Patents by Inventor Carl H. Brinkhoff

Carl H. Brinkhoff 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: 4564009
    Abstract: A universal ear plug that fits any size of ear, which may be worn for extended lengths of time without experiencing discomfort, comprising; an integral molded frustum-shaped, semi-rigid, solid body having an axial cavity in the tip end; a flexible flange around the hollow tip which extends outwardly from the tip towards the back; a second, larger, cup-shaped, semi-spherical flange positioned at the other end of the body; an axial mounted extraction and insertion stem attached along the outer rim of the second flange, which provides greater ease of insertion and removal.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: January 14, 1986
    Assignee: Mine Safety Appliances Company
    Inventor: Carl H. Brinkhoff
  • Patent number: 4536892
    Abstract: A riot faceshield assembly is provided which can be utilized with a wide range of protective helmet designs and sizes, which provides a positive sealing relationship between the faceshield and the front brim of the helmet, which may be pivoted into and conveniently locked in the protective position, and which includes a positive stop member to prevent the faceshield from pivoting downwardly into contact with a wearer's neck or chest when impacted. The faceshield assembly includes a three point or triangular retention system which assures integrity of the unit in the event of either upwardly or downwardly directed impacts.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: August 27, 1985
    Assignee: Mine Safety Appliances Company
    Inventors: Carl H. Brinkhoff, Gordon C. Scott
  • Patent number: 4053051
    Abstract: Extending into the open end of a cylindrical container is the stem of an earplug inserter that has an enlarged portion outside of the container forming a shoulder spaced from the open end of the container. Enclosing the stem between it and the encircling side wall of the container is a thin sound-attenuating mat of fibers, the marginal portion of which extends out of the container and flares outwardly across the inserter shoulder. This mat forms an earplug that is removable with the inserter from the container to permit insertion of the earplug in an ear by means of the inserter, which is then withdrawn from the plug. The earplug is made by placing a flat fibrous mat against the open end of the container and then pushing it into the container by means of the inserter stem.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: October 11, 1977
    Assignee: Mine Safety Appliances Company
    Inventor: Carl H. Brinkhoff