Metal working – Method of mechanical manufacture – Spring making
Reexamination Certificate
2011-04-12
2011-04-12
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Spring making
C029S896900, C005S248000, C005S255000, C005S267000, C005S269000, C005S716000, C267S103000
Reexamination Certificate
active
07921561
ABSTRACT:
Disclosed herein is a bedding or seating product (10) having a spring core (12) comprising coil springs (26) having unknotted end turns (72, 74) made from high tensile strength wire. In each embodiment, the end turns (72, 74) of the coil springs (26) are generally U-shaped having one arcuate leg (76) longer than the other (78), the legs (76, 78) being joined by a connector (80) having an arcuate bump (81) therein. The springs (26) are oriented in the spring core (12) such that a long leg (76) of one end turn (72) abuts a short leg (78) of the adjacent end turn (72) prior to be wrapped in helical lacing wire (32). The high tensile wire enables the coil springs (26) to be manufactured using less wire than heretofore possible.
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Eigenmann Guido
Mossbeck Niels S.
Richmond Darrell A.
Bryant David P
L&P Property Management Company
Walters Ryan J
Wood Herron & Evans LLP
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