Patents by Inventor Richard T. Meder

Richard T. Meder 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).

  • Double cylinder pin tumbler lock
    Patent number: 3990281
    Abstract: A pin tumbler lock in which a master cylinder is rotatably mounted within a housing and is drivable by a non-concentrically located drive cylinder also rotatably mounted within the housing. Bolt means are actuable by rotation of the master cylinder. A plurality of pin tumblers are positioned within respective pin bores and normally prevent rotation of both cylinders but are shiftable by key means into alternate positions whereby rotation of the master cylinder by the drive cylinder is permitted to thereby unlock the lock through actuation of the bolt means by the master cylinder.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: November 9, 1976
    Inventor: Richard T. Meder