NZ788483A - Improvements to seats - Google Patents

Abstract

The invention relates to a seat, such as a chair or stool, which comprises a frame including at least one leg, an undercarriage which is configured to receive the leg, and a seat pan. The seat pan is rotatably mounted to the undercarriage, wherein the seat pan is rotatable about an axis of rotation relative to the undercarriage. The undercarriage also includes a recess and a resilient component in the recess, while the seat pan includes a stop located on a bottom surface of the seat pan. On rotation of the seat pan relative to the undercarriage, such as may occur when the person seated leans forward or back, the resilient component is compressed between the undercarriage and the stop. In one embodiment, an axle passes through the axis of rotation and connects the legs, and potentially backrest if present, to the undercarriage. relative to the undercarriage. The undercarriage also includes a recess and a resilient component in the recess, while the seat pan includes a stop located on a bottom surface of the seat pan. On rotation of the seat pan relative to the undercarriage, such as may occur when the person seated leans forward or back, the resilient component is compressed between the undercarriage and the stop. In one embodiment, an axle passes through the axis of rotation and connects the legs, and potentially backrest if present, to the undercarriage.

Description

James & Wells Ref: 506403 IMPROVEMENTS TO SEATS Statement of Corresponding Applications This ation is based on New Zealand Patent Application No. 773287, the entire contents of which are incorporated herein by reference.

Field of Technology The present technology relates to improvements to seats, particularly seats with an articulation ism for the seat pan and/or backrest of the seat.

Background to the Technology Seats are articles on which people sit and are widely used in a variety of applications such as school and other learning environments, or offices and homes. Common types of seats include chairs having a seat pan and backrest, or stools which have only a seat pan. The seat pan (and backrest where applicable) is supported by a frame which bears the weight of the seat pan (and backrest where applicable) and a person sitting on the seat pan.

To improve the t and experience of sitting on a seat, it is common to include an articulation mechanism for at least one of the seat pan and the backrest.

The articulation mechanism facilitates the position and orientation of the seat pan and / or backrest to change with respect to the frame e.g. in response to a ’s movement. lation mechanisms frequently include some form of biasing arrangement to e a force to limit the change in position or orientation, or to provide a restorative force to return the seat pan or the backrest to a neutral position.

James & Wells Ref: 506403 This movement can provide several benefits such as improved comfort, improved circulation, reduction in back pain, and preventing stress from concentrating in one part of the body. In learning nments, particularly for children, a seat having an articulation mechanism can improve concentration and learning outcomes.

However, seats which allow reclining are more complex in construction. They typically have a relatively large part count and can be complex to assemble.

Another common problem with seats is that they are relatively bulky. This increases shipping and storage ements costs due to the space that each seat es. To offset this, it is known to sell or transport seats as a kitset, either partially or fully assembled. However, those kitsets can be difficult to assemble, requiring specialist skills and / or tools.

Object of the Technology It is an object of the technology to provide an ed seat.

Alternatively, it is an object to provide a seat which can be more easily or cheaply transported.

Alternatively, it is an object to provide a seat which optimises use of storage space.

Alternatively, it is an object to provide a seat which is stackable.

Alternatively, it is an object to improve storage on other furniture items e.g. table-tops.

Alternatively, it is an object to provide a seat with a reduced part count compared to other seats. atively, it is an object to e a seat which is easier to assemble than existing seats, and does not require list tools or skills such as welding.

James & Wells Ref: 506403 Alternatively, it is an object to provide a seat which is easy to disassemble.

Alternatively, it is an object to provide a seat which allows parts to be easily replaced.

Alternatively, it is an object to provide a seat which s chances of incorrect assembly.

Alternatively, it is an object to provide a seat whose production can be ted.

Alternatively, it is an object to provide a seat whose production is more easily scalable.

Alternatively, it is an object to provide a seat which is strong.

Alternatively, it is an object to provide a seat which is e.

Alternatively, it is an object to provide a seat with a high strength to weight ratio.

Alternatively, it is an object to provide a seat with a high strength to volume ratio.

Alternatively, it is an object to provide a seat which is safe.

Alternatively, it is an object to provide a seat which is stable in use.

Alternatively, it is an object to provide a seat which has desirable or ed ergonomics.

Alternatively, it is an object to provide a seat with an improved articulation mechanism for a seat pan.

Alternatively, it is an object to provide a seat with an improved articulation mechanism for a backrest.

Alternatively, it is an object to provide a seat having a desired range of motion for the seat pan (and st where applicable).

Alternatively, it is an object of the technology to at least provide the public with a useful choice.

James & Wells Ref: 506403 Summary of the Technology According to one aspect of the present technology, there is provided a seat which comprises at least one leg, a seat pan, and an undercarriage, wherein the at least one leg is attached to the undercarriage, and further wherein the seat pan is rotatably attached to the arriage.

According to one aspect of the technology, there is provided a kitset of parts which can be assembled to form a seat, wherein the kitset ses: at least one leg, an arriage, and a seat pan, n the at least one leg and the undercarriage are configured to be attached to each other, and further wherein the seat pan and the undercarriage are configured to be attached so that in use the seat pan can rotate relative to the undercarriage.

According to another aspect of the technology, there is provided a seat which comprises a seat pan, an undercarriage, and one or more resilient components located between the seat pan and the undercarriage, James & Wells Ref: 506403 wherein the seat pan is rotatable with respect to the undercarriage, and wherein in use rotation of the seat pan with respect to the undercarriage compresses the resilient components between the seat pan and the undercarriage.

