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1. 发明申请

US20080138153A1 LIFT-ASSISTED MANHOLE COVER 审中-公开
标题翻译：提升辅助舱盖
公开(公告)号：US20080138153A1
公开(公告)日：2008-06-12
申请号：US11969361
申请日：2008-01-04
申请人： Jeremy I. Johnson , Lee M. Veldboom , Scott B. Beal , Herbert Carl Barnum , William R. Austin , James F. Malpass , Todd C. Loviska , Brian J. Rachwitz , Rex A. Garringer , John H. Snyder
发明人： Jeremy I. Johnson , Lee M. Veldboom , Scott B. Beal , Herbert Carl Barnum , William R. Austin , James F. Malpass , Todd C. Loviska , Brian J. Rachwitz , Rex A. Garringer , John H. 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。

2. 发明授权

US07341398B2 Lift-assisted manhole cover 有权
标题翻译：电梯辅助井盖
公开(公告)号：US07341398B2
公开(公告)日：2008-03-11
申请号：US11420083
申请日：2006-05-24
申请人： Jeremy I. Johnson , Lee M. Veldboom , Scott B. Beal , Herbert Carl Barnum , William R. Austin , James F. Malpass , Todd C. Loviska , Brian J. Rachwitz , Rex A. Garringer , John H. Snyder
发明人： Jeremy I. Johnson , Lee M. Veldboom , Scott B. Beal , Herbert Carl Barnum , William R. Austin , James F. Malpass , Todd C. Loviska , Brian J. Rachwitz , Rex A. Garringer , John H. Snyder
IPC分类号： B65D43/18
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。

3. 发明授权

US4220927A Electrical signal converter usable in triangular waveform generation 失效
标题翻译：电信号转换器可用于三角形波形生成
公开(公告)号：US4220927A
公开(公告)日：1980-09-02
申请号：US898033
申请日：1978-04-20
申请人： William R. Austin
发明人： William R. Austin
IPC分类号： H03K4/06 , H03K4/10
CPC分类号： H03K4/06
摘要： A signal having instantaneous voltage values, defined by a peak-to-peak voltage magnitude and a D.C. offset voltage level, is converted into another signal having time corresponding waveform characteristics similar to the unconverted signal but having different instantaneous voltage values defined by a lesser peak-to-peak magnitude and/or another D.C. offset voltage level. This signal conversion is used by a triangle generator of the type employing an integrator, detector/control, and a switch so that triangular waveforms of any desired peak-to-peak magnitude and D.C. offset voltage level are produced independent of detector/control requirements.
摘要翻译：具有由峰 - 峰电压幅度和DC偏移电压电平定义的瞬时电压值的信号被转换为具有与未转换信号类似的具有时间对应波形特性但具有由较小峰值定义的不同瞬时电压值的另一信号峰值幅度和/或另一个DC偏移电压电平。该信号转换由采用积分器，检测器/控制和开关的三角形发生器使用，使得任何期望的峰 - 峰幅度和直流偏移电压电平的三角波形独立于检测器/控制要求而被产生。

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