Patents by Inventor Wallace D. Herrick

Wallace D. Herrick 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).

  • Dry shaver with floating peripherally supported shear plate
    Patent number: 4077120
    Abstract: A dry rotary shaver having a floating shear plate which is supported beneath its periphery by resilient spring means. The spring support is fixed within the shaver head, prevents shear plate rotation, and acts as a means to retain the shear plate and rotary cutting element in place when the shaver head is removed from the shaver housing. Furthermore, the spring support may incorporate stop means to prevent hang up of the shear plate on the shaver opening in the event the shear plate is forceably pressed inwardly, as by a finger.
    Type: Grant
    Filed: July 14, 1972
    Date of Patent: March 7, 1978
    Assignee: Bissell, Inc.
    Inventors: Wallace D. Herrick, Robert A. Yonkers
  • Rotary shaver with shear plate rotation preventing means
    Patent number: 4001932
    Abstract: A dry rotary shaver has a floating shear plate disposed within a head opening which provides an outer stop, and a rigid stop member which limits inward shear plate movement. The stop member is provided with one or more outwardly extending rigid posts of fixed length which are received within complimentary notches in the wall of the shear plate.
    Type: Grant
    Filed: November 17, 1972
    Date of Patent: January 11, 1977
    Assignee: Bissell Inc.
    Inventor: Wallace D. Herrick