According to another aspect of the technology, there is provided a kitset of parts that can be assembled to form a seat, wherein the kitset comprises a seat pan, an undercarriage, and one or more resilient components, wherein when the kitset is assembled the seat pan is rotatable with respect to the undercarriage, and further wherein the resilient element is n the seat pan and the undercarriage. ing to r aspect of the present technology, there is provided a seat which ses a frame including at least one leg that is configured to bear down on a surface, an undercarriage which is configured to receive the leg, a seat pan which is rotatably d to the undercarriage, wherein the seat pan is rotatable about an axis of rotation relative to the undercarriage, and wherein the arriage includes a recess and a ent component in the recess, wherein the seat pan includes a stop located on a bottom surface of the seat pan, and further wherein, on rotation of the seat pan relative to the undercarriage, the resilient component is compressed between the undercarriage and the stop.

James & Wells Ref: 506403 According to another aspect of the technology, there is provided a kitset of parts that can be assembled to form a seat, wherein the kitset comprises a frame including at least one leg that is configured to bear down on a surface, an undercarriage which is configured to e the leg, a seat pan which is rotatably mounted to the undercarriage, wherein the seat pan is rotatable about an axis of on relative to the undercarriage, and wherein the undercarriage includes a recess and a resilient component in the recess, wherein the seat pan includes a stop located on a bottom surface of the seat pan, and further wherein, on rotation of the seat pan ve to the undercarriage, the ent component is compressed between the undercarriage and the stop.

The present specification describes improvements to seats. In preferred embodiments the improvements described herein can be implemented together in a product assembled from a kitset.

However, it should be appreciated that the improvements may be implemented separately of each other, and so the description herein should not be seen as limiting on the scope of the logy.

Throughout the present ication, reference to the term “seat” should be understood as meaning a piece of furniture on which a person can sit.

In an embodiment, the seat may be a chair e.g. which has a backrest and a seat pan and unless ise stated, shall be ed to as such throughout the remainder of the specification. In another embodiment, the seat be a stool which has a seat pan but no (or substantively no) backrest.

James & Wells Ref: 506403 Throughout the present specification, nce to the term “seat pan” should be understood as meaning one or more components that provide(s) a surface on which a person sits.

In an embodiment, the seat pan may be a single ent.

In a preferred embodiment, the seat pan may be made of a mouldable material such as, but not limited to, plastic, metal or reinforced materials.

The seat pan may include a top surface and a bottom surface, and in use a person can sit on the top In preferred embodiments, the present ion may include a frame.

Throughout the present specification, reference to the term “frame” should be understood as meaning a structure to support one or more components of the seat above the ground. The frame bears down onto the ground over which the seat is positioned.

For instance, the frame may include the one or more legs, and the undercarriage. In addition, the frame may include a backrest support (as is discussed in more detail below).

In an embodiment, the frame may include two legs e.g. a pair of legs.

However, in an alternative embodiment, the frame may include a pedestal e.g. a single leg with a plurality of feet attached thereto.

In a preferred embodiment, the leg(s) may be substantially C-shaped e.g. when viewed from a lateral side of the chair. This leg configuration is l of a reverse cantilever chair.

In a ularly preferred embodiment, each ed leg may have a first portion, an upper portion and a middle portion. The first portion may be configured to bear down on a surface on which a seat James & Wells Ref: 506403 rests. The upper portion may be configured to engage with the undercarriage to facilitate attachment of the two components together. The middle portion may be configured to transmit weight from the upper portion to the first n.

In a further preferred embodiment, the first n and the upper portion of each leg may be substantially parallel to each other.

In an alternative embodiment, each leg may be shaped in the form of a continuous loop.

In an alternative embodiment, one or more legs may be constructed by attaching multiple components together.

In an embodiment, the leg(s) may be formed from a mouldable material such as, but not limited to, metal, plastic, graphite-reinforced material or fibre-reinforced material.

In an embodiment, the seat includes a seat pan which is ed to at least a portion of one or more legs.

In a preferred embodiment, the present technology may include an articulation ism.

Throughout the present specification, reference to the term “articulation mechanism” should be understood as meaning an arrangement to facilitate movement of one component of the seat relative to another.

In a preferred embodiment, the articulation mechanism may comprise a seat pan lation mechanism.

The seat pan articulation mechanism is configured to, in use, facilitate rotational movement of the seat pan relative to the undercarriage.

James & Wells Ref: 506403 In a preferred embodiment, the rotational movement of the seat relative to the undercarriage is achieved through an axis of on passing through a portion of the seat pan and the undercarriage.

In a preferred ment, the articulation arrangement may comprise a backrest lation mechanism.

The backrest articulation mechanism is configured to, in use, tate rotational movement of the backrest relative to the backrest support.

In an embodiment, the lower surface of the seat pan may have a fulcrum.

Throughout the present specification, reference to the term “fulcrum” should be understood as g a component around which the seat is configured to rotate.

In an ment, the seat rotates around an axis of rotation which passes through the fulcrum.

In a preferred embodiment, the fulcrum may be so oriented that the axis of rotation is away from the bottom surface of the seat.

In a preferred ment, the fulcrum may have a triangular cross-section with a base and a vertex which are opposite to each other. The base may be configured to lie on the bottom surface of the seat and the vertex configured to point away from the bottom surface.

In an embodiment, the fulcrum and the seat may be configured to be formed together.

In an alternative embodiment, the fulcrum may be attached to the seat.

In an embodiment, one or more axles may be configured to pass through the fulcrum.

James & Wells Ref: 506403 hout the present specification, reference to the term “axle” should be understood as meaning a component which is located along the axis of rotation around which the seat rotates.

In one embodiment, the seat may be configured to rotate around one axle. In an alternative embodiment, the seat may be configured to rotate around a plurality of axles, wherein all the axles lie on a single axis of rotation.

In a red embodiment, the axle(s) pass through the ntially triangular fulcrum near the corner which is farthest from the bottom surface of the seat.

