Patents by Inventor Siu Chun Tam
Siu Chun Tam 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: 10072669Abstract: A centrifugal impeller for a blower has a base plate, a cover plate, and a plurality of curved blades mounted between the base plate and the cover plate. The base plate and the cover plate have blade mounting portions including a plurality of mounting holes. Cover plate mounting portions and base plate mounting portions project from each blade and engage with the mounting holes of the cover plate and base plate, respectively. The mounting holes of the cover plate include first mounting holes arranged outwardly from a central region. The first mounting holes have a circular shape. The cover plate mounting portions of each blade include first mounting protrusions engaged with the first mounting holes.Type: GrantFiled: January 23, 2015Date of Patent: September 11, 2018Assignee: Johnson Electric S.A.Inventors: Jun Feng Shen, Ching Hang Leung, Siu Chun Tam
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Patent number: 10041502Abstract: An air blower includes an impeller, a motor and a blower housing. The blower housing includes a first housing member for receiving the motor and a second housing member for receiving the impeller. The first and second housing members are mounted to each other. Two opposed air outlets are formed at an end of the first housing member remote from the second housing member. Each air outlet is formed by an outwardly inclined cutout. The cutout is bounded by two inclined sides. An angle A formed by each inclined side and an axial direction of the blower is in the range from 0 to 45 degrees. Radial lines extending from one inclined side of one air outlet and the adjacent inclined side of the other air outlet form an angle B in the range from 15 to 45 degrees.Type: GrantFiled: April 29, 2015Date of Patent: August 7, 2018Assignee: JOHNSON ELECTRIC S.A.Inventors: Xiao Hong Ye, Jing Li, Nan Li, Ching Hang Leung, Jian Jun Liu, Siu Chun Tam
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Patent number: 10001144Abstract: A blower has a centrifugal impeller driven by an electric motor. The centrifugal impeller has a base plate, a cover plate defining an air inlet, a plurality of blades mounted between the base plate and the cover plate, and a reinforcement ring mounted to the cover plate around the air inlet. The cover plate includes an outwardly extending flange at the air inlet. The reinforcement ring has a flange fitted around the flange of the cover plate. Each blade has cover plate mounting portions and base plate mounting portions. The cover plate has blade mounting holes engaged with the cover plate mounting portions. The base plate has blade mounting holes engaged with the base plate mounting portions. The reinforcement ring increases the strength of the cover plate, to avoid breakage under high speed rotation.Type: GrantFiled: January 23, 2015Date of Patent: June 19, 2018Assignee: JOHNSON ELECTRIC S.A.Inventors: Jun Feng Shen, Ching Hang Leung, Siu Chun Tam
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Publication number: 20150308447Abstract: An air blower includes an impeller, a motor and a blower housing. The blower housing includes a first housing member for receiving the motor and a second housing member for receiving the impeller. The first and second housing members are mounted to each other. Two opposed air outlets are formed at an end of the first housing member remote from the second housing member. Each air outlet is formed by an outwardly inclined cutout. The cutout is bounded by two inclined sides. An angle A formed by each inclined side and an axial direction of the blower is in the range from 0 to 45 degrees. Radial lines extending from one inclined side of one air outlet and the adjacent inclined side of the other air outlet form an angle B in the range from 15 to 45 degrees.Type: ApplicationFiled: April 29, 2015Publication date: October 29, 2015Inventors: Xiao Hong YE, Jing LI, Nan LI, Ching Hang LEUNG, Jian Jun LIU, Siu Chun TAM
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Publication number: 20150204344Abstract: A centrifugal impeller for a blower has a base plate, a cover plate, and a plurality of curved blades mounted between the base plate and the cover plate. The base plate and the cover plate have blade mounting portions including a plurality of mounting holes. Cover plate mounting portions and base plate mounting portions project from each blade and engage with the mounting holes of the cover plate and base plate, respectively. The mounting holes of the cover plate include first mounting holes arranged outwardly from a central region. The first mounting holes have a circular shape. The cover plate mounting portions of each blade include first mounting protrusions engaged with the first mounting holes.Type: ApplicationFiled: January 23, 2015Publication date: July 23, 2015Inventors: Jun Feng SHEN, Ching Hang LEUNG, Siu Chun TAM
