Patents by Inventor Wenqi Qian
Wenqi Qian 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: 9291227Abstract: A brake assembly for use on vehicles includes a rotor having connection tabs and a hub having bobbins, integrally formed or separate, with the rotor connection tabs being positioned between the hub bobbins and clamped together with a top plate. An ABS tone ring is fastened to the hub and is circumscribed by the rotor. Alternatively, an ABS tone ring can be formed as part of the top plate. A spring clip can be used with the top plate to accommodate thermal expansion of the rotor and eliminate rotor rattling. Torque is transferred from the brake rotor to the hub in a common plane to prevent twisting in the fastener connection.Type: GrantFiled: October 2, 2006Date of Patent: March 22, 2016Assignee: PERFORMANCE FRICTION CORPORATIONInventors: Donald Burgoon, Wenqi Qian, Scott Andrew Paul, Craig A. Van Harken
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Patent number: 8651247Abstract: A wheel bearing hub and disc brake rotor assembly for use on vehicles includes a rotor (14) and a wheel mount (24), formed as a package bearing, fastened to the rotor with a connection assembly that promotes in plane torque transfer. The rotor has a flange form as a series of spaced tabs (20), and the wheel bearing hub (14) has a shoulder with complementary spaced tabs (34). The rotor is connected to the bearing hub by clamping a bridge (42) that spans the shoulder tabs over the rotor tabs. A spring clip (50) can be use with the bridge to accommodate thermal expansion of the rotor and eliminate rattling. Torque is transferred from the brake rotor to the bearing hub in a common plane to prevent twisting. In one embodiment, the bearing hub shoulder tabs may be formed by milling or machining slots. In another embodiment, the bearing hub shoulder tabs may be formed by fine-blanking or stamping slots.Type: GrantFiled: April 3, 2006Date of Patent: February 18, 2014Assignee: Performance Friction CorporationInventors: Donald Burgoon, Wenqi Qian
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Publication number: 20090218183Abstract: A brake assembly for use on vehicles includes a rotor having connection tabs and a hub having bobbins, integrally formed or separate, with the rotor connection tabs being positioned between the hub bobbins and clamped together with a top plate. An ABS tone ring is fastened to the hub and is circumscribed by the rotor. Alternatively, an ABS tone ring can be formed as part of the top plate. A spring clip can be used with the top plate to accommodate thermal expansion of the rotor and eliminate rotor rattling. Torque is transferred from the brake rotor to the hub in a common plane to prevent twisting in the fastener connection.Type: ApplicationFiled: October 2, 2006Publication date: September 3, 2009Applicant: PERFORMANCE FRICTION CORPORATIONInventors: Donald Burgoon, Wenqi Qian, Scott Andrew Paul, Craig A. Van Harken
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Patent number: 7438161Abstract: A brake caliper has a removable bridge that acts as a rigid mount for a pair of brake pad holders. The removable bridge is retained on the caliper body by spring loaded push button that allows quick removal for replacement of the brake pads, which is especially suited for automotive racing situations. The bridge is snapped in place and rigidly retained on caliper body when in use.Type: GrantFiled: September 16, 2005Date of Patent: October 21, 2008Assignee: Performance Friction CorporationInventors: Donald Burgoon, Darrick Dong, Grafton Robertson, Wenqi Qian
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Publication number: 20080149435Abstract: A wheel bearing hub and disc brake rotor assembly for use on vehicles includes a rotor (14) and a wheel mount (24), formed as a package bearing, fastened to the rotor with a connection assembly that promotes in plane torque transfer. The rotor has a flange form as a series of spaced tabs (20), and the wheel bearing hub (14) has a shoulder with complementary spaced tabs (34). The rotor is connected to the bearing hub by clamping a bridge (42) that spans the shoulder tabs over the rotor tabs. A spring clip (50) can be use with the bridge to accommodate thermal expansion of the rotor and eliminate rattling. Torque is transferred from the brake rotor to the bearing hub in a common plane to prevent twisting. In one embodiment, the bearing hub shoulder tabs may be formed by milling or machining slots. In another embodiment, the bearing hub shoulder tabs may be formed by fine-blanking or stamping slots.Type: ApplicationFiled: April 3, 2006Publication date: June 26, 2008Applicant: PERFORMANCE FRICTION CORPORATIONInventors: Donald Burgoon, Wenqi Qian
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Publication number: 20060213730Abstract: A brake caliper has a removable bridge that acts as a rigid mount for a pair of brake pad holders. The removable bridge is retained on the caliper body by spring loaded push button that allows quick removal for replacement of the brake pads, which is especially suited for automotive racing situations. The bridge is snapped in place and rigidly retained on caliper body when in use.Type: ApplicationFiled: September 16, 2005Publication date: September 28, 2006Inventors: Donald Burgoon, Darrick Dong, Grafton Robertson, Wenqi Qian
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Patent number: 7077247Abstract: A brake assembly for use on vehicles includes a rotor and a wheel mount, formed as a hat portion, fastened to the rotor with a bobbin assembly. The rotor has a flange formed as a series of spaced tabs, and the bobbin assembly is bolted to the hat portion with the rotor flange clamped therebetween. A spring clip can be used with the bobbin to accommodate thermal expansion of the rotor and eliminate rotor rattling. The bobbin has a binocular shape that receives a pair of bolts. A crush zone can be provided between the rotor and the bobbin yields to accommodate machining tolerances of the rotor and promote uniform torque transfer distribution to the hub. Torque is transferred from the brake rotor to the hat portion in a common plane to prevent twisting in the fastener connection.Type: GrantFiled: April 28, 2005Date of Patent: July 18, 2006Assignee: Performance Friction CorporationInventors: Donald L. Burgoon, Wenqi Qian, Jason C. Oakley