In an embodiment, the one or more axles is / are configured to be attached to the leg(s). In an alternative ment, the one or more axles is / are configured to pass through the leg(s).

In yet another alternative embodiment, the one or more axles is / are configured to not be attached to the leg(s).

In an ment, the one or more axles is / are configured to be attached to the backrest support. In an alternative embodiment, the one or more axles is / are configured to pass through the backrest support.

In yet another ative embodiment, the one or more axles is / are configured to not be attached to the backrest support.

In an embodiment, rotation of the seat is configured to be regulated by one or more resilient components.

Throughout the present specification, reference to the term “resilient component” should be understood as meaning a component which is configured to provide resistive force to rotation of the James & Wells Ref: 506403 seat pan or backrest and which provides a restorative force to return the seat pan or st to a neutral position.

In an embodiment, rotation of the seat pan in a first direction is regulated by a first resilient component.

In a preferred embodiment, the first resilient component is located towards the front of the seat.

In another ment, rotation of the seat pan in a second direction is regulated by a second resilient component.

In a preferred embodiment, the second resilient component is located towards the rear of the seat pan.

In a preferred embodiment, the first resilient component and the second resilient component may have the same modulus of elasticity.

In an alternative embodiment, the first resilient component and the second resilient component may have different moduli of elasticity.

In a preferred embodiment, the modulus of elasticity of the first ent component may be lesser than the modulus of elasticity of the second resilient ent. This provides greater resistance when a person seated in the furniture reclines.

Throughout the present specification, reference to the term carriage” should be understood as meaning a component which is located beneath the seat pan and to which the seat pan is rotatably attached.

In a preferred embodiment, the undercarriage may be ured to be attached to the leg(s).

In an embodiment, the undercarriage may include one or more slots or ls that are each configured to receive a portion of a respective the leg.

James & Wells Ref: 506403 In a particularly preferred embodiment, the undercarriage includes a first slot or channel to receive at least a portion of the first leg and a second slot or channel to receive at least a portion of the second leg.

Preferably in this embodiment, the openings to the first and second slots or channels are at or proximate the portion of the undercarriage corresponding to the rear of the seat pan in use.

In an embodiment, the first leg may be secured to the undercarriage by one or more fasteners e.g. in the first slot. Similarly, the second leg may be secured to the arriage by one or more fasteners e.g. in in the second slot.

In an alternative embodiment, at least one of the leg(s) or the undercarriage may be configured to provide a snap-fit attachment to attach the leg(s) to the undercarriage. For instance, the first leg may be snap-fitted to the first slot and the second leg may be snap-fitted to the second slot. atively, the leg(s) may be inserted in a it ement into the respect first and second slots.

In an embodiment, the undercarriage is structured to receive the resilient component(s). For instance, the undercarriage may include one or more recesses to receive a respective resilient element. In use, rotation of the seat pan compresses the resilient element between a surface of the seat pan and the respective recess. This is discussed in more detail below.

In an embodiment, the undercarriage is structured to e additional accessories or attachments.

Non-limiting examples of such accessories and attachments es a mounting arm for onic devices such as s, arm rests, and storage brackets or baskets or the like.

In an embodiment, the seat may include a backrest.

Throughout the present specification, reference to the term “backrest” should be understood as meaning a set of components to provide t to a person’s back when sitting on the seat.

James & Wells Ref: 506403 In an embodiment, the st may be formed from a mouldable material, such as, but not d to, plastic, metal, reinforced materials, etc.

In a preferred embodiment, the backrest may be a single component.

The backrest includes a front surface and a rear surface. The front surface is conventionally configured to be towards a person seated in the seat.

In an ment, the backrest may e a backrest fulcrum.

Throughout the present specification, reference to the term “backrest fulcrum” should be understood as meaning a component around which the backrest rotates.

In an embodiment, the backrest rotates around an axis of rotation which passes through the backrest fulcrum.

In an embodiment, the backrest fulcrum is located on the rear surface of the backrest.

In a preferred ment, the backrest fulcrum may be located towards a lower end of the backrest.

In another embodiment, the backrest fulcrum may be so oriented that the axis of rotation of the backrest is away from the rear surface of the backrest.

In a preferred embodiment, the backrest fulcrum may have a ular cross-section with a base and a vertex. The base may lie on, or be formed integrally to, the rear surface of the backrest while the vertex may point away from the rear surface.

In a preferred embodiment, the seat may include at least one backrest axle.

James & Wells Ref: 506403 Throughout the present specification, reference to the term “backrest axle” should be understood as meaning a component which provides an axle around which the backrest can rotate in use.

In an embodiment, the backrest fulcrum and the and the backrest may be formed er as a single component.

In an alternative embodiment, the backrest fulcrum may be attached to the backrest.

In an embodiment, one or more backrest axles may pass through the backrest fulcrum.

In a preferred embodiment, the backrest axle(s) pass h the substantially triangular backrest fulcrum near the corner which is farthest from the rear surface of the backrest.

In an embodiment, the one or more backrest axles is/are configured to be attached to a backrest support.

In a preferred embodiment, the seat may include a backrest support.

Throughout the t specification, reference to the term “backrest support” should be understood as meaning a ent that attaches the st to the undercarriage and which in use supports the backrest with respect to the undercarriage.

In an embodiment, the arriage may include one or more backrest support slots or channels that are configured to receive at least a portion of the backrest support.

In an embodiment, the backrest t may be substantially linear or ntially non-linear.

In a preferred embodiment, the backrest support may have a substantially ed portion.

In a preferred embodiment, the backrest support may include two free ends.

James & Wells Ref: 506403 The backrest support may form part of a frame of the seat when attached to the undercarriage.

In another red embodiment, the two free ends may be configured to be received by a respective one of the backrest support slots.

In an embodiment, rotation of the st may be regulated by one or more backrest resilient components.

