Horizontally supported planar surfaces – Vertically adjustable – With force-multiplying means
Reexamination Certificate
2005-08-30
2005-08-30
Chen, Jose V. (Department: 3637)
Horizontally supported planar surfaces
Vertically adjustable
With force-multiplying means
C248S188400
Reexamination Certificate
active
06935250
ABSTRACT:
An improved elevating table apparatus provides a plurality of at least three telescoping legs that support a table top having an underside and an upper surface that provides a work surface upon which can be placed computers, office equipment and the like. A gear cluster is provided at the top of each leg that includes a plurality of gears, preferably bevel gears, that are engaged during use. Each leg has a hollow interior that holds a generally vertically extending, externally threaded rod, the rod having an upper end portion with a gear that forms a part of the gear cluster and a lower end portion that threadably engages a section of the leg. A single crank provides a drive shaft with a gear that forms a part of one of the gear clusters. A plurality of connecting linkages or connecting rods are provided that connect a center of the gear clusters to each of a pair of side gear clusters. When the single crank is rotated, all of the gear clusters and connecting rods or linkages rotate, each connecting rod or linkage having a gear at a connecting rod or linkage end portion that forms a part of a gear cluster. In this fashion, the crank can be rotated in one rotational direction that extends the length of each of the legs and elevates the table top. When the crank is rotated in an opposite rotational direction, all of the legs shorten in length so that the table top is lowered.
REFERENCES:
patent: 544836 (1895-08-01), Vetter
patent: 1243750 (1917-10-01), Miller
patent: 2532342 (1950-12-01), Sloane
patent: 2642996 (1953-06-01), Oeler et al.
patent: 2982050 (1961-05-01), May
patent: 3140559 (1964-07-01), Grow et al.
patent: 3273517 (1966-09-01), Amthor, Jr., et al.
patent: 3364881 (1968-01-01), Kooi
patent: 3638584 (1972-02-01), Cisler et al.
patent: 3820176 (1974-06-01), Feiertag
patent: 3887155 (1975-06-01), Bertalot
patent: 3908560 (1975-09-01), Horner
patent: 4130069 (1978-12-01), Evans et al.
patent: 4469029 (1984-09-01), Ramond
patent: 4591214 (1986-05-01), Reuter et al.
patent: 4615279 (1986-10-01), de la Haye
patent: 4637322 (1987-01-01), Hampshire et al.
patent: 4751884 (1988-06-01), Ball
patent: 4981085 (1991-01-01), Watt
patent: 5041770 (1991-08-01), Seiler et al.
patent: 5230290 (1993-07-01), Crossman
patent: 5289782 (1994-03-01), Rizzi et al.
patent: 5322025 (1994-06-01), Sherman et al.
patent: 5323695 (1994-06-01), Borgman et al.
patent: 5339750 (1994-08-01), Smies
patent: 5370063 (1994-12-01), Childers
patent: 5408940 (1995-04-01), Winchell
patent: 5845590 (1998-12-01), Seidl
patent: 5890438 (1999-04-01), Frankish
patent: 6148741 (2000-11-01), Motta
patent: 6289825 (2001-09-01), Long
patent: 6474246 (2002-11-01), Hsu
Baker Manufacturing Company, Inc.
Chen José V.
Garvey, Jr. Charles C.
Garvey, Smith, Nehrbass & Doody, L.L.C.
LandOfFree
Adjustable height table with multiple legs operable by a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable height table with multiple legs operable by a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable height table with multiple legs operable by a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3449329