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21. 发明授权

US4694594A Single stage snowthrower 失效
标题翻译：单级积雪车
公开(公告)号：US4694594A
公开(公告)日：1987-09-22
申请号：US775288
申请日：1985-09-12
申请人： Richard A. Thorud , Donald M. White, III
发明人： Richard A. Thorud , Donald M. White, III
IPC分类号： E01H5/04 , E01H5/09
CPC分类号： E01H5/04 , E01H5/098
摘要： An improved single stage snowthrower (2) includes an open front portion (14) having a rotatable impeller (30) contained therein. Impeller (30) contains at least one outwardly extending paddle (32) having a complex curved shape. Paddle (32) includes a central snowthrowing section (34) which is curved forwardly from its midpoint to each side thereof to be concave with this central section (34) extending over at least the middle 50 percent of the entire paddle's length. Two end sections (36) fill out the remaining length of paddle (32) and are shaped to function as augers for moving a relatively small volume of snow inwardly onto the central snowthrowing section (34). Improved impeller (30) can be used with an inverted funnel-shaped collecting chamber (22) located in the rear wall (18) of front portion (14) of snowthrower (2). Collecting chamber (22) is sized and shaped to approximate the size and shape of the inwardly tapered stream which is thrown off central section (34).
摘要翻译：改进的单级打雪车（2）包括其中容纳有可旋转的叶轮（30）的敞开的前部（14）。叶轮（30）包含具有复杂弯曲形状的至少一个向外延伸的桨叶（32）。桨（32）包括中心的积雪部分（34），其从其中点向其每侧向前弯曲成凹入，该中心部分（34）延伸至整个桨叶长度的至少中间部分的50％。两个端部部分（36）填充桨叶（32）的剩余长度，并且成形为用作将相对较小体积的雪向内移动到中央制冰部分（34）上的螺旋推运器。改进的叶轮（30）可以与位于推雪车（2）的前部（14）的后壁（18）中的倒置的漏斗状收集室（22）一起使用。收集室（22）的尺寸和形状被设计成近似从中心部分（34）抛出的向内锥形流的大小和形状。

22. 发明授权

US4412382A Line feed mechanism for filament cutting 失效
标题翻译：线切割的送丝机构
公开(公告)号：US4412382A
公开(公告)日：1983-11-01
申请号：US260450
申请日：1981-05-04
申请人： Donald M. White, III
发明人： Donald M. White, III
IPC分类号： B65H49/18 , A01D34/416 , A01D34/73 , B65H75/42 , B26D1/12
CPC分类号： A01D34/4163
摘要： An indexing mechanism (10) for a filament line vegetation cutting device (12) comprises a spool (34) fixed to a drive shaft (22). Enclosure (62) surrounds spool (34) and has a grommet (82) for guiding a filament line (2) contained on spool (34). A spider (64) has upstanding members (68) and is contained in enclosure (62) for rotation therewith. Upstanding members (68) are selectively engaged with teeth (54) on spool (34) for driving enclosure (62) synchronously with spool (34). Members (68) disengage teeth (54) to allow a line indexing action to occur by virtue of radially inward movement of members (68) in response to bumping enclosure (62) on the ground.
摘要翻译：用于丝线植被切割装置（12）的分度机构（10）包括固定到驱动轴（22）的卷轴（34）。外壳（62）围绕卷轴（34）并且具有用于引导容纳在卷轴（34）上的细丝线（2）的索环（82）。蜘蛛（64）具有直立构件（68）并且容纳在外壳（62）中以与其一起旋转。直立构件（68）选择性地与卷轴（34）上的齿（54）接合，以与卷轴（34）同步地驱动外壳（62）。构件68脱离齿54以允许由于构件（68）响应于地面上的碰撞外壳（62）的径向向内运动而发生线路分度作用。

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