Throughout the present specification, nce to the term “backrest resilient component” should be understood as meaning a resilient component which is configured to provide resistive force to rotation of the backrest and which provides a restorative force to return the seat pan or backrest to a neutral position.

In an embodiment, the backrest resilient component may be spaced apart from and above the backrest fulcrum.

In a preferred embodiment, the st resilient component may be located close to an upper end of the backrest.

In an embodiment, the seat may r e one or more stops.

Throughout the present specification, nce to the term “stop” should be understood as meaning components that restrict the range of rotation of the seat pan around the axle or the backrest around the backrest axle.

In a preferred embodiment, the seat may include a first stop that restricts the range of rotation of the seat pain in a first direction.

James & Wells Ref: 506403 In another red embodiment, the seat may include a second stop that cts the range of rotation of the seat in a second direction.

In an embodiment, the first resilient component may be configured to be ssed between the first stop and a portion of the undercarriage in use, when a person leans forward.

In a preferred embodiment, the first resilient component may be configured to be compressed between the first stop and a first recess of the undercarriage in use, when a person leans forward.

In another embodiment, the second resilient component may be compressed n the second stop and a portion of the undercarriage in use, when a person reclines backward.

In a preferred embodiment, the second resilient component may be compressed between the second stop and a second recess of the undercarriage in use, when a person reclines rd.

In an embodiment, the stop(s) may be attached to the seat pan.

In a preferred embodiment, the stop(s) may be formed integrally to the seat pan.

In an ment, the backrest may include one or more backrest stop(s) that restrict the range of rotation of the backrest.

In a preferred embodiment, the backrest resilient component may be configured to be compressed between the backrest stop and a rear surface of the backrest.

In an embodiment, the backrest stop(s) may be attached to the backrest.

In a preferred embodiment, the stop(s) may be formed integrally to the backrest.

James & Wells Ref: 506403 Further aspects of the technology, which should be considered in all its novel aspects, will become apparent to those skilled in the art upon reading of the following description which provides at least one example of a practical application of the technology.

Brief Description of the Drawings One or more embodiments of the technology will be described below by way of example only, and without intending to be limiting, with reference to the following gs, in which: Figure 1 is a front view of a chair according to an embodiment of the present technology; Figure 2 is a rear view of a chair according to an embodiment of the present technology; Figure 3 is a front perspective view of a chair according to an embodiment of the t technology; Figure 4 is a rear ctive view of a chair according to an embodiment of the t technology; Figure 5 is another rear perspective view of a chair according to an ment of the present technology; Figure 6 is a side view of a chair according to an embodiment of the present logy; Figure 7 is a top view of a chair according to an embodiment of the present technology; Figure 8 is a bottom view of a chair according to an embodiment of the present technology; Figure 9 is an exploded view of a chair according to an embodiment of the present technology; James & Wells Ref: 506403 Figure 9A is a bottom perspective view of a seat pan according to an embodiment of the present logy; Figure 9B is a top perspective view of an arriage according to an embodiment of the t technology; Figure 9C is a side view of the undercarriage of Figure 9B; Figure 9D is a top cross-sectional view of the undercarriage along section C-C’ shown in Figure 9C; Figure 10 is a partial cross-sectional view along section A-A’ shown in Figure 7; Figure 11 is a perspective cross-sectional view along n A-A’ shown in Figure 7; Figure 12 is a side cross-sectional view along section A-A’ shown in Figure 7; Figure 13 is an exploded view of the components of the chair according to according to an embodiment of the present technology; Figure 14 is a front prospective cross-sectional view along section B-B’ shown in Figure 7; Figure 15 is a cross-sectional view of an articulation mechanism showing a seat pan tilted in a first (reclined) direction according to an embodiment of the present technology; Figure 16 is a cross-sectional view of an articulation mechanism showing a seat pan tilted in second (forward) direction according to an embodiment of the present logy; Figure 17 is a cross-sectional view of an articulation mechanism for a backrest in a neutral on according to an embodiment of the present technology; James & Wells Ref: 506403 Figure 18 is a cross-sectional view of an articulation mechanism showing a st in a tilted position according to an embodiment of the present technology; Figure 19 is a side view of a stool according to an embodiment of the present technology; Figure 20 is a front view of a stool according to an embodiment of the present technology; Figure 21 is a rear view of a stool according to an embodiment of the present technology; Figure 22 is a front perspective view of a stool according to an embodiment of the present technology; Figure 23 is a rear ctive view of a stool ing to an embodiment of the present technology. ed Description of Preferred Embodiments of the Technology Chair Referring first to Figures 1 to 14 which show views of a seat according to an embodiment of the present technology, in the form of a chair 100 and components therefor. In general, the chair 100 includes a seat pan 110, a backrest 150, a frame having legs (122 and 124) and a backrest support 158.

The pair of legs 122, 124 lly have a “C” shaped-profile when viewed from the left hand or right hand side, as is perhaps best rated in Figure 6. Each leg 122, 124 includes a first portion 122F, 124F, a middle portion 122M, 124M, and an upper portion 122S, 124S, which together define the “C” shape for the respective legs 122, 124. This shape is often referred to as a reverse cantilever and permit a degree of flex in response to a loading, such as a person being seated, on the chair.

James & Wells Ref: 506403 The first n 122F, 124F of the respective legs 122, 124 is orientated to in use bear down on ground (not marked in the Figures) on which the chair 100 may be positioned.

The chair 100 includes an undercarriage 130. The undercarriage 130 serves as a structural cross-member for the chair and receives the upper portion 122S, 124S of the respective legs 122, 124. This arrangement is useful since it permits flex, arising from the weight and movement of the person sitting in the chair, due to the configuration of the legs as a reverse cantilever. In this manner, comfort may be increased for the person sitting in the chair. A similar effect may be achieved when the chair uses gassprings or the like.

