Patent Number: 6,429,551

Title: Oscillating motor

Abstract: Known oscillating motors have inter alia starting difficulties resulting from the fact that the sliding seal ring is subject to pressures applied within said ring, even at a standstill. According to the invention, an oscillating motor is provided, comprising a sliding seal ring capable of axially sliding on a journal (8) of the output shaft (7) and which rests on an internal surface of the cover (4) with a sliding and sealing surface. Annular rings which are located on the cover side of the sliding seal ring (23) are connected through pressure compensation bores (34) and pressure compensation channels (38) to the side of the sliding seal ring (23) oriented towards the pressure chamber (13) or the discharge chamber (14). Static pressure in the housing (27) of the diagonal seal ring (28) and dynamic pressure in the pressure chambers (13) can thus be compensated.

Inventors: Beetz; Stefan (Idar-Oberstein, DE), Reichel; Klaus (Domsuhl, DE)

Assignee: PNP Luftfedersysteme GmbH

International Classification: F01C 21/00 (20060101); H02K 033/00 (); F01C 009/00 ()

Expiration Date: 08/06/2010