Controlling vacuum level with a two-level vacuum system...
Converter for converting mechanical energy into hydraulic...
Conveying device with peristaltic movement
Coolant system for piston and liner of reciprocating pumps
Cooling air circuit and plate valve improvements for an...
Cooling arrangement for a portable air compressor
Cooling means for a compressor
Cooling means for gas compressors
Cooling structure for compressor
Counterbalanced pumps
Counterbalanced pumps and method of using same
Counterweight for hermetic compressors
Coupling construction of compressor housing and method for...
Coupling for high pressure fluid pump assembly
Coupling guard system
Coupling mechanism for scroll machines
Cradle for removing rod rotator from a pumping oil well
Crank gear for a reciprocating compressor
Crank mechanism for a reciprocating compressor
Cranked rod pump apparatus and method