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US 10,174,544 B2Granted
Corner key for extruded windows and doors
AssigneeAmesbury Group, Inc.
InventorWilbur J. Kellum
Life of this patent
Estimating the term…
Abstract
A corner key includes a heel and at least one leg extending along an axis from the heel. The at least one leg includes a retention element and a lifting cam such that upon insertion into a frame member the lifting cam induces a bending stress in the retention element.
Claims16
A corner key comprising:
- a heel;
- and
- at least one leg extending along an axis from the heel, the at least one leg comprising a first surface having a retention element and an opposite second surface having a lifting cam, wherein upon insertion into a frame member, the lifting cam slides along an outer surface of the frame member to induce a bending stress in the retention element against an inner surface of the frame member.
A corner key comprising:
- a heel;
- a first leg extending along a first axis from the heel, wherein the first leg comprises a first inner surface defining a first tapered cantilevered arm and an opposite first outer surface defining a first lifting cam;
- and
- a second leg extending along a second axis from the heel, wherein the second leg comprises a second inner surface defining a second tapered cantilevered arm and an opposite second outer surface defining a second lifting cam wherein upon insertion into a respective frame member, each respective lifting cam slides along an outer surface of the frame member to induce a bending stress in the respective cantilevered arm against an inner surface of the frame member.
1 more element
Dependencies are inferred from the claim text.