ZERO INPUT BIAS CURRENT, AUTO-ZEROED BUFFER FOR A SAMPLE AND HOLD CIRCUIT
    21.
    发明申请
    ZERO INPUT BIAS CURRENT, AUTO-ZEROED BUFFER FOR A SAMPLE AND HOLD CIRCUIT 审中-公开
    零输入偏置电流,自动归零缓冲器,用于样品和保持电路

    公开(公告)号:US20100194447A1

    公开(公告)日:2010-08-05

    申请号:US12365960

    申请日:2009-02-05

    申请人: James Garrett

    发明人: James Garrett

    IPC分类号: H03K3/00

    CPC分类号: G11C27/026 G11C27/02

    摘要: An auto-zeroing, high impedance buffer for a sample and hold module that draws substantially no current from the input and has substantially no offset voltage at the output is discussed. During a hold mode, the offset voltage of an op-amp is accumulated on a capacitor. When the sample operation ensues the input signal is directed to the op-amp input via the capacitor where the circuitry is arranged so that the offset on the capacitor cancels the offset voltage of the op-amp. A second circuit may be fashioned and input to a sample and hold circuit for full differential operation.

    摘要翻译: 讨论了用于采样和保持模块的自动归零高阻抗缓冲器,其基本上不从输入端抽取电流,并且在输出端基本上没有偏移电压。 在保持模式期间,运算放大器的偏移电压累积在电容器上。 当采样操作接着输入信号通过电路布置在电容器上的运算放大器输入端时,电容器的偏移消除了运算放大器的偏移电压。 可以形成第二电路并将其输入到采样和保持电路以进行全差分操作。

    Automated System for Positioning and Supporting the Work Platform of a Mobile Workover and Well-Servicing Rig
    24.
    发明申请
    Automated System for Positioning and Supporting the Work Platform of a Mobile Workover and Well-Servicing Rig 有权
    定位和支持移动修复和维修服务工作平台的自动化系统

    公开(公告)号:US20080063498A1

    公开(公告)日:2008-03-13

    申请号:US11938676

    申请日:2007-11-12

    IPC分类号: B60P1/46

    摘要: A method and apparatus for positioning and supporting the work platform of a mobile workover rig is disclosed. The work platform of the preferred embodiment of the present invention utilizes a unique support structure and automated positioning system for positioning the work platform at the desired height above the wellhead equipment. The preferred embodiment of the present invention utilizes a specialized automated “pinning” system that secures the work platform at the desired height. Additionally, the present invention utilizes one or more support cylinders to position and support the work platform in the horizontal position over the wellhead equipment. The automated positioning and pinning system of the present invention is a unique system that significantly reduces the time required to position the work platform of a mobile workover rig in the operating position, as well as significantly reduces the risk of injury to rig personnel assisting in the positioning operations.

    摘要翻译: 公开了一种用于定位和支撑移动修井机的工作平台的方法和装置。 本发明的优选实施例的工作平台利用独特的支撑结构和自动定位系统来将工作平台定位在井口设备上方所需的高度处。 本发明的优选实施例利用专门的自动化“固定”系统,其将工作平台固定在期望的高度。 此外,本发明利用一个或多个支撑筒来在井口设备上的水平位置定位和支撑工作平台。 本发明的自动定位和钉扎系统是独特的系统,其显着地减少了将移动修井机的工作平台定位在操作位置所需的时间,并且显着降低了对钻井人员的伤害的风险, 定位操作。

    Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rig
    25.
    发明申请
    Automated system for positioning and supporting the work platform of a mobile workover and well-servicing rig 有权
    自动化系统,用于定位和支持移动式修井和维修钻井平台的工作平台

    公开(公告)号:US20080038093A1

    公开(公告)日:2008-02-14

    申请号:US11973491

    申请日:2007-10-08

    IPC分类号: B66C23/60 B66F11/00 E21B19/00

    摘要: A method and apparatus for positioning and supporting the work platform of a mobile workover rig is disclosed. The work platform of the preferred embodiment of the present invention utilizes a unique support structure and automated positioning system for positioning the work platform at the desired height above the wellhead equipment. The preferred embodiment of the present invention utilizes a specialized automated “pinning” system that secures the work platform at the desired height. Additionally, the present invention utilizes one or more support cylinders to position and support the work platform in the horizontal position over the wellhead equipment. The automated positioning and pinning system of the present invention is a unique system that significantly reduces the time required to position the work platform of a mobile workover rig in the operating position, as well as significantly reduces the risk of injury to rig personnel assisting in the positioning operations.

    摘要翻译: 公开了一种用于定位和支撑移动修井机的工作平台的方法和装置。 本发明的优选实施例的工作平台利用独特的支撑结构和自动定位系统来将工作平台定位在井口设备上方所需的高度处。 本发明的优选实施例利用专门的自动化“固定”系统,其将工作平台固定在期望的高度。 此外,本发明利用一个或多个支撑筒来在井口设备上的水平位置定位和支撑工作平台。 本发明的自动定位和钉扎系统是独特的系统,其显着地减少了将移动修井机的工作平台定位在操作位置所需的时间,并且显着降低了对钻井人员的伤害的风险, 定位操作。

    Pavement/surface sweeper having a simplified hydraulic system
    26.
    发明申请
    Pavement/surface sweeper having a simplified hydraulic system 失效
    路面/清扫机具有简化的液压系统

    公开(公告)号:US20070124892A1

    公开(公告)日:2007-06-07

    申请号:US11585997

    申请日:2006-10-25

    IPC分类号: E01H1/08

    CPC分类号: E01H1/0854

    摘要: A sweeper unit well-suited for use for sweeping paved areas includes a debris-retaining hopper with an associated fan assembly that includes an air outlet duct for connection to one side of a pick-up head and an inlet duct for connection between the other side of the pickup head and the debris-retaining hopper. A fan drive arrangement includes at least a first and a second hydraulic displacement device to drive the fan and, when required, provide a flow of hydraulic fluid for auxiliary devices including the gutter broom motor(s).

