Abstract: Can manufacture, particularly the formation of can necks, is improved by modification of necking tooling to stop the rearward travel of the interior of its two coaxial can-deforming members between which can bodies frequently become jammed. The addition of a stop means to the base of the tooling prevents the concurrent travel of the interior member with the outer member due to the frictional engagement of the can body between the two tooling members. With the interior member stationary, the outer member can be driven from the jammed can.

Abstract: A valve for use in applying brake releasing pressure to brake chambers in a vehicle air brake system having reservoirs each containing air for either service or emergency use and having air pressure supply lines. The valve includes a housing. A chamber is formed in the housing. A port permits air communication between the valve and a supply line. A passage interconnects the port and the chamber. Reservoir ports interconnect through the passage. A first plurality of one-way check valves in the passage permit air to pass therethrough from the port to the reservoir ports. A second plurality of one-way check valves in the passage permit air to pass therethrough from the reservoir ports to the chamber.

Abstract: A valve for use in applying brake releasing pressure to brake chambers in a vehicle air brake system having reservoirs each containing air for either service or emergency use and having air pressure supply lines. The valve includes a housing. A chamber is formed in the housing. A port permits air communication between the valve and a supply line. A passage interconnects the port and the chamber. Reservoir ports interconnect through the passage. A first plurality of one-way check valves in the passage permit air to pass therethrough from the port to the reservoir ports. A second plurality of one-way check valves in the passage permit air to pass therethrough from the reservoir ports to the chamber.

Abstract: A pneumatic vehicle spring parking brake pressure holding valve abruptly seals an atmospheric outlet and enables the valving of brake release air pressure to the spring parking brakes when the vehicle reservoir attains a first pressure. Parking brake release is thus enabled. In the case of loss of air pressure from the system, the pressure holding valve retains the brakes fully released until the vehicle reservoir air pressure drops to a second pressure which is lower than the first. The pressure holding valve thereupon abruptly opens its atmospheric outlet thereby rapidly exhausting the air pressure in the spring parking brakes and setting them.

Abstract: A valve for use in applying brake releasing pressure to brake chambers in a vehicle air brake system having reservoirs each containing air for either service or emergency use and having air pressure supply lines. The valve includes a housing. A chamber is formed in the housing. A port permits air communication between the valve and a supply line. A passage interconnects the port and the chamber. Reservoir ports interconnect through the passage. A first plurality of one-way check valves in the passage permit air to pass therethrough from the port to the reservoir ports. A second plurality of one-way check valves in the passage permit air to pass therethrough from the reservoir ports to the chamber.

Abstract: A control valve for selectively establishing connections between the spring applied parking brake in an air braked vehicle and either the parking brake air reservoir or the exhaust port of the control valve, and incorporating a lock which enables the operator to secure the control valve in the position in which the parking brakes are applied.