Patents by Inventor Hidekazu Enomoto

Hidekazu Enomoto 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).

  • Molding device for forming a socket end on a plastic pipe
    Patent number: 4412802
    Abstract: For the purpose of making a joint socket comprising at least two portions, namely a portion for receiving a plastic pipe end and another portion into which a rubber ring is fitted, a device for heating and softening a plastic pipe end and enlarging the radius of the softened pipe end to twice its size which includes, an inwardly slanted portion between a first outwardly slanted portion and a second outwardly slanted portion whose radius becomes smaller as it comes nearer to the front end thereof. As the result, the frictional resistance between an improved core and the radius enlarged softened pipe is reduced to a value which enables the device to be operated such that wall-thickened sockets can be made without loss of wall thickness subsequent to the radius enlarging process.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: November 1, 1983
    Assignee: Kubota Ltd.
    Inventors: Ryozo Ohta, Tadao Yoshizawa, Masayuki Sakaguchi, Yoshiaki Hara, Junsuke Kyomen, Ryuichi Yoneda, Hidekazu Enomoto
  • Method of forming a socket end on a plastic pipe and a molding device for use of the method
    Patent number: 4279853
    Abstract: For the purpose of making a joint socket comprising at least two portions, namely a portion for receiving a plastic pipe end and another portion into which a rubber ring is fitted, a method of heating and softening a plastic pipe end and enlarging the radius of the softened pipe end to twice its size which includes, an inwardly slanted portion between a first outwardly slanted portion and a second outwardly slanted portion whose radius becomes smaller as it comes nearer to the front end thereof. As the result, the frictional resistance between an improved core and the radius enlarged softened pipe is reduced to a value which enables the method to be carried out such that wall-thickened sockets can be made without loss of wall thickness subsequent to the radius enlarging process.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: July 21, 1981
    Assignee: Kubota Ltd.
    Inventors: Ryozo Ohta, Tadao Yoshizawa, Masayuki Sakaguchi, Yoshiaki Hara, Junsuke Kyomen, Ryuichi Yoneda, Hidekazu Enomoto