Supply and exhaust pipe

Details Supply and exhaust pipe Supply and exhaust pipe

2008-03-25

2008-03-25

Brinson, Patrick F. (Department: 3754)

Pipes and tubular conduits

Combined

With end structure

C138S155000, C285S424000, C285S332200, C285S332300, C277S616000

Reexamination Certificate

active

11152534

ABSTRACT:
In order to provide a supply and exhaust pipe comprising a drop-off prevention mechanism, particularly effective for pipes with a large diameter, to increase bending strength and sealing efficiency, formation of a hemmed section A at an top edge of an insert portion4can eliminate the occurrence of buckling and increase bending strength. Furthermore, an O-ring for sealing can improve sealing efficiency and also can make itself follow a deformation of the pipe by forming it into a mushroom shape to establish close contacts to the pipe at two points, namely a neck8band a part of the circumference8cof a cap8a. Furthermore, a drop-off prevention mechanism of the pipe has a wide sliding piece12, and an arc17with a curvature adapted to the curvature of the pipe is formed on the lower surface of the sliding piece12, to stabilize its sliding.

REFERENCES:
patent: 1554881 (1925-09-01), Reimann
patent: 1824499 (1931-09-01), Reichenbecher
patent: 4050703 (1977-09-01), Tuvesson et al.
patent: 4874191 (1989-10-01), Green
patent: 5473815 (1995-12-01), Sonden et al.
patent: 5531460 (1996-07-01), Stefansson et al.
patent: 6431609 (2002-08-01), Andersson
patent: 10-26342 (1998-01-01), None
patent: 2000-161570 (2000-06-01), None
patent: 3163008 (2001-02-01), None

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