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US 5,291,714 AGranted
Grating assembly
AssigneeArchitectural Gratings & Grillwork, Inc.
InventorsBruce H. Wright, George Gillis
Life of this patent
Estimating the term…
Abstract
A grating assembly comprising end rails, substantially J-shaped, with a bottom, outside wall and substantially parallel inside wall, about one-half the height of the outside wall. The inside wall is formed with slots to hold intermediate spacer bars that support tread rails which are in a spaced relation to one another.
Claims6
A grating assembly comprising:
- (a) a plurality of pairs of end rails each in an opposed relationship and each having a bottom and a spaced parallel upwardly extending outside wall having a specified height and an inside wall the inside wall containing a plurality of slots, said inside wall being about one-half the height of the outside wall;
- (b) a plurality of tread rails each having a first end and a second end said tread rails being arranged in a closely spaced relation, the first end engaging the outside wall of an end rail and being secured in a slot in the inside wall of the end rail, the second end of the tread rail being secured in a slot in the inside wall of an opposed end rail and engaging the outside wall of the opposed end rail;
- and
- (c) a plurality of intermediate spacer support bars engaging the tread rails between the end rails.
1 more element
A circular grating assembly comprising:
- (a) a plurality of pairs of J-shaped end rails each in an opposed relationship and each having a bottom and a spaced parallel upwardly extending outside wall having a specified height and an inside wall, the inside wall containing a plurality of slots, said inside wall being about one-half the height of the outside wall;
- (b) a plurality of tread rails each having a first end and a second end, said tread rails being arranged in a closely spaced relation, the first end engaging the outside wall of an end rail and being secured in a slot in the inside wall of the end rail, the second end of the tread rail being secured in a slot in the inside wall of an opposed end rail while engaging the outside wall of the opposed end rail;
- and
- (c) a plurality of intermediate spacer support bars engaging the tread rails between the end rails.
1 more element
Dependencies are inferred from the claim text.