Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1988-08-24
1990-01-16
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
108144, B64C 1706
Patent
active
048946001
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention pertains to the general field of work stations, and more particularly to adjustable and portable work stations that are variable in height and tilt to facilitate wheelchair confined physically challenged and developmentally disabled workers.
BACKGROUND ART
Previously, many types of desks, tables, and cabinets have been developed or specific purposes. Many devices contain height adjusting or angle adjusting features for specific purposes, such as drawing boards or platforms for office equipment.
A search of the prior art did not disclose any patents that read directly on the claims of the instant invention, however, the following U.S. Patents were considered related:
______________________________________ U.S. Pat. No.
Inventor Issue Date
______________________________________
4,576,424 Nelson Mar. 18, 1986
4,345,803 Heck Aug. 24, 1982
3,938,766 Herbolsheimer et al
Feb. 17, 1976
3,696,760 Riley Oct. 10, 1972
3,087,767 Schell Apr. 30, 1963
3,048,461 Peterson Aug. 7, 1962
2,614,018 Engel Oct. 14, 1952
______________________________________
Nelson teaches a cabinet with drawers and a top that may be lifted and rotated outwardly to form a drawing board which is angularly adjustable and includes knee room to sit in front thereof.
Heck discloses a work station angular desk for an office machine that has a recess in the center surface extending to the front edge providing a lower level recess area for an office machine. The desk is free standing and has a pair of opposed deenergizing side sections. However, no height adjustment is disclosed.
Herbolsheimer et al utilize an adjustable platform mechanism including a U-shaped base plate which is horizontally mounted at a spaced distance below the desk top. Four jack screws are positioned between the desk top and the platform and means are provided to simultaneously rotate all of the jack screws using a manual handle.
Riley teaches a modular classroom table that has a plurality of inclined desk surfaces along one edge of a horizontal top. These desk surfaces are independently raised or lowered to fit the individual student. The opposite edge is provided with a plurality of cut-outs which, when combined with other like tables define geometrical figures, such as circles or semi-circles. Height adjustment of the desk surface is accomplished using threaded fasteners through slots with wing nuts creating a structural connection.
Peterson practices an automatic desk for the disabled, particularly the wheelchair confined. The desk is provided with remotely controlled desk trays which are electrically movable from a remote, out of the way position on the desk top to an accessible location. Further, the desk is furnished with electrically actuated means for extending a telephone from the desk top to the user with a combination of drive pulleys and belts using an electrical reversible motor. A recess is included in the front edge of the desk to permit entry of a lap board and wheelchair control box. A central control panel is available to the worker to control the trays, phone, etc., remotely.
For background purposes and as indicative of the art to which the invention relates, reference may be made to Schell and Engel.
DISCLOSURE OF THE INVENTION
Prior art has attempted to assist wheelchair confined, physically-challenged workers by placing certain specific articles within their reach. Also multiple-use desks and cabinets have been developed to expand the utility of working areas. The need continues to exist for a work station that fits any wheelchair in height and allows the worker an expanded three sided surface from the center of the work area. The instant invention does just that. Therefore, a primary object of the invention is the ability to easily adjust the height and tilt of the apparatus by electrical means readily available to the worker with a configuration that allows access to the top, on not only the center, but also on both sides. A second embodiment allows adjustment for a particular wheelchai
REFERENCES:
patent: 1293952 (1918-10-01), Shirley
patent: 2614018 (1952-10-01), Engel
patent: 3048461 (1962-08-01), Peterson
patent: 3087767 (1963-04-01), Schell
patent: 3696760 (1972-10-01), Riley
patent: 3938766 (1974-12-01), Herbolsheimer et al.
patent: 4315466 (1982-02-01), Boerigter
patent: 4345803 (1982-08-01), Heck
patent: 4365561 (1982-12-01), Tellier et al.
patent: 4576424 (1986-03-01), Nelson
patent: 4705327 (1987-11-01), Bollman
Cota Albert O.
Martin David
Shoop Jr. William M.
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