Seat.

摘要

The invention relates to seat forms, the internal structure of a seat to which the seat owes its shape and to which padding is applied. The seat form (60) has a back portion (61) and a base portion (62). The lengths of the portions are extendable by addition of extension segments (91) and (92). The form may be formed in two halves (61) and (62) interconnected by a plurality of multileaved hinges (63) to allow the angle between the back portion and base portion to be varied. The extension segments (91) and (92) are secured to the previous extension segment or to the basic portion by two segment bolts (68) which have a threaded shaft (70) and a slotted head (69) with a threaded bore (71). The bolts engage a threaded bore (67) in the base or back portion or the threaded bore (71) of the previous segment bolt (68). A pommel (81) is releasably connected to the base portion (62) to improve abduction.