Recreational vehicle water heater having centrally controlled gas and
electric power sources
    2.
    发明授权
    Recreational vehicle water heater having centrally controlled gas and electric power sources 失效
    休闲车用热水器具有集中控制的气源和电源

    公开(公告)号:US5960157A

    公开(公告)日:1999-09-28

    申请号:US977919

    申请日:1997-11-25

    申请人: John F. McGraw

    发明人: John F. McGraw

    摘要: A water heater for a recreational vehicle which employs both gas and electric powered system for heating the water within the water heater, wherein both the gas powered and electric powered systems are controlled through a single user interface control. The present invention provides a water heater for a recreational vehicle wherein a hot surface ignition system is used in conjunction with the gas burner and the electric resistance coil is immersed within the water such that either gas stored on board the recreational vehicle, or land-based electrical power can be used to heat the water either independently or in combination. Through the use of a single temperature sensor, and a single operator control, the water can be most efficiently brought up to the appropriate temperature in the most convenient manner for the user. Moreover, the present invention includes a built-in safety system, which does not require a separate energy cut-off switch, to insure that the water within the tank will not rise above an unacceptably safe temperature.

    摘要翻译: 一种用于娱乐车辆的热水器,其采用气体和电动系统来加热热水器内的水,其中气体供电和电动系统都通过单个用户界面控制来控制。 本发明提供了一种用于休闲车辆的热水器,其中热表面点火系统与气体燃烧器结合使用,并且电阻线圈浸入水中,使得存储在休闲车辆上的任何气体或陆上 电力可以独立地或组合地用于加热水。 通过使用单个温度传感器和单个操作员控制,用户可以以最方便的方式将水最有效地提升到适当的温度。 此外,本发明包括内置的安全系统,其不需要单独的能量截止开关,以确保罐内的水不会升高到不可接受的安全温度以上。

    Hot work tool steel with good temper resistance
    3.
    发明授权
    Hot work tool steel with good temper resistance 失效
    耐热工具钢,耐回火性好

    公开(公告)号:US4886640A

    公开(公告)日:1989-12-12

    申请号:US234901

    申请日:1988-08-22

    IPC分类号: C22C38/22 C22C38/24

    CPC分类号: C22C38/22 C22C38/24

    摘要: An improved hot work tool steel has higher hardness capability and better temper resistance above 1100 F. and better wear resistance than AISI type H13 and better toughness and ductility then AISI type H10 or type H21. The steel alloy contains essentially the following in weight percent:______________________________________ Carbon 0.55 Max. Manganese 1.5 Max. Silicon 2.0 Max. Chromium 3.5-6.0 Molybdenum 1.5-3.0 Vanadium 0.50-1.50 ______________________________________ and the balance is essentially iron except for the usual impurities found in commerical grades of hot work tool steels. Carbon and chromium are balanced within the composition such that% carbon.gtoreq.0.098.times.% chromium.

    摘要翻译: 改进的热加工工具钢具有较高的硬度能力和高于1100°F的较好的回火韧性,耐磨性能优于AISI型H13,而且具有更好的韧性和延展性,然后AISI型H10或H21型。 钢合金基本上含有以下重量百分比: - 碳0.55最大。 - 锰1.5最大 - 硅2.0最大 - 铬3.5-6.0 - 钼1.5-3.0 - 钒0.50-1.50 - 余量基本上是铁,除了在工作级别的热作工具钢中发现的常见杂质。 碳和铬在组合物中是平衡的,使得%碳= 0.098x%的铬。