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US 4,822,205 AGranted
Fold-up corner piece for spacer tube assembly
AssigneeIndal Limited
InventorGunter Berdan
Life of this patent
Estimating the term…
Abstract
A corner piece for use in a spacer tube assembly includes a pair of arms each adapted to enter into and engage within an end portion of a respective spacer tube; hinge means defining a hinge axis and permitting said arms to be pivoted into a generally right angle relationship with each other; and friction means on each of said arms adapted to come into close contacting relation with each other as said arms are pivoted toward said right angle relationship to frictionally retain said arms in said generally right angle relationship.
Claims10
A corner piece for use in a spacer tube assembly comprising:
- (a) a pair of arms each adapted to enter into and engage within an end portion of a respective spacer tube;
- (b) hinge means defining a hinge axis ad permitting said arms to be pivoted into a predetermined angular relationship with each other;
- (c) friction means on each of said arms adapted to come into close contacting relation with each other as said arms are pivoted toward said predetermined angular relationship to frictionally retain said arms in said predetermined angular relationship;
- (d) said friction means comprising fin means on each of said arms which extend generally normal to said hinge axis, the fin means on one said arm being arranged to come into tight interdigitating or interleaved relation with the fin means on the other said arm as said arms are pivoted toward said predetermined angular relationship;
- (e) said fin means being in the form of multiple, spaced, generally parallel fins on each of said arms, the fins having generally planar walls which are substantially devoid of interengaging catches or recesses so that substantially pure frictional engagement takes place between the tightly interleaved fins of said arms.
2 more elements
Dependencies are inferred from the claim text.