Abstract: Part of a seat belt, anchored at the top of the seat, adopts a conventional sash/belt arrangement (2a, 2c). The other end of the belt, however, passes under the seat base and protrudes up on the opposite side of the seat base to the above anchorage point. This other end carries a buckle to receive a conventional tongue which slides along the belt. Thus, in use, the belt encircles user's thighs (22) and the seat squab. In an accident a pretensioner activates which tightens the belt, somewhat raising and curling seat squab and user's legs (22), so preventing “submarining” (ie sliding of the user out from under the belt). Alternatively an existing lap/sash belt may be augmented by an extra belt passing from the seat top, across the chest, and around one thigh of the wearer.

Abstract: Part of a seat belt, anchored at the top of the seat, adopts a conventional sash/belt arrangement (2a, 2c). The other end of the belt, however, passes under the seat base and protrudes up on the opposite side of the seat base to the above anchorage point. This other end carries a buckle to receive a conventional tongue which slides along the belt. Thus, in use, the belt encircles user's thighs (22) and the seat squab. In an accident a pretensioner activates which tightens the belt, somewhat raising and curling seat squab and user's legs (22), so preventing “submarining” (ie sliding of the user out from under the belt). Alternatively an existing lap/sash belt may be augmented by an extra belt passing from the seat top, across the chest, and around one thigh of the wearer.