Patents Represented by Attorney James B. Raden
  • Patent number: 4954154
    Abstract: Methylene diurea, either alone or as a component of methylene urea polymers acts as a gelling agent for producing a gel composition capable of suspending particles which are insoluble in a liquid medium. Methylene diurea as the gelling agent in a liquid medium can be used to obtain novel gel compositions in the absence of added thickener-suspending agents. The methylene diurea is present in an amount greater than the solubility limit of methylene diurea in the liquid medium and in an amount sufficient to provide a gel for suspending insoluble particles. The process for producing the gel composition includes subjecting a dry methylene urea composition in particulate form to a shearing action in a liquid medium wherein the methylene urea includes an amount of methylene diurea greater than the solubility limit of methylene diurea in the liquid medium.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: September 4, 1990
    Assignee: The O. M. Scott & Sons Company
    Inventor: Harvey M. Goertz
  • Patent number: 4888012
    Abstract: An intraocular lens assembly for implantation into a posterior eye chamber is provided having a central lens and an outer ring interconnected therewith. The assembly when implanted is operatively engaged by the ciliary muscle of the eye which causes changes in the focusing power of the lens in order to achieve accommodation.
    Type: Grant
    Filed: January 14, 1988
    Date of Patent: December 19, 1989
    Inventors: Gerald Horn, Kenneth Spears
  • Patent number: 4869559
    Abstract: In a brake-slip-controlled automotive vehicle brake system, a pedal-operated master cylinder is provided which applies hydraulic fluid to the wheel brake circuits via at least one braking pressure modulator and via one electromagnetically operated closing valve at a time. The pressure modulator comprises a volume receiver and a pneumatic piston-and-cylinder arrangement acting on the volume receiver and connected with a vacuum source and a pressure source via a change-over valve actuated by a brake slip control circuit. Inserted into each hydraulic line between the master cylinder and the pressure modulator is an electromagnetically operated pilot valve having a normal operating position and a suction position. A traction slip control circuit switches the pilot valves over upon the occurrence of traction slip and ensures that the pressure modulator is reversed to the direction of increasing volume admission.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: September 26, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Hans-Christof Klein
  • Patent number: 4867280
    Abstract: A brake system of the type having a disc-type wheel brake hydraulically operated by a master cylinder through connecting lines is disclosed. The system includes a member which divides the wheel brake into two chambers, one adjacent to the brake piston filled with a hydraulic fluid specifically formulated for meeting certain expected operating conditions in the wheel brakes. The second chamber is connected to the hydraulic lines and is filled with a second fluid specially formulated for meeting certain other different expected operating conditions in the lines and master cylinder.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: September 19, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Hubertus Von Gruenberg, Karl Stoerzel
  • Patent number: 4856852
    Abstract: In a brake system with slip control comprising a pedal-actuated vacuum booster and a dual-circuit master cylinder, to which the wheel brakes are connected via brake lines, comprises an auxiliary-pressure source with a hydraulic pump and a pressure-compensating and pressure-fluid supply reservoir wheel sensors and electronic circuits for determining the wheel rotational behavior and for generating electric braking-pressure control signals which serve to control electromagnetically actuatable pressure-fluid inlet valves and outlet valves inserted into the brake lines and into the supply line for slip control, a valve is provided in order to control the auxiliary pressure and to adapt same to the pressure in the pressure chambers of the master cylinder.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: August 15, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Norbert Ocvirk, Lutz Weise
  • Patent number: 4850825
    Abstract: A radial piston pump with at least one pair of pistons which alternately perform working strokes and are arranged in a stationary cylinder block with working chambers comprising inlet valves and outlet valves. An eccentric shaft controls the radial movement of the pistons and an annular device connects the radially outward end portions of the pistons. To avoid friction between eccentric and pistons, provisions are made that the eccentric shaft is supported outside of the cylinder block. The radially outward end portions of the pistons project radially outwardly from the cylinders and, by way of the annular device, take support on the eccentric of the eccendtric shaft. The eccentric is rotatably supported in the annular device.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: July 25, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Ludwig Budecker
  • Patent number: 4848848
    Abstract: A vehicle brake system comprises two pressure modulators (16, 18) one of which (16) is associated with one of the brake circuits (12) and the other of which (18) is associated with the other (14) of the brake circuits. The modulators (16, 18) are accommodated in a housing, preferably in the form of a twin arrangement, and are actuated by means of a common drive unit. The pressure modulators (16, 18) each include a plunger piston (78) which is acted on by a differential gear in the common drive unit. In a first embodiment, a vacuum servo drive (20) serves as the drive unit and the differential gear comprises a linear guiding element (106) and an angular lever (112) articulated thereto. The force required to hold down the plunger pistons (78) in their initial position can be applied mainly pneumatically. A ventilatable chamber (M2) of the vacuum servo drive (20) being connected for that purpose with the ventilatable working chamber (B2) of a vacuum brake power booster (32 ).
