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US 2014/0191454 A1Published application
Telescoping spring assembly for mattresses and the like
AssigneeOtis Bed Manufacturing Company, Inc.
InventorJohn K. Roma
Life of this patent
Estimating the term…
Abstract
A spring assembly includes telescopically adjustable inner and outer members biased in an extension direction by a coil spring. A preload member is provided to apply a compression preload to the coil spring. The preload member can eliminate stickiness and the popping sound that are drawbacks of the prior art, and the fabric sleeve also provides general noise reduction when the spring assembly changes length.
Claims20
A spring assembly, comprising:
- a tubular outer member including a support end and an open receiving end opposite the support end;
- an inner member including an insertion end and a mounting end opposite the insertion end, wherein the insertion end is received by the outer member through the open receiving end of the outer member, the outer member being telescopically movable relative to the inner member in a compression direction and an extension direction opposite from the compression direction;
- a coil spring arranged to bias the outer member in the extension direction relative to the inner member;
- and
- a first bumper insert arranged at a first end of the coil spring;
- a second bumper insert arranged at a second end of the coil spring;
- a preload member extending from the first bumper insert to the second bumper insert, the preload member configured to apply a compression preload to the coil spring.
4 more elements
A method of making a spring assembly, comprising:
- providing a tubular outer member including a support end and an open receiving end opposite the support end;
- providing an inner member including an insertion end and a mounting end opposite the insertion end;
- arranging a coil spring to bias the outer member in the extension direction relative to the inner member;
- and
- arranging a first bumper insert at a first end of the coil spring;
- arranging a second bumper insert at a second end of the coil spring;
- arranging a preload member extending from the first bumper insert to the second bumper insert, the preload member configured to apply a compression preload to the coil spring.
4 more elements
A spring assembly, comprising:
- a tubular outer member including a support end and an open receiving end opposite the support end;
- an inner member including an insertion end and a mounting end opposite the insertion end, wherein the insertion end is received by the outer member through the open receiving end of the outer member, the outer member being telescopically movable relative to the inner member in a compression direction and an extension direction opposite from the compression direction;
- a coil spring arranged to bias the outer member in the extension direction relative to the inner member;
- and
- a first bumper insert arranged at a first end of the coil spring;
- a second bumper insert arranged at a second end of the coil spring;
- a preload member having a length extending from the first bumper insert to the second bumper insert and having protruded ends that extend past an end of the first bumper insert and an end of the second bumper insert;
- wherein the preload member, the first bumper insert, and the second bumper insert apply a compression preload to the coil spring;
- wherein the length of the preload member extends along approximately a center axis of the coil spring, the length of the preload member being flexible.
6 more elements
Dependencies are inferred from the claim text.