A side support device for use in a seat back or a seat cushion of an automotive seat is disclosed. In the side support device, two sub-panels or support panels are provided respectively in the insides of the two side portions of a seat frame, the respective inner ends of the sub-panels or support panels are engaged with the associated portions of a pad receiving member extended between the two sides of the seat frame, and the respective outer ends thereof are connected via connecting links to an operation member, whereby by means of operation of the operation lever the side support device can be adjusted so as to support an occupant uniformly from his or her side portions through his or her central or back portions.

A side support device in a seat back of an automotive seat, which is mounted at one lateral frame section of a seat back frame within the seat back, is of such a structure that a motor and associated transmissions are disposed adjacently along the inward side of that one lateral frame section of seat back frame, and that a drive mechanism is also disposed along the same one lateral frame section of seat back frame for causing a pair of side support frames to be moved inwardly toward and outwardly away from each other. The drive mechanism includes a lead screw and a nut member in threaded engagement therewith, such that both of them are disposed vertically relative to the seat back frame. Thus, the motor, drive mechanism and related elements are located in the seat back at a point free from contact with the body of a passenger on the seat.

The seat cushion and/or the backrest of the seat comprising an elastic layer (4) carried by a frame and provided with two lateral projecting wings (8) in which an inverted U-shaped driving rod (14) is connected to the upper part of one of the wings and is pivotally mounted relative to the frame (2). This rod is extended at one of its ends by a connecting lever bent around the frame element and connected to a control cable controlling its pivoting fixed to the door (38) of the vehicle. In this way, this door exerts a pull on the cable which causes the rod (14) to pivot and thereby turns the wing (8) outwardly and clears the access to the seat.

The present invention relates to a motorcycle seat including a single seat or a double seat provided with a side support portion in each of both right and left sides which is adjustably constructed the distance between an operator's or a passenger's waist sides and the side support portions. It can easily adjust the supporting pressure to their waist sides and therefore, such an arrangement can realize any suitable space adjustment to accommodate the difference from the operator's or the passenger's size.

A seat construction having a back composed of a pair of side pads which are spaced apart to provide a cavity therebetween. The cavity is adapted to receive a cylinder for a self-contained breathing apparatus which is strapped on the back of a fire fighter who is seated on the seat. The rear of the cavity is enclosed by a generally U-shaped closure and a head pad connects the upper ends of the side pads and can be pivoted from a head supporting position to a release position. As the fire fighter rises from the set, the cylinder which is strapped to his back will engage the head pad, pivoting it to a release position, so that the cylinder will not catch on the head pad as the fire fighter rises from the seat.