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公开(公告)号：US4196655A
公开(公告)日：1980-04-08
申请号：US648372
申请日：1976-01-12
摘要： A fluid motor and more particularly a fluid motor having an improved piston head structure.
摘要翻译： 一种流体马达，特别是具有改进的活塞头结构的流体马达。
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公开(公告)号：US5040618A
公开(公告)日：1991-08-20
申请号：US566112
申请日：1990-08-13
CPC分类号： E21B6/00 , B25D17/265 , B25D9/14
摘要： A pneumatic rock drill which has a pneumatic percussion unit with a piston which slidably engages the cylinder in which it reciprocates. Preferably clearances of less than less than about 0.00125 inches per inch of piston diameter and greater than about 0.00075 inches where clearances are diameter are maintained to assure a fluid film between the piston and the cylinder wall. The clearances are based on diameters. The piston of the pneumatic drill has at least one stem section which slidably engages a distributor.The rock drill has a pneumatic motor connected to the percussion unit and engages a distributor of the percussion unit. A air motor gear in the pneumatic motor is rotatably mounted on the distributor.The exhaust is employed to lubricate the bearings and gearing which turn the striker bar.
摘要翻译： 一种气动凿岩机，其具有气动冲击单元，其具有可滑动地接合其中往复运动的气缸的活塞。 优选地，保持小于小于约0.00125英寸/英寸活塞直径和大于约0.00075英寸的间隙，其中间隙为直径，以确保活塞和气缸壁之间的流体膜。 间隙基于直径。 气动钻具的活塞具有至少一个可滑动地接合分配器的杆部分。 凿岩机具有连接到冲击单元的气动马达并与冲击单元的分配器接合。 气动马达中的空气马达齿轮可旋转地安装在分配器上。 排气用于润滑转动撞杆的轴承和齿轮。
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公开(公告)号：US4957171A
公开(公告)日：1990-09-18
申请号：US341777
申请日：1989-04-24
CPC分类号： E21B6/00 , B25D17/265 , B25D9/14
摘要： A pneumatic rock drill which has a pneumatic percussion unit with a piston which slidably engages the cylinder in which it reciprocates. Preferably clearances of less than less than about 0.00125 inches per inch of piston diameter and greater than about 0.00075 inches where clearances are diameter are maintained to assure a fluid film between the piston and the cylinder wall. The clearances are based on diameters. The piston of the pneumatic drill has at least one stem section which slidably engages a distributor. The rock drill has a pneumatic motor connected to the percussion unit and engages a distributor of the percussion unit. An air motor gear in the pneumatic motor is rotatably mounted on the distributor. The exhaust is employed to lubricate the bearings and gearing which turn the striker bar.
摘要翻译： 一种气动凿岩机，其具有气动冲击单元，其具有可滑动地接合其中往复运动的气缸的活塞。 优选地，保持小于小于约0.00125英寸/英寸活塞直径和大于约0.00075英寸的间隙，其中间隙为直径，以确保活塞和气缸壁之间的流体膜。 间隙基于直径。 气动钻具的活塞具有至少一个可滑动地接合分配器的杆部分。 凿岩机具有连接到冲击单元的气动马达并与冲击单元的分配器接合。 气动马达中的空气马达齿轮可旋转地安装在分配器上。 排气用于润滑转动撞杆的轴承和齿轮。
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