Patents by Inventor Robert C. Stewart, deceased

Robert C. Stewart, deceased 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: 4345671
    Abstract: A guide rail section is pushed up a hoistway through a guide funnel by a hydraulic lift pad. The guide funnel is detachably mounted to a wall bracket. The guide rail section is retained in the hoistway while the lift pad is lowered. Another guide rail section is positioned on the lift pad and aligned with the guide rail section retained in the hoistway. The aligned guide rail sections are connected by a fishplate. The guide rail section retained in the hoistway is released and the lift pad is raised pushing the connected guide rail sections up the hoistway through guide funnels. The procedure is repeated until a stack of guide rail sections of the appropriate length is assembled.
    Type: Grant
    Filed: March 12, 1980
    Date of Patent: August 24, 1982
    Assignee: Westinghouse Electric Corp.
    Inventors: Larry P. Tosato, Henry A. Wehrli, Robert C. Stewart, deceased
  • Patent number: 4260318
    Abstract: Installation apparatus for installing pre-assembled escalators having upper and lower ends in an operating position between upper and lower landings, including wheeled support apparatus for supporting and transporting an escalator. Scissors lift apparatus mounted on the wheeled support apparatus, and a pivotal escalator truss support and locater assembly mounted on the scissors lip apparatus, cooperate to provide both vertical and angular adjustment of the escalator, in order to permit the upper end to be aligned with and then supported by a support wall associated with the upper landing, and to permit its lower end to be subsequently lowered into a pit associated with the floor of the lower landing.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: April 7, 1981
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert F. Holritz, Robert C. Stewart, deceased