Patents by Inventor Robert David Prescott
Robert David Prescott 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: 9694802Abstract: A valve assembly including a housing and a first movable member which divides the housing into a control chamber and a main chamber. A second movable member has a first valve part and a second valve part and is movable to engage the first valve part with a corresponding inlet valve part to substantially prevent flow of fluid into the main chamber via an inlet port. The first movable member is provided with an exhaust valve part and is movable to engage the second valve part of the second movable member to substantially prevent flow of pressurized fluid out of the main chamber via an exhaust port. A support part is secured relative to the housing, there being a first seal between the second movable member and the support part and a second seal between the support part and the first movable member.Type: GrantFiled: December 13, 2012Date of Patent: July 4, 2017Assignee: Haldex Brake Products LimitedInventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Patent number: 9242627Abstract: A valve assembly (110) having a housing (124) into which are provided a first port (112), a second port (114) and a third port (116), and in which are located a first movable member (126), a second movable member (132) and a third movable member (152), the first movable member (126) being movable between a first position which causes the second movable member (132) to close the first port (112) to prevent any substantial flow of fluid through the first port (112), whilst the second (114) and third (116) ports remain open, a second position which causes the third movable member (152) to close the third port (116) to prevent any substantial flow of fluid through the third port (116), whilst the first (112) and second (114) ports remain open and flow of fluid between the first (112) and the second (114) part is permitted, and a third position which causes the second movable member (132) to close the first port (112) and the third movable member (152) to close the third port (116) to prevent any substantial flowType: GrantFiled: June 1, 2011Date of Patent: January 26, 2016Assignee: HALDEX BRAKE LIMITEDInventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Patent number: 9080677Abstract: A valve assembly comprising an inner housing in which is provided a first port, a second port, and a third port, and a valve member assembly which is movable between a first position, a second position, and a third position. An outer housing is separate from and encloses at least part of the inner housing, the outer housing having a first port and a second port, the Inner housing and outer housing each being provided with first mating parts, which engage to provide a substantially fluid tight seal while enclosing a conduit for fluid communication between the first port of the inner housing and the first port of the outer housing, and second mating parts, which engage to provide a substantially fluid tight seal while enclosing a conduit for fluid communication between the second port of the Inner housing and the second port of the outer housing.Type: GrantFiled: December 14, 2012Date of Patent: July 14, 2015Assignee: Haldex Brake Products LimitedInventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Publication number: 20150123460Abstract: A valve assembly including a housing and a first movable member which divides the housing into a control chamber and a main chamber. A second movable member has a first valve part and a second valve part and is movable to engage the first valve part with a corresponding inlet valve part to substantially prevent flow of fluid into the main chamber via an inlet port. The first movable member is provided with an exhaust valve part and is movable to engage the second valve part of the second movable member to substantially prevent flow of pressurised fluid out of the main chamber via an exhaust port. A support part is secured relative to the housing, there being a first seal between the second movable member and the support part and a second seal between the support part and the first movable member.Type: ApplicationFiled: December 13, 2012Publication date: May 7, 2015Inventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Publication number: 20140345728Abstract: A valve assembly comprising an inner housing in which is provided a first port, a second port, and a third port, and a valve member assembly which is movable between a first position, a second position, and a third position. An outer housing is separate from and encloses at least part of the inner housing, the outer housing having a first port and a second port, the Inner housing and outer housing each being provided with first mating parts, which engage to provide a substantially fluid tight seal whilst enclosing a conduit for fluid communication between the first port of the inner housing and the first port of the outer housing, and second mating parts, which engage to provide a substantially fluid tight seal whilst enclosing a conduit for fluid communication between the second port of the Inner housing and the second port of the outer housing.Type: ApplicationFiled: December 14, 2012Publication date: November 27, 2014Inventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Patent number: 8851243Abstract: A brake actuator (10) having a housing (12) in which is provided a movable brake actuating assembly (18, 30), the brake actuating assembly (18, 30) being movable between a brake apply position which, in use results in the application of a brake to which the actuator (10) connected, and a brake release position which, in use, results in the release of the brake, the brake actuator (10) further including a lock (34) which is operable to prevent movement of the brake actuating assembly (18, 30) from the brake apply position to the brake release position, the brake actuating assembly (18, 30) including a first movable member (18), a second movable member (30) and a resilient biasing element (32) which extends between the second movable member (30) and the first movable member (18) and which, if one of the first or second movable members (18, 30) is moved relative to