US20020083871A1 - Vertically adjustable table - Google Patents
Vertically adjustable table Download PDFInfo
- Publication number
- US20020083871A1 US20020083871A1 US10/061,300 US6130002A US2002083871A1 US 20020083871 A1 US20020083871 A1 US 20020083871A1 US 6130002 A US6130002 A US 6130002A US 2002083871 A1 US2002083871 A1 US 2002083871A1
- Authority
- US
- United States
- Prior art keywords
- structure according
- base frame
- slider
- lifting mechanism
- slider frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/20—Telescopic guides
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/02—Underframes
- A47B13/021—Fastening devices of the feet or legs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder
Abstract
An adjustable height table includes a base frame, a slider frame assembly, a generally planar support surface and a lifting mechanism. The main portion of the base frame is formed by welding three tubular components to form an H-shape. Each of the end portions of the H-shape include a mounting to support a swiveling locking castor. Above each castor there extends from the H-shaped main portion, a vertically extending tubular post. The slider frame assembly also includes an H-shaped main portion formed of three tubular members. Four vertically extending hollow tubular column members are attached to the H-frame so that they may telescopingly engage the four vertically extending posts of the base frame. A generally planar support surface is attached to the top of the four vertically extending columns located on the slider frame. Located between the central tube of the H portion of the base frame and central tube of the slider frame assembly, there is located a lifting mechanism, preferably a hydraulic jack. This jack can be actuated by a pedal mechanism to lift the slider frame assembly relative to the base frame. A second pedal is provided in the lifting mechanism to have the slider frame lower at a controlled rate of descent. Additionally an anti-sway bar is provided to prevent the lifting pump pedal from swaying side to side when in use.
Description
- 1. Field of the Invention
- The present invention relates to adjustable height portable tables, and, more particularly, to a portable table which can be easily raised or lowered by using a hydraulic jack.
- 2. Description of Related Art
- Recently there has become a need to have a portable and easily adjustable table which can vary its height. For the reasons discussed below, the table must be extremely stable and, in addition, be free from any type of clutter beneath its supporting surface. Such tables can find use in various environments, such as in offices, restaurants, factories and machine shops. For example, if the table were to be used as a welding fixture to support articles as they are welded together, it would be very important for the table to have all of the above-mentioned features. Therefore, it would be important that the table be portable so that it may be moved to whatever part of the shop that the welding is to be done, the table would have to be extremely stable so that the table does not jostle, for example, when its height is being adjusted, and the table would need to be fairly clear from clutter so that various items, such as tanks for the welding equipment, can be stored underneath the table. Of particular importance, of course, is the ability for the table to adjust its height so that welding personnel can easily access various parts of equipment being worked on. Previously designs of a welding fixture were typically a fixed table which, since it could not be moved from place to place or have its height adjusted, would not be satisfactory.
- Another proposed solution to the problem was to use a certain type of jack to make a welding table adjustable. Such a jack typically was simply removed, for example, from a trailer hitch and placed on a two part table so that when the jack was actuated, the table top would move up and down. This of course suffers from a major drawback in that the jack was so incredibly large that it took up all storage space under the table and tended to be of a clumsy design.
- Yet another proposal to overcome the problems stated in the prior art is represented by U.S. Pat. No. 5,437,236 which discloses a multifunctional table with elevational capabilities. In that patent, there is proposed the use of a hydraulic jack between a base and a table top. This arrangement is considered to suffer two major disadvantages in that, first of all, the table is not portable and may not be easily moved from place to place in a machine shop and, more importantly, the table is not stable. While the patent does recognize its own deficiency in the table not being stable enough and does try to correct the situation by proposing using four telescoping supports as shown in FIG. 13, it is still woefully lacking in any type of frame structure which would provide the necessary support for proper welding work.
- Accordingly, it is desirable to provide a portable, adjustable height table which does not suffer the drawbacks mentioned above and furthermore is easily adjustable in height, readily portable, and lacks any type of clutter below its main support surface.
