Patents by Inventor Rudiger Hoffmann
Rudiger Hoffmann 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).
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Patent number: 4287915Abstract: A control valve for controlling a routing of a pressure medium in pneumatic conduits, especially those in motor vehicles, wherein the control valve includes a housing provided with a cylindrical recess and a control slide guided in the cylindrical recess in a longitudinally-displaceable fashion. A gasket or sealing arrangement is provided by means of which a central pneumatic conduit is alternatingly connected, after an operating stroke of the control slide, to a pneumatic conduit lying to the left and to the right of the central pneumatic conduit. The control valve further includes an operating sleeve longitudinally displaceable between two compression springs supported on the control slide and between two detent locations. The operating sleeve is arranged on the control slide in such a way that, upon operation of the operating sleeve, the control slide is braked as soon as sealing elements of the sealing arrangement abut against respective opposite valve seat surfaces.Type: GrantFiled: May 21, 1980Date of Patent: September 8, 1981Assignee: Daimler-Benz AktiengesellschaftInventors: Rudiger Hoffmann, Dieter Feichtiger
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Patent number: 4273027Abstract: A pneumatic actuating arrangement for to and fro movements, especially of a central locking system for motor vehicles, with an excess pressure source and with a vacuum source and with at least one pneumatic working device whose working chamber is adapted to be selectively connected to the excess pressure source or to the vacuum source by way of a shifting valve shiftable between two end positions. An intermediate for the shifting valve is provided in which position the shifting valve becomes temporarily effective during the transition from the one end position into the other end position so that the working chamber is conected to the atmosphere.Type: GrantFiled: June 1, 1978Date of Patent: June 16, 1981Assignee: Daimler-Benz AktiengesellschaftInventors: Theodor Reinhard, Ernst Haug, Rudiger Hoffmann, Dieter Feichtiger
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Patent number: 4219227Abstract: A latchable door lock for motor vehicles, whose catch element, in addition to be blocked by a locking pawl to be actuated manually, is to be blocked by a further latching element, whose blocking action can be lifted only by means of a fitting key; the further latching element thereby engages directly at the catch element without reaction on the locking pawl while the key-controlled commands are transmitted by way of lines to servo devices coordinated to the remaining doors and/or flaps and displacing the additional latching elements.Type: GrantFiled: February 1, 1979Date of Patent: August 26, 1980Assignee: Daimler-Benz AktiengesellschaftInventors: Christian Grabner, Rolf Krugener, Dieter Feichtiger, Rudiger Hoffmann, Hermann W. Kurth
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Patent number: 4215625Abstract: An adjusting drive operated by a pressure medium with a spring-loaded roller diaphragm secured to plates and displaceable within a housing by the pressure medium; the roller diaphragm actuates an adjusting member that is securely connected with a plate and extends out of the housing; in addition to its end positions, the adjusting member is also able to assume at least one intermediate position; the plates are thereby connected with each other by the roller diaphragm while a plate not directly connected with the adjusting member sealingly rests on a ring-shaped abutment projecting out of the inner wall of the housing in the intermediate position of the adjusting member.Type: GrantFiled: September 7, 1977Date of Patent: August 5, 1980Assignee: Daimler-Benz AktiengesellschaftInventors: Rudiger Hoffmann, Dieter Feichtiger
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Patent number: 4214192Abstract: In path control apparatus for a numerically controlled machine tool, a computer determines the trajectory to be traversed in space, resolves the latter by way of interpolation into the axial increments of the individual feed axes and performs complete position control for each axis. The interpolation is accomplished by the method of direct function computation, using travel distance increments proportional to the trajectory velocity. The position control is designed as a discrete control and operates with the premise that the minimum total computing cycle time is shorter than the sampling time of the fastest position control loop required by the control system.Type: GrantFiled: December 20, 1977Date of Patent: July 22, 1980Assignee: Siemens AktiengesellschaftInventors: Gunter Bromer, Horst Gose, Klaus-Rudiger Hoffmann, Christian Seeliger
