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61. 发明专利

CA1248082A POWER DRIVEN GOLF HOLE CUTTING APPARATUS 未知
公开(公告)号：CA1248082A
公开(公告)日：1989-01-03
申请号：CA540787
申请日：1987-06-29
申请人： MARROW BRETT , HARRIS JIM
发明人： MARROW BRETT , HARRIS JIM
IPC分类号： A63B57/50 , A01C5/04 , A63B57/40 , E21C3/06
摘要： There is provided a new and useful power driven golf hole cutting apparatus comprising an engine, an elongated shaft having first and second ends and operatively connected at or near the first end with the engine to be driven in rotation by the engine, and a cutter head operatively connected to the second end of the shaft whereby the head is driven in rotation by the shaft, the cutter head comprising a somewhat elongated cylindrical member having upper and open lower ends and the outside diameter of which member approximates the inside diameter of a golf hole. A plunger arrangement is provided for removing a turf plug from the cutter head.

62. 发明专利

DE3505544A1 Hammer drill 未知
公开(公告)号：DE3505544A1
公开(公告)日：1986-08-21
申请号：DE3505544
申请日：1985-02-18
申请人： HILTI AG
发明人： BRIX PETER
IPC分类号： B25D11/00 , B25D16/00 , E21C3/06 , B25D11/12 , B28D1/14
摘要： The hammer drill (1) has a striking element (11) which is set in reciprocating movement by a piston (13) via an air cushion or a spring element. To perform a stroke movement, the piston (13) is connected to a connecting rod (14) which is driven by the crank (16). The crank (16) has a crankpin (17) inclined at an acute angle to its axis of rotation. To change the piston stroke, the crank (16) is displaced along the axis of rotation, as a result of which the effective crank radius of the crankpin (17) is adjusted.

68. 发明专利

DE2751506A1 Rotary and impact drill ratchet mechanism - has ring with teeth sloping at 20 degrees and flanks at 45 degrees 未知
公开(公告)号：DE2751506A1
公开(公告)日：1979-05-23
申请号：DE2751506
申请日：1977-11-18
申请人： LICENTIA GMBH
发明人： STILTZ ERWIN DIPL ING
IPC分类号： E21B6/06 , E21C3/06
摘要： The rotary and impact drill has a ratchet mechanism which includes a stopped sleeve (3) with a ring of ratchet teeth (2) at one end, on a face at right angles to its axis of rotation. This sleeve is designed for rotation in either direction. The contact face (4) of each tooth slopes at an angle of about 10 deg. to the vertical face, and the flank (1) slopes at an angle of 45 deg..

70. 发明专利

FR2340444A1 未知
公开(公告)号：FR2340444A1
公开(公告)日：1977-09-02
申请号：FR7703461
申请日：1977-02-08
申请人： REED TOOL CO
IPC分类号： E21B4/10 , E21B4/14 , E21B1/06 , E21B5/00 , B25D9/14 , E21C1/12 , E21C3/06
摘要： An impact drilling tool for rotary drilling which includes a reciprocating hammer inside a casing for striking the top of an anvil. A drilling bit is connected to the opposite end of the anvil for cutting into the earth's formations. The casing is connected in a string of drilling pipe through which a high pressure fluid flows for operating the hammer and removing cuttings. A feeder means extends through the hammer for alternately directing the high pressure fluid above and below the hammer which high pressure fluid causes the reciprocating motion of the hammer. A shuttle valve located around the feeder maintains communication of the high pressure fluid above the hammer for increased effective stroke to insure a harder driving action of the hammer against the anvil. Also the shuttle valve insures a more complete exhaust above the hammer which reduces the force needed to raise the hammer. In alternative embodiments, the shuttle may control only one of the exhaust or pressurization functions.

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