Manhole ladder step unit专利检索-悬臂梁木工，框架和细木工专利检索查询-专利查询网

Manhole ladder step unit

阅读：818发布：2024-02-03

专利汇可以提供Manhole ladder step unit专利检索，专利查询，专利分析的服务。并且A non-metallic manhole ladder step unit of high-strength plastic molding composition, having spaced cantilevered side beams to be embedded in a wall and a cross beam to form a ladder step. High strength and good molding characteristics are obtained by forming the beams with longitudinal walls which are vertically deep but transversely thin, joined in an inverted-U or other mutually reinforcing relation. For best characteristics, a thermosetting molding composition is used, containing at least 20 percent and preferably 30 to 50 percent reinforcing glass fiber, 25 to 60 percent mineral filler, preferably hydrated alumina, and 20 to 50 percent thermosetting resin, such as polyester or epoxy resin. Thermoplastic compositions, especially high temperature compositions containing glass fiber reinforcement, may also be used when lower strength and flame characteristics are acceptable.，下面是Manhole ladder step unit专利的具体信息内容。

权利要求

1. A manhole ladder step unit, comprising a pair of spaced side beams adapted to be mounted with one end thereof embedded in the face of a concrete or masonry wall and to project therefrom as cantilever beams, and a cross beam at the projecting ends of the side beams to form a step spaced from the wall, each said beam comprising integrally-joined molded walls which extend longitudinally of the beam substantially the full length thereof, and including in cross section at least one wall which extends substantially the full vertical depth of the beam and at least one wall disposed at an angle thereto to reinforce the same, each such wall having a molding-section thickness less than one-half the dimension of the beam in the direction of such thickness, said beams being entirely composed of a high-strength-resinous molding composition and from 0% to 50% by weight of reinforcing glass fiber.

2. A manhole ladder step as defined in claim 1, wherein said beams are molded of a thermosetting molding composition containing, by weight, 20 to 50 percent fiber glass 20 to 50 percent thermosetting molding resin 25 to 60 percent mineral filler.

3. A manhole ladder step unit as defined in claim 1 wherein said beams are molded of a thermosetting molding composition containing, by weight, 30 to 50 percent fiberglass, 20 to 50 percent thermosetting resin, 25 to 60 percent hydrated alumina.

4. A manhole ladder step unit as defined in claim 3, in which the thermosetting resin is a polyester resin.

5. A manhole ladder step unit as defined in claim 3, in which the thermosetting resin is an epoxy resin.

6. A manhole ladder step unit as defined in claim 1 in which said beams are molded of a thermoplastic molding composition containing from 20 to 50 percent glass fiber and from 0 to 10 percent pigment.

7. A manhole ladder step as set forth in claim 1 in which said side and cross beams are of inverted channel shape, having spaced vertically-disposed longitudinal side walls integrally joined adjacent the top by a connecting wall.

说明书全文

相关专利内容

标题	发布/更新时间	阅读量
基于FDCA的聚酯	2021-03-16	1
基于低熔点玻璃焊接的光纤光栅高灵敏度温度传感器	2021-06-07	1
一种小车钢绳驱动和带反倾翻装置的桥式悬臂起重机	2020-09-28	0
超大体量木牌科的支撑拉结体系及其施工方法	2021-04-11	2
电线对基板用连接器	2021-06-17	0
电感悬臂梁无线无源湿度传感器	2020-09-20	1
双向磁力耦合轴向激励并限位的转轴式压电发电机	2021-05-12	0
一种基于微机械耦合器和直接式功率传感器的风速计	2021-02-06	1
一种用于动力吸振器性能演示的教学实验装置	2020-06-21	2
Acceleration sensor	2023-06-30	0

高效检索全球专利

专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。

我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。

申请试用

分析报告

专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。

申请试用

悬臂梁热门专利

热门分类

Manhole ladder step unit

该功能需要专业版企业版VIP权限，您可以：