The rear of the undercarriage 130, which in use is proximate the backrest 150, includes a first leg slot or channel 131A and a second leg slot or channel 131B that are each configured to e a respective one of the upper portions 122S, 124S. This may be in a snap-lock or push-fit arrangement. When the upper ns 122S, 124S are d within the slot or channels 131A, 131B, it adds to the overall structural strength of the undercarriage.

The undercarriage 130 is relatively low profile, with no or minimal projections depending downwards.

This better facilitates stacking multiple chairs on top of each other or on r surface, e.g. a table top. To help se risk of slippage on the surface on which the undercarriage has been placed, all or a portion of the surface of the arriage may include a coating of non-slip material (not shown in Figures). The undercarriage may onally be provided with fittings or structures (not shown in s) that permit the mounting of chair accessories; such accessories could include arm rests or mounting bars for arms, arrangements for holding electronic devices, or even storage brackets or baskets or the like.

James & Wells Ref: 506403 The seat pan 110 is moveably mounted to the undercarriage 130 e.g. it is rotatable relative to the undercarriage 130. This enables the seat pan 110 to tilt forward and backward in use (as is discussed in more detail .

A backrest support 158 is provided to connect the backrest 150 to the undercarriage 130. In the illustrated embodiment, the backrest support 158 has a first end 158A and a second end 158B, which are connected together by a mid-section 158L.

The undercarriage 130 includes a first backrest support slot or channel 131C and a second backrest t slot or channel 131D which are each configured to receive a tive one of the first end 158A and the second end 158B. This may be in a snap-lock or push-fit arrangement. As with the upper portions 122S, 124S of the respective legs 122, 124, once the first end 158A and second end 158B of the backrest is inserted into the undercarriage via the slot or channels 131C, 131D, it contributes to the overall structural strength of the undercarriage.

The backrest 150 has a cavity (indicated generally as 151) which is configured to receive at least a n of the mid-section 158L. A cover plate 160 can be used to ch and hold the mid-section 158L in the cavity 151.

The backrest 150 is moveable with respect to the st support 158 e.g. it can rotate with respect to the backrest support 158 (as is discussed in more detail below).

In use, a person sits on the seat pan 110. Their weight on the seat pan 110 is transferred to the upper portions 122S, 124S and down to the tive first portions 122F, 124F by the tive mid-section 122M, 124M.

The legs 122, 124 are braced together by a brace member 126 e.g. which is attached between the first portions 122F, 124F. The brace member 126 can prevent the legs 122, 124 from splaying outwards James & Wells Ref: 506403 under the force(s) that may be experienced in use. In the illustrated embodiment, the brace member 126 is attached to the first portions 122F, 124F of the legs 122, 124 through ers 127.

The first leg 122 and the second leg 124 are provided with at least one foot each e.g. a forward foot 122A, 124A and a rearward foot 122B, 124B. Each foot 122A, 124A, 122B, 124B is made from a material which has a vely high coefficient of friction e.g. rubber. ore, each foot 122A, 124A, 122B, 124B may assist in preventing or limiting slipping of the chair 100 in use.

The feet 122A, 124A, 122B, 124B may be made from a material that enables a certain amount of slip to allow sliding across the ground on which the chair 100 is positioned. However, the feet 122A, 124A, 122B, 124B may also be made of nylon, rubber, or any other suitable material.

As shown in Figure 9, each foot 122A, 124A, 122B, 124B may include two components for ease of assembly.

Figure 9 shows an exploded view of components of the chair 100.

Referring now to Figures 9A, 9B, 9C and 9D, it will be seen that the seat pan 110 includes a seat m 112, a first stop 114 and a second stop 116 which are all provided on a lower side of the seat pan 110.

The undercarriage 130 includes a fulcrum recess 139 formed on an upper side of the undercarriage, a first recess 137 and a second recess 138, which accommodate the seat m 112, the first stop 114 and the second stop 116 respectively.

In the illustrated embodiment, the seat pan 110, the seat fulcrum 112, the first stop 114 and the second stop 116 are formed together as a single ent e.g. by plastic injection moulding. However, the components of the seat pan 110 could be formed separately and attached together e.g. by plastic welding or fasteners such as screws. Alternatively, certain components may be inserted as snap-lock James & Wells Ref: 506403 structures; e.g. the first stop 114 may be moulded separated and ed into a recess moulded to the lower side of the seat pan in a snap-lock fit.

The undercarriage 130 includes the first recess 137 and the second recess 138. Each of the recesses 137, 138 is configured to receive and support one of a first resilient component 134 and a second resilient component 136 respectively (as shown in exploded view Figure 9).

The first resilient ent 134 is located towards a front of the undercarriage 130, in front of the seat fulcrum 112. The second resilient component 136 is located towards a rear of the undercarriage 130, behind the seat fulcrum 112. It will be understood that the rear of the undercarriage corresponds to the rear of the seat pan 110, being proximate to the backrest 150.

The first resilient component 134 is d between the first stop 114 and the first recess 137 in the undercarriage 130. The second resilient component 136 is d between the second stop 116 and the second recess 138 in the undercarriage 130.

As seen in Figure 9D, the slots or ls 131A, 131B that e the upper portions of the respective legs (not shown in this Figure) extend someway into the undercarriage. This increases the contact between the respective surfaces. Although not shown here, the end of the slots or channels 131A, 131B, proximate the first recess 137 may be provided with protrusions that extend into the ends of the upper portions of the legs and assist in locating them firmly within the arriage. Similarly, the slots or channels 131C, 131D that receive the first end and second ends of the backrest (not shown in this Figure) extend someway into the undercarriage. Again this provides increased contact between the respective contact surfaces of the undercarriage and st.

