Patents by Inventor Robert Alan Anderson

Robert Alan Anderson 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: 6935110
    Abstract: A tandem master cylinder in which fluid under pressure is supplied to a primary outlet port from a primary pressure space in a bore between a positively actuated main piston and a floating or secondary piston, and to a secondary outlet port from a secondary pressure space between the floating or secondary piston and an end of a housing closing the bore, the position of the primary piston with respect to the secondary piston being determined by the length in a released position of a return spring which acts between the two pistons, the return spring being caged between the main position and a sleeve in abutment with the secondary piston and which is coupled to the main piston through an axially extending headed stem to determine a defined position, further in which the distal end of the stem is of a reduced diameter and a shoulder at the step in diameter defines a cutting edge, insertion of the stem into a bore in the main piston of a diameter not less of that of the distal end causing the cutting edge to cut
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: August 30, 2005
    Assignee: TRW Limited
    Inventor: Robert Alan Anderson
  • Publication number: 20040255578
    Abstract: A tandem master cylinder in which fluid under pressure is supplied to a primary outlet port from a primary pressure space in a bore between a positively actuated main piston and a floating or secondary piston, and to a secondary outlet port from a secondary pressure space between the floating or secondary piston and an end of a housing closing the bore, the position of the primary piston with respect to the secondary piston being determined by the length in a released position of a return spring which acts between the two pistons, the return spring being caged between the main position and a sleeve in abutment with the secondary piston and which is coupled to the main piston through an axially extending headed stem to determine a defined position, further in which the distal end of the stem is of a reduced diameter and a shoulder at the step in diameter defines a cutting edge, insertion of the stem into a bore in the main piston of a diameter not less of that of the distal end causing the cutting edge to cut
    Type: Application
    Filed: June 16, 2004
    Publication date: December 23, 2004
    Inventor: Robert Alan Anderson
  • Patent number: 6745665
    Abstract: In a solenoid-controlled valve assembly a biasing means (21) is adapted to apply a resisting force to a spool (22) in a direction opposite to the direction substantially of a force applied by an armature (14), and engagement between at least one of the spool and the biasing means and the spool and the armature is through an engagement means defining a single point of contact. The spool (22) may be provided with at least one land adapted to connect and disconnect two flow passages (6, 8), and the first ends of the two passages are spaced apart in a direction parallel to the axis of the bore by a smaller distance than the spacing between the second ends of the passages.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: June 8, 2004
    Assignee: Lucas Industries Limited
    Inventor: Robert Alan Anderson
  • Publication number: 20030084947
    Abstract: In a solenoid-controlled valve assembly a biasing means (21) is adapted to apply a resisting force to a spool (22) in a direction opposite to the direction substantially of a force applied by an armature (14), and engagement between at least one of the spool and the biasing means and the spool and the armature is through an engagement means defining a single point of contact. The spool (22) may be provided with at least one land adapted to connect and disconnect two flow passages (6, 8), and the first ends of the two passages are spaced apart in a direction parallel to the axis of the bore by a smaller distance than the spacing between the second ends of the passages.
