US3656806A - Chair or the like with back and seat foldable in upright position - Google Patents

Chair or the like with back and seat foldable in upright position Download PDF

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Publication number
US3656806A
US3656806A US27524A US3656806DA US3656806A US 3656806 A US3656806 A US 3656806A US 27524 A US27524 A US 27524A US 3656806D A US3656806D A US 3656806DA US 3656806 A US3656806 A US 3656806A
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United States
Prior art keywords
seat
chair
hinge
axis
cam
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Expired - Lifetime
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US27524A
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English (en)
Inventor
Leonida Castelli
Giancarlo Piretti
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Castelli SpA
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Castelli SpA
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    • 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
    • A47C7/56—Parts or details of tipping-up chairs, e.g. of theatre chairs
    • A47C7/563—Parts or details of tipping-up chairs, e.g. of theatre chairs provided with a back-rest moving with the seat

Definitions

  • the chair comprising a support, a seat, first coupling means connecting the support and the seat about a first transverse axis about which the seat rotates, a back, second coupling means connecting the back and seat about a second axis parallel to the first axis permitting the second axis, to rotate thereabout, guide means cooperating with the first and second coupling means rotating the back clockwise about the second axis into a generally vertical position as the seat is rotated counterclockwise from a generally horizontal position into a generally vertical position and rotating the back counterclockwise about the second axis into an inclined position as the seat is rotated clockwise into a generally horizontal position and means limiting rotation of the back and seat as aforesaid.
  • This invention relates to a chair or the like of the type used in public premises, for example, scholastic or university halls, entertainment places and conference halls, in particular in those places where it is foreseen that the user must remain seated for a considerable time and also have available a reading or writing table.
  • the invention provides a chair which permits the person using it to automatically assume an anatomically correct position, which not only reduces fatigue but prevents the formation of bone malformations such a scolioses should the chair be used as a seat for users of school age.
  • the invention permits both the seat and back to be folded into a substantially vertical position permitting the individual to stand up comfortably in front of said chair and to leave or re-enter his place, if necessary, passing in front of other seats in raised positions when the seats are connected in a row, as in scholastic halls and amphitheatres. It is well known that in the case of chairs or seats in which it is foreseen that the user will sit for a long time it is necessary to arrange and conform the back and the seat in such a manner that they adapt themselves to the correct anatomical position for the occupant.
  • the seat is associated with a writing and/or reading shelf it is necessary that the shelf have a predetermined, fixed position with respect to the seat because one tends to have the seats and the writing or reading shelf in a fixed position and the user is automatically obliged to arrange himself in the position most anatomically correct.
  • This principle is already known and is of substantial importance, especially in the construction of seats for pupils of school age, since bone malformations and eye defects may result from the use of unsuitable seats.
  • the invention relates exclusively to a chair, whether or not it is associated with a reading or writing shelf.
  • the present invention provides a chair or the like, which, when occupied, permits the person seated to assume an anatomically correct position, while automatically on raising the seat the plane of the back moves backwards and arranges itself together with the plane of the seat in a vertical position reduced. Further, there are no shelves projecting between the chair and the writing plane or between one chair and another chair in front. Thus, the passageway becomes wider'and not only can one stand up comfortably but also easily pass in front of people who are also standing up in front of their own seats.
  • FIG. 1 is a side view of the side am'is of the seat and back of the chair in the position of use, showing the area of the hinge of the fixed axis partially in section;
  • FIG. 2 is a side view showing the chair wherein the seat and back are vertically positioned to minimize the space they ocp)
  • FIG. 3 is an enlarged longitudinal vertical sectional view taken along line A-A of FIG. 4 showing in 'solid line the side arms of the chair in the occupied position and in broken line the arms in vertical storage position; and
  • FIG. 4 is a transverse sectional view of the side of the chair body taken along line BB of FIG. 3.
  • the chair which is the object of the invention comprises a support for the back formed of two stanchions 1 (one only shown here) and a support for the seat formed from two arms 2.
  • the members l and 2 of each side are coupled together and slide one into the other.
  • the member 2 is coupled to a base piece 5 and is guided in its movement by guide means provided between the member 1 and the piece 5.
  • a back plane 3 is inserted and fixed between the pair of lateral stanchions 1 and is shaped in a manner suitable for matching the shape of the vertebral column of the occupant in the correct seated position.
  • a seat wall 4 is analogously mounted, which is also shaped in such a manner as to embrace and support the posterior parts of the occupant.
