Portable optometric support stand

US6161807A · kind A · utility

Inventors

• Michael Steiner · San Francisco, US
• Nicholas Breigenzer · Kent, US

Key dates

• Filing date: Oct 30, 1997
• Grant date: Dec 19, 2000
• Expiry date: Oct 30, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16M2200/028
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A portable, optically-stable stand, sized to fit over a bed or chair, such as a wheel chair, adapted to collapse with pivoting legs compactly folded parallel to a main beam, is configured to unfold with all support legs mutually diverging. On the main beam is removably attached a vertical post. Eye examination equipment is mounted height-adjustable to the vertical post with a sleeve sliding over the post, regulated with rack and gear. The main beam and legs are telescoping to enhance compactness. The legs are secured in an optically stable support position with leg proximal ends pivotably received in a slot with a slot flat end. With the pivoting legs diverging in said support position, a leg end terminating in an oblique, flat surface is leans in face-to-face contact against the slot flat end to limit further pivoting. In the primary embodiment, the legs unfold from a stored position in double-axis rotation, with first a vertical rotation of a bar in a tube attached to each end of the main beam followed by a vertical rotation of each leg, pivotably attached to the bar, in a plane generally transverse to the main beam. In an alternative embodiment, a bar is affixed transversely to …