Patents Assigned to G. Pruefer Mfg. Co.
  • Patent number: 4821543
    Abstract: The present invention provides a double ended key ring that includes a pair of key holders for retaining a set of keys. The key holders are movably connected to a central housing and are biased to retract into a pair of seats located at the ends of the housing to prevent the removal of the keys from the key holders. When the key holders are pulled away from the housing, the keys may then be removed from the key holders.The biasing mechanism for the key holders is located entirely within the housing. To this end the housing includes a central passageway that has a narrow bore, at one end, to preferably slidably receive a spring loaded lock pin that projects through the bore and is connected to one of the key holders. In order to permit the spring loaded lock pin and key holder to be assembled, the other end of the bore remains open until closed by a bushing. The bushing includes a tubular sidewall and an endwall having another narrow bore.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: April 18, 1989
    Assignee: G. Pruefer Mfg. Co.
    Inventor: Robert Scungio
  • Patent number: D307213
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: April 17, 1990
    Assignee: G. Pruefer Mfg. Co.
    Inventor: Robert Scungio