- The present invention includes a portable, adjustable height load bearing structure or table comprising an adjustable height table, a base frame, a slider frame assembly, a generally planar support surface and a lifting mechanism. The main portion of the base frame is formed by welding three tubular components to form an H-shape. Each of the lower end portions of the H-shape includes a mounting to support a swiveling, locking castor. Above each castor, there extends from the H-shaped main portion, a vertically extending tubular column. The slider frame assembly includes an H-shaped main portion formed of three tubular members. Four vertically extending hollow tubular column members are attached to the H-frame of the slider frame assembly, so that they may telescopingly engage the four vertically extending column members of the base frame. A generally planar support surface is attached to the top of the four vertically extending columns located on the slider frame assembly. Between the central tube of the H portion of the base frame and the central tube of the slider frame assembly, there is located a lifting mechanism, preferably a hydraulic jack. This jack can be actuated by a pedal mechanism to lift the slider frame assembly relative to the base frame. A second pedal is provided in a lifting mechanism to control the jack in order to lower the slider frame assembly at a controlled rate of descent. Additionally, an anti-sway bar is provided to prevent the lifting pump pedal from swaying when in use.
- The foregoing and other novel features and advantages of the invention will be better understood upon reading the following detailed description taken in conjunction with the accompanying drawings in which like reference numerals refer to like parts in each of the figures.
- FIG. 1 is a perspective view of the first embodiment of a table constructed in accordance with the principals of the invention wherein the table is in its lowermost adjustable position.
- FIG. 2 is a perspective view of the table of FIG. 1 in its uppermost position.
- FIG. 3 is an exploded view of a lift mechanism incorporated in the preferred embodiment of the table shown in FIG. 1.
- FIG. 4 is an exploded perspective view of the connection between the sliding frame and the generally planar support surface of a first preferred embodiment of this invention.
- FIG. 5 is a cross-sectional front view of the connection between the sliding frame and the generally planar support surface of a first preferred embodiment of this invention.
- FIG. 6 is an exploded perspective view of the connection between the slider frame and the generally planar support surface of a second embodiment of the invention.
- FIG. 7 is a cross-sectional front view of the connection between the sliding frame and the generally planar support surface of a second embodiment of the invention.
- Although the present invention will be described hereinafter in the context of an adjustable height welding table for use in a machine shop, it will be appreciated that the invention is equally applicable to load bearing structures of many different types used in a variety of different applications. For example, the adjustable table can be used in office environments, restaurants or, for example, as a portable inspection station in a factory environment. Also please note that the terms vertically, horizontally, up, down and the like are used for convenience and simply refer to the table of the preferred embodiment of this invention in its natural upright position as shown in the drawings. These terms are therefore not to be considered limiting.
- Referring to the drawings and initially to FIG. 1, an adjustable height table constructed in accordance with the invention is generally designated by the
reference numeral 10 and includes an H-shaped base frame 12, an H-shapedslider frame assembly 14, alifting mechanism 16 and a generally planar support surface ortabletop 18. As can best be seen in FIGS. 1 and 2, thebase frame 12 includes a first hollow, elongatedtubular member 20 extending along a first axis. A second hollowtubular member 22 extends at right angles thereto and is welded at oneend 24 of firsttubular member 20 and a thirdtubular member 26 also extends at right angles to the firsttubular member 20 and is welded to theother end 28 of the firsttubular member 20. The result is a generally H-shaped base frame 12 having four laterally extending arms. Thesetubular members arms cap caps shaped base frame 12. - The
base frame 12 typically extends in a horizontal plane during normal use. Attached to extreme ends of each of the laterally extendingarms casters castors - At the extremes ends of these
lateral arms tubular posts arms tubular posts castors slider frame assembly 14 as will be discussed more fully below. - Turning now to the
slider frame assembly 14, theslider frame assembly 14 also comprises three hollowtubular members tubular members base frame 12. An initial hollow elongatedtubular member 50 extends generally parallel to the firsthollow tubular member 20 of the H-shapedbase frame 12 and is located just above the initial hollow elongatedtubular member 20. Attached to eachend tubular member 50 are two hollow elongatedtubular members slider frame assembly 14. The twotubular members lateral arms lateral arms tubular column arms arm slider frame assembly 14 are slightly shorter than the laterally extendingarms base frame 12 as best seen in FIGS. 1 and 2. This is to assure that thevertical columns slider frame assembly 12 are positioned so that they may slide telescopingly with the upper ends of the vertically extendingposts base frame 12. - Note that all of the tubular members preferably have a square cross section as shown in the figures. However, any cross section will do, so long as the
slider frame assembly 14 andbase frame 12 may cooperate in a telescoping manner. For example, circular, rectangular, or oblong cross sections, etc. are perfectly acceptable. - The generally planar support surface or
