Bellows tube
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 17, 2001
Grant Date -
N/A
app pub date -
Feb 28, 2000
filing date -
Mar 4, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is directed to a bellows tube formed of metal having a cylindrical collar portion and a plurality of corrugations adjacent thereto with outwardly curved portions and inwardly curved portions alternately formed along the longitudinal axis of the tube. The bellows tube includes a bulged end portion which extends from a first outwardly curved portion of the outwardly curved portions toward the collar portion. The bulged end portion is bulged outward of the tube, with its outer diameter gradually reduced from the first outwardly curved portion to the collar portion. A connecting end portion is formed for connecting the bulged end portion with the collar portion, and the connecting end portion is curved inward of the tube. Preferably, the radius of curvature of the connecting end portion is smaller than the radius of curvature of the first outwardly curved end portion.
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