  • the walls 3 and 4 are indicated by broken lines and are conventional and not directly related to the invention. It can be seen that as two sides of the chair are independent, they are suitable for the assembly of the back 3 and seat 4 by simple recessing. Screws and other auxiliary fixtures are not necessary.
  • longitudinal grooves la and 2a are formed, respectively, while along the transversal edges of the back 3 and seat 4 flanges 3a and 4a are provided of complementary shape, for inserting into the corresponding grooves la and 2a.
  • the base members 5 are provided for connecting the pairs of members 1 and 2 to a support device.
  • the pieces 5 are inserted by way of a seat 50 formed therein in a cross-piece 6 parallel to the coupling axes, this crosspiece being assembled on legs or fixed supports, which are not shown, and is connected to base members 5 by conventional means. It is obresulting in the bulk of the chair complex being considerably vious that by such a solution, in which at least two chairs are coupled together, a single crossbar 6 can support two or more correctly positioned chairs, the crossbar being supported by at least two stanchions or the like.
  • the seat section 2, 4 is hinged to the pair of base pieces 5, fixed to the crossbar 6 by means of a pair of hinges having their pivots 7 co-axial and in a fixed position, while the back section 1, 3 and the seat section 2, 4 are hinged together by means of a second pair of hinges with co-axial pivots 8, capable of rotating about the axis of the pivots 7.
  • Each arm 2 of the seat is pivoted at 7 to the base part and at 8 to the lower extremity of the stanchion 1, the pivot 8 being placed at a certain distance from the pivot 7 so as to permit the group comprising the seat 2, 4 and the back 1, 3 to rotate around the pivot 7.
  • the parts of the members 1, 2 and 5 near the hinges 7 and 8 are shaped in such a. manner as to constitute cam guide systems.
  • the upper part of the base member 5a is prolonged forward into two lugs 9 perpendicular with the axes 7 and 8, the lateral external edges of these lugs forming respectively the first section 10a of a cam guide surface, the section which has a convex circular profile, co-axial with the pivot 7 and which is connected to the back with a second edge section 10b, of circular concave shape, whose axis of curvature is situated behind the axis 7 and substantially in the same horizontal plane, the axis of the section 10b coinciding with the limiting position of the pivot 8 in the raised position of the seat and back (FIG. 2).
  • the section 10b is connected to a final section 100 of the cam, a section which is convex and of curvature identical to that of the section 10a.
  • a recess 9a is formed in the shape of a segment of a circular annulus.
  • each arm 2 about the hinge with the pivot 8 is prolonged in its turn in the form of two lugs 11, perpendicular to the pivot 8, the lateral edges forming a cam surface which comprises starting from the bottom a first concave section 12a, which mates with the section 10a of the cam formed in the body 5, and a second convex section 12b, of curvature complementary to that of the section 10b, the external extremity of the section 12b being connected to the front surface which borders the zone of connection between the stanchions l and the arms 2, in the utilization position of the chair.
  • Lateral hollow zones are formed in each side of the stanchions 1 in a position corresponding to the pivot axis 8.
  • each cam and starting from the front wall of each stanchion 1 form a guide surface which comprises a first section 13a mating with the section 12b of the cam surface formed along the edges of the lugs 11 of the arm 2, and successively a second section 13b which rests in the utilization position (FIG. 1) of the chair on the back part of the section 10a formed on the edges of the lugs 9 and on raising of the seat 4 slides over section 106 and finally (FIG. 2) comes to rest on the section 100 of said cam.
  • a tongue 14 (FIGS. 3 and 4), partially shaped in the form of a disc, which is prolonged behind the arm 2 below the lugs 11.
  • the lower portion of the tongue 14 has an external profile 14a identical with that of the lugs 9, constituting with this and the pivot 7 the cooperating members of the hinge of fixed axis and providing at the same time a guide means between the member 5 and the arm 2.
  • the hollow area between the two lugs 9 has a circular bottom, so that the part 14a of the tongue 14 can slide on it, this hollow area after a short step 18 being prolonged backwards as a deep longitudinal guide slot 15, whose bottom substantially follows the path of its edges which are shaped like the sections 10b and 10c of the first cam, this slot being provided on its inner side walls with guide grooves 16 parallel to its bottom.
  • a wide tooth 20 projects in the form of a circular ring sector, dimensioned so as to be able to slide in the recess or notch 9a during the relative movement of the seat and back, so as to constitute limit stops in combination with the extremities 21a and 21b of said recess or notch, which define the position of utilization of the chair when the member 20 is in contact with the extremity 21a (FIGS. 1 and 3) and the position of minimum bulk wherein there is contact between the member 20 and the stop 21b as shown in FIG. 2.
  • a tongue projecting wing 17 which projects downwards from'the lower extremity of the stanchion 1, this projecting wing in combination with the lugs 11 forming the hinge body with pivot 8.
  • the projecting wing 17 in turn comprises a circular edge 170 at its lower part which is concentric with the pivot 8 and is designed to slide along a concentric section 140, forming the upper part of the edge of the tongue 14, the edge of which further comprises a back section 141;, slightly inclined forward and hence situated between the section 14a and 140.
