Pressure-stable cylinder

Details Pressure-stable cylinder Pressure-stable cylinder

2005-04-19

2005-04-19

Brinson, Patrick (Department: 3754)

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

C138S030000, C138S026000, C220S721000

Reexamination Certificate

active

06880578

ABSTRACT:
A pressure-stable cylinder comprises a cover having a dome shape groove and a through hole; an inner wall of the dome shape groove having threads; a cylinder having an opening and an opening section around the opening having a threaded tapered shape matching to the dome shape groove of the cover; the opening section of the cylinder being formed with a plurality of first washers; one end of the opening section having a coupling groove and a second washer; a bellow coupled to the second washer; a disk placed below the bellow; and a compressible spring placed between the disk and a bottom of the cylinder; the compressible spring resisting against the disk so that the cylinder has a predetermined pressure. In assembly, the washer and the bellow are steadily fixed to the coupling groove of the cylinder. The washers have an effect of draining-proof and air-tightness.

REFERENCES:
patent: 4691739 (1987-09-01), Gooden
patent: 4880135 (1989-11-01), Neou
patent: 5425573 (1995-06-01), Mirlocca
patent: 5771936 (1998-06-01), Sasaki et al.
patent: 6363719 (2002-04-01), Mohr et al.
patent: 6478051 (2002-11-01), Drumm et al.
patent: 20040129325 (2004-07-01), Bleeck et al.

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