Patents by Inventor Larry D. Mitchell

Larry D. Mitchell 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: 4612679
    Abstract: A side guard for a hospital bed moves between elevated and depressed positions on parallel swing arms that are quite short and extend from a base mounted on the back section of the bed. It further has an upper section which pivots outwardly and downwardly to a retracted position to substantially reduce the height of the side guard. When the side guard is in its depressed position with its upper section folded to the retracted position, the side guard lies entirely below the mattress supporting surface of the bed back section and therefore does not interfere with bed making. Also the upper section may carry a bed control unit, or a telephone, or controls for other electrically operated devices, and when in its extended position, these devices are presented inwardly toward the occupant of the bed, but when the upper section is in its retracted position, they are presented outwardly where they are conveniently accessible to one sitting or standing beside the bed.
    Type: Grant
    Filed: March 1, 1984
    Date of Patent: September 23, 1986
    Assignee: Amedco Health Care Inc.
    Inventor: Larry D. Mitchell
  • Patent number: 4398313
    Abstract: Independently operable lifting mechanisms are provided at the head and foot ends of the fixed lower base frame of an adjustable hospital bed in order to facilitate independent height adjustment of the head and foot ends of the bed's movable upper frame. The lifting mechanisms are actuated by respective drive screws which may be rotated individually or simultaneously and in either direction to position the upper frame at any desired height and at any selected tilt angle. By turning only one drive screw, one end of the upper frame is elevated or lowered and the tilt angle will be changed. By rotating both drive screws simultaneously, the upper frame will be raised or lowered at a constant tilt angle. A manual control system provides for selective manual engagement of the lifting mechanisms and automatic disengagement thereof. When engaged, the lifting mechanisms may be manually actuated.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: August 16, 1983
    Assignee: B-W Health Products, Inc.
    Inventor: Larry D. Mitchell
  • Patent number: 4391007
    Abstract: An adjustable wall-spacer is employed to position an adjustable hospital bed normally from a wall and prevent contact of the headboard with the wall when the bed is moved into raised or tilted positions.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: July 5, 1983
    Assignee: B-W Health Products, Inc.
    Inventors: Larry D. Mitchell, Charles W. Keith, Jr.
  • Patent number: 4062075
    Abstract: A bed having a torque-compensated parallelogram lifting arm arrangement. The bed has a subframe vertically adjustable by the parallelogram lifting arm arrangement and thereby retains a level relationship at all height adjustment levels.An articulated mattress support surface is provided, which is formed by articulated pivotally interconnected head or back, seat, thigh and leg sections mounted on the level vertically adjustable subframe. The seat section is double-pivoted, and enables simple and effective Trendelenburg and Reverse Trendelenburg positioning independent of any position of the height-adjustable supporting subframe. The seat, thigh, and head sections are articulated by cam and cam follower drive arrangements. Selective pivot defeat means are provided to enable selective pivotal lowering of the thigh and head or back sections without pivoting the seat section, and independent of the supporting subframe position, enabling simple and effective hyperextension positioning.
    Type: Grant
    Filed: July 23, 1976
    Date of Patent: December 13, 1977
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Robert G. Stern, Larry D. Mitchell
  • Patent number: 4012031
    Abstract: A unitary pilot-operated bi-directional cylinder lock valve and pressure-compensated flow control valve arrangement, having a common housing with internal porting connecting a pair of oppositely acting normally closed check valves operated to open by fluid pressure in one direction thereagainst on the inlet side and by a common free-floating inlet-pressure-responsive pilot piston therebetween. Also in the common housing and ported in line with each of the check valves are two pressure-compensated flow control valves which restrict fluid flow through the check valves as a function of flow pressure. The pressure-compensated flow control valves are also oppositely acting and each senses and acts to reduce fluid flow in response to pressure build-up in an opposite direction from that of the other.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: March 15, 1977
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Larry D. Mitchell, Edward M. Mason
  • Patent number: 3982741
    Abstract: An operating table with geometrically compensated differentially movable load-sharing multiple hydraulic actuating cylinders is provided, which enables the employment of identical diametered tandem fluid connected cylinders through differential geometrical cylinder mounting and mechanical movement interconnection proportional to the cylinders' fluid-connected compression-to-tension end effective area ratio.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: September 28, 1976
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Larry D. Mitchell, Murray Q. Tanner, III
  • Patent number: 3980288
    Abstract: An operating table having a longitudinally adjustably slidable patient supporting table top, the various top sections of which have radio-translucent patient-support panels which, together with the slide arrangement, enable positioning of any top sections for alignment and use with an X-ray photographic or image intensifier apparatus. The table top slide arrangement incorporates four spaced linear ball bushings in which a slide shaft is slidable to enable the desired ease of top positioning to a desired longitudinal position while tilted, flat, and evenly or unevenly loaded or unloaded.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: September 14, 1976
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Larry D. Mitchell, Murray Q. Tanner, III
  • Patent number: 3977664
    Abstract: A hydraulic control valve arrangement for operating tables or the like, in which the table has both table top function control valves and associated hydraulic movement actuation cylinders and an elevate function valve and associated hydraulic elevation cylinder, and in which the elevate function control valve is operated by a separate control lever and is in overriding control of fluid supply pressure to the separate control lever-actuated table top function control valves, whereby either the elevate cylinder or a table top function actuation cylinder may be individually operated at one time, but not both the elevate cylinder and a table top function control cylinder, and whereby it is not necessary to switch a single control lever back and forth between elevate position and a selected table top function control position in order to selectively alternately effect elevation adjustment and a given selected table top function adjustment of the table top for desired table top positioning.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: August 31, 1976
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Larry D. Mitchell, Edward M. Mason
  • Patent number: 3972081
    Abstract: A bed having a torque compensated parallelogram lifting arm arrangement. The bed has a subframe vertically adjustable by the parallelogram lifting arm arrangement and thereby retains a level relationship at all height adjustment levels.An articulated mattress support surface is provided, which is formed by articulated pivotally interconnected head or back, seat, thigh and leg sections mounted on the level vertically adjustable subframe. The seat section is double-pivoted, and enables simple and effective Trendelenburg and Reverse Trendelenburg positioning independent of any position of the height-adjustable supporting subframe. The seat, thigh, and head sections are articulated by cam and cam follower drive arrangements. Selective pivot defeat means are provided to enable selective pivotal lowering of the thigh and head or back sections without pivoting the seat section, and independent of the supporting subframe position, enabling simple and effective hyperextension positioning.
    Type: Grant
    Filed: August 20, 1973
    Date of Patent: August 3, 1976
    Assignee: Affiliated Hospital Products, Inc.
    Inventors: Robert G. Stern, Larry D. Mitchell