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Publication number: 20150204352Abstract: A blower has a centrifugal impeller driven by an electric motor. The centrifugal impeller has a base plate, a cover plate defining an air inlet, a plurality of blades mounted between the base plate and the cover plate, and a reinforcement ring mounted to the cover plate around the air inlet. The cover plate includes an outwardly extending flange at the air inlet. The reinforcement ring has a flange fitted around the flange of the cover plate. Each blade has cover plate mounting portions and base plate mounting portions. The cover plate has blade mounting holes engaged with the cover plate mounting portions. The base plate has blade mounting holes engaged with the base plate mounting portions. The reinforcement ring increases the strength of the cover plate, to avoid breakage under high speed rotation.Type: ApplicationFiled: January 23, 2015Publication date: July 23, 2015Inventors: Jun Feng SHEN, Ching Hang LEUNG, Siu Chun TAM
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Patent number: 7973447Abstract: An electric motor 10 has a stator 14; a wound rotor 20, including a commutator 28; and brush gear for connecting the commutator to a source of electrical power. The brush gear has at least two cage brush assemblies 34. Each cage brush assembly 34 having a brush 40 for making sliding electrical contact with the commutator of the motor; a cage 50 for guiding the brush 40 along a path towards the commutator; and a spring 70 for resiliently urging the brush 40 along the path through the cage 50. The spring 70 is a constant force spring having two coiled end portions which engage the cage 50 at a commutator end portion. The cage 50 has two fingers about which the coiled end portions of the spring 70 locate.Type: GrantFiled: February 3, 2009Date of Patent: July 5, 2011Assignee: Johnson Electric S.A.Inventors: Robin Warner, Siu Chun Tam
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Publication number: 20090212656Abstract: An electric motor 10 has a stator 14; a wound rotor 20, including a commutator 28; and brush gear for connecting the commutator to a source of electrical power. The brush gear has at least two cage brush assemblies 34. Each cage brush assembly 34 having a brush 40 for making sliding electrical contact with the commutator of the motor; a cage 50 for guiding the brush 40 along a path towards the commutator; and a spring 70 for resiliently urging the brush 40 along the path through the cage 50. The spring 70 is a constant force spring having two coiled end portions which engage the cage 50 at a commutator end portion. The cage 50 has two fingers about which the coiled end portions of the spring 70 locate.Type: ApplicationFiled: February 3, 2009Publication date: August 27, 2009Applicant: Johnson Electric S.A.Inventors: Robin Warner, Siu Chun Tam
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Publication number: 20080092932Abstract: A portable domestic steam cleaner has a housing accommodating a releasable water tank. A pump transfers water from the tank to a boiler for generating steam. In use, steam exits a nozzle for cleaning etc. A pump suitable for use in the steamer is also disclosed.Type: ApplicationFiled: October 18, 2007Publication date: April 24, 2008Inventor: Siu Chun Tam
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Publication number: 20080095645Abstract: A pump suitable for use in a portable domestic is also disclosed. The steam cleaner has a housing accommodating a releasable water tank. The pump transfers water from the tank to a boiler for generating steam. In use, steam exits a nozzle for cleaning etc.Type: ApplicationFiled: October 18, 2007Publication date: April 24, 2008Inventor: Siu Chun Tam
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Patent number: 7223070Abstract: A blower motor for a vacuum cleaner or the like has an impeller/rotor assembly which is dynamically balanced. Air guide vanes are disposed between the diffuser plate and fan cover and surround the impeller periphery. A fan cover 13 accommodates the impeller 12. A vane plate 14 is fitted to the fan cover 13 for easy assembly and has guide vanes 28 which locate about the impeller 12 for guiding the working air from the impeller to a diffuser plate.Type: GrantFiled: December 3, 2004Date of Patent: May 29, 2007Assignee: Johnson Electric S.A.Inventors: Siu Chun Tam, Gary M. Marcy
