Pilot controlled poppet valve assembly
    1.
    发明授权
    Pilot controlled poppet valve assembly 失效
    先导控制提升阀总成

    公开(公告)号:US4149565A

    公开(公告)日:1979-04-17

    申请号:US765012

    申请日:1977-02-02

    摘要: A valve assembly is provided in which a first poppet member and at least one subsequent poppet member each having a valve face engageable with a valve seat between first and second passages. A first and a subsequent pilot valve is operative for selectively establishing communication between a fluid reservoir and a space at one side of a piston portion of each poppet member and a pair of restricted flow passages are provided in each poppet member between such space and the first and second passages, such restricted flow passages being preferably formed in the poppet members with ball check valves provided therein. Such restricted flow passages operate upon closure of the pilot valve to develop a static pressure in the space corresponding to the pressure in the one of the first and second passage which has the higher pressure therein so as to move the poppet member to and hold it in its closed position in response to pressures applied from either of the first and second passages. Preferably, a plurality of valve units are provided in a common valve body, each including a poppet member and a pilot valve.

    摘要翻译: 提供了一种阀组件,其中第一提升阀构件和至少一个随后的提升阀构件各自具有可在第一和第二通道之间与阀座接合的阀面。 第一和随后的先导阀可操作用于选择性地建立流体储存器与每个提升阀构件的活塞部分的一侧的空间之间的连通,并且在每个提升阀构件之间设置有一对受限流动通道, 和第二通道,优选地,这种限制流动通道形成在提升阀构件中,其中设置有止回阀。 这种受限制的流动通道在先导阀关闭时进行操作,以在相应于第一和第二通道中的压力的​​空间中产生静压,其中压力在其中具有较高的压力,以便将提升阀构件移动并将其保持在 其响应于从第一和第二通道中的任一个施加的压力而关闭位置。 优选地,多个阀单元设置在公共阀体中,每个阀单元包括提升阀构件和先导阀。

    Shear with adjustable blade spacing
    4.
    发明授权
    Shear with adjustable blade spacing 失效
    剪切间距可调

    公开(公告)号:US5572857A

    公开(公告)日:1996-11-12

    申请号:US417942

    申请日:1995-04-06

    申请人: Robert D. Barrett

    发明人: Robert D. Barrett

    摘要: A shear capable of cutting weeds close to the ground, without cutting grass in the presence of the weeds, is described. The shear can be implemented as a battery operated hand held device or as a shear mounted on a lawn mower. The shear operates by maintaining a spacing between the blades such that the flexible grass will only be bent between the blades. Weeds which have a thicker and stiffer shaft than the grass will be cut, thus functioning as a selective mechanical herbicide.

    摘要翻译: 描述了能够在杂草存在的情况下切割接近地面的杂草而不切割草的剪切。 剪切可以实现为电池操作的手持装置或作为安装在割草机上的剪切。 剪切通过保持叶片之间的间隔来操作,使得柔性草仅在叶片之间弯曲。 具有比草重的较硬且较硬的轴的杂草将被切割,因此用作选择性机械除草剂。

    Eyeglass support
    5.
    发明授权
    Eyeglass support 失效
    眼镜支撑

    公开(公告)号:US5005263A

    公开(公告)日:1991-04-09

    申请号:US426305

    申请日:1989-10-24

    申请人: Robert D. Barrett

    发明人: Robert D. Barrett

    IPC分类号: G02C3/00

    摘要: An eyeglass support system including an eyeglass frame having a frame front, a temple at each side of the frame front, a pair of earpieces connected to the temples by hinges, an elongated flexible member for securing the frame to a wearer, and a securing mechanism for attaching a flexible member to the frame. The securing mechanism includes an eyelet secured to the frame, and at least one clip for removably attaching the flexible member to the eyelet. In a preferred embodiment, the clip includes a body portion and a hook portion between which extends a spring bar closure. The spring bar closure is opened and closed by means of a spring bar lever that is pivotably attached to the body portion of the clip. The eyelet itself may be mounted on various portions of the eyeglass hinge.

    摘要翻译: 一种眼镜支撑系统,包括具有框架前部的框架框架,在框架前侧的每侧的镜腿,通过铰链连接到镜腿的一对耳机,用于将框架固定到佩戴者的细长柔性构件以及固定机构 用于将柔性构件附接到框架。 固定机构包括固定在框架上的孔眼和至少一个用于将柔性构件可移除地附接到孔眼的夹子。 在优选实施例中,夹具包括主体部分和钩部分,在该部分之间延伸有弹簧杆盖。 弹簧杆关闭通过可枢转地附接到夹子的主体部分的弹簧杆杆打开和关闭。 孔眼本身可以安装在眼镜铰链的各个部分上。