of dirt and humidity into the interior of the housing from the outside through the pin passage.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: August 2, 1977
    Assignee: ITT Industries, Inc.
    Inventors: Herbert Schmidt, Rolf Weiler