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1. 发明授权

US5857439A Controlled noise portable power unit for operating a tool 失效
标题翻译：用于操作工具的控制噪声便携式电源单元
公开(公告)号：US5857439A
公开(公告)日：1999-01-12
申请号：US862097
申请日：1997-05-22
申请人： Lawrence N. Will , Mark Smolenski
发明人： Lawrence N. Will , Mark Smolenski
IPC分类号： F02B63/00 , A47L5/36 , A47L9/00 , F02B63/02 , F02B77/13 , F02M31/00
CPC分类号： F02B63/02 , A47L5/36 , A47L9/0081
摘要： A portable power unit for operating a tool is provided and includes a frame adapted to be carried on the back of an operator to orient the power unit in a the predetermined operating position with the operator standing upright. The power unit further includes an engine mounted on the frame for powering a tool, a fan mounted between the frame and the engine, a fan intake positioned between the frame and the fan, and structure for attenuating engine and fan generated noise and for inhibiting the emanation of engine and fan generated noise in horizontal directions from the power unit with the power unit in the operating position.
摘要翻译：提供了用于操作工具的便携式动力单元，并且包括适于承载在操作者的背面上的框架，以使操作者站立直立时将动力单元定向在预定操作位置。动力单元还包括安装在框架上用于为工具供电的发动机，安装在框架和发动机之间的风扇，位于框架和风扇之间的风扇进气口，以及用于衰减发动机和风扇产生的噪声并用于抑制发动机和发电机在水平方向产生的噪声从动力单元的动力单元处于工作位置。

2. 发明授权

US5284122A Anti-icing heater for an engine carburetor 失效
标题翻译：用于发动机化油器的防冰加热器
公开(公告)号：US5284122A
公开(公告)日：1994-02-08
申请号：US027299
申请日：1993-03-04
申请人： Lawrence N. Will , James L. King
发明人： Lawrence N. Will , James L. King
IPC分类号： F02B1/04 , F02M15/04 , F02M31/04 , F02M31/13 , F02M23/14
CPC分类号： F02M31/042 , F02M15/04 , F02M31/13 , F02B1/04 , Y02T10/126 , Y10S261/20
摘要： An internal combustion engine has a carburetor for mixing fuel with air entering through an inlet. A heat exchanger is mounted onto the carburetor air inlet so that heat from the heat exchanger is conducted to the carburetor housing. The heat exchanger has a plurality of channels through which air from an air cleaner pass on the way to the carburetor. An electric heating device attached to said heat exchanger and a first thermostat controls the electric heating device to raise the temperature of the heat exchanger when the fuel-air mixture falls below a given temperature. A second thermostat senses the temperature of the heat exchanger and prevents the temperature from exceeding a level at which a user's skin will blister if the exchanger is touched accidentally. In cold operating environments, the heat exchanger assembly raises the temperature of the air above the dew point, thus effectively lowering the relative humidity. The carburetor also is heated so that water vapor in the air will not condense on the surfaces of the carburetor. This prevents accumulation of water which can freeze and affect the operation of the carburetor.
摘要翻译：内燃机具有用于将燃料与通过入口进入的空气混合的化油器。换热器安装在化油器进气口上，使得热交换器的热量传导到化油器外壳。热交换器具有多个通道，来自空气净化器的空气通过该通道在通向化油器的路上通过。附接到所述热交换器的电加热装置和第一恒温器控制电加热装置以在燃料 - 空气混合物低于给定温度时升高热交换器的温度。第二个恒温器检测热交换器的温度，并防止温度超过用户的皮肤会发生水泡的程度，如果交换机被意外触摸。在冷运行环境中，热交换器组件将空气的温度升高到露点以上，从而有效降低相对湿度。化油器也被加热，使得空气中的水蒸气不会在化油器的表面上冷凝。这样可以防止积水，从而冻结并影响化油器的运行。

3. 发明授权

US5867910A Control for portable power tool 失效
标题翻译：便携式电动工具的控制
公开(公告)号：US5867910A
公开(公告)日：1999-02-09
申请号：US779573
申请日：1997-01-07
申请人： Robert Stegall , Lawrence N. Will , William Kalnins
发明人： Robert Stegall , Lawrence N. Will , William Kalnins
IPC分类号： A01G3/04 , A01D34/10 , A01G3/053 , B25F5/02 , B26B7/00 , B26B19/38
CPC分类号： A01G3/053 , B25F5/026
摘要： A portable tool including a frame, a working element on the frame and a power unit for operating the working element. A switch on the frame switches between a first state, e.g., stop operation, and a second state, e.g., running operation. An actuator on the frame is repositionable relative to the frame to selectively change the switch from its first state into its second state and in a first path to change the switch from its first state into its second state. The actuator is mounted for movement relative to the frame in a second path that is different than the first path to change the switch from its first state into its second state.
摘要翻译：一种便携式工具，包括框架，框架上的工作元件和用于操作工作元件的动力单元。帧上的开关在第一状态（例如停止操作）和第二状态（例如运行操作）之间切换。框架上的致动器可相对于框架重新定位，以选择性地将开关从其第一状态改变到其第二状态，并且在第一路径中将开关从其第一状态改变到其第二状态。致动器被安装成在与第一路径不同的第二路径中相对于框架移动，以将开关从其第一状态改变到其第二状态。

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