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11. 发明授权

US4205737A Clutch-brake mechanism for rotary mower engines 失效
标题翻译：旋转割草机的离合器制动机构
公开(公告)号：US4205737A
公开(公告)日：1980-06-03
申请号：US830116
申请日：1977-09-02
申请人： Joseph R. Harkness , Robert K. Mitchell
发明人： Joseph R. Harkness , Robert K. Mitchell
IPC分类号： A01D34/68 , F16D67/02 , A01D69/10
CPC分类号： A01D34/6812 , F16D67/02 , A01D2101/00
摘要： A completely enclosed combination clutch and brake mechanism permanently mounted at the bottom of a vertical shaft internal combustion engine of the type used to power rotary lawn mowers, is interposed between the crankshaft of the engine and a coaxial blade shaft projecting down from the bottom of the enclosed clutch and brake mechanism to have the cutting blade of the mower fixed thereto. A rotatable driving member fixed to the engine crankshaft and a rotatable driven member fixed to the blade shaft are drivingly coupled by radially outwardly movable clutch elements carried by the driven member and frictionally engaged with a radially inwardly facing circular surface on the driving member. Such frictional engagement results from the application to the clutch elements of both spring force and centrifugal force. The spring-force-produced frictional engagement effects transmission of rotation to the driven member from stand still to the speed at which the centrifugal-force-produced frictional engagement is capable of transmitting full engine torque to the blade shaft, but is incapable--due to slippage--of stopping the engine when the brake is applied, in which event rotation of the driven member is rapidly decelerated to zero.
摘要翻译：永久安装在用于动力旋转割草机的立式轴内燃机的底部的完全封闭的组合式离合器和制动机构插入在发动机的曲轴和从底部的下方突出的同轴叶片轴之间封闭离合器和制动机构，使割草机的切割刀片固定在其上。固定到发动机曲轴的可旋转驱动构件和固定到叶片轴的可旋转从动构件通过由从动构件承载的径向向外可动的离合器元件驱动耦合，并与驱动构件上的径向向内的圆形表面摩擦接合。这种摩擦接合是由于弹簧力和离心力两者都适用于离合元件。弹簧力产生的摩擦接合影响从静止位置到从动构件的旋转传递到离心力产生的摩擦接合能够将全发动机扭矩传递到叶片轴的速度，但是由于当制动器被施加时停止发动机的滑动，此时从动构件的旋转迅速减速到零。

12. 发明授权

US4090345A Brake safety system for a power driven rotary mower 失效
标题翻译：电动旋转割草机的制动安全系统
公开(公告)号：US4090345A
公开(公告)日：1978-05-23
申请号：US741732
申请日：1976-11-15
申请人： Joseph R. Harkness
发明人： Joseph R. Harkness
IPC分类号： A01D34/68 , A01D69/10
CPC分类号： A01D34/6812 , A01D69/10 , A01D2101/00
摘要： An engine powered rotary lawn mower has a brake which upon being engaged stops the engine crankshaft and the cutter blade fixed thereto. A deadman control on the handle of the mower, upon being moved partway to the "run" position in which it must be held to enable operation of the mower, disengages the brake. A manually activated gravity deactivated latch holds the deadman control in brake-off position to enable starting the engine, until the deadman control is moved all the way to the "run" position whereupon gravity deactivates the brake.
摘要翻译：发动机驱动的旋转割草机具有制动器，其在接合时停止发动机曲轴和固定到其上的切割刀片。在割草机手柄上的一个死者控制，在被中途移动到必须保持的“行驶”位置以使割草机能够操作时，使制动器脱开。手动启动的重力停用闩锁将死机控制保持在制动器关闭位置，以启动发动机，直到死机控制完全移动到“行驶”位置，从而重力使制动器停用。

13. 发明授权

US4048788A Rotary power mower with improved clutch and brake mechanism 失效
标题翻译：旋转割草机具有改进的离合器和制动机构
公开(公告)号：US4048788A
公开(公告)日：1977-09-20
申请号：US703843
申请日：1976-07-09
申请人： Igor Kamlukin , Joseph R. Harkness
发明人： Igor Kamlukin , Joseph R. Harkness
IPC分类号： A01D34/68 , F16D67/02 , A01D69/08
CPC分类号： A01D34/6812 , F16D67/02 , A01D2101/00 , Y10S56/04
摘要： A rotary power mower in which the cutter blade is fixed to the bottom of a cup-shaped rotor, freely rotatably suspended from a carriage that is slidably mounted for fore and aft movement beneath the deck of the mower chassis. The carriage is spring-urged to a position in which the outer face of the side wall of the cup-shaped rotor is frictionally engaged with a brake shoe fixedly carried by the mower chassis, to hold the cutter blade against turning; and a deadman control mounted on the handle of the mower and operatively connected with the carriage enables the operator to move the carriage against the force of the spring to a position in which the inner face of the side wall of the cup-shaped rotor is tangent to and frictionally engaged with the periphery of a drive wheel fixed to the engine drive shaft.
摘要翻译：一种旋转割草机，其中切割刀片固定到杯形转子的底部，可自由旋转地悬挂在可滑动地安装用于在割草机底盘的甲板下方前后运动的托架上。托架被弹簧推动到杯形转子的侧壁的外表面与由割草机底盘固定承载的制动瓦片摩擦接合的位置，以保持切割刀片不转动; 并且安装在割草机的手柄上并与滑架可操作地连接的止动器控制使得操作者能够抵抗弹簧的力将托架移动到杯形转子的侧壁的内表面相切的位置与固定在发动机驱动轴上的驱动轮的周边摩擦接合。

14. 发明授权

US3981289A Automatic compression relief mechanism for internal combustion engines 失效
标题翻译：内燃机自动压缩释放机构
公开(公告)号：US3981289A
公开(公告)日：1976-09-21
申请号：US558251
申请日：1975-03-14
申请人： Joseph R. Harkness
发明人： Joseph R. Harkness
IPC分类号： F01L13/08 , F02B1/04 , F02N19/00
CPC分类号： F02N19/004 , F01L13/08 , F02B1/04
摘要： In an internal combustion engine, a latch member is movable to and from a latching position in which it prevents a valve from coming nearer its seat than a predetermined distance therefrom. A cam follower connected with the latch member cooperates with axially adjacent first and second cam elements. The first causes the latch member to be held out of latching position during most of the engine cycle at all speeds, but at cranking speeds causes it to move to latching position just before the valve, in closing, reaches said distance from its seat. Once in latching position, the latch member is trapped there until opening movement of the valve carries it beyond said distance from its seat. The second cam element, carried by a flyweight, so cooperates with the first at running speeds as to hold the latch member out of latching position throughout the cycle.
摘要翻译：在内燃机中，闩锁构件可移动到闩锁位置并且从闩锁位置移动，在闩锁位置中，阻止阀门比其距离预定距离更靠近阀座。与闩锁构件连接的凸轮从动件与轴向相邻的第一和第二凸轮元件协作。首先使得闩锁构件在大多数发动机循环期间以所有速度被保持在闩锁位置之外，但是在起动速度下使得其在阀门之前关闭时移动到闭锁位置，从而使其从座椅到达所述距离。一旦处于闩锁位置，闩锁构件被捕获在那里，直到阀的打开运动将其超过与其座椅相距的距离。第二个凸轮元件由一个轻量级承载，因此以一个运行速度与第一个凸轮元件协同工作，以便在整个循环中将闩锁件保持在锁定位置之外。

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