143580 ⎘
Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic material, e.g. Moineau type
PARTICLE ADJUSTING DRILLING ASSEMBLY AND METHOD
#2Particle adjusting drilling assembly and method
#3Mud motor or progressive cavity pump with varying pitch and taper
#4Pump housing with dual-purpose inlet fitting
#5Elastomeric stator with modified fiber orientation
#6Hydraulic tools including removable coatings, drilling systems, and methods of making and using hydraulic tools
#7Stator for an eccentric screw pump
#8Progressive cavity pump/motor stator including framework elements and grooves defining chambers
#9System and method for operating a pump
#10Progressive cavity pump with uncoupled natural frequency
#11Helical rotor of a progressing cavity pump
#12Progressing cavity gas pump and progressing cavity gas pumping method
#13Progressive cavity compressor having check valves on the discharge endplate
#14Progressing cavity pump adapted for pumping of compressible fluids