Eccentric pump and method for operation of said pump

Details Eccentric pump and method for operation of said pump Eccentric pump and method for operation of said pump

2007-03-06

2007-03-06

Koczo, Jr., Michael (Department: 3746)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

C418S064000, C418S220000

Reexamination Certificate

active

10508734

ABSTRACT:
A pump (1) is provided with a housing (2), having an inlet (28) and an outlet (29), a drive (5), a fixed cylinder (2) centered on a mid-axis (9), a displacer (18), rotating eccentrically within the cylinder (2), a crank drive (13) for the displacer (18), a circumferential sickle-shaped pumping chamber (26) between the cylinder (2) and displacer (18) and a helical sealing element (27, 27′, 27″, 39) in the pumping chamber (26). The pump is a dry vacuum pump, whereby the displacer (18) circulates in the cylinder (2) without making contact.

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