Automatic plunger for coolant feed

摘要

An automatic plunger for coolant feed consists of a main body 4 with internal moving piston(s) 2 with suitable elastomers fitted where a seal is required to avoid leakage and therefore loss of pressure. The piston 2 is moved by an external force so that it locates onto a surface and pressure is maintained in order that liquid can be forced through the centre of the piston 2 to deliver this same liquid to the point of interface. The piston 2, which is fitted with a spring 9, returns to the start position when the external force is released. This plunger could be used for instance on machine tools where high pressure coolant is required to be delivered through a cutting tool and would operate automatically through the machine control functions thereby eliminating the need for physically changing hose connections.