    Type: Application
    Filed: November 19, 2002
    Publication date: May 8, 2003
    Inventor: Robert Alan Anderson
  • Patent number: 6481332
    Abstract: In a solenoid-controlled valve assembly a biasing means (21) is adapted to apply a resisting force to a spool (22) in a direction opposite to the direction substantially of a force applied by an armature (14), and engagement between at least one of the spool and the biasing means and the spool and the armature is through an engagement means defining a single point of contact. The spool (22) may be provided with at least one land adapted to connect and disconnect two flow passages (6, 8), and the first ends of the two passages are spaced apart in a direction parallel to the axis of the bore by a smaller distance than the spacing between the second ends of the passages.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: November 19, 2002
    Assignee: Lucas Industries Limited
    Inventor: Robert Alan Anderson
  • Patent number: 6439673
    Abstract: In an electro-hydraulic braking system a housing is provided having at least three discrete housing portions (1, 2, 3), a first portion being adapted to contain electrical drive circuitry for said at least one actuator, the second portion being adapted to contain hydraulic flow passages to and from the electrically operated actuator, and the third portion being adapted to house one or more pressure sensors. On assembly of the housing, electrical contacts from the one or more pressure sensors in the third portion provide a connection between the one or more pressure sensors and the electrical circuitry contained in the first portion, and hydraulic passages extending from the pressure sensors in the third portion provide a connection between one or more pressure sensors and fluid passages in the second portion.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: August 27, 2002
    Assignee: Lucas Industries Limited
    Inventor: Robert Alan Anderson
  • Patent number: 6361122
    Abstract: In a pedal assembly for a brake-by-wire vehicle braking system, feedback reaction means (10) is provided so that feedback to the driver through the pedal (3) provides comfortable feel, similar to the pedal feel achieved in a conventional hydraulic braking system fitted to a non-EBS equipped vehicle. The feedback reaction means may comprise a two-rate spring assembly (24, 26) or a variable rate spring assembly, in combination with a damper (40).
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: March 26, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Robert Alan Anderson, Stephen Donald Crisp, Barry John Bridgens, Michael James Ayres
  • Publication number: 20010043009
    Abstract: In a pedal assembly for a brake-by-wire vehicle braking system, feedback reaction means (10) is provided so that feedback to the driver through the pedal (3) provides comfortable feel, similar to the pedal feel achieved in a conventional hydraulic braking system fitted to a non-EBS equipped vehicle. The feedback reaction means may comprise a two-rate spring assembly (24, 26) or a variable rate spring assembly, in combination with a damper (40).
    Type: Application
    Filed: April 23, 1997
    Publication date: November 22, 2001
    Inventors: ROBERT ALAN ANDERSON, STEPHEN DONALD CRISP, BARRY JOHN BRIDGENS, MICHAEL JAMES AYRES
  • Publication number: 20010030461
    Abstract: In an electro-hydraulic braking system a housing is provided having at least three discrete housing portions (1, 2, 3), a first portion being adapted to contain electrical drive circuitry for said at least one actuator, the second portion being adapted to contain hydraulic flow passages to and from the electrically operated actuator, and the third portion being adapted to house one or more pressure sensors. On assembly of the housing, electrical contacts from the one or more pressure sensors in the third portion provide a connection between the one or more pressure sensors and the electrical circuitry contained in the first portion, and hydraulic passages extending from the pressure sensors in the third portion provide a connection between one or more pressure sensors and fluid passages in the second portion.
    Type: Application
    Filed: March 23, 2001
    Publication date: October 18, 2001
    Inventor: Robert Alan Anderson
  • Publication number: 20010029986
    Abstract: In a solenoid-controlled valve assembly a biasing means (21) is adapted to apply a resisting force to a spool (22) in a direction opposite to the direction substantially of a force applied by an armature (14), and engagement between at least one of the spool and the biasing means and the spool and the armature is through an engagement means defining a single point of contact. The spool (22) may be provided with at least one land adapted to connect and disconnect two flow passages (6, 8), and the first ends of the two passages are spaced apart in a direction parallel to the axis of the bore by a smaller distance than the spacing between the second ends of the passages.
    Type: Application
    Filed: March 23, 2001
    Publication date: October 18, 2001
    Inventor: Robert Alan Anderson
  • Patent number: 5921640
    Abstract: An hydraulic braking system is disclosed which comprises a fluid source and brake actuators, wherein a first master control valve is provided to supply substantially equal pressures to all brake actuators and additional control valves are provided to regulate pressures applied to respective ones of said brake actuators. The first control valve and the additional control valves are provided in series between the fluid source and the brake actuators so that operation of the master control valve allows equal hydraulic pressures to be applied to each actuator while the additional control valves allow individual brake regulation and in an emergency operation of the master control valve allows for automatic operation of all the actuators.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: July 13, 1999
    Assignee: Lucas Industries Public, Ltd.
    Inventors: Ivan Mortimer, Robert Alan Anderson