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: July 18, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Han-Christof Klein
  • Patent number: 4849728
    Abstract: The invention provides an iduction generator comprising a plastic injection-molded housing having a port and one or more pole shoe(s) associated with a permanent magnet. A plastic bobbin inserted into the port and having a coil wound thereon which, through soldering eyelets, is connected to two contact tags in communication with an outwardly guided cable. A mounting member, with the port at the end thereof facing the soldering eyelets being closely sealed by a lid welded to the housing.To provide an induction generator that is easy to manufacture and that insures a substantially improved operation, the port of the housing at the end thereof facing away from the soldering eyelets is closed by a bottom integrally formed with the housing and the pole shoe or shoes along with the associated permanent magnet are integrated in the housing.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: July 18, 1989
    Assignee: Alfred Eves, GmbH
    Inventors: Manfred Goll, Erkenbert Wehner
  • Patent number: 4848847
    Abstract: A pressure supply system for the generation of the auxiliary pressure of a hydraulic brake system for motor vehicles comprises an accumulator, a hydraulic pump driven by electromotive force and a pressure switch (1) controlling the turning on and off of the hydraulic pump. The pressure switch (1) includes a switch piston (2) having a piston rod (5) mechanically actuating in a pressure-responsive manner, successively, two or three switches (8,9,10). The pump motor (26), by way of these switches, and by way of a relay, is turned on when a bottom pressure limit value (P.sub.U) is reached, and turned off when the upper pressure limit value (P.sub.O) is reached and exceeded. A holding circuit is connected in the electric circuit, in which are provided the switches (8,9,10) of the pressure switch (1), which holding circuit ensures an abrupt switch-over of the relay into the other switching position when a slow approach of a pressure (p) to the pressure limit values (p.sub.U, P.sub.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: July 18, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Hans D. Reinartz, Helmut Steffes, Franz Latka
  • Patent number: 4844557
    Abstract: A circuit configuration for brake systems with anti-lock control and/or traction slip control is equipped with circuits for cornering identification and for generating signals characteristic of cornering. The differential speed between the wheels of one axle is measured. The speed difference signal is standardized. An error signal which is system-inherent and occurs also when driving straight ahead is generated by means of a low pass filter having a long time constant. The difference between the standardized speed difference signal and the error signal represents the cornering signal. Further, a quantity depending upon the speed of a wheel is compared with the cornering signal and checked for reasonableness. A second reasonableness check is based on the comparison and the evaluation of the cornering signals which were generated by the front axle and the rear axle irrespective of one another.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: July 4, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Bernhard Giers
  • Patent number: 4844556
    Abstract: A method and electronic circuit for use in an automotive vehicle brake system with electronic anti-lock control and/or traction slip control is equipped with circuits for identifying a state of vehicle cornering. The slip of the controlled wheel during the time intervals in which the wheel is running stably, and the control frequency or the duration of the control cycles are measured. If the wheel slip exceeds a constant predetermined limit value or a value which depends on the velocity of the vehicle, and if, simultaneously, the control cycles are short on identification of vehicle cornering and corresponding signal is generated.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: July 4, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Helmut Fennel, Norbert Ehmer
  • Patent number: 4842340
    Abstract: A brake slip control system for trailers equipped with overrun brakes is disclosed, in order to make the brake device independent of the towing vehicle, the pressure fluid source is arranged at the trailer.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: June 27, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Bernhard Kullmann, James Remfrey, Klaus Schlechtriem
  • Patent number: 4842103
    Abstract: An automatic adjusting device for a disc brake having a brake piston displaceably arranged in a brake cylinder for the purpose of actuation of a brake shoe. This device which is actuatable by means of a hydraulic and a mechanical actuating device, includes an adjusting member between the brake piston and the mechanic actuating device which member is composed of two adjusting elements, an adjusting spindle and adjusting nut interconnected via a thread without self-locking engagement. It further comprises a friction clutch having conical friction surfaces for fixing one of the adjusting elements in position on mechanical actuation. One of the conical friction surfaces is on one of the adjusting elements and the other friction surface is on a mechanically actuatable clamping member. It also comprises a bowl-type (cup-shaped) spring retainer which is secured to the brake housing by means of an accommodation sleeve.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: June 27, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Rolf Weiler, Claus-Peter Panek, Bodo Schmidt
