Patents by Inventor Larry Brunn

Larry Brunn 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).

  • Publication number: 20100077916
    Abstract: A cushioned hydraulic cylinder assembly including a hydraulic cylinder having a reciprocating piston movable between an extended position and a retracted position and a hydraulic fluid port proximate an end thereof for ingress and egress of hydraulic fluid. A cushion member is carried by the piston, wherein the cushion member obstructs hydraulic fluid flow out of the port in the retracted position and is spaced from the port in the extended position. A continuous spiral groove is formed in an outer surface of the cushion member and has a beginning at a first end of the cushion member away from the piston and terminates proximate a second end adjacent the piston. The beginning of the spiral groove has a cross-sectional volume, the cross-sectional volume decreasing toward the second end of the cushion member. The spiral groove gradually reduces hydraulic fluid flow out of the port as the piston moves toward the retracted position.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Inventor: LARRY BRUNN
  • Patent number: 7347657
    Abstract: Refuse collection apparatus including a collection container grasping mechanism and a lifting and dumping mechanism. The grasping mechanism includes a pair of grasping arms mounted for movement between an at-rest position and a grasping position, springs attached to the grasping arms so as to bias the grasping arms into the at-rest position, and a first hydraulic cylinder attached to an activating element for moving the grasping arms from the at-rest position into the grasping position. The lifting and dumping mechanism is coupled to the grasping mechanism for moving the grasping mechanism from a refuse container grasping position to a dumping position. The lifting and dumping mechanism includes elongated linking arms and a driving hydraulic cylinder coupled in a four point movement for simultaneously lifting and rotating the grasping mechanism from the refuse container grasping position into the dumping position.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: March 25, 2008
    Inventor: Larry Brunn
  • Publication number: 20060104764
    Abstract: Refuse collection apparatus including a collection container grasping mechanism and a lifting and dumping mechanism. The grasping mechanism includes a pair of grasping arms mounted for movement between an at-rest position and a grasping position, springs attached to the grasping arms so as to bias the grasping arms into the at-rest position, and a first hydraulic cylinder attached to an activating element for moving the grasping arms from the at-rest position into the grasping position. The lifting and dumping mechanism is coupled to the grasping mechanism for moving the grasping mechanism from a refuse container grasping position to a dumping position. The lifting and dumping mechanism includes elongated linking arms and a driving hydraulic cylinder coupled in a four point movement for simultaneously lifting and rotating the grasping mechanism from the refuse container grasping position into the dumping position.
    Type: Application
    Filed: November 3, 2004
    Publication date: May 18, 2006
    Inventor: Larry Brunn