Class 173/53 - HAMMER OR TOOL SHAFT RECIPROCATED BY GRIPPING MEANS WHICH RELEASE OR YIELD TO PERMIT ADVANCE

Subclass of Class 173 - Tool driving or impacting
Definition: Apparatus in which a hammer head or tool includes a rod
No. of patents: 39
Last issue date: 03/30/2010

Number	Title	Issue Date
7686098	Chain driven reciprocating hammer with work piece centering and clamping In accordance with the present invention, a chain driven reciprocating hammer is disclosed. The chain driven reciprocating hammer includes a chain system for lifting a ram to a drop point. The chain system includes a plurality of sprockets and a chain with at least ...	03/30/2010
7497273	Plug and play utility control modules A utility control device, such as a light socket, a switch or a plug socket, is designed with universal terminals so that when plugged into a pre-wired utility box (box socket), the terminals will make the proper electrical connections with the premises wiring. Syst...	03/03/2009
7407017	Locking mechanism The present invention relates to a method of securing a shaft at any point along its substantially vertical axis of movement, wherein the method includes a locking device that is moveable with respect to the shaft. The method is characterised by the step of moving t...	08/05/2008
7331405	Powered hammer device The present invention relates to a powered hammer device including: a hammer with at least a first and a second projection; at least one translation dog adapted to engage with said projections, and a drive mechanism capable of moving the translation dog substantiall...	02/19/2008
7325711	Electrically operated drive-in tool A drive-in tool drives in fastening elements and includes a driving ram and a drive unit. The driving ram is displaceably supported in a guide. The drive unit has a drive flywheel and a return device. The drive flywheel is set in rotation by an electric motor, and t...	02/05/2008
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
7073610	Downhole tool A downhole tool for generating a longitudinal mechanical load. In one embodiment, a downhole hammer is disclosed which is activated by applying a load on the hammer and supplying pressurizing fluid to the hammer. The hammer includes a shuttle valve and piston that a...	07/11/2006
7059423	Jackhammer system A jackhammer system for reducing the vibration and noise experienced by an operator of the jackhammer. The jackhammer system includes a housing, a chisel movably positioned within a lower neck of the housing, a pair of flywheels rotatably attached to a pair of suppo...	06/13/2006
7040362	Log splitter A log splitter comprising: a base; a lever having one end portion hingably attached to the base; a wedge slidably attached to a hinged end portion of the lever, to slidably reciprocate along the lever when the lever is swung; a log support for a cut log; and, an upp...	05/09/2006
6695071	Drill head assembly A drill head for holding a drill steel includes a drill housing having an internal cavity defined by an upper opening and a lower portion with a lower opening extending therethrough. The internal cavity includes a pair of concentric axially aligned sleeve...	02/24/2004
6675913	Core drilling method and apparatus A method and apparatus for core drilling of concrete by resiliently mounting a hammer drill to a drill press or similar support frame using a recoil spring to maintain a driving force on the hammer drill. An air blower is positioned adjacent the core dril...	01/13/2004
6578643	Pneumatic ratchet drive wrench A pneumatic ratchet drive wrench of the present invention includes a pair of single springs that each bias a corresponding pawl into engagement with an output member and inhibit counter-rotation of the output member opposite the corresponding pawl. The pa...	06/17/2003
6464519	Electrical extension cord with convertible plug and accommodating receptacle An electrical extension cord includes a male plug convertible between standard residential or blade-type plug elements and twist-lock blade elements, and a female receptacle plug designed to accommodate both standard and twist-lock male plugs. The male pl...	10/15/2002
6378624	Draw vice A draw vice includes a body having two handles, a center tube mounted in the body and driven to rotate a workpiece, a center tube rotating device pivoted to the body and controlled to rotate the center tube, and a center tube locking device adapted to loc...	04/30/2002
6368023	Jack-in piling systems' apparatus and their method of use A pile driving apparatus for jack-in piling system according to the invention utilises two hydraulic cylinder barrels moving along two vertical support structures. An uppermost horizontal member is employed to maintain a working space in between the two v...	04/09/2002
6227306	Pipe gripping device A pipe gripping device is taught which is useful for moving pipe into and/or out of a well. The pipe gripping device includes a first set of slips for holding a pipe in a pipe light condition and a second set of slips for holding a pipe in a pipe heavy co...	05/08/2001
6199641	Pipe gripping device A pipe gripping device is taught which is useful for moving pipe into and/or out of a well. The pipe gripping device includes a first set of slips for holding a pipe in a pipe light condition and a second set of slips for holding a pipe in a pipe heavy co...	03/13/2001
5765651	Cable-tool casing hammer A novel improvement in a tubular ram device for bi-directional driving of pipe casing, vertically or horizontally, wherein the driving hammer imparts the force to the pipe casing through a bowls-anvil and removable collet, thus allowing driving of section...	06/16/1998
5462126	Ground rod driver An ground rod driver including a tubular ground rod receiver engaging a prime mover at one end and having a ratcheting ground rod driving member and a clamping setscrew disposed at an opposite end wherein a ground rod may be inserted, clamped at an initia...	10/31/1995
5174386	Ground rod driving apparatus A ground rod driver has a housing with upper and lower ends, and inlets and outlets for hydraulic fluid. A check assembly in the housing adjacent its lower end includes a chuck with a central bore and a multiplicity of chuck jaws slidably seated in the bo...	12/29/1992
