Piston machine with ported piston head

Details Piston machine with ported piston head Piston machine with ported piston head

2007-07-10

2007-07-10

Gartenberg, Ehud (Department: 3746)

Pumps

Expansible chamber type

Valved piston

C417S505000, C417S552000

Reexamination Certificate

active

10680992

ABSTRACT:
A piston machine includes a cylindrical wall (2) defining a swept volume (1) and having a plurality of gas inlet openings (5), and a piston (3) reciprocating in the swept volume (1), and the piston head (12) of which is formed as a valve having a plurality of openings (14) provided in the piston head (12), and a forcelocking device (16, 21; 18, 24) for retaining the plurality of openings (14) in one of their open condition and closed condition.

REFERENCES:
patent: 4176586 (1979-12-01), Stoll et al.
patent: 4377090 (1983-03-01), Seulen
patent: 4489754 (1984-12-01), Seessle et al.
patent: 5775886 (1998-07-01), Terwilliger
patent: 6019080 (2000-02-01), LaGrone
patent: 6120266 (2000-09-01), Teck
patent: 6585500 (2003-07-01), Park et al.

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