Patents Assigned to Sigma Development Corp.
  • Patent number: 4351378
    Abstract: A hydraulic logsplitter assembly including a logsplitting mechanism and comprising means for charging logs thereto consisting of:a boom,a support mechanism supporting the boom and disposed at an angle from the vertical centerline for facilitating the free swinging of the boom at an angle from on an inclined plane under the weight of a load between charging and discharging positions,a base for rotatively supporting the support mechanism,a torsion spring interconnecting the base and support mechanism for the swinging returnably of the boom from discharging to charging position,a cable supported by the boom,a grapple unit mounted at the free end of the cable.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: September 28, 1982
    Assignee: Sigma Development Corp.
    Inventor: Harvey A. Smith