Back to results
US 5,509,212 AGranted
Folding and locking drafting aid apparatus and method
OwnerDouglas A. Henrickseninventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerDouglas A. Henrickseninventor
Estimating the term…
A folding drafting aid apparatus includes a planar member having a first and second planar member ends and a first planar member side and a second planar member side, and being foldable at a hinge structure so that the second planar member side pivots face to face against itself; a flexible, resilient first tab having a free end and retained on a first tab structure; and a flexible, resilient second tab having a tab free end and retained on a second tab structure; where the tabs are positioned relative to each other so that when the planar member is folded at the hinge structure to pivot the second planar member side face to face against itself, one tab overlays the other tab and so that pressing one tab against the other tab causes both tabs to bend until the free end of the one tab crosses over the free end of the other tab and remains in this crossed-over position to hold the planar member in the folded position.
A folding latchable drawing aid apparatus, comprising:
A method of latching the ends of a folding drafting aid apparatus together wherein said drafting aid apparatus comprises a planar member having a first end and a second end and a first side and a second side, and being foldable at hinge means such that said second side pivots face to face against itself, a flexible first tab having a first free end and retained on a first tab structure directed away from said first end, and a flexible, resilient second tab having a second free end and retained on a second tab structure directed toward said second end, comprising the steps of:
A method of latching the ends of a folding drafting aid apparatus together wherein said drafting aid apparatus comprises a planar member having a first end and a second end and a first side and a second side, and being foldable at hinge means such that said second side pivots face to face against itself, a flexible first tab having a first free end and retained on a first tab structure directed away from said first end, and a flexible, resilient second tab having a second free end and retained on a second tab structure directed toward said second end, comprising the steps of:
Dependencies are inferred from the claim text.