Patents by Inventor Genfa Mao

Genfa Mao 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: 10632816
    Abstract: The present Freon refilling apparatus for vehicles comprises a tube fitting and a refilling duct. The tube fitting is connected to the refilling duct. The lower end of the tube fitting has a connection port to connect with gas cylinders. A pushrod is movably inserted into the tube fitting in its axial direction. Between the tube fitting and the upper end of the pushrod, there is an operating mechanism which can push the pushrod down to the lower end of the tube fitting. When the pushrod moves downwards, its lower end can make the gas cylinder connected to the tube fitting. The present Freon refilling apparatus for vehicles is applicable to different types of gas cylinders storing Freon. This provides a more convenient way to refill Freon for automobile air conditioners, with a lower cost.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: April 28, 2020
    Assignee: Qianjiang Group Wenling Jennfeng Industry Inc.
    Inventors: Zhuo Cai, Weicai Jiang, Genfa Mao
  • Patent number: 10470368
    Abstract: A multi-functional garden implement comprises an underframe connected with a supporting shaft. A pushing handle is fixedly connected to the underframe, and wheels are connected with the supporting shaft. The multi-functional garden implement further comprises a rotating bracket, which is connected to a power source. A working head is connected to the power source. The rotating bracket is rotatably connected to the underframe and capable of driving the working head to swing to both sides back and forth. Between the underframe and the rotating bracket, there is also a locating mechanism which can secure the rotating bracket onto the underframe. The multi-functional garden implement is capable of adjusting the position of the working head, so as to meet various requirements for the working conditions of gardening work.
    Type: Grant
    Filed: May 30, 2016
    Date of Patent: November 12, 2019
    Assignee: Wenling Jennfeng Industry Inc.
    Inventors: Weijun Li, Genfa Mao, Shijun Zhu
  • Patent number: 10117382
    Abstract: A multi-functional garden implement comprises an underframe, and a power motor is secured to the underframe. The multi-functional garden implement also comprises an adapting tube, inside which a transmitting shaft is rotatably connected. One end of the transmitting shaft connects to a working head. A locking sleeve is secured to the underframe, and the end of the adapting tube movably inserts into the locking sleeve. There is a locking piece designed on the locking sleeve, which allows the locking sleeve to clamp the adapting tube and secure the adapting tube onto the locking sleeve. The present multi-functional garden implement can replace the working head quickly, so that it has functions of cutting, micro tilling, etc.
    Type: Grant
    Filed: May 30, 2016
    Date of Patent: November 6, 2018
    Assignee: Wenling Jennfeng Industry Inc.
    Inventors: Weijun Li, Genfa Mao, Shijun Zhu
  • Publication number: 20170225539
    Abstract: The present Freon refilling apparatus for vehicles comprises a tube fitting and a refilling duct. The tube fitting is connected to the refilling duct. The lower end of the tube fitting has a connection port to connect with gas cylinders. A pushrod is movably inserted into the tube fitting in its axial direction. Between the tube fitting and the upper end of the pushrod, there is an operating mechanism which can push the pushrod down to the lower end of the tube fitting. When the pushrod moves downwards, its lower end can make the gas cylinder connected to the tube fitting. The present Freon refilling apparatus for vehicles is applicable to different types of gas cylinders storing Freon. This provides a more convenient way to refill Freon for automobile air conditioners, with a lower cost.
    Type: Application
    Filed: May 27, 2016
    Publication date: August 10, 2017
    Applicant: Wenling Jennfeng Industry Inc.
    Inventors: Zhuo Cai, Weicai Jiang, Genfa Mao
  • Publication number: 20170223893
    Abstract: A multi-functional garden implement comprises an underframe connected with a supporting shaft. A pushing handle is fixedly connected to the underframe, and wheels are connected with the supporting shaft. The multi-functional garden implement further comprises a rotating bracket, which is connected to a power source. A working head is connected to the power source. The rotating bracket is rotatably connected to the underframe and capable of driving the working head to swing to both sides back and forth. Between the underframe and the rotating bracket, there is also a locating mechanism which can secure the rotating bracket onto the underframe. The present multi-functional garden implement is capable of adjusting the position of the working head, so as to meet various requirements for the working conditions of gardening work.
    Type: Application
    Filed: May 30, 2016
    Publication date: August 10, 2017
    Applicant: Wenling Jennfeng Industry Inc.
    Inventors: Weijun Li, Genfa Mao, Shijun Zhu
  • Publication number: 20170227269
    Abstract: A Freon refilling apparatus for vehicles comprises an outer shell and a tube fitting. The tube fitting is secured to a refilling duct, and one end of the tube fitting has a connection port. The apparatus also comprises an operating handle and a pushrod. One end of the operating handle is hinged to the tube fitting, and the other end is a press part. When the press part swings and gets close to the tube fitting, it drives the pushrod to move and open the gas cylinder. A confining plate is also hinged to the press part. The confining plate has an active contact part, while the outer shell has a passive contact part. The active contact part can lean against the passive contact part. The operating handle is locked when that happens.
    Type: Application
    Filed: April 28, 2016
    Publication date: August 10, 2017
    Applicant: Wenling Jennfeng Industry Inc.
    Inventors: Zhuo Cai, Weicai Jiang, Genfa Mao
  • Publication number: 20170223894
    Abstract: A multi-functional garden implement comprises an underframe, and a power motor is secured to the underframe. The multi-functional garden implement also comprises an adapting tube, inside which a transmitting shaft is rotatably connected. One end of the transmitting shaft connects to a working head. A locking sleeve is secured to the underframe, and the end of the adapting tube movably inserts into the locking sleeve. There is a locking piece designed on the locking sleeve, which allows the locking sleeve to clamp the adapting tube and secure the adapting tube onto the locking sleeve. The present multi-functional garden implement can replace the working head quickly, so that it has functions of cutting, micro tilling, etc.
    Type: Application
    Filed: May 30, 2016
    Publication date: August 10, 2017
    Applicant: Wenling Jennfeng Industry Inc.
    Inventors: Weijun Li, Genfa Mao, Shijun Zhu