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
  • A47B9/02—Tables with tops of variable height with balancing device, e.g. by springs, by weight
• • 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
  • A47B2200/00—General construction of tables or desks
  • A47B2200/0035—Tables or desks with features relating to adjustability or folding
  • A47B2200/004—Top adjustment
  • A47B2200/0041—Height adjustable table top with parallel link arms

Definitions

• the present invention relates to a vertically adjustable desktop, preferably a school desk, which can be adjusted in a required vertical position by a simple manipulation and by a small adjusting force, at the same time to a great extend eliminating the risk for unintended or not permitted adjust ⁇ ment.
• SE-A-937 As early as 1887 an adjustable desk was patented - see the SE-A-937.
• the problem solved regarded a possiblity to a vertically adjustment of a desktop and a bench dependent upon the size and the age of a child. This is also the case in SE- A-90.219 disclosing av desk being vertically adjustable by a complex gabel mechanism.
• SE-A-110.686 discloses a combination of a seat and a desk, and wherein a complicated handling is involved in adjusting the bench and the desktop.
• SE-A-20.872, SE-A-117.294 and SE-A-184.113 all disclose more or less complex mechanisms and devices to adjust the combination desk/seat.
• SE-B-8107530-1 discloses a balancing device at a table, preferably a drawing table, where the object is to eliminate the difficulties in adjusting the table to equilibrate the load on the table, which load can be about 15 - 60 kp.
• the object according to the present invention is to obtain a desk, preferably a desk for use at school, wherein a vertical adjustment can be performed infinitely with a simple manipulation and with a small adjusing force, whereby the risk for unintended or not permitted adjustement, e.g. when a person is sitting upon the desk, is eliminated.
• the gas spring means will carry the weight of the desk (accumulating the potential energy of the desktop) during all vertical adjustment positions of the desk, wherein the rod piston of the gas spring means will remain locked unless a valve means in the gas spring means is actuated in connection to the adjustment, which takes place by adjusting handles in close connection to the desktop.
• two adjusting handles are arranged in connection to each of the gas spring means at the underbody of the desk and at the parallell linkage, i.e. two hands have to be used to adjust the vertical position of the desk.
• Fig. 1 is a schematic side view - with some portions omitted to make the functions clear - of a desk i a lowered working position.
• Fig. 2 illustrates the desk according to fig. 1 in a middle position
• Fig. 3 illustrates a desk according to fig. 1 i the highest position, wherein the desktop is shown in a first folded position.
• the desk is shown with a desktop 1, a lower stationary stand 2, a linkage 3 (of which just one half is shown in the figures), attachement points 4 and 5 at the stand 2 and at the underbody 6 of the desk, respectively.
• the desk has a square desktop 1.
• the stationary stand 2 has a cross bar (not shown) a distance up on its vertical portion.
• the underbody 6 also includes a cross bar (not shown) .
• the one end of the gas spring means 7 is articulated connetcted.
• the movable pistons in this gas spring means are lockable or blockable through a valve and actuable by a handle 8 actuating the valve when a vertical adjustment of the desk top 1 shall take place.
• the gas spring means 7 allows a change in the vertical position of the desktop 1, whereby in the lower position shown in fig. 1 the gas spring is "charged” with the energy corresponding to the potential energy between the highest adjusting position (fig. 3) and the lowest adjusting position (fig. 1) .
• the energy is released from the gas spring means 7 performing a lifting force via the piston rod and the lever being formed at the upper link in the linkage 3 during a vertical adjustment upwards, and which essentially corresponds to the weights of the desktop 1 and of the underbody 6.
• the latter is preferably connetced in a closed U-grider.
• Yet another advantage with the present invention is obatined if the desktop is so arranged that it cannot be adjusted in a vertical direction when a certain excessive pressure exists i the gas spring means. This is done to eliminate the risk that the desktop unatentionally is adjusted downwards when a person is sitting on the desktop, or when the desk by some other reason is overloaded. The risk for this to happen is imminent when the desks are used at school.

Landscapes

• Tables And Desks Characterized By Structural Shape (AREA)
• Respiratory Apparatuses And Protective Means (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20380887

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (54)

Citations (4)

Family Cites Families (8)

• 1990
  • 1990-11-13 SE SE9003607A patent/SE9003607L/sv not_active Application Discontinuation
• 1991
  • 1991-11-13 US US08/050,318 patent/US5823120A/en not_active Expired - Fee Related
  • 1991-11-13 WO PCT/SE1991/000770 patent/WO1992008392A1/en not_active Application Discontinuation
  • 1991-11-13 EP EP91920215A patent/EP0557372A1/en not_active Withdrawn
  • 1991-11-13 AU AU89586/91A patent/AU8958691A/en not_active Abandoned

Patent Citations (4)

Also Published As

Similar Documents

Legal Events