Abstract: The chair includes a movable seat and back that are configured to enhance the patient's comfort by providing lumbar support when the chair is in the recumbent position and by minimizing patient sliding within a moving chair. Chair movement is controlled by a microprocessor-based control system that includes sensing mechanisms for precisely monitoring the chair position. The sensing mechanisms are employed in conjunction with a memory device to permit the user to define a particular position into which the chair will move any time the appropriate switch is closed by the user. The chair control system diagnoses malfunctioning chair components and generates and displays data indicating the particular malfunctioning component.

Abstract: The apparatus secures a dental instrument holder to the movable backrest of a dental chair. The apparatus maintains a preselected orientation of the holder irrespective of movement of the backrest.

Abstract: Special attachments mounted on a carriage assembly of a lift truck normally require one or more hydraulic cylinders to effect the various work tasks. A plurality of flexible hoses are normally routed over a mast assembly of the lift truck and are suitably connected to the cylinders to communicate pressurized hydraulic fluid. Such routing arrangements normally impair the forward visibility of the operator and do not always provide for a compact and protected disposition of the hoses on the mast assembly. The routing arrangement (24) of this invention includes a plurality of sheaves (28) and brackets (33) for mounting and guiding loop portions (25) of flexible hoses (21) on a movable upright assembly (14) in vertically spaced and closely compacted relationship to permit vertical movements of the movable upright assembly (14) relative to the hoses (21).