the other from an equilibrium separation, exerts a force tending to return the first (18) and second (30) movable members to the equilibrium separatiType: GrantFiled: March 29, 2010Date of Patent: October 7, 2014Assignee: Haldex Brake Products LimitedInventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Patent number: 8777332Abstract: A braking control system comprising a first source of pressurized fluid (82a), a second source of pressurized fluid (82b), a modulator (70), a brake actuator (10), and a plurality of valves (84, 94, 96, 98), the modulator (70) having a supply inlet (72) which may be connected to either of the sources of pressurized fluid via a first fluid flow line which extends between a first one of the valves (84) and the supply inlet (72), and a control inlet (78) which may be connected to either of the sources of pressurized fluid via a second fluid flow line and a second one of the valves (94), a delivery port (74) which is connected an inlet (11) of the actuator (10), and an exhaust outlet (76) which vents to a low pressure region, the modulator (70) being operable to move between a build position in which flow of fluid from the supply inlet (72) to the delivery port (74) is permitted while flow of fluid through the exhaust outlet (76) is substantially prevented, and an exhaust position in which flow of fluid between tType: GrantFiled: February 23, 2010Date of Patent: July 15, 2014Assignee: Haldex Brake Products LimitedInventors: Laurence John Potter, Robert David Prescott, Edward Gilbert Shaw
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Publication number: 20130263953Abstract: A valve assembly (110) having a housing (124) into which are provided a first port (112), a second port (114) and a third port (116), and in which are located a first movable member (126), a second movable member (132) and a third movable member (152), the first movable member (126) being movable between a first position which causes the second movable member (132) to close the first port (112) to prevent any substantial flow of fluid through the first port (112), whilst the second (114) and third (116) ports remain open, a second position which causes the third movable member (152) to close the third port (116) to prevent any substantial flow of fluid through the third port (116), whilst the first (112) and second (114) ports remain open and flow of fluid between the first (112) and the second (114) part is permitted, and a third position which causes the second movable member (132) to close the first port (112) and the third movable member (152) to close the third port (116) to prevent any substantial flowType: ApplicationFiled: June 1, 2011Publication date: October 10, 2013Applicant: HALDEX BRAKE PRODUCTS LIMITED, LC OF UKInventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Publication number: 20120031717Abstract: A brake actuator (10) having a housing (12) in which is provided a movable brake actuating assembly (18, 30), the brake actuating assembly (18, 30) being movable between a brake apply position which, in use results in the application of a brake to which the actuator (10) connected, and a brake release position which, in use, results in the release of the brake, the brake actuator (10) further including a lock (34) which is operable to prevent movement of the brake actuating assembly (18, 30) from the brake apply position to the brake release position, the brake actuating assembly (18, 30) including a first movable member (18), a second movable member (30) and a resilient biasing element (32) which extends between the second movable member (30) and the first movable member (18) and which, if one of the first or second movable members (18, 30) is moved relative to the other from an equilibrium separation, exerts a force tending to return the first (18) and second (30) movable members to the equilibrium separatiType: ApplicationFiled: March 29, 2010Publication date: February 9, 2012Inventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Publication number: 20120024642Abstract: A brake actuator and control valve assembly, the brake actuator (10) having a housing (12) in which is provided a movable assembly (18, 20, 30) including: a brake actuating element (20) which is adapted, in use to be connected to a vehicle brake, the movable assembly (18, 20, 30) being movable from a brake apply position which, in use, results in the application of the brake, and a brake release position which, in use, results in the release of the brake, the brake actuator (10) further including a lock (34, 44, 46) which is operable to change from a locked configuration in which movement of the movable assembly (18, 20, 30) from the brake apply position to the brake release position is prevented, and a released configuration in which movement of the movable assembly (18, 20, 30) from the brake apply position to the brake release position is permitted, wherein the lock (34, 44, 46) includes a fluid pressure operated actuator (34), supply of pressurised fluid to which results in the lock changing from either tType: ApplicationFiled: March 29, 2010Publication date: February 2, 2012Inventors: Robert David Prescott, Laurence John Potter, Edward Gilbert Shaw
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Publication number: 20120019054Abstract: A braking control system comprising a first source of pressurised fluid (82a), a second source of pressurised fluid (82b, 90), a modulator (70), a brake actuator (10), and a plurality of valves (84, 94, 96, 98), the modulator (70) having a supply inlet (72) which may be connected to either of the sources of pressurised fluid via a first fluid flow line which extends between a first one of the valves (84) and the supply inlet (72), and a control inlet (78) which may be connected to either of the sources of pressurised fluid via a second fluid flow line and a second one of the valves (94), a delivery port (74) which is connected an inlet (11) of the actuator (10), and an exhaust outlet (76) which vents to a low pressure region, the modulator (70) being operable to move between a build position in which flow of fluid from the supply inlet (72) to the delivery port (74) is permitted whilst flow of fluid through the exhaust outlet (76) is substantially prevented, and an exhaust position in which flow of fluid betwType: ApplicationFiled: February 23, 2010Publication date: January 26, 2012Inventors: Laurence John Potter, Robert David Prescott, Edward Gilbert Shaw
