Patents by Inventor Francis A. Roth

Francis A. Roth 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: 6007115
    Abstract: A door lock assembly comprising a housing that is received in a mortise in the door with a bolt that is retractable into the housing to permit opening of the door and extendable from the housing to secure the door in its closed position. The bolt has a first portion received within the housing. A second portion is pivotally attached to the first portion so that the second portion can pivot with respect to the first portion when the bolt is extended from the housing, thus permitting opening of the door without the use of a key or rotation of a doorknob. A latch mounted within the opening of a door frame is selectively moveable from a first position engaging the second portion of the bolt when the door is closed in order to prevent the second portion of the bolt from pivoting with respect to the first portion, thus locking the door in the closed condition. When the latch is moved to its second position the second portion of the bolt can pivot with respect to the first portion to allow the door to be opened.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: December 28, 1999
    Inventor: Francis A. Roth
  • Patent number: 5771327
    Abstract: A fiber optic probe protector for protecting a fiber optic probe such that sterilization of the probe after each use is not necessary. The fiber optic probe protector includes a sheath, a window and a handle. The sheath defines a tubular configuration, a first end, and a second end and the window is mounted in the first end of the sheath. The handle defines a first end, a second end, an interior cavity and a locking means. The second end of the sheath is mounted to the first end of the handle and the interior cavity of the handle and the sheath provide a passage for a fiber optic probe therethrough such that the face of the probe abuts against the window. The locking means locks the fiber optic probe in position. The fiber optic probe protector also includes a vacuum assembly which when hooked to a vacuum removes secretions or fluid from the surface to be analyzed with the probe.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: June 23, 1998
    Assignee: Optical Biopsy
    Inventors: David Bar-Or, James S. Kimmel, Francis A. Roth
  • Patent number: 5702351
    Abstract: A disposable laryngoscope blade connects to a handle especially to facilitate endotracheal intubation of a patient. The blade includes a base portion that attaches to the handle, and an elongated blade portion extends from a proximal end to terminate in a distal tip. The blade portion is arcuate and flattened so as to have a flat upper wall and a flat lower wall joined at lateral edges, and the lateral edges converge toward the distal tip. The blade includes a passageway therethrough so that a vacuum source may attach to a nipple near the proximal end and an inlet port is formed near the distal tip so that fluids may pass through the blade portion. The handle carries a battery power source and electrical contacts. The base portion of the blade also has contacts so that, when the blade is mounted a circuit is completed to power a light source disposed on the blade portion.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: December 30, 1997
    Inventors: David Bar-Or, James S. Kimmel, Francis A. Roth
  • Patent number: 4461378
    Abstract: A conveyor assembly follows a pathway defined by a supporting framework, wherein the pathway may include serpentine portions. The framework supports a transport mechanism for movement along the pathway, and a belt assembly is carried by the transport mechanism. The belt assembly includes a continuous belt having flexible convolutions permitting the belt to follow serpentine portions of the pathway and also permitting the belt to locally laterally tilt for side discharge without requiring the transport mechanism to similarly tilt. A pivotal member between the transport mechanism and belt assembly permits the belt to tilt laterally, such as on a hinge point laterally offset from the center of the conveyor pathway. An actuator causes a selected portion of the belt to tilt on the hinge point.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: July 24, 1984
    Assignee: Robert L. Alldredge
    Inventor: Francis A. Roth