Spring
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Jun 25, 1998
filing date -
Jun 27, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a spring formed from a synthetic resin into one body, including: a plurality of annular members arranged in such a manner as to be coaxial with each other and spaced in parallel to each other; and elastic linkage members for linking the annular members to each other at a plurality of points. In the spring, each of the elastic linkage members is arranged along a virtual cylindrical face formed by the annular members and formed into a lying U-shape curved in the peripheral direction of the annular members; radii of adjacent ones of the annular members are different from each other; and one end portion and the other end portion of each of the elastic linkage members, which portions are respectively linked to the adjacent ones of the annular members, are not overlapped to each other in the axial direction. These springs are locked integrally with a pair of upper and lower network plane members, which members include over the surfaces thereof locking members for locking upper and lower ends of the springs respectively, in such a manner as to be held therebetween, to form a spring assembly for a mattress.
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