A single line surface controlled, subsurface safety valve, adapted for connection in a well tubing string. The safety valve has a closure means disposed in the bore of the safety valve housing and is

An equalizing subsurface safety valve for controlling fluid flow in a well conduit has a tubular body member with a longitudinal bore extending therethrough, and a flapper hingably connected within th

A safety valve system includes a safety valve having an actuator and a line connected to the actuator. The safety valve is operable by opening the line in the well, with the line being free of any con

This invention relates to improvements in and relating to a safety valve assembly, especially to be fitted in the hydraulic brake system for wheels of an automotive vehicle, although the invention may

A breakaway safety valve comprising interengageable plug and socket components having a fluid flow passage therethrough, and a plurality of breakaway members holding the plug and socket components in

A tank safety valve which is used to seal off fluid or gas flow from the tank when an accident occurs. If the tank is damaged, such as by accidentally dropping the tank, it is most likely that the val

A safety valve is adapted to fit into the stem of a conventional service valve of a high pressure gas cylinder to prevent the escape of gas when the external part of the service valve is broken off. A

A safety valve and pump apparatus has an electric pump, a safety valve, a packing means, a continuous length of tubing extending from the surface to the location of the safety valve and pump, a contro