Patents by Inventor Chun Chee Loh

Chun Chee Loh 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: 9821446
    Abstract: In a handheld power tool having a drive motor operable via a manual switch for driving a drive body which is associated with a mechanical percussion mechanism and coupled to a percussion member for driving an output shaft provided with a tool receptacle, and an operating mode switchover element which is designed to switch over between a normal operation and a percussion operation of the percussion mechanism and which is coupled to the drive body being associated with the drive body, an operating device is provided for operating the operating mode switchover element which is coupled to the manual switch and which is designed to enable a switchover of the operating mode switchover element between normal operation and the percussion operation of the percussion mechanism by operating the manual switch.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: November 21, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Jack Chai, Chuan Cheong Yew, Chun Chee Loh, Sim Teik Yeoh
  • Patent number: 9718173
    Abstract: In a handheld machine tool having a tool holding fixture, which has a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle being configured for the connection to a first tool insert, which is able to be locked in the multi-faced inner receptacle using a locking device assigned to the tool holding fixture, and the multi-faced outer receptacle being configured for the connection to a second tool insert, which has an inner multi-faced coupling that is able to be slid onto the multi-faced outer receptacle. The locking device has an actuating element, which is rotatable about a longitudinal axis of the tool holding fixture for unlocking the first tool insert from a specified locking position into a specified unlocking position.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: August 1, 2017
    Assignee: Robert Bosch GMBH
    Inventors: Chun How Low, Chun Chee Loh, Mohsein Wan, Siew Yuen Lee
  • Publication number: 20130199814
    Abstract: In the case of a handheld machine tool having a mechanical striking mechanism, which includes a striking body provided with at least one actuating cam and an output shaft provided with at least one output cam, the actuating cam being configured for percussively driving the output cam during percussive operation of the mechanical striking mechanism, a damping element, which has an abutment element acted upon by a spring element, is provided at least on one actuating cam and/or on one output cam.
    Type: Application
    Filed: June 27, 2011
    Publication date: August 8, 2013
    Inventors: Chuan Cheong Yew, Chun How Low, Chun Chee Loh, Chi Hoe Leong, Mohsein Wan, Siew Yuen Lee
  • Publication number: 20130154202
    Abstract: In a handheld machine tool having a tool holding fixture, which has a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle being configured for the connection to a first tool insert, which is able to be locked in the multi-faced inner receptacle using a locking device assigned to the tool holding fixture, and the multi-faced outer receptacle being configured for the connection to a second tool insert, which has an inner multi-faced coupling that is able to be slid onto the multi-faced outer receptacle. The locking device has an actuating element, which is rotatable about a longitudinal axis of the tool holding fixture for unlocking the first tool insert from a specified locking position into a specified unlocking position.
    Type: Application
    Filed: May 18, 2011
    Publication date: June 20, 2013
    Applicant: Robert Bosch GMBH
    Inventors: Chun How Low, Chun Chee Loh, Mohsein Wan, Siew Yuen Lee
  • Publication number: 20130112446
    Abstract: In a handheld power tool having a drive motor operable via a manual switch for driving a drive body which is associated with a mechanical percussion mechanism and coupled to a percussion member for driving an output shaft provided with a tool receptacle, and an operating mode switchover element which is designed to switch over between a normal operation and a percussion operation of the percussion mechanism and which is coupled to the drive body being associated with the drive body, an operating device is provided for operating the operating mode switchover element which is coupled to the manual switch and which is designed to enable a switchover of the operating mode switchover element between normal operation and the percussion operation of the percussion mechanism by operating the manual switch.
    Type: Application
    Filed: November 5, 2012
    Publication date: May 9, 2013
    Applicant: Robert Bosch GmbH
    Inventors: Jack See Seng Chai, Chuan Cheong Yew, Chun Chee Loh, Sim Teik Yeoh
  • Patent number: 8418779
    Abstract: A rotary power tool having a tool housing, an internal housing within the tool housing, and a switch assembly that is substantially within the tool housing. According to the invention, the switch assembly is supported by the internal housing and is movable between at least two positions for selecting between at least two tool operational modes. The internal housing is embodied by at least one blocking element that extends towards the tool housing and limits the overall range of motion of the switch assembly.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: April 16, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Chi Hoe Leong, Siew Yuen Lee, Chun Chee Loh
  • Publication number: 20110233878
    Abstract: In a hand-held power tool having a tool holder equipped with a multisided internal socket for connecting to a first insert bit and with a multisided external socket for connecting to a second insert bit, the tool holder being associated with a locking device for locking the first insert bit in the multisided internal socket, the locking device has an actuating element that it is possible to slide from a locking position into an unlocking position in an axial direction oriented away from the first insert tool in order to unlock the first insert tool.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 29, 2011
    Inventors: Mohsein Wan, Chun How Low, Siew Yuen Lee, Chun Chee Loh
  • Publication number: 20110048750
    Abstract: A rotary power tool having a tool housing, an internal housing within the tool housing, and a switch assembly that is substantially within the tool housing. According to the invention, the switch assembly is supported by the internal housing and is movable between at least two positions for selecting between at least two tool operational modes. The internal housing is embodied by at least one blocking element that extends towards the tool housing and limits the overall range of motion of the switch assembly.
    Type: Application
    Filed: August 13, 2010
    Publication date: March 3, 2011
    Inventors: Chi Hoe LEONG, Siew Yuen Lee, Chun Chee Loh