Patents by Inventor Lawrence E. Fenn

Lawrence E. Fenn 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).

  • Patent number: 4914816
    Abstract: An electric shaver having a handle, and a shaver head having a cutting blade, which is movably carried on the handle. A battery and electric motor are mounted in the handle. A drive member on the motor provides reciprocating movement to a pivotally mounted weight member in the shaver head. The arrangement is such that the weight member reciprocates back and forth at a high rate of speed and inparts reciprocatory, simple harmonic motion to the cutting blade carried by the shaver head. The cutting action is characterized by minimal movement in any direction except essentially linearly, substantially parallel to the blade. Improved shearing action of the hairs is realized, together with minimum tendency for pulling or tearing of the skin. Undesirable irritation, and the development of "nicks" are thereby significantly reduced.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: April 10, 1990
    Inventors: Lawrence E. Fenn, Leo Chateauneuf
  • Patent number: 4819330
    Abstract: An electric shaver having a handle, and a shaver head having a cutting blade, which is movably carried on the handle. A battery and electric motor are mounted in the handle. A drive member on the motor provides reciprocating movement to a pivotally mounted weight member in the shaver head. The arrangement is such that the weight member reciprocates back and forth at a high rate of speed and imparts reciprocatory, simple harmonic motion to the cutting blade carried by the shaver head. The cutting action is characterized by minimal movement in any direction except essentially linearly, substantially parallel to the blade. Improved shearing action of the hairs is realized, together with minimum tendency for pulling or tearing of the skin. Undesirable irritation, and the development of "nicks" are thereby significantly reduced.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: April 11, 1989
    Inventors: Lawrence E. Fenn, Leo Chateauneuf
  • Patent number: 4236061
    Abstract: A quick-acting electric cigar lighter employing a bimetallic disk constituting an electric switching member. The disk is secured in place by a mounting stud, utilizing a welding procedure. The welding does not adversely effect the functioning of the switch due to the provision of a central offset portion in the disk, which tends to relieve stresses on the weld, preventing any failure at that location. The lighter is activated by pushing the igniting unit inward to bring the heating element cup into physical contact with the bimetallic disk. Over-stressing of the bimetallic disk is prevented by mounting the same in a recessed insulating block which has lands that are engaged by the cup after a pre-determined amount of actuation of the plug has occurred. An effective, long-life contact between the cup and the disk is had by the use of special metals which co-act to minimize pitting, deterioration, etc., one metal comprising aluminum which cooperates with other metals such as copper or silver.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: November 25, 1980
    Inventors: Lawrence E. Fenn, Charles R. Sperry
  • Patent number: RE31452
    Abstract: A quick-acting electric cigar lighter employing a bimetallic disk constituting an electric switching member. The disk is secured in place by a mounting stud, utilizing a welding procedure. The welding does not adversely affect the functioning of the switch due to the provision of a central offset portion in the disk, which tends to relieve stresses on the weld, preventing any failure at that location. The lighter is activated by pushing the igniting unit inward to bring the heating element cup into physical contact with the bimetallic disk. Over-stressing of the bimetallic disk is prevented by mounting the same in a recessed insulating block which has lands that are engaged by the cup after a pre-determined amount of actuation of the plug has occurred. An effective, long-life contact between the cup and the disk is had by the use of special metals which co-act to minimize pitting, deterioration, etc., one metal comprising aluminum which cooperates with other metals such as copper or silver. .Iadd.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: November 29, 1983
    Assignee: Casco Products Division of Sun Chemical Corporation
    Inventors: Lawrence E. Fenn, Charles R. Sperry