Height adjustment mechanism for tables
First Claim
Patent Images
1. A height adjustment mechanism for a table, comprising:
- A) at least one leg assembly including a base, two spaced-apart vertical columns upstanding from the base, the two vertical columns each having two elongated vertical friction strips, the two elongated vertical friction strips of one of the two columns juxtaposed the elongated vertical friction strips of the other of the two columns;
B) one slidable post assembly slidably mounted on each leg assembly, the slidable post assembly including a pair of opposed connected sliding covers, one cover spanning the space between the two vertical columns and engaging one elongated vertical friction strip of each column, the other cover also spanning the space between the two vertical columns opposite the first cover and engaging the other elongated vertical friction strip of each column, and means connecting and securing the pair of covers together to frictionally clamp against the frictional strips of the columns, the upper ends of the covers secured to and supporting the table; and
C) drive means for driving the slidable post assembly and the table secured thereto up and down to an adjusted height, wherein the clamping frictional engagement between the covers and vertical columns provides a sturdy, rigid tabletop support and assists in holding the table at an adjusted height.
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Abstract
A height adjustment mechanism for a table top generally comprises two leg assemblies each having a base and two vertical columns, a slidable post assembly on each leg assembly with the slidable post, assemblies supporting the table top, and a drive for raising and lowering the leg assemblies and supported table top. The slidable post assemblies have opposed covers which frictionally engage the vertical posts to hold the table top at an adjusted height. The drive is a lack screw and jack nut in each leg/slidable post assembly, wherein the jack screws are connected by a chain and sprocket drive and are driven by a crank.
44 Citations
20 Claims
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1. A height adjustment mechanism for a table, comprising:
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A) at least one leg assembly including a base, two spaced-apart vertical columns upstanding from the base, the two vertical columns each having two elongated vertical friction strips, the two elongated vertical friction strips of one of the two columns juxtaposed the elongated vertical friction strips of the other of the two columns; B) one slidable post assembly slidably mounted on each leg assembly, the slidable post assembly including a pair of opposed connected sliding covers, one cover spanning the space between the two vertical columns and engaging one elongated vertical friction strip of each column, the other cover also spanning the space between the two vertical columns opposite the first cover and engaging the other elongated vertical friction strip of each column, and means connecting and securing the pair of covers together to frictionally clamp against the frictional strips of the columns, the upper ends of the covers secured to and supporting the table; and C) drive means for driving the slidable post assembly and the table secured thereto up and down to an adjusted height, wherein the clamping frictional engagement between the covers and vertical columns provides a sturdy, rigid tabletop support and assists in holding the table at an adjusted height. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A height adjustable table comprising:
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A) a tabletop; B) two leg assemblies, each leg assembly including a base, two spaced-apart rectangular vertical columns upstanding from the base, the two vertical columns each having two elongated vertical friction strips at the corners thereof, the two elongated vertical friction strips of one of the two columns juxtaposed the elongated vertical friction strips of the other of the two columns, and a channel mounted to and upstanding from the base between the vertical columns; C) two slidable post assemblies, one slidable post assembly associated with each leg assembly, respectively, each slidable post assembly including a pair of opposed connected sliding covers, one cover spanning the space between the associated two vertical columns and having in-turned marginal edges engaging one elongated vertical friction strip of each column, the other cover also spanning the space between the associated two vertical columns opposite the first cover and having in-turned marginal edges engaging the other elongated vertical friction strip of each column, and means connecting and securing the pair of covers together to frictionally clamp against the friction strips of the associated columns, the upper ends of the covers secured to and supporting the tabletop, and D) drive means for driving the slidable post assemblies and the tabletop secured thereto up and down to an adjusted height, the drive means including one jack screw mounted to each slidable post assembly and extending downwardly in the channel mounted to the base, a jack nut secured in each channel and threadably receiving the jack screw received in the channel, and means for coordinated rotation of the two jack screws to place the tabletop at an adjusted height, wherein the frictional engagement between the covers and vertical columns assists in holding the tabletop at the adjusted height.
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Specification