Patents Assigned to MAC Corporation
  • Patent number: 5961015
    Abstract: An umbrella support attachment for a bicycle is provided which comprises a distal portion support member including a fastening portion to be attached to a seat stay of the bicycle and a support portion for supporting a distal portion of the umbrella, and a proximal portion support member including a fastening portion to be attached to a frame bar of the bicycle and a clipping portion for supporting a proximal portion of the umbrella. The umbrella support attachment is effective to carry an elongate object such as an umbrella on a bicycle without interfering with the operation of the bicycle and smooth movement of movable components of the bicycle.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: October 5, 1999
    Assignee: MAC Corporation
    Inventor: Masahiro Shirakawa
  • Patent number: 5052630
    Abstract: This invention relates to a shredder which has a single rotating shaft with a plurality of large and small diameter blades in a side-by-side relationship down the length of the shaft. The blades cooperate with fixed shear bars mounted on the first and the second side of the shredder. The shredder can operate in a shredding mode in a forward and a reverse direction. The shredder is driven by a hydraulic motor. The hydraulic motor has a control circuitry, which detects an overload condition in either the foward or the reverse direction. Should an overload condition be detected, the shredder will automatically reverse to eliminate the jammed condition. In normal operation, the shredder cycles for a pre-set time period in a first direction, stops, and then cycles for a second pre-set time period in a reverse direction.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: October 1, 1991
    Assignee: MAC Corporation
    Inventors: Michael E. Hinsey, Avon E. Bathe
  • Patent number: 4043505
    Abstract: A mobile irrigating system comprising a plurality of wheel mounted irrigating pipes coupled together in a line to a central, motorized power unit having a reversible, internal combustion engine which is remotely controllable from the end of the line of irrigating pipes.
    Type: Grant
    Filed: May 27, 1976
    Date of Patent: August 23, 1977
    Assignee: MAC Corporation
    Inventor: Roger M. Sherman