tabletop 18 may be made of several different materials. Two preferable materials are shown in FIGS. 4-7. More specifically, in FIGS. 4 and 5, there are shown a maple block top or other type of wood planar board. In this configuration, an elongatedrectangular insert 100 is placed on the top of thevertical columns assembly 14 and welded thereto. Ahole 102 is formed in therectangular insert 100 to receive ascrew 104 which may be added from underneath thetabletop 18 to secure thetabletop 18 on theslider frame assembly 14. Using this type of connection, no screws or imperfections may be found seen on the top of thewooden block tabletop 18. - Alternatively, in another preferred embodiment as shown in FIGS. 6 and 7, a separate
square fastener 106, having a threadedhole 108 formed therein, may be secured, such as by welding, within thetubular columns slider frame assembly 14. The generally planar surface or tabletop as shown in FIGS. 6 and 7 is made of metal such as aluminum or other materials and has a recessedhole 109 in its top which may easily accept abolt 110 such that thebolt 110 may be screwed through the top of the table 18 and into aninsert 106 located in a respective one of the vertically extendingtubular columns slider frame assembly 14. - In any event, it is important to note that any convenient type of connection between the
slider frame assembly 14 and thetabletop 18 may be used. In fact it is envisioned that these vertically adjustable portablecombination base frame 12/slider frame assemblies 14 may be sold without any top at all so that a customer may provide their own custom made supporting surface. - As best can be seen in FIG. 3, a
lifting mechanism 16 is provided between thebase frame 12 and theslider frame assembly 14. There are several types of lifting mechanisms that may be used, as long as they easily lift theslider frame assembly 14 relative to thebase frame 12 and do not provide for any clutter underneath thetable top 18. There is preferably shown a hydraulic pump actuatedjack 16 as the lifting mechanism. Specifically, thejack 16 is mounted on the firsthollow tubular member 20 of thebase frame 12 by twobolts 70 and extends upwardly to the firstelongated tubular member 50 of theslider frame assembly 14. Thejack 16 is provided with a pair of twopiece pivoting arms elongated members base frame 12 andslider frame assembly 14. With this arrangement, there is much more usable area available under thetable top 18 for various items such as cylinders or other types of welding equipment (not shown). Thepump pedal assembly 80 which activates thepump 82 of thehydraulic jack 16 is located at 90° to the above-mentioned axis. Thus thispedal assembly 80 extends to a convenient location where an operator may pump up the table 18 as desired. Arelease pedal 84 is located adjacent thepump pedal assembly 80 and is provided for controlling the release of hydraulic pressure in thejack 16 and thus the decent rate of the table 10. Anadjustable screw stop 120 is provided to restrict a downward motion of therelease pedal 84. Aspring 122 urges the pedal to its uppermost position so that thehydraulic jack 16 will not cause thetabletop 18 to lower inadvertently. - While the use of a hydraulic jack is known in the art, the particular arrangement of the pumping pedal is not. It is therefore important to note that the pumping pedal, as best seen in FIG. 3, is provided with an
anti-sway bar 90 connected thereto. This bar has three major functions: first, to keep thepump pedal 88 from swaying from side to side by protruding down through a retaining bracket and its twoguide tabs 94, second, to retain the pumppedal return spring 96, and third, to act as a solid stop to the pump pedal return height. At this point it should be realized that the particulars of the working members of thehydraulic jack 16 are not considered novel to this invention and therefore will not be discussed in detail here. Any type of hydraulic, pneumatic or other mechanical jack may be provided so long as it keeps the areas under thetabletop 18 clear and is easily actuated by the table operator. - In operation, all of the
castor wheels horizontal tabletop 18. The portable table 10 can then be easily maneuvered due to the swiveling nature of thecastors castors - Items may either be placed upon the
tabletop 18 or, in the case of ametal tabletop 18 for example, magnetic clamps (not shown) may be used to hold various work items in place. By repetitively pushing the pumpingpedal 88, thehydraulic jack 16 may be actuated to lift theslider frame assembly 14 andtabletop 18 up to a desired height. For example, the table 18 may raise from a lowered position as shown in FIG. 1 to a raised position shown in FIG. 2. When necessary, therelease pedal 84 may be actuated to control how fast thetabletop 18 is lowered and to also set its height at a lower position. The speed of the tabletops decent can be controlled by the amount therelease pedal 84 is depressed by the operators direct control. However, in most cases, the operator will just push thepedal 84 until it reaches a stop point. This stop point itself is adjusted by rotatingscrew stop 120 to a desired position. For example, if the screw stop is rotated so that it rises and thus stops therelease pedal 84 at a higher position, the valve on thehydraulic jack 16 will release pressure slowly and thus thetabletop 18 will descend slowly. Conversely, if thescrew stop 120 is rotated so as to be set at a low position, therelease pedal 18 will travel further before it hits thescrew stop 120 and thus open the hydraulic jacks valve more, resulting in a swift descent of thetabletop 18. As mentioned above, aspring 122 is provided to ensure therelease pedal 84 returns to its uppermost position when the operator is not applying pressure thereto. In this manner, the tabletop is prevented from accidentally descending on its own accord. This easy adjustment of the tabletop height gives the operator an incredible advantage of being able to work on either the front or the back of a workpiece without unnecessary bending or stretching. Due to the nature of thehydraulic jack 16 and its actuators, many items may be stored or placed underneath table 10 during use. - While the invention has been described in connection with the preferred embodiments thereof, it would be apparent to those skilled in the art that many changes and modifications may be made without departing from the spirit and scope of the invention. Furthermore, it should be noted that none of the aforesaid detail description should be considered to limit the scope of the invention.