In an alternative embodiment, shown in Figure 13, the chair 100 includes a third resilient component 134B. The first resilient component 134 and the third resilient component 134B are both located James & Wells Ref: 506403 towards the front of the seat pan 110 but are laterally spaced from each other. The first recess may be provided as two discrete recesses e.g. a first recess 137A to receive the first resilient ent 134 and a second recess 137B to receive the third resilient component 134B, as shown in Figure 13.

The chair 100 may further include at least one seat axle 132 to provide an axle about which the seat pan 110 can rotate. In the embodiment illustrated in Figure 13, the seat pan 110 is configured to rotate about a single axle 132.

As illustrated, in the preferred embodiment of Figure 9, the chair 100 includes two seat axles 132, which are each located on the l (left hand and right hand) sides of the seat pan 110. Both of the seat axles 132 may be configured to lie on a single axis of rotation.

The seat axle(s) 132 extend through a respective aperture 132A in a flange formed in an ide of the seat pan 110, and into a corresponding aperture 132B in the respective seat fulcrum 112.

The seat axle(s) 132, in the embodiment of Figures 9A, 9B and 14 are configured to pass through the undercarriage 130 as well as the legs 122, 124. The axle(s) 132, in this embodiment, serves to retain the upper portions 122S, 124S in the first leg slot 131A and the second leg slot 131B respectively. This is helpful for ease and / or greater automation of manufacture, ease of assembly and for reduction of parts; the seat axle(s) 132 functions as a retention member, locking the legs 122, 124 to the undercarriage 130. As previously noted, the legs 122, 124 contribute to the structural strength and integrity of the undercarriage 130. The axles may also serve as a means for securing additional fittings or structures (not shown in s) that permit the ng of chair accessories, such as arm rests, e components and arms to which electronic s may be ed.

Using the axle(s) 132 as a retention member may simplify manufacture by better facilitating automation of the assembly of the chair. It can also simplify manual assembly, even for relatively unskilled persons, James & Wells Ref: 506403 e.g. school children. The chair 100 can be quickly erected from a stored condition, where the legs 122, 124 and / or st 150 have been removed due to storage constraints. Once the legs 122, 124 are d within the undercarriage 130, they can be locked in place by passing the axle(s) h, and the backrest 150, if present.

In the illustrated embodiment, the undercarriage 130 includes apertures 132C to correspond with the apertures 132B, and apertures 132D to correspond with apertures 132A. The ) 132 are configured to pass through the apertures 132A, 132B, 132C and 132D, and therefore through the legs 122, 124 and the backrest if present. Alternatively, the seat axle(s), in an embodiment not shown in any of the Figures, is / are configured to pass only through the undercarriage 130, but not the legs 122, 124. The apertures designated 132C in Figure 9D, would be in this alternative unillustrated embodiment, would be located above what would be the first leg slot 131A, the second leg slot 131B and the backrest slots 131C, 131D.

In an alternative embodiment (also not shown in any of the Figures), g of the seat may be achieved t an axle e.g. there is no discrete axle component. The seat pan may have a cylindrical protrusion, and the undercarriage may have a socket which is configured to receive the cylindrical protrusion. The seat pan may be configured to rotate with t to the undercarriage via the cylindrical protrusion and socket.

As shown in, for example Figures 9 to 12, a st resilient component 164 is positioned between the mid-section 158L of the backrest support 158 and a surface of the cavity 151 in the backrest 150.

Articulation Mechanism and Range of Motion Referring now to Figures 15 and 16 which show the articulation mechanism for the seat pan 110.

James & Wells Ref: 506403 Forward and backward tilting motion of the seat pan 110 is produced when the seat pan 110 rotates about the seat axles 132 on the seat fulcrum 112.

The first ent component 134 and the second resilient component 136 are initially in a substantially uncompressed state, i.e. the seat pan 110 is in a neutral position.

When the seat pan 110 is tilted forward (e.g. in an anti-clockwise direction when viewed from the lefthand side of the chair 100), the first resilient component 134 is compressed between the first stop 114 and the surface of the undercarriage 130 that partially defines the first recess 137.

The first resilient component 134 provides a ative force to urge the seat pan 110 to rotate towards the non-tilted position (e.g. in clockwise orientation around the seat axles 132 when viewed from the and side of the chair 100).

When the seat pan 110 is tilted backwards (e.g. in a clockwise direction when viewed from the left-hand side of the chair 100), the second resilient component 136 is compressed between the second stop 116 and a surface 140 of the undercarriage 130 which partially defines the second recess 138.

The second resilient ent 136 provides a restorative force, urging the seat pan 110 towards the non-tilted position (e.g. in an lockwise orientation about the seat axle 132 when viewed from the left-hand side of the chair 100).

The degree of restorative force provided may depend on the nature of the resilient components 134, 136. In the illustrated e, the resilient component is a er or tube of an elastomeric material, such as rubber. Persons skilled in the art will appreciate that other polymers or materials with the desired resiliency properties may be used.

James & Wells Ref: 506403 The modulus of elasticity or Shore durometer rating of the resilient components 134, 136 may be selected to achieve the degree of restorative force, and range of movement, ed. For e, the second resilient component 136 may be selected such that it is more resistant to compression than the first resilient ent 134. This makes it more difficult for the person in the chair to recline backwards and lean on the backrest 150.

Referring now to Figures 17 to 19 which show functioning of an articulation mechanism to facilitate movement of the st 150 relative to the backrest support 158.

The articulation mechanism includes a backrest resilient ent 164 which may be a cylinder or tube of an elastomeric material, such as rubber. The modulus of elasticity or Shore durometer rating of the backrest resilient component may be selected to e the degree of restorative force, and range of movement, required. Persons skilled in the art will appreciate that other polymers or materials with the desired resiliency properties may be used.

