roller gate

roller gate

[′rō·lər ‚gāt]
(civil engineering)
A cylindrical, usually hollow crest gate that is raised and lowered by large toothed wheels running on sloping racks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The protesters attacked an arcade gaming center, prying open the roller gate and vandalizing exterior walls and video cameras.
After the slats are installed upstream of jammed roller gate No.
This manufacturer introduces a new gravity flow slide gate that is as robust as the the company's Aggregate Gate, but has the superior dust-tight seal of the its Roller Gate. The Titan Series abrasion resistant slide gate is the perfect gate for abrasive materials such as whole grains, coal, metal powders, or minerals up to 400[degrees]F (204[degrees]C).
After the molds are stripped from the patterns, the patterns are transferred back to the molding line by the use of pop-up rollers and a gravity roller gate (Fig.
When debris gathers against a Leaburg Dam roller gate, EWEB crews try to "flush" it under the gates by lifting the gates high.
A new dual-cylinder roller gate from Salina Vortex Corp., Salina, Kan., handles dry materials in gravity-flow applications where positive material shutoff and a dust-tight seal are required.