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US 8,025,336 B2Granted
Dental chair
AssigneeMidmark Corporation
InventorLeo R. Hanus
Life of this patent
Estimating the term…
Abstract
A dental chair for supporting a patient during examination and the performance of procedures on the patient includes a patient support having a seat and a back, a base adapted to engage a floor surface, and a lift arm. The lift arm has a first end pivotally coupled to support structure at a first, terminal end of the base for rotation about a pivot axis defined by the support structure. A second end of the lift arm is coupled to the patient support.
Claims4
An examination and treatment chair, comprising:
- a patient support including a seat and a back;
- a base adapted to engage a floor surface, said base having a first terminal end;
- a support structure at said first terminal end of said base and extending vertically from said base, said support structure defining a pivot axis proximate said first terminal end;
- a lift arm having a first end pivotally coupled to said support structure for rotation about said pivot axis, and a second end coupled to said patient support;
- wherein said lift arm comprises a frame having first and second lateral sides spaced from a longitudinal centerline of said lift arm;
- an actuator having a first end connected to said base and having a second end connected to said lift arm, said actuator operable to move said lift arm for rotation about said pivot axis;
- said actuator offset from said longitudinal centerline in a direction toward one of said first and second lateral sides;
- wherein said actuator is a hydraulic cylinder;
- and
- a pump in fluid communication with said hydraulic cylinder;
- said pump mounted on said base and positioned behind said pivot axis in a direction away from said first terminal end of said base.
8 more elements
An examination and treatment chair, comprising:
- a patient support including a seat and a back;
- a base adapted to engage a floor surface, said base having a first terminal end;
- a support structure at said first terminal end of said base and extending vertically from said base, said support structure defining a pivot axis proximate said first terminal end;
- a lift arm having a first end pivotally coupled to said support structure for rotation about said pivot axis, and a second end coupled to said patient support;
- wherein said lift arm comprises a frame having first and second lateral sides spaced from a longitudinal centerline of said lift arm, and including strengthening structure extending from said first lateral side to said second lateral side;
- an actuator coupled between said base and said lift arm and operable to move said lift arm for rotation about said pivot axis;
- said actuator offset from said longitudinal centerline in a direction toward one of said first and second lateral sides;
- and
- a load bearing panel coupled to said lift arm and fastened at least proximate said first and second sides, said load bearing panel resisting twisting of said lift arm when loaded;
- a pump in fluid communication with said actuator;
- said pump mounted on said base and positioned behind said pivot axis in a direction away from said first terminal end of said base.
8 more elements
Dependencies are inferred from the claim text.