As illustrated in Figure 18, the backrest resilient component 164 is substantially uncompressed when the backrest 150 is in a neutral orientation.

The backrest 150 may e a backrest fulcrum 152 through which a backrest axle 162 passes. The axle 162 may be ured to be bly attached to the backrest support 158, as shown in Figures 9, 10, 13, 17, 18 and 19.

The backrest 150 and the fulcrum 152 may be formed as a single component, e.g. by plastic injection moulding. In an alternative embodiment (not shown in the Figures), the backrest 150 and the fulcrum 152 may be two te components that are joined by means of fasteners, plastic welding, or a snaplock-type arrangement.

James & Wells Ref: 506403 In yet a further ative embodiment (again not shown in the Figures), the backrest may include a cylindrical projection and the cover plate may include a socket that is configured to receive the cylindrical projection. The backrest may be configured to be rotatably attached with respect to the cover plate h the cylindrical projection and the socket.

In the illustrated embodiments, when a force is exerted on the backrest 150 in a rearward direction, the backrest 150 rotates around the axle 162. In doing so, the backrest resilient component 164 is compressed between the st 150 and the mid-section 158L. This position is shown in Figure 19.

On removal of the rearward force on the backrest 150, the backrest resilient component 164 provides a restorative force to urge the backrest 150 to rotate about the axle 162 and return to the neutral position (as shown in Figure 18).

Stool Referring now to Figures 20 to 24 which show different views of a stool 1000 that includes a seat 1010, an undercarriage 1030, a first leg 1022, a second leg 1024, a brace member 1026 and a foot rest 1028.

The first leg 1022, the second leg 1024, the brace member 1026, and the arriage 1030 together form a frame for the stool 1000.

The frame of the stool 1000 may also include an additional support 1058 h the seat 1010. The additional support 1058 may be ured to be received in slots 1031C and 1031D of the undercarriage 1030. This provides additional structural strength to the undercarriage 1030 of the stool 1000.

The first leg 1022 and the second leg 1024, in the illustrated embodiments are substantially ed when viewed from a lateral side of the stool 1000. The first leg 1022 includes a first portion 1022F, an James & Wells Ref: 506403 upper portion 1022S, a middle portion 1022M and a fourth portion 1022T. Similarly, the second leg 1024 includes a first n 1024F, an upper portion 1024S, a middle portion 1024M and a fourth portion 1024T.

The first portions 1022F, 1024F are configured to contact the ground or floor on which the stool 1000 bears down. The upper portions 1022S, 1024S of the respective legs 1022, 1024 are received by the undercarriage 1030, contributing to the ural strength of the undercarriage 1030.

In use, a person’s weight is transmitted from each upper portion 1022S, 1024S to the respective first ns 1022F, 1024F via the respective middle portions 1022M, 1024M. The brace member 1026 is connected to the middle portions 1022M, 1024M and prevents the legs 1022, 1024 from splaying outwardly. In the illustrated embodiment, the brace member 1026 is attached to the middle ns 1022M, 1024M of the legs 1022, 1024 through fasteners 1027.

The fourth portions 1022T, 1024T extend from the respective first portions 1022F, 1024F. The foot rest 1028 is connected between the fourth ns 1022T, 1024T. The foot rest 1028 allows an elevated surface on which a person sitting on the stool 1000 can rest their feet.

The first leg 1022 and the second leg 1024 are provided with at least one foot each e.g. a forward foot 1022A, 1024A and a rearward foot 1022B, 1024B. Each foot 1022A, 1024A, 1022B, 1024B may be made from a material which has a vely high cient of friction e.g. rubber. Therefore, each foot 1022A, 1024A, 1022B, 1024B may assist in preventing or limiting slipping of the stool 1000 in use.

The undercarriage 1030 and the seat pan 1010 are substantially identical to the undercarriage 130 and seat pan 110 discussed herein. Accordingly, they will not be described again in detail. Instead, like references refer to like components.

James & Wells Ref: 506403 The rotation of the seat pan 1010 with respect to the undercarriage 1030 is substantially identical to that described herein with respect to the seat pan 110 and the undercarriage 130 of Figures 15 and 14.

The stool 1000 has an axle 1032 (or in an example nor shown here, a pair of axles, one for either side of the seat pan 1010) which connects the seat pan to the undercarriage and s an axis of rotation.

The axle(s) also pass through the legs 1022, 1024 and/or the additional support 1058, if t. This holds the seat pan 1010 and legs 1022, 1024 together with the undercarriage 1030, simplifying manufacture and assembly while also reducing part count, since separate ers may not be Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise”, “comprising”, and the like, are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense, that is to say, in the sense of “including, but not d to”.

The entire disclosures of all applications, patents and publications cited above and below, if any, are herein incorporated by reference.

Reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that that prior art forms part of the common general knowledge in the field of endeavour in any country in the world.

The technology may also be said y to consist in the parts, components, characteristics and es referred to or indicated in the specification of the application, individually or collectively, in any or all combinations of two or more of said parts, components, characteristics or features. s of the present technology have been described by way of example only and it should be appreciated that modifications and additions may be made thereto without departing from the scope thereof as defined herein.

James & Wells Ref: 506403 Where in the foregoing ption reference has been made to integers or components having known equivalents thereof, those integers are herein incorporated as if individually set forth.

It should be noted that various changes and modifications to the presently red embodiments described herein will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the spirit and scope of the technology and without diminishing its attendant advantages. It is therefore intended that such s and modifications be included within the present technology.