  • Patent number: 4843193
    Abstract: To improve the denseness of a reservoir telltale sounding device of a reservoir for a hydraulic brake system, while reducing the costs of manufacture and assembly, the plug portion comprises a first face and a second face which are respectively connected, in liquid-tight manner, to the housing of the reservoir telltale sounding device and the cover.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: June 27, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Ludwig Budecker, Gerd Klostermann
  • Patent number: 4840433
    Abstract: Disclosed is a pressure control device including a housing incorporating a pressure control valve which governs a connection between a pressure-fluid inlet and a pressure-fluid outlet. Included is a deceleration-responsively movable inertia member, and control piston arranged in the housing and being slidable in dependence upon the pressure of the pressure fluid and the position of the inertia member and acting upon the pressure control valve. In order to provide for a pressure control device which is more cost-efficient and which switches precisely irrespective of the viscosity and the flow velocity of the pressure fluid, the inertia member is arranged in a chamber of the pressure control device which is substantially free from pressure fluid and the inertia member controls a valve which isolates a compartment confined by the housing and the control pisotn from the chamber.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Juergen Schonlau, Alfred Birkenbach, Ralf Harth
  • Patent number: 4841158
    Abstract: A safety relay circuit for operating electric systems of automotive vehicles is disclosed. The circuit includes two series-connected change-over relays connecting the vehicle's electrical system to the operative voltage. The change-over relays are actuated by switches acted upon by a control circuit. The control circuit assures that the change-over relays are actuated alternatively.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Franz Latka
  • Patent number: 4840436
    Abstract: An anti-lock brake system with traction slip control includes a pedal-actuated, auxiliary-force-assisted braking pressure generator having a master cylinder to which the wheel brakes are connected by main brake lines, auxiliary-pressure hydraulic pumps, wheel sensors and electronic circuits for determining the wheel rotational behavior and for generating electric braking-pressure control signals which, for the purpose of brake slip control, serve to control electromagnetically actuatable pressure-fluid inlet valves and outlet valves provided in the pressure-fluid lines. Pistons of the master cylinder include central control valves which, in the brake's release position, open pressure-fluid connections between the pressure-fluid supply reservior and the pressure chambers and which, in the braking position, close the pressure-fluid connections. The brake lines communicate through supply lines with the pumps.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Jochen Burgdorf, Hans-Dieter Reinartz, Lutz Weise, Norbert Ocvirk, Horst P. Becker, Otto Determann
  • Patent number: 4840435
    Abstract: A hydraulic brake system in which a hydraulic line between the master brake cylinder and the wheel brake cylinders is free from hydraulic closing means. Upstream of a non-return valve in a line connecting a hydraulic pump and said hydraulic line, there is a hydraulic communication between the outlet of the hydraulic pump and an inlet of a pressure control valve which is actuatable in dependence on the volume of the working chamber, the control valve being a storage reservoir. A hydraulic branch is also provided between the master cylinder and the wheel brake cylinders, which leads to the inlet of an electromagnetic valve; the outlet of which ends in the storage reservoir. A cross-section in the hydraulic line is smaller between the hydraulic branch and the working chamber than between the closing valve and the wheel brake cylinders of the pair of wheel brake cylinders.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Helmut Steffes
  • Patent number: 4840193
    Abstract: Disclosed is an electromagnetically actuatable three-way/two-position directional control valve for alternatively connecting an outlet port to a first or to a second inlet port. The connection is established by way of a valve chamber with which the outlet port is in direct communication. The inlet ports each communicate with the valve chamber by way of sealing seats adapted to be closed or opened by means of a movable valve closure member. At least one electromagnet whose housing accommodates a magnet coil as well as a slidably disposed armature which, when the electromagnet is excited, actuates the valve closure member by way of a valve-actuating tappet. A connection is established between the second inlet port and the outlet port in the inactive position of the valve closure member.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventor: Lothar Schiel
  • Patent number: 4841107
    Abstract: Disclosed is a device for indicating the filling level in a fluid reservoir of a hydraulic brake system, wherein a magnet is arranged in a radial recess of the float with the side walls of the recess being provided with retaining means for securing the magnet in its installed position.
    Type: Grant
    Filed: May 3, 1988
    Date of Patent: June 20, 1989
    Assignee: Alfred Teves GmbH
    Inventors: Peter Tandler, Rudolf Cezanne