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Patent number: 6997292Abstract: A brake assembly for use on vehicles includes a rotor and a wheel mount, formed as a hat portion, fastened to the rotor with a bobbin assembly. The rotor has a flange formed as a series of spaced tabs, and the bobbin assembly is bolted to the hat portion with the rotor flange clamped therebetween. A spring clip can be used with the bobbin to accommodate thermal expansion of the rotor and eliminate rotor rattling. The bobbin has a binocular shape that receives a pair of bolts. A crush zone between the rotor and the bobbin yields to accommodate machining tolerances of the rotor and promote uniform torque transfer distribution to the hub. Torque is transferred from the brake rotor to the hat portion in a common plane to prevent twisting in the fastener connection.Type: GrantFiled: April 2, 2003Date of Patent: February 14, 2006Assignee: Performance Friction CorporationInventors: Donald L. Burgoon, Wenqi Qian, Jason C. Oakley
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Publication number: 20050194224Abstract: A brake assembly for use on vehicles includes a rotor and a wheel mount, formed as a hat portion, fastened to the rotor with a bobbin assembly. The rotor has a flange formed as a series of spaced tabs, and the bobbin assembly is bolted to the hat portion with the rotor flange clamped therebetween. A spring clip can be used with the bobbin to accommodate thermal expansion of the rotor and eliminate rotor rattling. The bobbin has a binocular shape that receives a pair of bolts. A crush zone can be provided between the rotor and the bobbin yields to accommodate machining tolerances of the rotor and promote uniform torque transfer distribution to the hub. Torque is transferred from the brake rotor to the hat portion in a common plane to prevent twisting in the fastener connection.Type: ApplicationFiled: April 28, 2005Publication date: September 8, 2005Inventors: Donald Burgoon, Wenqi Qian, Jason Oakley
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Publication number: 20040140164Abstract: A brake assembly for use on vehicles includes a rotor and a wheel mount, formed as a hat portion, fastened to the rotor with a bobbin assembly. The rotor has a flange formed as a series of spaced tabs, and the bobbin assembly is bolted to the hat portion with the rotor flange clamped therebetween. A spring clip can be used with the bobbin to accommodate thermal expansion of the rotor and eliminate rotor rattling. The bobbin has a binocular shape that receives a pair of bolts. A crush zone between the rotor and the bobbin yields to accommodate machining tolerances of the rotor and promote uniform torque transfer distribution to the hub. Torque is transferred from the brake rotor to the hat portion in a common plane to prevent twisting in the fastener connection.Type: ApplicationFiled: April 2, 2003Publication date: July 22, 2004Applicant: Performance Friction CorporationInventors: Donald L. Burgoon, Wenqi Qian, Jason C. Oakley
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Publication number: 20040094375Abstract: A brake caliper has a piston retained in a bore that abuts a brake pad for moving the brake pad into selective engagement with a rotor to effect braking. The piston has a composite cap that is formed of a cap piece made of strong material, such as steel, and an insulator, made of polyimide resin material, for example. The insulator is preferably in the form of a ring clamped between the cap piece and the piston to create a thermal break and minimize heat transfer from the brake pad to the piston and caliper assembly.Type: ApplicationFiled: January 22, 2003Publication date: May 20, 2004Inventors: Wenqi Qian, Grafton Robertson
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Publication number: 20040084261Abstract: A rotor for use in an automobile braking assembly has a plurality of indentations or dimples formed on the brake pad contact surface of the rotor. The dimples may be arranged in a pattern on the surface. The pattern can be a series of aligned dimples that extend radially in groups around the circumference of the disk. The disk may be ventilated. The dimpled rotor provides enhanced friction, without increased noise, and promotes uniform temperature distribution.Type: ApplicationFiled: January 8, 2003Publication date: May 6, 2004Applicant: Performance Friction CorporationInventors: Donald Burgoon, Wenqi Qian
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Patent number: 6729445Abstract: A brake caliper has a piston retained in a bore that abuts a brake pad for moving the brake pad into selective engagement with a rotor to effect braking. The piston has a composite cap that is formed of a cap piece made of strong material, such as steel, and an insulator, made of polyimide resin material, for example. The insulator is preferably in the form of a ring clamped between the cap piece and the piston to create a thermal break and minimize heat transfer from the brake pad to the piston and caliper assembly.Type: GrantFiled: January 22, 2003Date of Patent: May 4, 2004Assignee: Performance Friction CorporationInventors: Wenqi Qian, Grafton Robertson
