Dutch hollow post-mills, invented in the early 15th century, used a two-step gear drive for drainage pumps.
An oval gear drive, which is used in an oil pump with larger pumping volume, is generated by using a rack cutter with circular-arc teeth.
Existence of such envelopes is represented for the cases of cycloidal pumps and conventional worm gear drives.
The cycloidal gear drive is widely used in industrial applications, such as gerotor pump, speed reducer, transmission apparatus and so on.
With group 1 systems it explains that virtually any form of mechanically or electrically driven pump are used, including piston, plunger, multiplunger, gear, vane, and peristaltic.
Pumps may operate off of a direct-drive shaft, a reduction gear drive, a chain and sprocket drive, or a belt drive.
An elliptical gear drive, whose rotation axis coincides with its geometric center, can be used as an oil pump.
An asymmetric spur gear drive is considered.
Sealless pump means a canned-motor pump, diaphragm pump, or magnetic drive pump, as defined in this section.
Magnetic drive pump means a pump where an externally-mounted magnet coupled to the pump motor drives the impeller in the pump casing.
New types of face worm-gear drives are considered.
