Abstract: A novel interconnection of the jaw, wedge and operating handle in a fifth wheel facilitates the provision of a secondary locking mechanism which further insures the security of the system. In the invention, the jaw is connected to the operating handle by a pivoting timing lever which pivots off a pin on the jaw such that the jaw remains engaged with the fifth wheel until the wedge is substantially removed from engagement with the jaw. In cooperation with the primary locking mechanism, a secondary lock is provided at the end of the operating handle such that a pin arrangement engages a stop on the fifth wheel assembly until positively released by the operator.

Abstract: A interconnection of the jaw, wedge and operating handle in a fifth wheel facilitates the provision of an indicator on a secondary locking mechanism which further insures the security of the system. In the invention, the jaw is connected to the operating handle by a pivoting timing lever which pivots off a pin on the jaw such that the jaw remains engaged with the fifth wheel until the wedge is substantially removed from engagement with the jaw. In cooperation with the primary locking mechanism, a secondary lock is provided at the end of the operating handle such that a pawl arrangement engages a stop on the fifth wheel assembly until positively released by the operator. The pawl arrangement further has a mechanical indicator which extends beyond the fifth wheel assembly and allows the operator to determine whether the king pin is engaged and the secondary lock is activated.

Abstract: An over-the-highway truck or tractor vehicle having an elongate rail forming a portion of a vehicle frame and an improved battery box in the form of a unitary molded container defining multiple sides of a battery retention space. One of the sides is a base for supporting at least one battery. The container includes a moveable closure which together with the base defines the battery retention space. The enclosure allows access to a battery supported by the container for battery placement in and removal from the battery retention space. Structure including a lower step fixedly connected to the rail supports the container. Pairs of recesses are integrally molded in the base of the container. Air tanks are partially positioned in the recess in a container reinforcing relationship. Connection structure fixes the air tanks and the container together.