Dental patient's chair
AssigneeDentech Products, Inc.
InventorPeter C. Boetzkes
Life of this patent
Estimating the term…
Abstract
A dental patient's chair which is fully and completely adjustable which includes a foot control system that eliminates the need to manipulate any hand-operated control knobs or levers. The dental patient's chair includes a linkage assembly which allows the seat to pivot and move in the same manner as the human body when the human body articulates about the complex pivot created at the pelvic bone, the upper legs, and the lower part of the backbone. The dental patient's chair allows the patient's body to remain in the same position relative to the backrest and the seat of the patient's chair as the chair is articulated in a variety of positions.
Claims23
A chair for a patient undergoing treatment, comprising:
- a seat frame assembly;
- a main frame assembly;
- a backrest assembly pivotally coupled to the main frame assembly, the seat frame assembly being located at a spaced distance from the backrest assembly when the backrest assembly is in an upright position;
- a linkage assembly interconnecting the seat frame assembly, the main frame assembly, and the backrest assembly, the linkage assembly being positioned exclusively beneath the seat frame assembly, the linkage assembly causing the backrest assembly to move greater than one-half of the spaced distance toward the seat rest assembly upon downward articulation of the backrest assembly, the seat frame assembly moving upwardly and rearwardly to compensate for and to simulate movement of a patient's pelvic bone, upper legs, and lower backbone such that a patient's body remains in a similar position relative to the backrest assembly and seat frame assembly.
A chair for a patient undergoing treatment, comprising:
- a seat frame assembly;
- a main frame assembly;
- a backrest assembly pivotally coupled to the seat frame assembly, the seat frame assembly being located at a spaced distance from the backrest assembly when the backrest assembly is in an upright position;
- linkage means for interconnecting the seat frame assembly, the main frame assembly, and the backrest assembly, the linkage means being positioned exclusively beneath the seat frame assembly, the linkage means causing the backrest assembly to move greater than one-half of the spaced distance toward the seat rest assembly upon downward articulation of the backrest assembly, the seat frame assembly moving upwardly and rearwardly to compensate for and to simulate movement of a patient's pelvic bone, upper legs, and lower backbone such that a patient's body remains in a similar position relative to the backrest assembly and the seat frame assembly.
A chair for a patient undergoing treatment, comprising:
- a seat frame assembly;
- a main frame assembly;
- a backrest assembly pivotally connected to the seat frame assembly, the seat frame assembly being located at a spaced distance from the backrest assembly when the backrest assembly is in an upright position;
- a linkage assembly interconnecting the seat frame assembly and the main frame assembly, the linkage assembly comprising a butterfly link and a boomerang link, the butterfly link have a top portion, a middle portion, and a bottom portion, the butterfly link being pivotally coupled to the main frame assembly at the middle portion, the butterfly link being pivotally coupled at the top portion of the seat frame assembly, the butterfly link being pivotally coupled at the bottom portion to the backrest assembly, the boomerang link having a top end and a bottom end, the top end being pivotally attached to the seat frame assembly and the bottom end being pivotally attached to the main frame assembly, the linkage assembly causing the backrest assembly to move greater than one-half of the spaced distance toward the seat rest assembly upon downward articulation of the backrest assembly relative to the main frame assembly.
Dependencies are inferred from the claim text.