Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7351012 | Rotational drive apparatus for screw pilings A rotational drive apparatus for screw pilings is described. The apparatus comprises a housing having a cylindrical pipe coupling adapted to receive a shaft of a screw piling therethrough. A detachable connecting element secures the coupling to the shaft at differen... | 04/01/2008 |
| 7347651 | Drilling device In order to improve a device (100) for a drilling machine (10) known per se for manual drilling with a casing (11), a grip (12), a tool chuck (13) and a tool (14), especially a drilling, reaming or counterboring tool, in suc... | 03/25/2008 |
| 7314098 | Apparatus for driving and extracting stakes A hand-held tool having a motor, a vibration mechanism, and a stake-gripping device is disclosed for driving and extracting stakes or posts. The vibration mechanism generally comprises a housing surrounding a pair of geared eccentric plates or geared weighted plates... | 01/01/2008 |
| 7284743 | Hoist limiting system A hoist limiting system (15) comprising a frame (16), a hoist drum (17) supported by the frame and rotatable about a hoist axis (x-x), a hoist driver (19) supported by the frame and configured to rotate the hoist drum in opposite upward (... | 10/23/2007 |
| 7237706 | Drop hammer Embodiments of the present invention pertain to a drop hammer comprising a load, an actuator connected to the load, and a fluid circuit that is connected to the actuator and is connectable to a fluid source, such as a source of hydraulic power. The fluid circuit is ... | 07/03/2007 |
| 6729525 | Structure of a two dimensional positioning nailing machine An improved structure of a two dimensional positioning nailing machine is disclosed, which has a body, a positioning member and at least one positioning rule, the improved structure characterized in that the positioning member is removably attached on the body, the ... | 05/04/2004 |
| 6550544 | Rock drilling device A rock drilling device has a feed beam (1) and a rock drilling machine (2) movable along the feed beam. The rock drilling machine is fed along the feed beam (1) by a feed line (7), which is routed over a sheave (6) arranged at the movable end (5) of a pre... | 04/22/2003 |
| 5673839 | Real-time fastener measurement system A real-time fastener measurement system includes an anvil (10) having a striking surface (16) that engages a fastener as it is upset. Three proximity sensors (20) are disposed at 120° intervals around a striking surface of the anvil. A computer system (1... | 10/07/1997 |
| 5667021 | Apparatus for driving grade stakes A grade stake driver includes a frame for supporting a hammer and a grade stake under the hammer. A shuttle secured to the hammer movably mounts onto the frame to connect the hammer to the frame. A hoist secured to the shuttle mounts onto the frame to per... | 09/16/1997 |
| 5601148 | Arrangement for measuring the position of a feed beam in a rock drilling apparatus and/or measuring the position of a rock drill An arrangement for measuring the position of a feed beam (1) in a rock drilling apparatus relative to a cradle (4) therein, or measuring the position of a rock drill (3) relative to the feed beam (1). In the arrangement an inelastic, flexible cogged belt ... | 02/11/1997 |
| 5484026 | Handheld electromotive tool with sensor A handheld electromotive tool capable of efficient execution of a floor board and a ceiling board is provided. The tool is used in combination with a beam emitting device for emitting a radiation beam in a reference plane, and is provided with a housing h... | 01/16/1996 |
| 5448914 | System for measuring the penetration depth of an elongated object into the ground System for measuring the penetration depth of an elongated object such as a pile, tube, sheet pile or drill into the ground, to be used in combination with an installation for bringing the elongated object into the ground for instance by pressing, hammeri... | 09/12/1995 |
| 4993500 | Automatic drive hammer system and method for use thereof An automatic drive hammer system includes an automatic drive hammer apparatus which is carried by a bucket pivotally mounted to a drill rig. The drive hammer apparatus may be pivoted in the bucket from an off-hole storage position to an on-hole loading/un... | 02/19/1991 |
| 4830119 | Top head drive cooling system A top head drive cooling system is provided for an earth drilling machine of the type having a mast, a top head drive assembly mounted for movement along the mast, a quill included in the top head drive assembly, and an electric motor for rotating the qui... | 05/16/1989 |
| 4817733 | Hydraulic pile driver In a hydraulic pile driver (10), the lifting cylinder (34) acting on the driving weight (12) has an attached position indicator (46, 50), which produces a signal corresponding to the momentary position of the piston rod (32) of the lifting cylinder (34). ... | 04/04/1989 |
