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    Self-adjusting caster assemblies
    1.
    发明授权
    Self-adjusting caster assemblies 有权

    公开(公告)号：US11975568B2

    公开(公告)日：2024-05-07

    申请号：US17156328

    申请日：2021-01-22

    Applicant: Gatekeeper Systems, Inc.

    Inventor： John C. McKay

    IPC: B60B33/04 ,  B60B33/00

    CPC classification number: B60B33/045 ,  B60B33/0076

    Abstract: A self-leveling caster assembly includes a caster frame and a castor fork which is configured to pivot relative to the caster frame. A spring or other biasing mechanism biases the caster fork away from the caster frame, to maintain contact between the ground and a wheel supported by the caster fork along a travel range of the wheel. Even if a frame supporting the self-leveling caster assembly is bent, pulling the wheel away from the ground, the biased caster fork will maintain contact between the ground and the wheel, allowing continued use of a shopping cart or other wheeled apparatus including the self-leveling caster assembly.

    SOLAR POWERED TRANSMITTER
    6.
    发明申请
    SOLAR POWERED TRANSMITTER 有权
    太阳能发电机

    公开(公告)号：US20130184897A1

    公开(公告)日：2013-07-18

    申请号：US13720459

    申请日：2012-12-19

    Applicant: GATEKEEPER SYSTEMS, INC.

    Inventor： John C. McKay ,  Stephen E. Hannah ,  Jesse M. James

    IPC: H04B1/04

    CPC classification number: H04B1/04 ,  H01Q1/1221 ,  H01Q1/125

    Abstract: An embodiment of a light powered transmitter configured for broadcasting an electromagnetic control field to a region is provided. The transmitter includes a housing having a longitudinal axis. The housing includes a photovoltaic cell configured to generate electrical power in response to light and a rechargeable power source configured to store at least a portion of the power generated by the photovoltaic cell. The housing also includes an electromagnetic transmitter and a directional antenna. The directional antenna can be configured to broadcast an electromagnetic (e.g., radio-frequency) control field to a region. The directional antenna can be rotatably mounted in the housing such that the antenna can be rotated around the longitudinal axis. The housing can further include a transparent or translucent optical element configured to receive the light and converge at least a portion of the light onto the photovoltaic cell.

    Abstract translation: 提供了一种被配置为将电磁控制场广播到区域的光功率发射器的实施例。 发射器包括具有纵向轴线的壳体。 壳体包括被配置为响应于光产生电力的光伏电池和被配置为存储由光伏电池产生的功率的至少一部分的可再充电电源。 壳体还包括电磁发射器和定向天线。 定向天线可以被配置为向一个区域广播电磁（例如，射频）控制字段。 定向天线可以可旋转地安装在壳体中，使得天线能够围绕纵向轴线旋转。 壳体还可以包括被配置为接收光并将至少一部分光聚光到光伏电池上的透明或半透明光学元件。

    LOOP ANTENNA FIXTURES AND METHODS
    10.
    发明申请
    LOOP ANTENNA FIXTURES AND METHODS 审中-公开
    LOOP天线设备和方法

    公开(公告)号：US20160268688A1

    公开(公告)日：2016-09-15

    申请号：US15160289

    申请日：2016-05-20

    Applicant: Gatekeeper Systems, Inc.

    Inventor： John C. McKay ,  Jesse M. James ,  Stephen E. Hannah

    IPC: H01Q7/00 ,  H01Q1/14 ,  H01Q1/42

    CPC classification number: H01Q7/00 ,  H01Q1/12 ,  H01Q1/14 ,  H01Q1/42

    Abstract: Various loop antenna fixture embodiments are disclosed. The fixture can be configured to removably attach with other fixtures, thus changing the overall dimensions of an antenna wrapped around the periphery of the fixture or fixtures. Advantageously, after the antenna is wrapped around the fixture(s) to form an assembly, the entire assembly can be removed and installed without the requirement of removing the antenna from the fixture(s).

    Abstract translation: 公开了各种环形天线固定装置的实施例。 固定装置可以被配置成可拆卸地与其它固定装置连接，从而改变围绕固定装置或固定装置的周边缠绕的天线的总体尺寸。 有利地，在将天线缠绕在固定装置上以形成组件之后，整个组件可以被移除和安装，而不需要将固定装置移除天线。

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