Patents by Inventor Robert L. Duncan

Robert L. Duncan 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: 11910932
    Abstract: A motion seat is described that includes a chassis, a seat frame, a seat cushion, a backrest, and a resilient hinge. The seat frame is attached to the chassis and the seat cushion and the backrest are each attached to the seat frame. The resilient hinge formed as a unitary body and may be formed from a resilient polymer. The seat cushion and/or the backrest is pivotably attached to the seat frame with the resilient hinge.
    Type: Grant
    Filed: February 13, 2023
    Date of Patent: February 27, 2024
    Assignee: American Leather Operations, LLC
    Inventors: Jeff Weber, Anders Larsen, Douglas L. Gasal, Jared Hurd, Robert B. Duncan, Kevin Nguyen
  • Patent number: 4240152
    Abstract: A system for locating and determining the distance to an object with respect to a movable vehicle is provided which utilizes at least three transducers wherein at least two of the three transducers operates either as a receiver transducer, in which case the remaining transducer operates as a transmitter transducer, or two of the three transducers operate as transmitter transducers in which case the remaining transducer operates as a receiver transducer with the system also including means for sequentially operating the three transducers for sending and receiving reflected ultrasonic signals to simultaneously determine both the location and distance of persons or objects with respect to the transducers.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: December 16, 1980
    Inventors: Robert L. Duncan, Paris H. Wiley
  • Patent number: 4139620
    Abstract: 1-Substituted-3-aminoethoxypyrrolidines having the formula ##STR1## WHEREIN R is benzyl, 2-ethoxyphenoxylower-alkyl, 2-propionyloxy-ethyl, 2-methoxy-4-acetylphenoxylower-alkyl, 4-fluorophenoxy lower alkyl, benzoyloxylower-alkyl, 3,4,5-trimethoxybenzoyloxylower-alkyl, 3,4,5-trimethoxybenzoyl, N-(4-methoxyphenyl) carbamoyl, 2-methoxyphenoxylower-alkyl, 3,4,5-trimethoxyphenyl-acetyl, 2-piperidinoethyl or carbamoyl, and Am is dilower-alkylamino, morpholino or piperidino having hypotensive properties are disclosed.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: February 13, 1979
    Assignee: A. H. Robins Company, Inc.
    Inventors: Robert F. Boswell, Jr., Robert L. Duncan, Jr.
  • Patent number: 4097565
    Abstract: Method and apparatus for curing a tire having an internal cavity using as heat and fluid pressure media first steam and then cooler inert gas. The time rate of pressure loss in the cavity is determined in each tire curing cycle by closing the cavity so as to form a completely closed chamber for a test time less than the normal cure time for the tire. Pressure loss during the test time is monitored and if determined to be at a greater than tolerable rate a warning device is actuated and means for loading a next tire into the mold is rendered inactive.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: June 27, 1978
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Clarence R. Cole, Robert L. Duncan
  • Patent number: 3942922
    Abstract: Apparatus for curing a tire having an internal cavity using as heat and fluid pressure media first steam and then cooler inert gas. The time rate of pressure loss in the cavity is determined in each tire curing cycle by closing the cavity so as to form a completely closed chamber for a test time less than the normal cure time for the tire. Pressure loss during the test time is monitored and if determined to be at a greater than tolerable rate a warning device is actuated and means for loading a next tire into the mold is rendered inactive.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: March 9, 1976
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Clarence R. Cole, Robert L. Duncan