The seat has a rotary recliner providing for selective pivotal movement of the seat back about an axis between occupiable and frontmost positions, and a dumped position therebetween. The improvement comprises a handle mounted on the back for movement between design and tipping positions, and an intermediate position therebetween; a member mounted on the back for pivotal movement therewith and for relative movement between first and second positions; a ring having a portion for, when the member is at its second position and the back is at its dumped position, engaging the member to arrest frontward pivotal movement thereof; and a first linkage for moving the member between its first and second positions upon movement of the handle between its design and intermediate positions and for controlling the recliner to permit said pivotal movement of the back when the handle is at its tipping position.