Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C9/00—Stools for specified purposes
  • A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/02—Seat parts
  • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/02—Seat parts
  • A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions

Definitions

• the present invention relates to an arrangement in a chair, and in particular a work chair for use in offices and workshops .
• Balans® 7.40 Another modern alternative is to provide a chair in which the seat has a saddle like form.
• Balans® 7.40 In this construction the forward corners of the seat are curved downward, and they will therefore not press against the back of the users thighs.
• this chair offers definite advantages.
• Balans® offers a series of seats to its chairs with various degree of curvature, and thus adapted to different ranges of sitting height. Each seat has an optimal sitting height, but will function in a range around this height.
• the present invention has as its first object to provide a chair which permits a more healthy sitting position, which allows an elevated, if necessary almost standing, work position, the user having a proper balance in the upper body with full freedom to breathe.
• Another object of the present invention to provide a chair in which the sitting height can be varied over a relatively great range, while obstructions of blood circulation are avoided at all sitting heights.
• the sitting height should be variable from a normal low height into a next to standing position.
• the advantage of the inventive chair is that the user will experience an improved concentration, due to the higher oxygen content in the blood.
• Fig. la shows the design Balans® 7.40 which currently is produced by the applicant.
• Fig. lb shows a detail of the seat from Fig. la.
• Fig. 2 shows the various seats that can be deliverd with the Balans® 7.40 chair.
• Fig. 3 shows a first embodiment of the new seat, with its regulating mechanism
• Fig. 4 shows another regulating mechanism for the seat
• Fig. 5 shows still another regulating mechanism
• Fig. 6 shows still another regulating mechanism
• Fig. 7 is a sketch showing a possible embodiment of a chair having automatic regulation of the seat
• Fig. 8 shows another embodiment of the automatic regulating mechanism
• Fig. 9 shows two other embodiments of the automatic regulating mechanism
• Fig. 10 shows an embodiment of the chair with automatic regulation of the seat, and with an optional swing mechanism
• Fig. 11 shows still another embodiment of the automatic regulation mechanism
• Fig. 12 depicts a slightly different embodiment of the chair shown in Fig. 11
• the owner of the present invention markets a chair, Balans® 7.40, shown in Fig. la), with a saddle like seat 1.
• the chair comprises a floorstand 5 with wheels 6.
• the chair can of course be delivered without the wheels if desired, and with other types of floorstands .
• the floorstand 5 includes a gaslift cylinder 4 with cylinder rod or mounting rod 3.
• the elevation of the seat 1 can be continuously varied by means of the gaslift cylinder 4, as is well known from current office chairs .
• At the top of the mounting rod 3 there is a mounting bracket 2 holding the saddle like seat 1.
• the seat has a central, more or less flat, part 11 and two flaps or wings 12 and 13 which is turned down from the (horizontal) plane of the central part.
• the angle between the central part and the wings is here called the seat's angle of curvature, or ' curvature for short.
• the hinge line between the flat part 11 and the wings 12, 13 is shown as broken lines 14 and 15. The lines should preferably meet at the front edge of the seat in the point 16.
• This particular seat with its saddle like form has the effect of lessening the pressure against the back of the thighs of a person sitting on the chair.
• the seat is delivered in several different forms, with a curvature of 45, 40, 35 and 15 degree, respectively, as shown in Fig. 2.
• Each curvature is intended for a specific elevation of the chair.
• An important feature of a such seat is that the hinge lines' angle with the front edge, , is made proportional to the curvature. This means that the seat becomes narrower and more pointed in form as the curvature increases, Fig. 2.
• the background for the present invention is that the inventor felt a need for a chair in which the curvature of the seat could be adjusted to suit the chosen elevation. This can be achieved by producing the seat from an elastic material like fibreglass or laminated wood, and distributing the elastic properties of the material in a suitable way.