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Patent number: 6604613Abstract: A hub rotor assembly includes a hub, a rotor supported by the hub and a plurality of fasteners that connect the rotor to the hub. The hub includes a wheel mounting flange and rotor mounting flange to which a flange of the rotor is attached. The rotor mounting flange has a larger diameter than the wheel mounting flange, or other hub elements outboard of the rotor mounting flange, so that the rotor can be easily removed from the hub. Features of the invention also include floatation elements associated with a fastener to fasten the rotor to the hub while allowing the rotor to move or float relative to the hub. A spring clip may be used with the floatation elements to prevent the rotor from rattling. The assembly is particularly suited for commercial highway vehicles and high performance vehicles.Type: GrantFiled: April 25, 2002Date of Patent: August 12, 2003Assignee: Performance Friction CorporationInventors: Donald L. Burgoon, Wenqi Qian, Sean E. Killeen
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Publication number: 20030034213Abstract: A rotor has an array of grooves formed on the brake pad contact surface. The array is preferably formed as a repeating pattern of regularly spaced grooves. The repeating pattern of grooves creates a plurality of radially and circumferentially offset rings of grooves. The rings can radially overlap. The rotor is preferably ventilated having two brake pad contact surfaces separated by a plurality of vanes. The grooves are preferably arranged on the brake pad contact surfaces between the vanes. The grooves can have various configurations and shapes. The array of grooves increases friction between a brake rotor and brake pads, and decreases the thermal gradient and thermal distortion on the brake pad contact surfaces.Type: ApplicationFiled: July 25, 2002Publication date: February 20, 2003Applicant: Performance Friction CorporationInventors: Wenqi Qian, Donald L. Burgoon, Sean E. Killeen
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Publication number: 20020157908Abstract: A hub rotor assembly includes a hub, a rotor supported by the hub and a plurality of fasteners that connect the rotor to the hub. The hub includes a wheel mounting flange and rotor mounting flange to which a flange of the rotor is attached. The rotor mounting flange has a larger diameter than the wheel mounting flange, or other hub elements outboard of the rotor mounting flange, so that the rotor can be easily removed from the hub. Features of the invention also include floatation elements associated with a fastener to fasten the rotor to the hub while allowing the rotor to move or float relative to the hub. A spring clip may be used with the floatation elements to prevent the rotor from rattling. The assembly is particularly suited for commercial highway vehicles and high performance vehicles.Type: ApplicationFiled: April 25, 2002Publication date: October 31, 2002Inventors: Donald L. Burgoon, Wenqi Qian, Sean E. Killeen
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Patent number: 6446770Abstract: A rotor has an array of grooves formed on the brake pad contact surface. The array is preferably formed as a repeating pattern of regularly spaced grooves. The repeating pattern of grooves creates a plurality of radially and circumferentially offset rings of grooves. The rings can radially overlap. The rotor is preferably ventilated having two brake pad contact surfaces separated by a plurality of vanes. The grooves are preferably arranged on the brake pad contact surfaces between the vanes. The grooves can have various configurations and shapes. The array of grooves increases friction between a brake rotor and brake pads, and decreases the thermal gradient and thermal distortion on the brake pad contact surfaces.Type: GrantFiled: March 30, 2001Date of Patent: September 10, 2002Assignee: Performance Friction CorporationInventors: Wenqi Qian, Donald L. Burgoon, Seen E. Killeen
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Publication number: 20010040077Abstract: A rotor has an array of grooves formed on the brake pad contact surface. The array is preferably formed as a repeating pattern of regularly spaced grooves. The repeating pattern of grooves creates a plurality of radially and circumferentially offset rings of grooves. The rings can radially overlap. The rotor is preferably ventilated having two brake pad contact surfaces separated by a plurality of vanes. The grooves are preferably arranged on the brake pad contact surfaces between the vanes. The grooves can have various configurations and shapes. The array of grooves increases friction between a brake rotor and brake pads, and decreases the thermal gradient and thermal distortion on the brake pad contact surfaces.Type: ApplicationFiled: March 30, 2001Publication date: November 15, 2001Inventors: Wenqi Qian, Donald L. Burgoon, Seen E. Killeen
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Patent number: 6267210Abstract: A hub rotor assembly includes a hub, a rotor supported by the hub and a plurality of fasteners that connect the rotor to the hub and allow relative movement between the rotor and the hub. The hub rotor assembly of the invention focuses on a brake hub and rotor assembly that uses a floatation element associated with a fastener to fasten the rotor to the hub while allowing the rotor to move or float relative to the hub. The rotor thus fastened is permitted to move or float in a limited manner with respect to the hub. This reduces the need for precise balancing due to float self-balancing. Such floatation reduces first and second order thermal distortion by allowing the rotor to thermally expand and also accommodates and significantly reduces the temperature variation and thermal distortion across the rotor surface during braking. The assembly is particularly suited for commercial highway vehicles.Type: GrantFiled: April 26, 2000Date of Patent: July 31, 2001Assignee: Performance Friction CorporationInventors: Donald L. Burgoon, Wenqi Qian, Sean E. Killeen