  • the projecting wing 17 projects backward in the form of a tail member 27 provided with a front edge 17a which goes with the section 14b of the cam 14 and lies in the guide slot 15 in the open position of the parts (FIGS. 2 and 3), the tail 27 terminating in a roller 19 or other equivalent means mounted on a shaft, the extremities of which are detained and guided by the'grooves 16 of the guide 15.
  • the closed position (FIG. 2) all the parts of the hinge and guide means penetrate each other and fit together, giving rise to an external side profile of the chair in the form of a continuous line, without projecting parts.
  • each of the pivot 8 is inside the corresponding hinge 7, the position of which is fixed and the planes of the seat'and back are substantially vertical, folded one against the other and moved backwards, so as not to project substantially forward beyond the fixed pivot 7-7, giving the unit the position of minimum bulk and leaving in front of the chair a much wider space than possible with conventional chairs having folded seats.
  • This position is further defined by the hold up device, constituted by the corresponding projections 20, which is blocked against the stops 21b.
  • the chair by means of only two pairs of members 1 and 2 and a pair of base pieces 5, in combination with two hinge systems of parallel axes and a suitable cam conformation for guiding the edges of the parts at the junction zone, can be rapidly brought from an inoperative position of minimum bulk to that of utilization, in which the back has an inclined position, rational from the anatomical point of view, while the seat is substantially horizontal. Because of the simplicity of the parts and the means forming the chair of the invention, it is suitable for being produced in a wide range of material and models, and further can be rapidly disassembled and rapidly reassembled which is advantageous from the point of view of storage and transport.
  • a chair comprising:
  • first coupling means connecting said support and said seat for rotation of said seat about a fixed transverse axis
  • second coupling means on said seat connecting said back and seat for rotation of said back relative to said seat about a displaceable axis parallel to said fixed axis and fixed relative to said seat;
  • stop means adjacent said axes for limiting rotation of said seat and back to the aforesaid positions and including a first stop arrangement on said seat and said support for limiting rotation of said seat relative to said support and a second stop arrangement for limiting rotation of said back relative to said seat and said support.
  • a chair comprising;
  • a fixed support including a pair of base pieces
  • a pivotal seat including a pair of lateral seat arms shaped to receive between them a seat wall;
  • first coupling means including a first hinge connecting said support and said seat for rotation of said seat about a fixed transverse axis
  • a pivotal back including a pair of lateral stanchions shaped to receive them a back wall;
  • second coupling means on said seat including a second hinge connecting said back and said seat for rotation of said back relative to said seat about a dispaceable axis parallel to said fixed axis and fixed relative to said seat, one such base piece, one such stanchion, one such seat arm one such first hinge, and one such second hinge constituting a side of said seat;
  • stop means to each side of said seat and adjacent said axes for limiting rotation of said seat and back to the aforesaid positions and including a first stop arrangement on said seat and said support for limiting rotation of said seat relative to said support and a second stop arrangement for limiting rotation of said back relative to said seat.
  • the first hinge comprises hinge members in the form of respective lugs formed on the base pieces and a wing projecting from the back extremity of each seat arm, said hinge members having edges which constitute part of a first section of a first cam and countercam guide system having a cam formed by the edge of the base piece and a counter cam formed by the back extremity of the seat arm, a second cam guide system being provided between said countercam and an edge shaped as a cam formed at the lower extremity of the stanchion on'at least one side thereof, this latter cam having its back part shaped in such a manner as to co-operate with the first cam only at the beginning and at the end of the movement accomplished by the parts for passing from one position to the other while in the intermediate phase it remains separated from it.
  • each arm of the seat is shaped in such a manner as to form two lugs perpendicular to the coupling axes and constituting, in combination with a wing projecting downwardly from the corresponding stanchion, the members of the hinge which form part of the second hinge between the seat and back, the edges of said lugs on said arms in combination with the edges of the base piece and the lower extremity of the stanchion being shaped as guide cam members, adapted to match one another in such a manner as to form a substantially continuous surface in many mutual positions assumed by the parts.
  • each arm being formed with a tail carrying a sliding roller on a shaft, said recess being extended backwards after a small step as a longitudinal guide slot whose bottom has a form substantially parallel to the form of the back part of the first cam, guide grooves being formed in the internal side walls of said slot parallel to the bottom and housing the extremities of the shaft of said sliding roller fixed to said tail which has a form complementary to said slot and which fills it in the closed position of the complex, said tail being prolonged backwards by a projecting part which fonns a member of the second hinge and which constitutes the guide means for making the back carry out its relative rotary movements with respect to the seat, so as to pass from the operative position to the inoperative position and vice versa.