| 4699223 | Method and device for percussion earth drilling In percussion drilling such as earth drilling, a hammer piston driven by pressure medium is axially reciprocally movable in a drill body to transfer impact energy to a drill shank connectable to a drill bit. The axial position of the drill shank in the dr... | 10/13/1987 |
| 4461015 | Digital depth indicator for earth drilling apparatus A digital depth indicator for rotary earth drills, and particularly auger type drills, operates from the means used to lower and raise the drill. The indicator operates from either the wire or cable of a wire line hoist auger or the hydraulic fluid flow i... | 07/17/1984 |
| 4394577 | Displacement measurement device and method At least two types of reflective or emissive materials are applied in alternating manner to a pile or other object to be moved. Ultraviolet energy is emitted toward the materials and reflections or emissions therefrom are received by appropriate detector ... | 07/19/1983 |
| 4387295 | Pneumatic penetration sensor for oil drilling A device for accurately measuring the position of a traveling block in a drilling rig or the like which is supported by means of a cable wrapped around a drum winch assembly. A pneumatic sensor coupled to the drum provides a predetermined number of output... | 06/07/1983 |
| 4354779 | Drilling tools A depth stop for a drilling tool comprises a rod 12 mounted on the tool body for sliding movement in directions parallel to the drilling movement, and a locking lever 15 pivotally mounted about a pivot boss 16 which projects at a substantially right angle... | 10/19/1982 |
| 4339946 | Hydraulic depth indicator for hydraulic drilling machines A hydraulically operated earth boring machine, improved with a flowmeter and indicator to show the instantaneous and the greatest depth of the drilling tool.... | 07/20/1982 |
| 4271475 | Apparatus for measuring the fall height of a pile driver ram An apparatus for automatically calculating the fall height of the ram of a pile driver is disclosed. The apparatus includes a device for converting the sound created by each blow of the pile driver ram into an electrical signal, a first circuit for conver... | 06/02/1981 |
| 4256422 | Drilling machine with a drilling stop In a drilling machine, a rod-like stop member is mounted on the machine housing for limiting the extent to which a tool held in the machine can drill into a receiving surface. A handle lever, fitted on the housing, releasably locks the stop member in the ... | 03/17/1981 |
| 4250971 | Particulate material intercepting arrangement for a hand-held tool A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is receive... | 02/17/1981 |
| 4246577 | Tool breakage detecting apparatus A tool breakage detecting apparatus is provided with a preset counter to be preset with a predetermined value. The content of the counter is subtracted one by one each time either one of a tool and a workpiece to be machined is moved a unit distance towar... | 01/20/1981 |
| 4207953 | Particulate material intercepting arrangement for a hand held tool A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is receive... | 06/17/1980 |
| 4172391 | Drill drive mechanism A drill drive mechanism is especially adapted to provide both rotational drive and axial feed for a drill of substantial diameter such as may be used for drilling holes for roof bolts in mine shafts. The drill shaft is made with a helical pattern of scrol... | 10/30/1979 |
| 4156467 | Well drilling system In a well drilling system, a drill bit is raised or lowered through formations surrounding a borehole in response to the movement of a cable onto and off of a drawworks drum. Magnetic markings are affixed to the drum, and a pair of sensors detect rotation... | 05/29/1979 |
| 4154307 | Pile driving system A pile driving system for driving piles into an underwater surface which comprises an elongated two-part housing having a casing disposed within the lower portion of the housing and movable with respect to the housing. The casing has a pile driving hammer... | 05/15/1979 |
| 4140347 | Fluid operated wall groove cutter A hand-held groove cutter, particularly for cutting grooves in concrete structures, comprises a movable carriage having wheels for rolling over the concrete structure, and a fluid-operated percussion hammer mounted on the carrier. The hammer includes a pi... | 02/20/1979 |
| 4113033 | Method and arrangement for positioning a working tool to a predetermined direction and/or a predetermined point A working implement such as a rock drilling apparatus is automatically positioned to predetermined positions and/or directions. Particularly, a drill bit is moved to an imaginary plane spaced from the surface to be worked upon completion of a drill hole b... | 09/12/1978 |
