Patents by Inventor Robert M. Rinke

Robert M. Rinke 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: 5044465
    Abstract: A retractable walk-in swimming pool ladder includes a platform having side frames secured thereto. A plurality of steps extended between and are secured to the side frames. A first pair of rollers are journaled on the platform and a second pair of rollers are journaled on the side frames adjacent the lowermost step. Linkages pivotally connect the platform to the swimming pool deck and cooperate with the rollers to permit the swimming pool ladder to be readily retracted from and returned to the swimming pool.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: September 3, 1991
    Inventor: Robert M. Rinke
  • Patent number: 4848515
    Abstract: A portable, foldable swimming pool step device includes a pair of sectional stiles interconnected by transverse steps and provided with sectional handrail structures. The stiles, steps, and handrail structures are formed of a thermoplastic material. Each stile includes a pair of sections hingedly connected together and foldable between an extended operative position and a folded position. The steps are adjustable to permit the swimming pool step device to function as an inclined ramp. Suitable rollers are mounted on the stiles to permit easy movement of the swimming pool step device when the ladder is in the folded position.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: July 18, 1989
    Assignee: Sure-Step, Inc.
    Inventor: Robert M. Rinke
  • Patent number: 4599835
    Abstract: The present invention is a step assembly for insertion into swimming pools. A frame having a plurality of steps connected in an end-to-end fashion rests on the bottom of the pool and adjacent to a pool sidewall. An adjustable adapter step is connected near the top of the frame and overlaps a top rail of the pool sidewall. A ballast box is located near the bottom of the frame beneath a lower step to prevent the frame from floating in the water. A pair of hand rails are provided which extend above the steps on both sides of the frame to allow ease of entry and exit into the water. A cushioned strip is provided along the bottom and sides of the frame to guard against tears in a pool liner.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: July 15, 1986
    Assignee: Adventure Enterprises, Inc.
    Inventor: Robert M. Rinke
  • Patent number: D356164
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: March 7, 1995
    Inventor: Robert M. Rinke