Patent International Class: B23Q 5/33
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Percussive drill with adjustable flow control
Inventor: Lyon, et al. | Patent Number: 6799641
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Hydraulic driven tool controlling apparatus
Inventor: Shimada, et al. | Patent Number: 6053258
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Porting system for back chamber of pneumatic hammer
Inventor: Pascale | Patent Number: 5984021
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Clamp including resilient internal link
Inventor: Horn | Patent Number: 5676357
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Hydraulic control circuit for pile driver
Inventor: Evarts | Patent Number: 5529132
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Hydraulic control circuit for pile driver
Inventor: Evarts | Patent Number: 5474138
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Pneumatic hammer
Inventor: Klemm | Patent Number: 5350023
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Reversible casing for a down-the-hole percussive apparatus
Inventor: Lay, et al. | Patent Number: 5325926
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Fluid powered cutting tool
Inventor: Wells | Patent Number: 5218767
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Porting system for pneumatic impact hammer
Inventor: Pascale | Patent Number: 5205363
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High efficiency pneumatic impacting mechanism with a plunger valve
Inventor: Dang | Patent Number: 5199504
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Percussion device
Inventor: Erlach | Patent Number: 5161623
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Down hole percussion drill apparatus
Inventor: Harrington | Patent Number: 5131476
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Slip assembly
Inventor: Cox | Patent Number: 5027926
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Slip assembly
Inventor: Cox | Patent Number: 4940118
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Impact apparatus
Inventor: Ericsson | Patent Number: 4846287
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Vacuum-compression type percussion power tool with an auxiliary chamber
Inventor: Pyatov | Patent Number: 4828046
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Vacuum-compression type percussion power tool with an auxiliary chamber
Inventor: Pyatov | Patent Number: 4828046
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Vacuum-compression type percussion power tool
Inventor: Pyatov | Patent Number: 4823886
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Vacuum-compression type percussion power tool
Inventor: Pyatov | Patent Number: 4823886
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Valveless down-the-hole drill
Inventor: Sweeny | Patent Number: 4790390
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Machine tool comprising a tool driven in the axial direction by a hydraulic lifting cylinder, in particular a gear shaper machine
Inventor: Feuser | Patent Number: 4786218
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Method and device for percussion earth drilling
Inventor: Noren | Patent Number: 4699223
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Earth auger
Inventor: Akesaka | Patent Number: 4691787
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Hydraulically actuated slip assembly
Inventor: Cox | Patent Number: 4576254
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Porting system for pneumatic impact hammer
Inventor: Toutant | Patent Number: 4530408
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Pipe gripping apparatus with interlocking plates
Inventor: Baugh, et al. | Patent Number: 4478292
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Device for reciprocating motion of a rotating drilling body of a drilling machine
Inventor: Lagerstedt, et al. | Patent Number: 4456077
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Hydraulic control system for a rock drill
Inventor: Shiihara, et al. | Patent Number: 4440236
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Reversing mechanism for the direction of rotation in a drilling apparatus
Inventor: Tienari | Patent Number: 4399876
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Cephem derivatives
Inventor: Durckheimer, et al. | Patent Number: 4399131
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Drilling installation, more specifically for oil-drilling operations
Inventor: Gallon | Patent Number: 4375241
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Drill
Inventor: Lapointe | Patent Number: 4351399
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Raise drill apparatus
Inventor: Winsor | Patent Number: 4315552
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Impact device
Inventor: Vikhlyaev, et al. | Patent Number: 4308922
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Safety device for rotary earth drilling apparatus
Inventor: Weber | Patent Number: 4303132
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Cable tensioner for a downcrowding device for earth boring machines
Inventor: Griste | Patent Number: 4296819
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Force application apparatus, especially for severing materials
Inventor: Spengler | Patent Number: 4277996
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Automatic control system for rock drills
Inventor: Schivley, Jr., et al. | Patent Number: 4275793
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Torquer/thruster
Inventor: Blanz | Patent Number: 4273199
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Power slip assembly
Inventor: Baugh | Patent Number: 4269277
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Torquer/thruster
Inventor: Blanz | Patent Number: 4262756
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Torquer/thruster
Inventor: Blanz | Patent Number: 4262756
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Feed beam
Inventor: Jonsson | Patent Number: 4207805
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Quill drive with variable feed
Inventor: Evans | Patent Number: 4201271
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Apparatus for measuring and controlling a force
Inventor: Weiner, et al. | Patent Number: 4199032
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Torquer/thruster for flexible roofdrill
Inventor: Hug | Patent Number: 4128133
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Spindle structure for gear shaping machine or the like
Inventor: Tlaker, et al. | Patent Number: 4125056
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Hand-size fluid-powered tool reciprocator
Inventor: Sanders | Patent Number: 4016941