Patents by Inventor David A. Shell

David A. Shell 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: 8807283
    Abstract: A lift apparatus configured to move a passenger platform of the lift apparatus between a first position and an elevated second position. A stairway of the example lift apparatus may be used as a stairway when the passenger platform is arranged in the first position. As the passenger platform is raised to the elevated second position, hinged steps of the stairway are transformed into a horizontal surface.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: August 19, 2014
    Inventors: Dennis Shell, David Shell
  • Publication number: 20100176944
    Abstract: A lift apparatus configured to move a passenger platform of the lift apparatus between a first position and an elevated second position. A stairway of the example lift apparatus may be used as a stairway when the passenger platform is arranged in the first position. As the passenger platform is raised to the elevated second position, hinged steps of the stairway are transformed into a horizontal surface.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 15, 2010
    Inventors: Dennis Shell, David Shell
  • Patent number: 5307751
    Abstract: A compact, cleat-like, device for connecting the ends of a rope together where the rope is in tension. The device is generally planar, with two approximately flat surfaces, two approximately parallel sides and trifurcated ends. A central aperture is provided through the flat surfaces. The channels between the three end fingers are tapered, with the apices extending toward the aperture. In use, rope ends are inserted through the aperture, wrapped around two opposite channels and inserted back through the aperture. The device safely and securely maintains the connection between the rope ends. The rope can be easily removed, even with the rope in tension, by pulling one end of the rope back through the eye and unwrapping it from the channels.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: May 3, 1994
    Inventor: David Shell
  • Patent number: 5230295
    Abstract: A generally elongate fitting has, at a distal end, a hook for hooking an external object, and, at a proximal end, an eye and a cleat for attaching a rope. An eye hook with an eye at its proximal end, a hook at its distal end, and a connecting shank between the hook and the eye is formed integrally with a modified cleat that has both (i) a pair of projecting arms and (ii) a projecting arm. The pair of projecting arms extends proximally from the region of the eye so as to form a "V" channel between them. The projecting arm extends distally from the region of the eye at an incline to the shank so as to form another "V" channel. Both channels are suitable to compressively engage a rope that is forcibly wedged within such channel. A rope slipped through the eye is pulled taught against the eye, and not against either channel, until, a desired tension in the rope having been achieved, the rope is easily, while still held taut, angled into that channel of the cleat which is formed between the two projecting arms.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: July 27, 1993
    Inventor: David A. Shell
  • Patent number: 5209173
    Abstract: A generally elongate fitting has a distal-end region for affixing an external object, a mid-region eye, and a proximal-end region for attaching a rope. In one embodiment, the distal-end and middle regions are configured as an eye hook having an eye at its proximal end, a hook at its distal end, and a connecting shank between the hook and the eye. In another embodiment, the distal-end region is configured as a base member bolt-mounted to the external object, a rotating member rotatably mounted to the base member, and an arm pivotally mounted to the rotating member, forming thereby a swivel joint. In this embodiment the mid-region's eye is integrally within the arm. In both embodiments the distal- and mid-regions are formed integrally with a proximal-end region defining one or more "V" channels. In one embodiment "V" channels are formed as a modified cleat having both (i) a pair of projecting arms and (ii) one or more additional projecting arms.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: May 11, 1993
    Inventor: David A. Shell