Claims (19)
1. A portable, adjustable height load bearing structure comprising:
a base frame;
a slider frame assembly mounted on said base frame;
a generally planar support surface mounted on said slider frame assembly; and
a lifting mechanism attached to said base frame, said lifting mechanism having a first actuator usable by an operator to move the slider frame in a first direction, a second actuator usable by the operator to move the slider frame in a second direction.
2. A structure according to claim 1 , wherein said lifting mechanism has a stabilizer attached to said first actuator to prevent the actuator from swaying side to side when it is used.
3. A structure according to claim 1 , wherein said slider frame assembly has an H-shaped main body which connects four vertically extending columns.
4. A structure according to claim 1 , wherein said base frame has an H-shaped main body which connects four vertically extending posts.
5. A structure according to claim 1 , in which the base frame and slider frame assembly are telescopingly engaged.
6. A structure according to claim 1 , wherein said base frame has lockable castors attached thereto whereby said portable adjustable height loading structure may be easily moved from place to place.
7. A structure according to claim 1 , wherein said lifting mechanism is a hydraulic jack.
8. A structure according to claim 7 , wherein said hydraulic jack is actuated by a food pedal pump.
9. A structure according to claim 1 , wherein said stabilizer mechanism includes a bar, two guide tabs and a pump return spring.
10. A structure according to claim 1 , wherein said lifting mechanism includes a foot pedal adapted to control the descent rate of the slider frame.
11. An adjustable height load bearing structure comprising:
a base frame;
a slider frame assembly mounted on said base frame having at least two legs connected by a tubular member;
a generally planar support surface mounted on said slider frame;
a lifting mechanism attached to said base frame for moving said slider frame relative to said base frame.
12. A structure according to claim 1 , wherein said lifting mechanism further comprises a foot pedal which extends outward from said base frame so as to be easily accessible by an operator.
13. A structure according to claim 1 , wherein said slider frame assembly has an H-shaped main body which connects four vertically extending columns.
14. A structure according to claim 1 , wherein said base frame has an H-shaped main body which connects four vertically extending posts.
15. A structure according to claim 11 , in which the base frame and slider frame assembly are telescopingly engaged.
16. A structure according to claim 11 , wherein said lifting mechanism is a hydraulic jack.
17. A structure according to claim 16 , wherein said hydraulic jack is actuated by a food pedal pump.
18. A structure according to claim 1 , wherein said stabilizer mechanism includes a bar, two guide tabs and a pump return spring.