James & Wells Ref: 506403

Claims (41)

Claims

1. A seat which comprises: a frame including at least one leg that is configured to bear down on a surface; an undercarriage which is configured to receive the leg; a seat pan which is rotatably mounted to the arriage, wherein the seat pan is rotatable about an axis of rotation relative to the undercarriage; and n the undercarriage includes a recess and a resilient component in the recess, wherein the seat pan includes a stop located on a bottom surface of the seat pan, and further wherein, on rotation of the seat pan relative to the undercarriage, the resilient component is compressed between the undercarriage and the stop.

2. The seat according to claim 1, wherein the at least one leg includes a pair of legs.

3. The seat according to either one of claims 1 or 2, wherein the at least one leg is substantially C- shaped.

4. The seat according to any one of claims 1 to 3, wherein the at least one leg includes a first portion which is configured to bear down on a e on which the seat rests.

5. The seat according to any one of claims 1 to 4, wherein the at least one leg includes an upper portion which is configured to be received by the undercarriage.

6. The seat according to claim 5, wherein the first portion and the upper portion are substantially parallel to each other.

7. The seat according to claim 6, wherein the at least one leg es a middle portion which connects the upper n to the first portion.

8. The seat ing to any one of claims 2 to 7, wherein the leg(s) is/are a single component.

9. The seat ing to any one of claims 2 to 7, wherein the leg(s) is/are formed from a plurality of components. James & Wells Ref: 506403

10. The seat according to any one of claims 1 to 9, wherein the leg(s) include(s) a plurality of feet.

11. The seat according to any one of claims 1 to 10, wherein the at least one leg is attached to the undercarriage by a it or push-fit ism.

12. The seat according to any one of claims 1 to 11, wherein the undercarriage includes one or more slots or channels which are each configured to receive at least a portion of a respective leg to facilitate attachment of the leg(s) to the arriage.

13. The seat according to any one of claims 1 to 12, wherein the resilient component is one of at least two resilient components, and wherein the stop is one of at least two stops d on the bottom surface of the seat pan, wherein in use rotation of the seat pan with respect to the undercarriage in a first direction compresses the first ent component between the first stop of the seat pan and the undercarriage, and rotation of the seat pan with respect to the undercarriage in a second direction compresses the second resilient ent between the second stop of the seat pan and the undercarriage.

14. The seat according to claim 13 wherein the first resilient ent is located at or towards a front portion of the undercarriage.

15. The seat according to claim 13 or claim 14, wherein the second resilient component is located at or towards a rear portion of the seat.

16. The seat according to any one of claims 13 to 15, wherein the modulus of elasticity of the first ent component is substantially the same as the modulus of elasticity of the second resilient component.

17. The seat according to any one of claims 13 to 16, wherein the undercarriage includes a recess to receive the second resilient component.

18. The seat according to any one of claims 1 to 17, wherein the seat pan is a single component. James & Wells Ref: 506403

19. The seat according to any one of claims 1 to 18, wherein the seat pan includes a top surface on which a user of the seat sits and a bottom surface which is substantially opposite to the top surface.

20. The seat according to claim 19 when dependent on any one of claims 13 to 17, wherein the resilient component(s) is/are positioned and located to be ssed between the bottom surface of the seat pan and the undercarriage on rotation of the seat pan.

21. The seat according to either one of claims 19 or 20, wherein the bottom surface is ured to define a fulcrum.

22. The seat ing to claim 21, wherein the axis of rotation passes through the fulcrum.

23. The seat according to either one of claims 21 or 22, wherein the fulcrum has a substantially triangular cross-section.

24. The seat according to any one of claims 1 to 23, wherein the seat pan is attached to the undercarriage by an axle passing through at least a portion of the length of the axis of rotation.

25. The seat according to claim 24, wherein the axle passes through the leg.

26. The seat according to any one of claims 1 to 25, wherein the seat r es a backrest.

27. The seat according to claim 26, wherein the backrest further includes a backrest support that is received by the undercarriage.

28. The seat according to claim 27, wherein the axis of rotation passes through the backrest support.

29. The seat according to any one of claims 26 to 28, wherein the backrest is a single component.

30. The seat according to anyone of claims 26 to 29, wherein the backrest r includes a st m located on a rear surface of the backrest.

31. The seat according to claim 30, wherein the backrest fulcrum is located at or towards a lower end of the backrest. James & Wells Ref: 506403

32. The seat according to either one of claims 30 or 31, wherein the backrest fulcrum is structured to have a ntially triangular cross-section.

33. The seat according to any one of claims 27 to claim 32, wherein the backrest is ured rotate with respect to the backrest support.

34. The seat according to any one of claims 27 to 33, wherein the backrest is attached to the backrest support by at least one axle.

35. The seat according to any one of claims 27 to 34, wherein the undercarriage es one or more backrest support slots to receive at least a portion of the backrest support.

36. The seat according to any one of claims 27 to 35, wherein the seat further includes one or more backrest resilient components.

37. The seat according to claim 36, wherein the backrest resilient component(s) is/are located between the backrest and the backrest support.

38. The seat according to either one of claims 36 or 37, n the one or more backrest resilient components are located at or towards an upper end of the backrest.

39. The seat ing to claims 36 to 38, wherein the st includes a backrest stop that restricts rotation of the backrest.

40. The seat according to claim 39, wherein the backrest resilient ent(s) is/are compressed between the rear surface and the backrest stop in use on rotation of the backrest.

41. A kitset for a seat, the kitset comprising: a frame including at least one leg that is configured to bear down on a surface; an undercarriage which is configured to receive the leg; a seat pan which is rotatably mounted to the undercarriage, wherein the seat pan is rotatable about an axis of rotation relative to the undercarriage; and James & Wells Ref: 506403 wherein the undercarriage includes a recess and a ent component in the recess, wherein the seat pan es a stop located on a bottom surface of the seat pan, and further wherein, on rotation of the seat pan relative to the undercarriage, the resilient component is compressed between the undercarriage and the stop