公开(公告)号：US20070274779A1

公开(公告)日：2007-11-29

申请号：US11420083

申请日：2006-05-24

申请人： Jeremy Johnson ,  Lee Veldboom ,  Scott Beal ,  Herbert Barnum ,  William Austin ,  James Malpass ,  Todd Loviska ,  Brian Rachwitz ,  Rex Garringer ,  John Snyder

发明人： Jeremy Johnson ,  Lee Veldboom ,  Scott Beal ,  Herbert Barnum ,  William Austin ,  James Malpass ,  Todd Loviska ,  Brian Rachwitz ,  Rex Garringer ,  John Snyder

IPC分类号： E02D29/14

CPC分类号： E02D29/1418 ,  Y10T137/7021

摘要： A lift-assisted manhole cover assembly with a flush surface and external pivot shaft. The cover includes a mounting tab that extends beyond the general periphery of the cover. The mounting tab may be connected to a shaft that is threadedly engaged with the frame. A spring may be mounted between the frame and the mounting tab, for example, in a sleeve, to provide a mechanical assist in lifting the cover. The sleeve may be disposed outside the manhole opening where it does not block access to the manhole opening.

摘要翻译： 具有平齐表面和外部枢转轴的升降机辅助井盖组件。 该盖包括延伸超出盖的一般周边的安装片。 安装翼片可以连接到与框架螺纹接合的轴。 弹簧可以安装在框架和安装突片之间，例如在套筒中，以提供提升盖子的机械辅助。 套管可以设置在人孔开口的外部，在那里它不阻挡进入人孔开口。

公开(公告)号：US20060236610A1

公开(公告)日：2006-10-26

申请号：US11112296

申请日：2005-04-22

申请人： Herbert Barnum

发明人： Herbert Barnum

IPC分类号： E05F11/24

CPC分类号： E05D13/1253

摘要： A cast hatch having a frame, a hinged cover and a lift assist mechanism. The lift assist mechanism includes a torsion spring with threaded ends. A slide block is threadedly mounted to one threaded end to provide an interface between the spring and the cover. A pressure block is threadedly mounted to the other end to provide an interface between the spring and the frame or support structure. In one embodiment, the lift assist includes two torsion springs. In this embodiment, the two torsion springs may be mounted to a single slide block at one end and mounted to separate pressure blocks at the other end. The pressure blocks may be generally rectangular and include an eccentrically disposed through bore to be fitted over a threaded end of the spring.

摘要翻译： 具有框架，铰接盖和升降机辅助机构的铸模舱口。 提升辅助机构包括具有螺纹端部的扭簧。 滑动块被螺纹安装到一个螺纹端，以提供弹簧和盖之间的接口。 压块被螺纹地安装到另一端以提供弹簧和框架或支撑结构之间的界面。 在一个实施例中，提升辅助包括两个扭转弹簧。 在该实施例中，两个扭转弹簧可以在一端安装到单个滑动块并且在另一端安装到单独的压力块。 压力块可以是大致矩形的，并且包括偏心地设置的通孔以装配在弹簧的螺纹端上。