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Patent number: 6851928Abstract: A diffuser plate 22 for a bypass blower motor assembly has a number of vanes 34 for guiding air flow from an impeller to outlet openings in an impeller housing. Each vane has two curved air guiding blades 36, 37. One blade 36 guides the air axially and circumferentially from the impeller towards the outlet openings and the other blade 37 guides the air radially through the outlet openings.Type: GrantFiled: January 31, 2003Date of Patent: February 8, 2005Assignee: Johnson Electric S.A.Inventors: Siu Chun Tam, Kwong Yip Poon
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Patent number: 6831383Abstract: An oil seal arrangement for an electric motor, especially a bypass blower motor assembly has an oil seal protecting a shaft bearing 16 and sealing the shaft aperture between a motor part and a blower part. The oil seal 19 has two lips 25, 28 contacting the shaft 15 at two spaced locations forming a grease chamber 26 therebetween. The volume of the grease chamber 26 is enlarged by a groove 27 in the shaft 15 between the lips 25, 28 of the oil seal 19.Type: GrantFiled: January 31, 2003Date of Patent: December 14, 2004Assignee: Johnson Electric S.A.Inventors: Kwong Yip Poon, Siu Chun Tam
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Patent number: 6808365Abstract: A bypass blower motor assembly having a motor section 10 and a blower section 11 separated by an end bracket 20 which has through openings. The openings are sealed by a diffuser plate 22 using a labyrinth seal and two O-rings 41, 42.Type: GrantFiled: January 31, 2003Date of Patent: October 26, 2004Assignee: Johnson Electric S.A.Inventors: Kwong Yip Poon, Siu Chun Tam
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Patent number: 6608423Abstract: A universal motor has a brush holder assembly which is fixed to a support bracket using a single fastener. The brush holder assembly uses a terminal cap to secure the brush and brush spring within the brush holder. The terminal cap is fixed to the brush holder and compresses the brush spring by movement of the terminal cap in a single direction.Type: GrantFiled: February 12, 2001Date of Patent: August 19, 2003Assignee: Johnson Electric, S.A.Inventor: Siu Chun Tam
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Publication number: 20030151320Abstract: An oil seal arrangement for an electric motor, especially a bypass blower motor assembly has an oil seal protecting a shaft bearing 16 and sealing the shaft aperture between a motor part and a blower part. The oil seal 19 has two lips 25, 28 contacting the shaft 15 at two spaced locations forming a grease chamber 26 therebetween. The volume of the grease chamber 26 is enlarged by a groove 27 in the shaft 15 between the lips 25, 28 of the oil seal 19.Type: ApplicationFiled: January 31, 2003Publication date: August 14, 2003Inventors: Kwong Yip Poon, Siu Chun Tam
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Publication number: 20030147747Abstract: A diffuser plate 22 for a bypass blower motor assembly has a number of vanes 34 for guiding air flow from an impeller to outlet openings in an impeller housing. Each vane has two curved air guiding blades 36, 37. One blade 36 guides the air axially and circumferentially from the impeller towards the outlet openings and the other blade 37 guides the air radially through the outlet openings.Type: ApplicationFiled: January 31, 2003Publication date: August 7, 2003Inventors: Siu Chun Tam, Kwong Yip Poon
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Publication number: 20030147746Abstract: A bypass blower motor assembly having a motor section 10 and a blower section 11 separated by an end bracket 20 which has through openings. The openings are sealed by a diffuser plate 22 using a labyrinth seal and two O-rings 41, 42.Type: ApplicationFiled: January 31, 2003Publication date: August 7, 2003Inventors: Kwong Yip Poon, Siu Chun Tam
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Publication number: 20010013738Abstract: A universal motor 10 has a brush holder assembly 12 which is fixed to a support bracket 14 using a single fastener 42. The brush holder assembly uses a terminal cap 20 to secure the brush 22 and brush spring 24 within the brush holder 18. The terminal cap is fixed to the brush holder and compresses the brush spring by movement of the terminal cap in a single direction.Type: ApplicationFiled: February 12, 2001Publication date: August 16, 2001Inventor: Siu Chun Tam