Patents by Inventor Lai Hung-Lin

Lai Hung-Lin 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).

  • Structure of a shutoff valve
    Patent number: 5992823
    Abstract: A structurally improved shutoff valve is provided, the shutoff valve comprises a straight or an elbow tubular housing including a water inlet and a water outlet at two ends for respectively connecting a water source and a waterflow pipe therebetween, a valve ball disposed in the housing and operated by a swivel knob for controlling the water flow therethrough, a nipple in cooperation with a retaining ring and a nut to engage the waterflow pipe with the water outlet of the housing. A sealing ring secured to an outer periphery adjacent the forward end of the nipple having a outer diameter slightly larger than that of the outer periphery of the nipple so as to completely prevent the water from leaking out of the valve. Upon this improvement, the engagement of the nipple with the water outlet of the housing will no longer apply the waterproof glue.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: November 30, 1999
    Inventor: Lai Hung-Lin
  • Switch valve
    Patent number: D430272
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: August 29, 2000
    Inventor: Lai Hung-Lin
  • Cut-out valve
    Patent number: D430922
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: September 12, 2000
    Inventor: Lai Hung-Lin