5161625	Pile driving apparatus A pile driving apparatus comprises a base frame (1) having a platform (3) for supporting ballast (5). The base frame (1) is equipped with a leveling device (7). The pile driving apparatus comprises a column (11) positioned perpendicular with respect to th...	11/10/1992
5098004	Fastener driving tool A lightweight fastener driving tool capable of being battery powered utilizes a low cost fastener driving ram or blade that is normally located in a nip defined between a motor driven flywheel and an idler wheel. Upon the actuation of a trigger operated t...	03/24/1992
5012873	Device for forcing a reflective highway post into the ground A mobile device for forcing a highway post into the ground in the vertical position, especially where the highway post is flexible and made of fiberglass, which involves a vertical column spaced from and supported by the mobile device, guide means mounted...	05/07/1991
4964558	Electro-mechanical fastener driving tool An electromechanical flywheel containing fastener driving tool. The tool comprises a frame supporting a housing, a guide body and a fastener containing magazine. A free floating driver within said frame. Forward and rearward flywheels are arranged in tand...	10/23/1990
4955757	Hydraulic apparatus for installing piping below ground An under ground pipe installation apparatus includes a pair of spaced apart, longitudinally directed I-beams and a carriage slidable longitudinally along upper horizontal surfaces of the I-beams. A pair of hydraulic cylinders, one mounted with respect to ...	09/11/1990
4854492	Flywheel for an electromechanical fastener driving tool An improved flywheel for an electromechanical tool such as a nailer or stapler. The tool is provided with a blade-like driver which is frictionally moved through a working stroke by an electrically driven flywheel, the driver being squeezed between the fl...	08/08/1989
4747455	High impact device and method A high impact device, as for producing an impact of 1,000 foot pounds or more, includes a ram which is engageable by a pair of rotating flywheels. The ram may impact a tool, as of a chisel type adapted for demolition purposes, or having a enlarged head fo...	05/31/1988
4708774	Coal compactor rod retainer Compacting rod retainers are disposed on both sides of a web of the compacting rods and consist each of a bushing mounted on a drive shaft eccentrically, on which a carrier is slidably engaged, and cooperating with an associated clamping wedge. The opposi...	11/24/1987
4640452	Device for driving nails or similar fastening elements A device for driving nails, staples and similar fastening elements includes an electromotor for rotating a driving member. The rotation of the driving member is transferred to a driven member which, in turn, converts the rotational movement into translati...	02/03/1987
4627500	Coal-compacting power-hammer rod activator In the coking of coking coal according to the compression process the coking coal is compressed by power hammers before its introduction into the coke oven, whereby these hammers having elongated hammer rods are lifted by means of driven cam disks acting ...	12/09/1986
4605073	Device in needle hammers A device in pressure medium operated needle hammers, the needles (24) being arranged in a reciprocatingly movable working member (3) by at least one flexible holder member (31, 39) and, by a friction grip of the holder member being caused to follow the mo...	08/12/1986
4533002	Device for gripping and raising tamping tools or for holding raised tamping tools in a tamping machine which is especially used for the packing of coking coal In a device for gripping and lifting tamping tools or for holding raised tamping tools in a tamping machine, the individual tamping tools rods are clamped in abutments (2) by slideable clamping members (3). In the device for lifting tamping tools, a contr...	08/06/1985
4530454	Device for driving nails and similar fastening elements A device for driving nails and similar fastening elements includes a driver rod performing a reciprocating stroke-like movement for placing the nails. A rotating driving element transmits the driving power to the driver rod so that it carries out the stro...	07/23/1985
4516662	Rod-clamping means of a percussive air tool for driving into the ground and removing therefrom rod-like pieces A rod-clamping device comprises an impact load transmission assembly which includes a housing having a through axial cavity and a system of jamming elements, a rocoil force take up assembly which includes a housing having a through axial cavity, a collar ...	05/14/1985
4487273	Gripping tool adapted for use with device for driving rod-shaped elements into and out of the ground A distinguishing feature of the present invention comprising a shell with side ports and an axial taper through cavity whose generatrix is inclined to the shell center line at an angle of less than the self-wedging angle, spring-biased gripping jaws accom...	12/11/1984
4323127	Electrically operated impact tool One or both of a pair of oppositely rotating bodies, such as motor driven flywheels, are mounted for pivotal movement against the side of a ram. One or more tension rods connect pivot shafts or members for equalizing precession and similar forces of rotat...	04/06/1982
4204622	Electric impact tool This invention relates to an electric impact tool characterized by a pair of electric motor-driven counterrotating flywheels, at least one of which is movable relative to the other from a retracted inoperative position into an extended operative one close...	05/27/1980
4132276	Arrangement for forming vertical or steeply inclined shafts A stopping apparatus is suspended in a pilot shaft and blasting charge holes are drilled outwardly and downwardly from successive vertical positions from the bottom to the top of the pilot shaft to provide a circular array of holes fanned-out from each ve...	01/02/1979
4002210	Friction wheel actuated post driver The guide frame of a post driver is supported in an adjusted position by the three-point hitch of a tractor and its driver element is displaced upwardly by a friction drive assembly carried by the guide frame and driven by a power take-off from the tracto...	01/11/1977

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Class 173/53 - HAMMER OR TOOL SHAFT RECIPROCATED BY GRIPPING MEANS WHICH RELEASE OR YIELD TO PERMIT ADVANCE