Stock material or miscellaneous articles – All metal or with adjacent metals – Having aperture or cut
Patent
1989-08-28
1990-09-04
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having aperture or cut
428603, 52257, E04C 501
Patent
active
049544020
ABSTRACT:
A retarder prevents the erosion of refractory material at a refractory corner over which fluid flows. The retarder is formed from an integral, flat piece of metal bent to form an elongated, horizontal leg and an elongated upright leg faced in parallel planes and connected by an elongated, rectangular baffle. The horizontal leg has a forward edge which tapers upwardly and forwardly to an acute angle. The upright leg has an upper edge which tapers upwardly and forwardly to an angle which complements the acute angle on the forward edge of the horizontal leg. The two legs are integrally connected by an elongated rectangular baffle with one end extending from the tapered edge of the horizontal leg and the other end extending from the tapered edge of the upright leg. The baffle is perpendicular to the legs. Each of the legs has at least two ears, one extending integrally away from each side of its leg. The ears will be embedded in the refractory material proximate the leg to secure the bond between the refractory material and the legs. The baffle will be embedded in the refractory material disposed along the corner of the refractory to anchor the refractory material along the refractory corner against erosion as fluid flows over the corner.
In one embodiment, the horizontal and upright legs are downwardly or rearwardly turned, respectively, in complementary circular arcs with the rectangular baffle connecting the edges of the legs at the ends of the arcs.
Preferably, the complementary tapers or arcs are approximately at an angle of forty-five degrees.
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patent: 881463 (1908-03-01), Cushwa
patent: 956439 (1910-04-01), Shear
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patent: 1454042 (1923-05-01), Curtis
patent: 1652674 (1927-12-01), Keas
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