Patents by Inventor Shengxian LI

Shengxian LI 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).

  • Drug dosing device and method for dosage metering and control
    Patent number: 10203702
    Abstract: A drug dosing device and method for dosage metering and control, the drug dosing device including a drug dosing canister, a first flow channel, a second flow channel, a third flow channel, a metering flow channel, a switch valve, a control valve and a pressure release port; the upper part or top of the drug dosing canister communicates with the upper part or top of the metering flow channel via the first flow channel; the lower part or bottom of the drug dosing canister communicates with the lower part or bottom of the metering flow channel via the second flow channel; the switch valve disposed on the second flow channel; the bottom or lower part of the metering flow channel communicates with the control valve via the third flow channel; the pressure release port is disposed at the upper part or top of the drug dosing canister; and the cross section area of the metering flow channel is less than the cross section area of the drug dosing canister.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: February 12, 2019
    Assignee: BEIJING UNITY BENEFICIAL TECHNOLOGY CO., LTD
    Inventor: Shengxian Li
  • DRUG DOSING DEVICE AND METHOD FOR DOSAGE METERING AND CONTROL
    Publication number: 20160327960
    Abstract: A drug dosing device and method for dosage metering and control, the drug dosing device including a drug dosing canister, a first flow channel, a second flow channel, a third flow channel, a metering flow channel, a switch valve, a control valve and a pressure release port; the upper part or top of the drug dosing canister communicates with the upper part or top of the metering flow channel via the first flow channel; the lower part or bottom of the drug dosing canister communicates with the lower part or bottom of the metering flow channel via the second flow channel; the switch valve disposed on the second flow channel; the bottom or lower part of the metering flow channel communicates with the control valve via the third flow channel; the pressure release port is disposed at the upper part or top of the drug dosing canister; and the cross section area of the metering flow channel is less than the cross section area of the drug dosing canister.
    Type: Application
    Filed: December 5, 2014
    Publication date: November 10, 2016
    Applicant: BEIJING HAOBO WANWEI TECHNOLOGY CO., LTD
    Inventor: Shengxian LI