1. n 104 Recent version of the long stroke reciprocator emulating other types of actuators

2. n 105 Conceptual drawing to illustrate how the DEI reciprocating actuator works

3. n 106 Early prototype Uni-Pump  well-head reciprocating drive unit predominantly manufactured from sheet metal

4. n 107 Early prototype Uni-Pump  well-head reciprocating drive unit predominantly manufactured from sheet metal

5. n 108 Early prototype Uni-Pump  well-head reciprocating drive unit predominantly manufactured from steel RHS tubing and sheet metal.