US3858935A — Chair — Luxuse Patents

Claim 1

Independent Claim 298 words

A chair including a seat part and a backrest part, both said seat part and said backrest part being formed from two shell-like mouldings of synthetic plastics material, each shell-like moulding comprising an expansive surface at least partly bounded by a peripheral rim portion, the mouldings being secured together with their rim portions directed towards each other to form a cavity therebetween, the chair further including a pillar arrangement supporting the backrest part from the seat part, and having a generally upright portion extending into the cavity within the backrest part and cooperating directly with the shell-like mouldings of said part to permit sliding adjustment of said backrest part relative to the upright portion in the longitudinal direction of the upright portion, a first adjustment mechanism located and substantially entirely concealed within the cavity in the backrest part, enclosed by the expansive surfaces of the two-shell-like mouldings of said part, and carried directly by the shell-like mouldings of said part, said mechanism being releasably cooperable with said upright portion to lock the backrest part in selected adjusted positions relative to the upright portion, the pillar arrangement also having a generally horizontal portion extending into the cavity within the seat part and cooperating directly with the shell-like mouldings of the seat part to permit sliding adjustment of the horizontal portion relative to the seat part in the longitudinal direction of the horizontal portion, and a second adjustment mechanism located and substantially entirely concealed within the cavity in the seat part, enclosed by the expansive surfaces of the two shell-like mouldings of the seat part, and carried directly by the shell-like mouldings of the seat part, said second adjustment mechanism being releasably cooperable with said horizontal portion to lock the latter in selected adjusted positions relative to the seat part.

Claim 2

Dependent Claim 298 words

A chair including a seat part and a backrest part, both said seat part and said backrest part being formed from two shell-like mouldings of synthetic plastics material, each shell-like moulding comprising an expansive surface at least partly bounded by a peripheral rim portion, the mouldings being secured together with their rim portions directed towards each other to form a cavity therebetween, the chair further including a pillar arrangement supporting the backrest part from the seat part, and having a generally upright portion extending into the cavity within the backrest part and cooperating directly with the shell-like mouldings of said part to permit sliding adjustment of said backrest part relative to the upright portion in the longitudinal direction of the upright portion, a first adjustment mechanism located and substantially entirely concealed within the cavity in the backrest part, enclosed by the expansive surfaces of the two-shell-like mouldings of said part, and carried directly by the shell-like mouldings of said part, said mechanism being releasably cooperable with said upright portion to lock the backrest part in selected adjusted positions relative to the upright portion, the pillar arrangement also having a generally horizontal portion extending into the cavity within the seat part and cooperating directly with the shell-like mouldings of the seat part to permit sliding adjustment of the horizontal portion relative to the seat part in the longitudinal direction of the horizontal portion, and a second adjustment mechanism located and substantially entirely concealed within the cavity in the seat part, enclosed by the expansive surfaces of the two shell-like mouldings of the seat part, and carried directly by the shell-like mouldings of the seat part, said second adjustment mechanism being releasably cooperable with said horizontal portion to lock the latter in selected adjusted positions relative to the seat part.

Claim 3

Dependent Claim 48 words

A chair as claimed in claim 1, wherein the shell-like mouldings of each part are formed within the associated cavity with a plurality of ribs which stiffen the shell-like mouldings, at least some of said ribs slidably supporting, guiding and locating the associated portion of the pillar arrangement.

Claim 4

Dependent Claim 43 words

A chair as claimed in claim 2, wherein the first and second adjustment mechanisms are substantially identical, and each adjustment mechanism is located and supported within its associated part by cooperation with internal members integral with the shell-like mouldings of its associated part.

Claim 5

Dependent Claim 101 words

A chair as claimed in claim 3, wherein each adjustment mechanism includes an element wedgingly cooperable with the pillar arrangement within the cavity in the associated part, to normally lock the pillar arrangement against sliding movement relative to said associated part, the mechanism further including a manually actuable member disposed externally of said associated part and being cooperable with the wedging element upon manual actuation of said member to displace the wedging element to a position in which its wedging action on the pillar arrangement is released, said member being the sole component of the mechanism not concealed within the cavity.

Claim 6

Dependent Claim 136 words

A chair as claimed in claim 4, wherein the pillar arrangement comprises two transversely spaced, generally parallel, tube portions interconnected within the backrest part, the tube portions slidably extending through openings in the rim portion of one moulding of each of the seat and backrest parts and through aligned openings in the wedging element of the associated adjustment mechanism, said wedging element being displaceable, upon manual actuation of said member, from a wedging position in which the plane of each opening in the element is inclined with respect to a transverse plane of the associated tube portion and the edge of the opening wedgingly cooperates with the said tube portion, to a non-wedging position in which the inclination of the plane of said opening with respect to the transverse plane of said tube portion is reduced.

Claim 7

Dependent Claim 90 words

A chair as claimed in claim 5, wherein the wedging element of each adjustment mechanism comprises a pair of rigid plate-like strips, the two strips having inner mutually adjacent ends cooperating with the manually actuable member, and outer ends spaced from said inner ends, each of said outer ends being provided with one of said openings, the strips being mounted within the cavity in the associated part for rocking movement about an axis disposed generally normal to the direction of relative sliding movement between the associated part and tube portions.

Claim 8

Dependent Claim 148 words

A chair as claimed in claim 6, wherein the manually actuable member comprises one end of a push button mounted in the associated part for sliding movement generally parallel to the direction of relative sliding movement between the pillar arrangement and said associated part, the head projecting through an opening in the rim portion of the moulding and disposed centrally between the openings therein which receive the tube portions of the pillar arrangement, and the push button being spring biased towards a position, corresponding to the wedging position of the wedging element, in which the head extends from its opening, and wherein the inner ends of the strips are cooperable within a recess in the push button, each Strip being rockably mounted in a slot in a rib formed within the associated cavity at a position spaced from the inner end of that strip by the opening therein.

Claim 9

Dependent Claim 47 words

A chair as claimed in claim 4, wherein each wedging element is formed from metal, and, when in its wedging position, is operable to positively lock the pillar arrangement against sliding movement in a direction into the associated part whilst permitting sliding movement in the reverse direction.

Claim 10

Dependent Claim 42 words

A chair as claimed in claim 1, wherein the shell-like mouldings of each part are formed within the associated cavity with pairs of parallel opposed ribs which define therebetween longitudinal channels which guide and locate the pillar arrangement relative to the part.

Claim 11

Dependent Claim 80 words

A chair as claimed in claim 1, including armrest parts mounted on tubular pillars, the lower ends of which project generally horizontally into the cavity within the seat part mouldings through a rim portion thereof, each lower end being secured to the uppermost of the seat part mouldings at a position adjacent the rim portion thereof, and to the lowermost of the mouldings at a position spaced along said lower end from the rim portion by the first mentioned position.

Claim 12

Dependent Claim 51 words

A chair as claimed in claim 1, wherein at least the seat part is formed with a peripheral laterally outwardly opening recess, and the seat part is fitted with an upholstery cover including an anchor member which is engageable within the recess to retain the cover secured to the seat part.

Claim 13

Dependent Claim 46 words

A chair as claimed in claim 11 wherein the upholstery cover has a peripheral bead containing an anchor member comprising a helical spring wire loop resiliently and releasably cooperable with the recess, and wherein a layer of padding is located between the cover and seat part.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-01-06	1978-07-08	1979-01-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-01-06	1982-07-08	1983-01-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-01-06	1986-07-08	1987-01-07	$7700.00	Window Closed / Lapsed

Chair

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