Patents by Inventor Fredrick B. Dreyer

Fredrick B. Dreyer 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).

  • Wallboard cutter
    Patent number: 4801101
    Abstract: A shredder having a stationary comb cutter and primary and secondary cutters on the rotor providing "punch and die" shearing action suitable for shredding wallboard or the like. Means for metering the incoming feed through a pair of nip rollers, the upper set of which is spaced inboard such that they do not press on the side edges of the wallboard as it passes through the nip.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: January 31, 1989
    Assignee: Gruendler Crusher and Pulverizer, Co.
    Inventors: Fredrick B. Dreyer, Daniel T. Maloney
  • Hammerpin puller
    Patent number: 4017957
    Abstract: A means for pulling a hammerpin including a reciprocating gripping means associated with the hammermill frame, said means initially gripping a hammerpin extension and thereafter gripping and supporting said hammerpin during the pulling thereof.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: April 19, 1977
    Assignee: Gruendler Crusher & Pulverizer Co.
    Inventor: Fredrick B. Dreyer