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公开(公告)号：US4838524A
公开(公告)日：1989-06-13
申请号：US94242
申请日：1987-09-08
申请人： Patrick D. McKeown , Jack W. Neiger
发明人： Patrick D. McKeown , Jack W. Neiger
CPC分类号： E01F8/0017 , E01F8/0011 , E01F8/0035 , E01F8/007 , F24F13/24 , F24F2013/245
摘要： A noise barrier system having support members and noise absorbing panels is disclosed. The noise absorbing panels include a front corrugated perforated sheet and a rear corrugated solid sheet which define a chamber. A central sinusoidally corrugated perforated sheet is provided within the chamber. A first blanket of low frequency noise absorbing material is disposed adjacent the front face of the central member and is configured so that a resonance zone is provided between the first blanket and the rear surface of the front sheet. A second blanket of higher frequency sound absorbing material is provided between the rear surface of the central member and the front surface of the rear sheet.
摘要翻译： 公开了一种具有支撑构件和噪声吸收板的噪声屏障系统。 吸声板包括前波纹孔板和限定腔室的后波纹状固体片。 中心的正弦波形的多孔板被提供在腔室内。 低频噪声吸收材料的第一毯子邻近中心构件的前表面设置，并且构造成使得在第一毯和前片的后表面之间设置共振区。 高频吸声材料的第二层被提供在中心构件的后表面和后片的前表面之间。
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公开(公告)号：US4964618A
公开(公告)日：1990-10-23
申请号：US420613
申请日：1989-10-10
CPC分类号： E04H17/1413 , E01F8/007 , E04H2017/146
摘要： A metal fence (20) is constructed by a fence system with components including clips (26), fence posts (22) allowing rails (24) to engage with the posts and caps (21) to cover the seam between the rails. A solid wall fence (50) can be constructed using fasteners (228, 62), posts (58) and rails (32, 52, 54, 56, 60). Rails (32, 52, 54, 56, 60) slide along a channel (36) to form an interlocking seam (34).
摘要翻译： 金属栅栏（20）由围栏系统构成，其中包括夹子（26），护栏柱（22），轨道（24）与柱和盖（21）接合以覆盖轨道之间的接缝。 可以使用紧固件（228,62），柱（58）和轨道（32,52,54,56,60）来构造实心的围墙（50）。 轨道（32,52,54,56,60）沿着通道（36）滑动以形成互锁接缝（34）。
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