• the hinge lines 14, 15 position can be kept fixed, and let the seat flex along said lines .
• the degree of curvature can be varied at will .
• Fig. 3 shows a first embodiment of a mechanism for regulating the curvature of the seat.
• Belo a seat made from a suitable flexible material there is mounted a regulation mechanism 30 in the form of two rails or connection rods 30a and 30b, respectively.
• the rails are at the one end tied to the seat in points 34 on the flexible part of the seat.
• the rails are tied together by means of a screw 32 passing trough slots in the rails and fastened to a nut 33. The screw is operated with a wheel 31.
• Each rail is riffled at the face opposing the other rail, to increase the friction between the rails.
• a user has to loosen the screw 32, force the flexible parts of the seat together until the curvature suits the chosen elevation of the seat, and again tighten the screw 32.
• Fig. 4 shows a possible embodiment of the regulation mechanism employing wires between the flexible parts of the seat.
• Fig. 5 shows an embodiment in which the curvature of the seat is regulated by a mechanism with toothed racks.
• Fig. 6 shows a regulation mechanism including a threaded rod 62 fastened to a first flexible part of the seat by a mount 63, a cylinder 61 with threads on the inside, fastened to a second flexible part of the seat by mount 64.
• the curvature of the seat is adjusted by means of the wheel 65 at the side of the seat. By turning the wheel the rod 62 will become screwed into or out off the cylinder 61. The distance between the mounts or fastening point will thus be changed and the curvature of the seat accordingly.
• the chair Preferable the chair should have a self adjusting mechanism, in which the curvature of the seat is automatically regulated as the user changes the elevation of the seat.
• An embodiment of the chair including a such automatic mechanism is shown in Fig. 7.
• the flexible wings of the seat are tied to the floorstand by means of connecting rods or stays 70. When the seat is elevated, the wings will be forced down by the stays, as shown in Fig. 7b.
• the stays includes elastic elements 71. In the figure, these elements are shown as springs; however, they can simply be implemented as stays made of a flexible material, like polypropylene rope. In order not to hamper the swing mechanism of the chair, the stays are fastened to the gaslift cylinder in a swivel mechanism 72.
• Fig. 7 shows an embodiment of the automatic regulation mechanism in which each stay passes through a single block 82. This leads to a linear relationship between elevation and curvature, and in addition the regulation mechanism becomes less obtrusive.
• Fig. 9 shows the introduction of still another set of blocks, to give another, non-linear, relationship between seat elevation and seat curvature. That is, the curvature of the seat should change slower than the change in seat elevation .
• Fig. 10 shows an embodiment of the chair with a more hidden regulation mechanism.
• the chair includes a floorstand 106, on which is mounted a gaslift cylinder 101, a mounting rod 105 supporting a seat 100 with variable curvature.
• On said gaslift cylinder 101 there is turnable mounted a adjustment cylinder 102, which is fastened to the wings by solid stays 103, 104.
• the cylinder 102 and stays 103, 104 will hold or force down the flexible wings of the seat.
• Fig. 11 shows a slightly different embodiment, with a telescopic (duplo) gaslift cylinder 111, 112, 113.
• the relationship between the forces acted upon the central part of the seat and its wings, is determined by the relative area of each piston.
• Fig. 12 shows an embodiment of the chair shown in Fig. 8, in which the chair' s swing mechanism is implemented as a gas cylinder turnable mounted in the floorstand. In this way a separate swivel mechanism can be avoided.

Landscapes

• Seats For Vehicles (AREA)
• Valve-Gear Or Valve Arrangements (AREA)
• Chairs Characterized By Structure (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19911413

Family Applications (1)

Country Status (3)

Cited By (5)

Families Citing this family (1)

Citations (5)

• 2000
  • 2000-07-21 NO NO20003763A patent/NO312876B1/no not_active IP Right Cessation
• 2001
  • 2001-07-20 AU AU2001280276A patent/AU2001280276A1/en not_active Abandoned
  • 2001-07-20 WO PCT/NO2001/000315 patent/WO2002007567A1/en active Application Filing

Patent Citations (5)

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