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US 7,111,825 B2Granted
Non-metallic laboratory jack
AssigneeBel-Art Products, Inc.
InventorsDavid Landsberger, Francis Gomes, Paul Thom, Bruce Feller
Life of this patent
Estimating the term…
Abstract
A non-metallic laboratory jack comprises two oppositely disposed reinforcing elements having I-beam cross-sectional configuration disposed in the central elevational region of the jack; a base position below the reinforcing elements and a load-bearing platform positioned above the reinforcing elements and a plurality of pairs of cross links. A rotatable threaded shaft associated with the reinforcing elements.
Claims19
A non-metallic laboratory jack, comprising:
- two oppositely disposed elongated reinforcing elements, a base positioned below said reinforcing elements, a load-bearing platform positioned above said reinforcing elements, a plurality of pairs of crossing links associated with said base load-bearing platform and said reinforcing elements;
- a rotatable threaded shaft associated with said reinforcing elements, said threaded shaft upon rotation in one direction draws said reinforcing elements together to raise said load-bearing platform and upon rotation in the opposite direction forces said reinforcing elements apart to lower said load-bearing platform,
- whereby each said elongated reinforcing element is provided in the central elevation region of the laboratory jack and is formed having an I-beam cross-sectional configuration with two elongated spaced apart substantially vertical side walls interconnected by a core element situated transversely to said side walls.
A non-metallic laboratory jack comprising:
- two oppositely disposed reinforcing elements, a base positioned below said reinforcing elements, a load-bearing platform positioned above said reinforcing elements, a plurality of pairs of crossing links associated with said base, said load-bearing platform and said reinforcing elements;
- and
- said plurality of pairs of crossing links consists of two scissor sub-assemblies spaced from each other, each scissor sub-assembly consists of two pairs of arms crossing each other, so that each sub-assembly consists of a pair of upper arms and a pair of lower arms movably associated with said reinforcing elements;
- wherein at least two upper and lower stiffening plates are provided in a substantially parallel relationship to each other between respective two oppositely disposed substantially parallel lower arms and between two oppositely disposed substantially parallel upper arms.
1 more element
Dependencies are inferred from the claim text.