Patents by Inventor Yoshisada Furukawa

Yoshisada Furukawa 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).

  • Automatic regeneration valve for water softener
    Patent number: 6596159
    Abstract: A regeneration valve 131 is adapted for automatic activation of ion exchange resin in a water softener. The regeneration valve includes a switching valve 1, a control valve 32, a water injection valve 54, a cam mechanism (FIG. 13) and a timer mechanism which are compactly integrated in a single valve assembly. The timer mechanism includes a timer motor 80 provided with a switching gear adapted to be switched between 50 Hz and 60 Hz (FIGS. 16, 17). The ion exchange resin layer within the resin reservoir 2 can be uniformly activated so that the regeneration process can be achieved at a high efficiency.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: July 22, 2003
    Assignee: Maruyama Mfg. Co., Ltd.
    Inventors: Shigeru Maruyama, Yoshisada Furukawa