Abstract: A seat (14), particularly but not exclusively for a wheelchair, comprises a bottom rest (13, 60), a back rest support (18) rotatable relative to the bottom rest about an axis of rotation (100); and a back rest (22) slidably mounted on the back rest support and moveable therealong to vary its position relative to the bottom rest. The back rest is kinematically linked to the bottom rest such that the back rest moves nearer to the axis of rotation as the angle between the back rest support and the bottom rest increases.

Abstract: Apparatus for connecting together two objects comprises: a body for attachment to a first object and having a concave surface and a corresponding convex surface; a clamp for attachment to a second object and having a first jaw and a second jaw moveable relative to the first jaw, the first and second jaws being configured to engage respectively the concave and convex surfaces of the body when applying a clamping force thereto, wherein at least one jaw comprises at least one tooth configured to bite into the body as the clamping force is applied, thereby resisting movement between the body and the clamp. A chair, in particular a wheelchair for disabled persons, has one or more rests mounted on apparatus as detailed above.

Abstract: A seat (14), particularly but not exclusively for a wheelchair, comprises a bottom rest (13, 60), a back rest support (18) rotatable relative to the bottom rest about an axis of rotation (100); and a back rest (22) slidably mounted on the back rest support and moveable therealong to vary its position relative to the bottom rest. The back rest is kinematically linked to the bottom rest such that the back rest moves nearer to the axis of rotation as the angle between the back rest support and the bottom rest increases.

Abstract: Apparatus for releasably coupling an elongate member to a support member, comprising: a first coupling part for attachment to an elongate member; a second coupling part for attachment to a support member, the first and second coupling parts having interengageable profiles; a releasable locking mechanism for locking the first and second coupling parts together to resist relative movement therebetween once their respective profiles are interengaged; wherein the first and second coupling parts and the releasable locking mechanism are configured such that the first coupling part is lockable relative to the second coupling part in one of two predetermined configurations which are angularly spaced about a central axis.

Abstract: Apparatus (30) for attaching an elongate member (18) to a rigid member (20), comprising a first part (40) with a body (42) for attachment to the rigid member (20), the body (42) defining a bore (46) for slidably receiving an end of the elongate member (18), a second part (60) having an aperture—(62) for receiving therethrough an end of the elongate member (18), the first (40) and second (60) parts having mating screw threads (70) for releasably attaching the parts together with the aperture (62) registered with the bore (46), a collet member (50) for engaging the elongate member (18). when received in the bore (46), with at least one part being configured to constrict the collet member (50) as the parts are releasably attached together, and a coupling (80), additional to the mating screw threads (70), for providing a force to resist rotation of one part relative to the other at least when the parts are attached together.

Abstract: Apparatus for connecting together two objects comprises: a body for attachment to a first object and having a concave surface and a corresponding convex surface; a clamp for attachment to a second object and having a first jaw and a second jaw moveable relative to the first jaw, the first and second jaws being configured to engage respectively the concave and convex surfaces of the body when applying a clamping force thereto, wherein at least one jaw comprises at least one tooth configured to bite into the body as the clamping force is applied, thereby resisting movement between the body and the clamp. A chair, in particular a wheelchair for disabled persons, has one or more rests mounted on apparatus as detailed above.

Abstract: A wheelchair (10) comprises a seat member (14) pivotally mounted on support beam (16) of a chassis (12). The chassis (12) includes a pair of spaced-apart side elements (18), each depending from the support beam (16) and having a first part (20) supporting a front ground-engaging wheel (22) and a second part (24) supporting a rear ground-engaging wheel (26). A bracing member (32) extends between the second parts (24) of the side elements (18), and supports a variable length strut (68). The variable length strut (68) extends from the bracing member (32) to rearward part (66) of seat member (14) and controls pivotal movement of seat member (14) around support beam (16).

Abstract: A wheelchair (10) comprises a seat member (14) pivotally mounted on support beam (16) of a chassis (12). The chassis (12) includes a pair of spaced-apart side elements (18), each depending from the support beam (16) and having a first part (20) supporting a front ground-engaging wheel (22) and a second part (24) supporting a rear ground-engaging wheel (26). A bracing member (32) extends between the second parts (24) of the side elements (18), and supports a variable length strut (68). The variable length strut (68) extends from the bracing member (32) to rearward part (66) of seat member (14) and controls pivotal movement of seat member (14) around support beam (16).