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Patent number: 4181191Abstract: A pneumatic system for a central locking installation of motor vehicles with lines that conduct pressures to pneumatic elements, of which one each is coordinated to the parts to be locked, such as doors, tank lid, rear lid and/or front hood and the like, whereby key actuation of the locking mechanism at a vehicle door opens, respectively, closes the associated part(s); the pneumatic elements are constructed as single-chamber elements, to which excess pressure and vacuum are alternately fed through the same line; the excess pressure and vacuum are produced by a pump driven by an electric motor that is set into operation by a pulse transmitter engaged during the actuation of the locking mechanism of the driver door, and that is again automatically turned off after the termination of the opening or locking operation.Type: GrantFiled: April 4, 1978Date of Patent: January 1, 1980Assignee: Daimler-Benz AktiengesellschaftInventors: Rudiger Hoffmann, Dieter Feichtiger, Theodor Reinhard, Ernst Haug, Bernhard Schulze, Emil Bleibtreu
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Patent number: 4129143Abstract: A check valve, especially for vacuum-operated installations in motor vehicles, which includes a two-partite housing and a roller diaphragm secured between the housing parts provided with inlet and outlet channels; the roller diaphragm which is pressed against its sealing seat by a prestressed spring, cooperates by means of its ring-shaped, curved diaphragm portion as movable sealing part with the bottom of one housing part constructed as sealing seat in such a manner that a central bore provided in the section of the roller diaphragm located on the side of the spring, connects the inlet channel terminating outside of the curved diaphragm portion with the outlet channel of the housing part, when the curved diaphragm portion lifts off from the sealing seat upon exceeding a predetermined differential pressure.Type: GrantFiled: June 22, 1977Date of Patent: December 12, 1978Assignee: Daimler-Benz AktiengesellschaftInventor: Rudiger Hoffmann
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Patent number: 4121613Abstract: A vehicle with operationally conditioned vacuum loads and comfort vacuum loads, in which a central distributor box is provided that is equipped with a feed connection to connect a distributor chamber with a vacuum source; at least two load chambers are also provided in the distributor box, whereby each load chamber is connected with the distributor chamber by way of a protective valve opening in the direction to the distributor chamber against a spring force, and with a load connection which is in communication with a test connection that opens into the atmosphere after overcoming a spring-loaded valve.Type: GrantFiled: April 14, 1977Date of Patent: October 24, 1978Assignee: Daimler-Benz AktiengesellschaftInventors: Theodor Reinhard, Rudiger Hoffmann, Ernst Haug
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Patent number: 4058623Abstract: Lyophilized prostaglandin-containing powders are stabilized with tris(hydroxymethyl)-aminomethane hydrochloride.Type: GrantFiled: March 22, 1976Date of Patent: November 15, 1977Assignee: Schering AktiengesellschaftInventors: Rolf-Rudiger Hoffmann, Peter Fuchs
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Patent number: 3994525Abstract: A roof for a motor vehicle, particularly a passenger motor vehicle which possesses an area to be opened intermediate the windshield and a roll-over girder disposed within the area of the rear window; the area to be opened in the roof is subdivided into two sections which are adapted to be displaced telescopically and can be retracted one within the other into the area of the roll-over girder so as to be completely covered by the outer member of the roll-over girder; the roll-over girder together with the outer covering member thereby preferably forms a hollow body.Type: GrantFiled: January 15, 1975Date of Patent: November 30, 1976Assignee: Daimler-Benz AktiengesellschaftInventors: Werner Breitschwerdt, Rudiger Hoffmann, Werner Heiss, Gunter Siegel, Hans P. Spreng, Johann Tomforde, Axel Stehle
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Patent number: 3990322Abstract: A hand brake arrangement for motor vehicles with a storage tray arranged between the front seats thereof, preferably on a center tunnel, in which the hand brake lever is so intergrated into the storage tray that it simultaneously serves as a part of the side wall thereof.Type: GrantFiled: June 27, 1975Date of Patent: November 9, 1976Assignee: Daimler-Benz AktiengesellschaftInventor: Rudiger Hoffmann