Lifting device for a dentist chair

Details Lifting device for a dentist chair Lifting device for a dentist chair

1983-07-22

1985-08-06

Machado, Reinaldo P.

Supports

Stand

Adjustable vertically

297345, A61G 1500

Patent

active

045331065

ABSTRACT:
A lifting device, particularly for a dentist chair incorporating support arms arranged in a scissor form between a base portion and a seat support portion which is height adjustable relative thereto. The scissor action support mechanism comprises two support arms arranged in a single scissor's pair to realize an extremely compact yet rugged design. Each support arm includes two arm parts - a shorter arm and a longer arm - which are joined at one of their ends by a lateral stiffening section. The two support arms are arranged to face each other and are joined by an axle bearing which ties the two shorter arm parts to each other thus creating the scissor lifting structure. The free ends of the longer arms are mounted on lower and upper horizontal guides. A spindle driver applying forces at or near the axle bearing is used for lowering or raising the seat. The scissor arms are fully collapsible and because of the double arm construction a rugged, tension-stiff assembly results.

REFERENCES:
patent: 3086742 (1963-04-01), Severson
patent: 3182947 (1965-05-01), Tanaka
patent: 3522925 (1970-08-01), Buchtel
patent: 4295627 (1981-10-01), Graves

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