Classifications

• • 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
  • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
  • A47C3/02—Rocking chairs
  • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
  • A47C3/0252—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame connected only by an elastic member positioned between seat and base frame
• • 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
  • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
  • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
  • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
  • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal

Definitions

• the invention relates to a chair comprising a framework for supporting an adjustable seat.
• the object of the invention is to remove this difficulty and to that end provides for, that the seat is supported by at least three, substantially vertically directed supporting members of a resilient material, in such a way that the seat can rotate around an almost horizontal axis, at least two of said three supporting members being mounted on two radially opposite locations of a disc rotatable around a vertical axis intersecting said horizontal axis.
• the seat By supporting the seat by means of the supporting members of resilient material, the seat will always be pushed towards the almost horizontal position.
• the vertical axes of all supporting members are in one plane, in which the tilting axis of the seat lies as well, the resistance against tilting of the seat will be the lowest.
• the disc, mounting two supporting members is rotated, the resistance against tilting of the seat will increase, until the plane in which the two supporting members are situated, will be transverse to the tilting axis of the seat .
• Such a support of the seat will allow for more movement in the lower back of the user, which promotes the health of the spinal column.
• the seat of the chair can be tilted and this tilting can be compensated for in the lumbal spinal column .
• the disc mounting two supporting members will be mounted near the back of the seat and the third supporting member may be located near the front of the seat .
• the resiliency against tilting of the seat can, within certain limits, be adjusted as desired, by rotating the disc .
• fig. 1 illustrates schematically a lateral view of a portion of a chair in which the invention has been embodied
• fig. 2A illustrates schematically the maximum stroke of the seat when it is supported by three, or four supporting members of a resilient material, all being aligned
• fig. 2B illustrates the maximum stroke of the seat when the rotating disc or discs being provided with two supporting members has or have been rotated across approximately 45°
• fig. 2C illustrates the maximum stroke of the seat when the rotating disc or discs has or have been rotated across 90°
• fig. 3 illustrates schematically the application of one single rotating disc
• fig. 4 illustrates the application of two rotating discs .
• the chair illustrated in figure 1 comprises a framework consisting of one central leg 2 bearing on the ground through side legs not further illustrated. These side legs can be provided with wheels in the known way.
• Leg 2 supports a mounting plate 3 to which a back rest 4, illustrated in figure 2, can be connected.
• Leg 2 can be embodied in such a way, that the mounting plate is vertical- Iy adjustable, as this is the case with known chairs.
• Rotating disc 8 is constituted by two plates 9 connected to one another through two supporting members 10 of a resilient material. Rotating disc 8 is rotatable around axis 11.
• the supporting plates can be connected to the mounting plate 3 and the seat 5 by means of screws or glueing or the like. According to an alternative embodiment, not further illustrated, said two supporting plates 7 can also be directly connected to one another through one single, centrally mounted supporting member 10 of resilient material.
• Figure 3 illustrates schematically the support of seat 5 by means of one supporting member 10 fixedly connected to the plates 7 and by means of a rotating disc 8 provided with two supporting members 10.
• Figure 4 illustrates schematically the support of the seat 5 by means of two rotating discs 8, each provided with two supporting members 10.
• Figure 2A indicates, that the seat 5 can experience a certain tilt when the arrangement of the supporting members shown therein is employed.
• the outermost positions of the seat 5 have been indicated by dash lines.
• the suppor- ting members 10 are aligned 12, to wit in a plane extending through the tilting axis 13 of seat 5. The resistance against tilting of the seat 5 will then be minimal .
• Figure 2B illustrates the situation in which the rotating discs 8 have been rotated across an angle of approxim- ately 45°. The resistance against tilting of the seat 5 will then be greater than with the position of the rotating disc according to figure 2A.
• the supporting members 10 or the rotating discs 8 can be connected to a common supporting plate 7. This can facilitate mounting of the various supporting members .
• means not further illustrated for operating the rotating discs 8 can be provided.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Mechanical Engineering (AREA)
• Chairs Characterized By Structure (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

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Family Applications (1)

Country Status (2)

Families Citing this family (1)

Citations (4)

• 2006
  • 2006-05-11 NL NL1031798A patent/NL1031798C2/nl not_active IP Right Cessation
• 2007
  • 2007-04-26 WO PCT/NL2007/000109 patent/WO2007133064A2/en active Application Filing

Patent Citations (4)

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