Systems and methods for reducing cutting blade noise

    公开(公告)号:US10117380B1

    公开(公告)日:2018-11-06

    申请号:US15156016

    申请日:2016-05-16

    摘要: A cutting blade for use in a lawnmower or other cutting device has a contoured leading edge profile that forms a series of protrusions and contoured notches. Each contoured notch has a surface that is smooth and contoured such that air is funneled through the contoured notch by the adjacent protrusions, thereby causing the air to form vortices at the surface of the blade. The formation of the vortices helps the airflow to adhere to the blade surface rather than separate from it, thereby creating a more laminar streamlined flow that merges with air flowing over the opposite side of the blade at the trailing edge. By preventing the airflow from separating from the blade surface over a substantial portion of the blade, turbulence is significantly reduced. Thus, noise generated by the blade is significantly reduced as well. In addition, the blade experiences less drag, and the performance of the blade and lawnmower is generally increased.

    METHOD FOR DETECTING FLUID INJECTION IN A PATIENT
    7.
    发明申请
    METHOD FOR DETECTING FLUID INJECTION IN A PATIENT 审中-公开
    检测患者流体注射的方法

    公开(公告)号:US20140213898A1

    公开(公告)日:2014-07-31

    申请号:US14238171

    申请日:2012-02-02

    申请人: Wayne Thompson

    发明人: Wayne Thompson

    IPC分类号: A61M5/00

    摘要: A method for detecting fluid injection in a patient, the method including the steps of providing a fluid storage tank; providing fluid for use in machinery and adding said fluid to the fluid storage tank; and providing a fluorescent dye and adding the fluorescent dye to the fluid such that the fluid fluoresces in the presence of ultraviolet light.

    摘要翻译: 一种用于检测患者中的流体注射的方法,所述方法包括以下步骤:提供流体储存罐; 提供用于机械的流体并将所述流体添加到流体储存罐中; 并提供荧光染料并将荧光染料加入到流体中,使得流体在紫外光的存在下发荧光。