19. A structure according to claim 1 , wherein said lifting mechanism includes a foot pedal adapted to control the descent rate of the slider frame assembly.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/061,300 US20020083871A1 (en) | 1998-11-20 | 2002-02-04 | Vertically adjustable table |
US10/259,488 US6874432B2 (en) | 1998-11-20 | 2002-09-30 | Vertically adjustable table |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10920098P | 1998-11-20 | 1998-11-20 | |
US09/443,357 US6343556B1 (en) | 1998-11-20 | 1999-11-19 | Vertically adjustable table |
US10/061,300 US20020083871A1 (en) | 1998-11-20 | 2002-02-04 | Vertically adjustable table |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/443,357 Continuation US6343556B1 (en) | 1998-11-20 | 1999-11-19 | Vertically adjustable table |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/259,488 Continuation-In-Part US6874432B2 (en) | 1998-11-20 | 2002-09-30 | Vertically adjustable table |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020083871A1 true US20020083871A1 (en) | 2002-07-04 |
Family
ID=26806732
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/443,357 Expired - Lifetime US6343556B1 (en) | 1998-11-20 | 1999-11-19 | Vertically adjustable table |
US10/061,300 Abandoned US20020083871A1 (en) | 1998-11-20 | 2002-02-04 | Vertically adjustable table |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/443,357 Expired - Lifetime US6343556B1 (en) | 1998-11-20 | 1999-11-19 | Vertically adjustable table |
Country Status (1)
Country | Link |
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US (2) | US6343556B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050109251A1 (en) * | 2003-11-25 | 2005-05-26 | Bentschneider Stephen E. | Modular base for industrial tools |
Families Citing this family (22)
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US6874432B2 (en) * | 1998-11-20 | 2005-04-05 | John S. Lanphear | Vertically adjustable table |
US8246059B2 (en) * | 2008-02-29 | 2012-08-21 | Sd3, Llc | Mobile base for a table saw |
US20090174162A1 (en) | 2007-12-21 | 2009-07-09 | Gass Stephen F | Mobile base for a table saw |
US20050045077A1 (en) * | 2003-02-10 | 2005-03-03 | Wieslaw Bober | Motorized lift device |
US20040178306A1 (en) * | 2003-03-14 | 2004-09-16 | Hallberg Edwin A. | Self-stabilizing telescopic leg |
US6926254B1 (en) | 2004-03-04 | 2005-08-09 | Robert Nymann | Jack for heavy objects |
US20060054395A1 (en) * | 2004-08-17 | 2006-03-16 | Horizon Veterinary Services, Inc. | Telescoping motorized lift platform |
US7398738B2 (en) * | 2005-04-14 | 2008-07-15 | Hekman Furniture Company | Workstation with adjustable height work surface |
US7966947B2 (en) * | 2007-05-11 | 2011-06-28 | Earthlite Massage Tables, Inc. | Resting device assembly including a table and a trolley |
US8210109B1 (en) | 2007-11-01 | 2012-07-03 | Thomas Gerret Dewees | Pneumatic adjustable-height table |
US20090250672A1 (en) * | 2008-04-03 | 2009-10-08 | Chi-Ting Lin | Lifting Cart |
US9475514B2 (en) * | 2013-11-11 | 2016-10-25 | Capsa Solutions | Medical carts with touch-sensitive foot panels, and associated apparatuses and methods |
US9661923B2 (en) | 2013-12-31 | 2017-05-30 | John Stephen Lanphear | Table and accessory unit assembly and method of docking accessory unit to table |
US9188278B1 (en) * | 2014-05-16 | 2015-11-17 | Chin-Chu Li | Lifting support structure |
US9937968B2 (en) * | 2015-07-13 | 2018-04-10 | Michael Goren | Stackable vehicle |
US10202141B2 (en) | 2015-07-13 | 2019-02-12 | Hurdler Motors | Vehicle, vehicle drive assembly and vehicle steering assembly |
EP3239536A1 (en) * | 2016-04-25 | 2017-11-01 | KIH-utveckling AB | Furniture lock assembly |
US11684444B2 (en) | 2019-05-02 | 2023-06-27 | Stryker Corporation | Height adjustable kick bucket and height adjustable stand |
US11827262B2 (en) | 2020-01-31 | 2023-11-28 | John Stephen Lanphear | Adjustable height multi shelf cart |
US11925489B1 (en) | 2020-11-20 | 2024-03-12 | Stryker Corporation | Manifold for filtering medical waste being drawn under vacuum into a medical waste collection system and related methods |
WO2023069554A1 (en) * | 2021-10-19 | 2023-04-27 | Rdi (Robaina Design Innovations) Llc | Mobile welding cart with lift, storage, and power options |
US11786647B1 (en) | 2022-01-31 | 2023-10-17 | Stryker Corporation | Medical waste collection systems, manifolds, and related methods |
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1999
- 1999-11-19 US US09/443,357 patent/US6343556B1/en not_active Expired - Lifetime
-
2002
- 2002-02-04 US US10/061,300 patent/US20020083871A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20050109251A1 (en) * | 2003-11-25 | 2005-05-26 | Bentschneider Stephen E. | Modular base for industrial tools |
US7490559B2 (en) | 2003-11-25 | 2009-02-17 | Labor Aiding Systems, Inc. | Modular base for industrial tools |
Also Published As
Publication number | Publication date |
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US6343556B1 (en) | 2002-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |