Gear pumps and motors

Rotary expansible chamber devices – Trapped fluid relief – With tooth modification

Patent

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F04C 104, F04C 1500

Patent

active

039816460

ABSTRACT:
A gear pump or motor includes a housing having an 8-shaped chamber, a pair of meshed gears in the chamber and a pair of ports opening into the chamber on opposite sides of the zone of mesh of the gears. The teeth of the gears have on their non-working flanks relieved portions adjacent the tip and the root of the tooth which are arranged to leave an unrelieved land across the entire non-working flank.

REFERENCES:
patent: 1686867 (1928-10-01), Kuhn
patent: 1728528 (1929-09-01), Butler
patent: 1728529 (1929-09-01), Butler
patent: 2344628 (1944-03-01), Monahan
patent: 2601003 (1952-06-01), Pontius
patent: 2845031 (1958-07-01), Guibert
patent: 3439625 (1969-04-01), Warne
patent: 3574490 (1971-04-01), Hartmann

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