Patents by Inventor Gary W. Erholm

Gary W. Erholm 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).

  • Patent number: 4364434
    Abstract: A bucket mounted ground-raking and rock-gathering attachment is picked up off the ground following rock-gathering, by operation of hydraulic cylinders on the tractor provided for lifting and lowering the bucket. The tractor is then driven to a dumping site whereat a passive tension strap, interconnected between a top portion of the attachment and an upper portion of the bucket support frame, holds the attachment in a substantially level position. Then, hydraulic cylinders on the tractor are operated to rotate the bucket, for dumping the debris, while the attachment is substantially maintained in position. A passive tension strap, interconnected between the top of the bucket and the top of the attachment to limit the extent of downward pivotal movement of the attachment relative to the bucket, bends to permit such dumping rotation of the bucket.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: December 21, 1982
    Inventor: Gary W. Erholm