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Class Information
Number: 267/165
Name: Spring devices > Bendable along flat surface (e.g., leaf spring) > Bow spring or superposed spring elements > Zigzag or plural
Description: Spring device comprising either (a) the structure of part (b) of the definition of subclass 164 or (b) the unitary spring element bent back upon itself at least twice to provide at least three portions sharing the common bending plane or flexural arc.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8668189 Sine wave spring Mar. 11, 2014
8562075 Energy absorber element Oct. 22, 2013
8540224 Variable amplitude sine wave spring Sep. 24, 2013
8408375 Separator spring for clutch plate separation and stabilization Apr. 2, 2013
8366082 Belleville spring guide system Feb. 5, 2013
7938387 Springing construction for making mattresses and the like May. 10, 2011
7726636 Spring for items of furniture Jun. 1, 2010
7678168 Multiple urethane tuned exhaust damper for vertical exhaust Mar. 16, 2010
7614486 Retention of an actuating spring in a one-way clutch or brake Nov. 10, 2009
7338039 Spring suspension mat Mar. 4, 2008
6595503 Cushioning device with U-shaped strip portions Jul. 22, 2003
6557436 Displacement amplification structure and device May. 6, 2003
6250618 Curved wave shim Jun. 26, 2001
6189875 Positioning device with H-drive having spring coupling between beams Feb. 20, 2001
6170808 Spring core for mattress or cushion Jan. 9, 2001
6145820 Fluid filled dampening mechanism utilizing a fluid having a thick viscosity Nov. 14, 2000
6092262 Non-skid wheel brake mechanism Jul. 25, 2000
6024345 Resin-made spring and a bellows type constant volume pump using the same Feb. 15, 2000
6003538 Drain valve Dec. 21, 1999
5803441 Damper mechanism with undulated ribbon-like spring having means for restricting radial movement of the spring Sep. 8, 1998
5791581 Tape rule blade hook shock absorbers Aug. 11, 1998
5785303 Spring core for mattress or seat cushion Jul. 28, 1998
5747140 Flat upholstered body May. 5, 1998
5562541 Folded flat-spring and device into which the folded flat-spring is incorporated Oct. 8, 1996
5551673 Resin shock absorber Sep. 3, 1996
5540418 Foldbale bed with collapsible sinuous springs Jul. 30, 1996
5531284 Powered wheelchair with a detachable power drive assembly Jul. 2, 1996
5430253 Electrical outlet cover assembly Jul. 4, 1995
5346190 Box spring assembly support spring Sep. 13, 1994
5322267 Damper device, in particular for railroad vehicles Jun. 21, 1994
5253849 Wheel suspension structure with buffering leaf springs Oct. 19, 1993
5197698 Method of mounting and isolating automotive exhaust systems Mar. 30, 1993
5193788 Damping bearing assembly Mar. 16, 1993
5102107 Resilient supports for shock absorbing systems Apr. 7, 1992
5074534 Seat with spring supporting frame Dec. 24, 1991
5065988 Spring for compression and tension, mainly in axial direction Nov. 19, 1991
5013013 Spring assemblies May. 7, 1991
4927124 Spring assemblies May. 22, 1990
4919403 Serpentine strip spring Apr. 24, 1990
4905972 Damped spring Mar. 6, 1990
4852704 Energy absorption and barrier device for automotive vehicles and method for making the same Aug. 1, 1989
4850464 Roller clutch energizing spring with protected pleats Jul. 25, 1989
4832320 Spring assemblies May. 23, 1989
4815663 Trigger type sprayer Mar. 28, 1989
4805885 Sinuous spring Feb. 21, 1989
4793601 Key spring Dec. 27, 1988
4711434 Spring disc Dec. 8, 1987
4689720 Thermal link Aug. 25, 1987
4640499 Hermetic chip carrier compliant soldering pads Feb. 3, 1987
4610334 Luggage frame with flexible reinforcement spring Sep. 9, 1986

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