Patents by Inventor Jonathan C. Sheiman

Jonathan C. Sheiman 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: 5181741
    Abstract: An improved sled for recreational use. The sled comprises a support member which is formed in the shape of a seat to accommodate a rider in an upright position. The support member has handholds at either edge for the rider to grasp. A block of ice is coupled to the bottom side of the support member. The ice is held in place by an adjustable retention member. The retention member is made up of two support blocks which are rigidly attached to the support member. A compression block is adjustably connected to each of the support blocks by means of a locking screw disposed through the support blocks. As the screw is turned, the compression blocks move inwardly clamping the ice. In alternative embodiments of the retention member, the locking screws are replaced by springs which automatically force the support blocks inward and pieces of flexible foam rubber are used to hold the ice block in place.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: January 26, 1993
    Inventors: Lawrence S. Sheiman, Jonathan C. Sheiman
  • Patent number: 5039130
    Abstract: An improved sled provides a support member having an ice block removably coupled to its underside. The ice block is coupled to the support member by an adjustable retention means. A pair of support blocks are connected to the underside of the support member and have threaded holes disposed therethrough. Locking screws are placed through each of the holes, and are coupled to compression blocks. As the locking screws are turned, the compression blocks move inwardly, thereby gripping the ice block. As the ice melts, the locking screws can be tightened, so as to maintain a firm grip on the ice. In the preferred embodiment, the support member is formed in the shape of a seat.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: August 13, 1991
    Inventors: Lawrence S. Sheiman, Jonathan C. Sheiman