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Publication number: 20110198164Abstract: A braking system including a source of pressurised fluid, an actuator, and a fastener for securing the source of pressurised fluid to the actuator, the fastener having a substantially hollow portion to enable fluid communication between the actuator and the source of pressurised fluid.Type: ApplicationFiled: March 18, 2011Publication date: August 18, 2011Inventors: Laurence John Potter, Robert David Prescott
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Patent number: 7765049Abstract: A braking system including a brake, a brake actuator which is operable to apply a force to the brake to effect braking, an automatic braking controller, and a manually operable brake actuator control device, the brake actuator control device including a manually operable control part which is movable between a release position and an apply position and which is adapted such that movement of the control part by a user from the release position to the apply position causes the brake actuator to apply the brake and movement of the control part by a user from the apply position to the release position causes the brake actuator to release the brake, the brake actuator control device being characterized in that it further includes a control actuator which engages with the control part and which is adapted to effect movement of the control part from the release position to the apply position on receipt of an appropriate signal from the automatic braking controller.Type: GrantFiled: March 5, 2008Date of Patent: July 27, 2010Assignee: Haldex Brake Products Ltd.Inventors: Laurence John Potter, Robert David Prescott
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Publication number: 20080215222Abstract: A braking system including a brake, a brake actuator which is operable to apply a force to the brake to effect braking, an automatic braking controller, and a manually operable brake actuator control device, the brake actuator control device including a manually operable control part which is movable between a release position and an apply position and which is adapted such that movement of the control part by a user from the release position to the apply position causes the brake actuator to apply the brake and movement of the control part by a user from the apply position to the release position causes the brake actuator to release the brake, the brake actuator control device being characterised in that it further includes a control actuator which engages with the control part and which is adapted to effect movement of the control part from the release position to the apply position on receipt of an appropriate signal from the automatic braking controller.Type: ApplicationFiled: March 5, 2008Publication date: September 4, 2008Inventors: Laurence John Potter, Robert David Prescott
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Patent number: 7395906Abstract: A brake actuator including a chamber in which is provided a movable pressure responsive element which divides the chamber into first and second compartments, the brake actuator also including a valve assembly with an inlet which is connected to a source of pressurised fluid, an outlet which is connected to a volume within the brake actuator not including the second compartment, and an exhaust port through which fluid from the volume may be released, wherein the exhaust port of the valve assembly is connected to the second compartment.Type: GrantFiled: January 8, 2007Date of Patent: July 8, 2008Assignee: Haldex Brake Products Ltd.Inventors: Laurence John Potter, Robert David Prescott
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Patent number: 7353097Abstract: An electrical control network is laid over one or more vehicle dynamics control and/or ride control systems of a heavy vehicle, which control network controls actuation of components thereof. The invention offers many advantages including reduction of components, simplified design, unified communication for numerous different types of system components, simplified resolution of conflicts between competing control strategies, expandability to additional vehicle systems, and flexibility to upgrade for new, improved vehicle control schemes.Type: GrantFiled: August 25, 2005Date of Patent: April 1, 2008Assignee: Haldex Brake Products Ltd.Inventors: Paul Bale, Robert David Prescott
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Patent number: 7293842Abstract: An electrical control network is laid over one or more vehicle dynamics control and/or ride control systems of a heavy vehicle, which control network controls actuation of components thereof. The invention offers many advantages including reduction of components, simplified design, unified communication for numerous different types of system components, simplified resolution of conflicts between competing control strategies, expandability to additional vehicle systems, and flexibility to upgrade for new, improved vehicle control schemes.Type: GrantFiled: September 26, 2003Date of Patent: November 13, 2007Assignee: Haldex Brake Products Ltd.Inventors: Paul Bale, Robert David Prescott, Peter Nilsson, Anders Lindqvist
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Patent number: 6959968Abstract: An electrical control network is laid over one or more vehicle dynamics control and/or ride control systems of a heavy vehicle, which control network controls actuation of components thereof. The invention offers many advantages including reduction of components, simplified design, unified communication for numerous different types of system components, simplified resolution of conflicts between competing control strategies, expandability to additional vehicle systems, and flexibility to upgrade for new, improved vehicle control schemes.Type: GrantFiled: July 2, 2003Date of Patent: November 1, 2005Assignee: Haldex Brake Products Ltd.Inventors: Paul Bale, Robert David Prescott