    摘要翻译: 适用于清扫铺设区域的清扫装置包括具有相关联的风扇组件的碎屑保持料斗,其包括用于连接到拾取头的一侧的出气管道和用于在另一侧之间连接的入口管道 的拾取头和碎屑保留料斗。 风扇驱动装置包括至少一个驱动风扇的第一和第二液压位移装置,并且当需要时,为包括天沟扫帚马达的辅助装置提供液压流体流。

    Low surface energy, ethylenically unsaturated polyisocyanate addition compounds and their use in coating compositions
    27.
    发明申请
    Low surface energy, ethylenically unsaturated polyisocyanate addition compounds and their use in coating compositions 审中-公开
    低表面能,烯键式不饱和多异氰酸酯加成化合物及其在涂料组合物中的应用

    公开(公告)号:US20070112164A1

    公开(公告)日:2007-05-17

    申请号:US11281080

    申请日:2005-11-17

    IPC分类号: C08G18/00

    摘要: The present invention is directed to polyisocyanate addition compounds which i) are substantially free from isocyanate groups and are prepared from one or more monomeric polyisocyanates and/or polyisocyanate adducts, ii) contain allophanate groups, iii) contain siloxane groups (calculated as SiO, MW 44) in an amount of 0.002 to 50% by weight, and iv) contain ethylenically unsaturated groups (calculated as C═C, MW 24) in an amount of 2 to 40% by weight, wherein the preceding percentages are based on the solids content of the polyisocyanate addition compounds and wherein the siloxane groups are incorporated by reacting an isocyanate group with a compound containing one or more hydroxyl groups directly attached to a carbon atom and one or more siloxane groups to form urethane groups and/or allophanate groups, provided that more than 50 mole % of the groups that chemically incorporate siloxane groups into the polyisocyanate addition compounds are allophanate groups. The present invention also relates to the use of the polyisocyanate addition compounds in coating compositions curable by free radical polymerization.

    摘要翻译: 本发明涉及多异氰酸酯加成化合物,其i)基本上不含异氰酸酯基团,并且由一种或多种单体多异氰酸酯和/或多异氰酸酯加合物制备,ii)含有脲基甲酸酯基团,iii)含有硅氧烷基团(按SiO计,MW 44),其量为0.002至50重量%,和iv)含有2-40重量%的烯键式不饱和基团(以CC,MW 24计算),其中前述百分比基于 所述多异氰酸酯加成化合物,其中所述硅氧烷基团通过使异氰酸酯基团与直接与碳原子连接的一个或多个羟基的化合物和一个或多个硅氧烷基团反应形成氨基甲酸酯基和/或脲基甲酸酯基而引入,条件是更多 将硅氧烷基团化学引入到多异氰酸酯加成化合物中的基团的50摩尔%为脲基甲酸酯基。 本发明还涉及多异氰酸酯加成化合物在通过自由基聚合可固化的涂料组合物中的用途。

    Low surface energy polyisocyanates and their use in one-or two-component coating compositions
    29.
    发明申请
    Low surface energy polyisocyanates and their use in one-or two-component coating compositions 审中-公开
    低表面能多异氰酸酯及其在单组分或双组分涂料组合物中的用途

    公开(公告)号:US20070032625A1

    公开(公告)日:2007-02-08

    申请号:US11198733

    申请日:2005-08-05

    IPC分类号: C08G18/00

    摘要: The present invention is directed to a polyisocyanate mixture i) having a monomeric diisocyanate content of less than 3% by weight, ii) having a urethane group content of more than 50 equivalent %, based on the total equivalents of urethane and allophanate groups, and iii) containing fluorine (calculated as F, AW 19) in an amount of 0.001 to 50% by weight, wherein the preceding percentages are based on the solids content of the polyisocyanate mixture and wherein fluorine is incorporated by reacting a) an isocyanate group from a polyisocyanate adduct containing at least 60% by weight, based on the total weight of the polyisocyanate adduct, of a polyisocyanate adduct which is prepared from 1,6-hexamethylene diisocyanate, contains isocyanurate, iminooxadiazine dione and/or uretdione groups and has a viscosity at 25° C. and 100% solids of less than 2000 mPa·s, with b) a compound containing two or more carbon atoms, one or more hydroxyl groups and one or more fluorine atoms to form urethane groups. The present invention is also directed to the use of this polyisocyanate mixture, optionally in blocked form, as an isocyanate component in one- or two-component coating compositions.

    摘要翻译: 本发明涉及单体二异氰酸酯含量小于3重量%的二异氰酸酯混合物,ii)氨基甲酸酯基含量大于等于50当量的氨基甲酸酯和脲基甲酸酯基,和 iii)以0.001至50重量%的量含有氟(以F,AW 19计算),其中前述百分比基于多异氰酸酯混合物的固体含量,并且其中通过使a)异氰酸酯基团从 基于多异氰酸酯加合物的总重量至少60重量%的由1,6-六亚甲基二异氰酸酯制备的多异氰酸酯加合物的多异氰酸酯加合物含有异氰脲酸酯,亚氨基恶二嗪二酮和/或脲二酮基团,并且具有粘度 在25℃和100%固体含量小于2000mPa.s,b)含有两个或更多个碳原子的化合物,一个或多个羟基和一个或多个氟原子以形成氨基甲酸酯 e组。 本发明还涉及这种多异氰酸酯混合物(任选地以封闭形式)作为单组分或双组分涂料组合物中的异氰酸酯组分的用途。