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  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Seats For Vehicles (AREA)
US27524A 1969-05-23 1970-04-13 Chair or the like with back and seat foldable in upright position Expired - Lifetime US3656806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT3733969 1969-05-23

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US3656806A true US3656806A (en) 1972-04-18

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US27524A Expired - Lifetime US3656806A (en) 1969-05-23 1970-04-13 Chair or the like with back and seat foldable in upright position

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US (1) US3656806A (it)
BE (1) BE750008A (it)
CH (1) CH507688A (it)
DE (1) DE2023011B2 (it)
FR (1) FR2048520A1 (it)
GB (1) GB1296128A (it)
NL (1) NL150002B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189876A (en) * 1978-08-07 1980-02-26 American Seating Company Beam-mounted folding chairs
ES2161117A1 (es) * 1998-11-10 2001-11-16 Figuras Internat Seating S A Butaca con respaldo y reposapies abatibles.
EP1530928A1 (fr) * 2003-11-13 2005-05-18 Richard Chene Siége à assise repliable présentant un faible encombrement à l'état replié
US20060119155A1 (en) * 2001-02-23 2006-06-08 Johnson Controls Technology Company Present invention relates to a vehicle seat support mechanism
US20060214488A1 (en) * 2005-03-22 2006-09-28 Philippe Clauss Folding seat having a moving seat proper and a moving seat back
WO2006110717A2 (en) * 2005-04-12 2006-10-19 Irwin Seating Company Modular seating system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9809013A (pt) * 1997-04-30 2000-08-01 Uffe Jensen Móvel de assentar para montagem sobre um elemento de sustentação, e, placa para ser usada como uma placa traseira de um móvel de assentar

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US889578A (en) * 1907-03-01 1908-06-02 John Carrington Brooke Assembly-chair.
US2078373A (en) * 1935-11-09 1937-04-27 John M Dorton Adjustable chair

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US889578A (en) * 1907-03-01 1908-06-02 John Carrington Brooke Assembly-chair.
US2078373A (en) * 1935-11-09 1937-04-27 John M Dorton Adjustable chair

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000358A1 (en) * 1978-08-07 1980-03-06 American Seating Co Beam-mounted folding chairs
US4189876A (en) * 1978-08-07 1980-02-26 American Seating Company Beam-mounted folding chairs
ES2161117A1 (es) * 1998-11-10 2001-11-16 Figuras Internat Seating S A Butaca con respaldo y reposapies abatibles.
US20080174160A1 (en) * 2001-02-23 2008-07-24 Johnson Controls Technology Company Foldable vehicle seat from a use position to a stowed position and related layout of a seat assembly
US20060119155A1 (en) * 2001-02-23 2006-06-08 Johnson Controls Technology Company Present invention relates to a vehicle seat support mechanism
US7815258B2 (en) * 2001-02-23 2010-10-19 Johnson Controls Technology Company Present invention relates to a vehicle seat support mechanism
EP1530928A1 (fr) * 2003-11-13 2005-05-18 Richard Chene Siége à assise repliable présentant un faible encombrement à l'état replié
FR2862194A1 (fr) * 2003-11-13 2005-05-20 Richard Chene Siege a assise repliable presentant un faible encombrement a l'etat replie
US20060214488A1 (en) * 2005-03-22 2006-09-28 Philippe Clauss Folding seat having a moving seat proper and a moving seat back
EP1714582A1 (fr) * 2005-03-22 2006-10-25 Delagrave S.A. Siege pliable a assise et dossier mobiles
US7484804B2 (en) 2005-03-22 2009-02-03 Delagrave S.A. Folding seat having a moving seat proper and a moving seat back
FR2883459A1 (fr) * 2005-03-22 2006-09-29 Delagrave Sa Siege pliable a assise et dossier mobiles
US20060238004A1 (en) * 2005-04-12 2006-10-26 Conner John P Modular seating system
WO2006110717A3 (en) * 2005-04-12 2007-10-25 Irwin Seating Company Modular seating system
WO2006110717A2 (en) * 2005-04-12 2006-10-19 Irwin Seating Company Modular seating system

Also Published As

Publication number Publication date
DE2023011C3 (it) 1978-08-03
GB1296128A (it) 1972-11-15
NL150002B (nl) 1976-07-15
FR2048520A1 (it) 1971-03-19
BE750008A (fr) 1970-10-16
CH507688A (it) 1971-05-31
DE2023011B2 (de) 1977-12-01
NL7004615A (it) 1970-11-25
DE2023011A1 (de) 1970-12-17

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