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| Number | Title | Issue Date |
| 7997184 | Self starting vibrator Briefly, the invention comprises a vibrator with an on-demand start-up system, that inhibits fouling the atmosphere, with one embodiment of the invention including an integral non-fouling start-up system wherein at least one of the bearing surfaces contains a surfac... | 08/16/2011 |
| 7963207 | Vibrator A linear vibrator having an internal cylindrical bearing surface forming a chamber therein and a fluid inlet to direct a fluid into the chamber with a one piece piston slideable located therein with the piston simultaneously rotatable and axially displaceable therei... | 06/21/2011 |
| 7530301 | Self starting vibrator Briefly, the invention comprises a vibrator with an on-demand start-up system, that inhibits fouling the atmosphere, with one embodiment of the invention including an integral non-fouling start-up system wherein at least one of the bearing surfaces contains a surfac... | 05/12/2009 |
| 7234537 | Sonic drill A sonic drilling apparatus having a work piston within a cylinder chamber to provide a vibratory force through the alternate application of fluid under pressure into the bore above and below the piston in a manner that the piston will be forced to reciprocate within... | 06/26/2007 |
| 7225753 | Bell device A bell device includes a housing having two housing members secured together, and one or more peripherals rib extended into an opening of the housing, a securing device includes a shank engaged in the opening of the housing, and includes a peripheral flange extended... | 06/05/2007 |
| 7207116 | Air saw A main spindle of an air saw is reciprocated by sliding a piston in a cylinder chamber with the pressure of air supplied to the cylinder chamber via an air supply path so as to alternately apply the air pressure to pressure-receiving surfaces of a back plate and a f... | 04/24/2007 |
| 7201302 | Driver blade with auxiliary combustion chamber for combustion powered fastener-driving tool A driver blade for use in a combustion-powered fastener-driving tool includes an elongate tubular body having a combustion end and a driving end, the combustion end being configured for attachment to a piston, and the driving end having a substantially solid cross-s... | 04/10/2007 |
| 7162944 | Continuous reciprocating linear motion device A linear fluid piston device not requiring a fluid valve to operate and has operating piston stroke capabilities beyond traditional vibration fluid devices. The linear fluid device features (a) a movable piston means for linear motion, (b) a feature wherein said bod... | 01/16/2007 |
| 7028785 | Pneumatic impact piercing tool A pneumatic ground piercing tool includes a tail assembly including a tail nut and tail cap, the tail cap having a plurality of discharge ports for exhausting spent compressed air, the discharge ports opening into an annular space between a rearwardly opening recess... | 04/18/2006 |
| 6923270 | Pneumatic impact piercing tool A pneumatic ground piercing tool includes a tail assembly including a tail nut and tail cap, the tail cap having a plurality of discharge ports for exhausting spent compressed air, the discharge ports opening into an annular space between a rearwardly opening recess... | 08/02/2005 |
| 5513962 | Pneumatically actuated lubricant pump A pneumatically actuated lubricant pump wherein air is forced into the cylinder through a passage extending longitudinally through the piston rod. The rod is part of a piston assembly reciprocably mounted within a pump housing. The air passage extends fro... | 05/07/1996 |
| 5493944 | Pneumatic random vibration generator A true random vibration generator for use in mechanical vibration generation includes a housing, a piston, and a programmer. The housing defines a cylinder closed at an impact end. The piston is slidably disposed in the cylinder and propelled by a pressur... | 02/27/1996 |
| 5249634 | Impact borer for embedding lines, anchoring cables, and sinking wells An impact borer having a shell and an air drive within the shell. The air drive includes a ram for reciprocation within the shell and a manifold joined to the shell. The manifold defining an inlet passage delivering air to the air drive and an outlet pass... | 10/05/1993 |
| 5209564 | Vibrator A pneumatic vibrator is disclosed including a tubular housing having closed ends, an inlet port in the housing through which a fluid, such as air can flow into the housing, and a free-floating piston in the housing having two passageways through which the... | 05/11/1993 |
| 5197285 | Modular digital actuator A modular digital actuator is formed by interconnecting a plurality of modules. Each of the modules includes a housing having a pair of different sized axially extending cylinder sections in which is received a T-shaped piston with the top of the T mating... | 03/30/1993 |
| 5183121 | Submersible pneumatic drilling unit This heavy duty equipment comprises a working cylinder, a striking piston, an upper lid and a holder of a drill bit. An anterior side duct in the wall of an upper working space of the working cylinder, communicating via an upper filling duct and a posteri... | 02/02/1993 |
| 5172771 | Reversible impact-operated boring tool A reversible impact-operated boring tool and a method for reversing the direction of operation of the same rapidly and safely is disclosed. The tool according to the invention possesses a second supply line for supplying pressurized fluid to the tool. The... | 12/22/1992 |
| 5152352 | Pneumatic percussion tool, especially for the preparation of bones A piston is oscillating periodically within a cylinder, propelled by compressed air. At at least one of its end positions, the piston generates a stroke that acts on a working tool, e.g. a rasp. The sizes of the piston surfaces acted upon by the compresse... | 10/06/1992 |
| 5131476 | Down hole percussion drill apparatus A downhole percussion drill or hammer (100) is disclosed having an outer casing (2) in which a reciprocating piston (26) which periodically impacts a drilling bit (16) disposed at a bottom end of the casing. A top chuck (1), attached to the top end of the... | 07/21/1992 |
| 5115717 | Ramming apparatus A ramming apparatus having a shortened length without sacrificing ramming power requirements is disclosed comprising a housing having a front end and a rear end, a pneumatically driven percussion piston having a front end and a rear end operatively mounte... | 05/26/1992 |
| 5109932 | Impact borer, connector for embedding lines, anchoring cables, and sinking wells An impact borer is disclosed for embedding lines and for sinking geothermal wells. The impact borer has a shell, which has a longitudinal bore. An anvil closes one end of the bore. A ram is reciprocally slideable within the bore, against and away from the... | 05/05/1992 |
| 5094303 | Impact apparatus and process for the control of impact apparatus In a device for controlling a pneumatic pile-driving or ram drilling apparatus having an internal, reciprocating ram, the control is effected in a forward stroke phase, a reverse stroke phase, and a subsidiary phase for the supply of air via a control dev... | 03/10/1992 |
| 4945815 | Pneumatic type of reciprocating movement device A pneumatic type of reciprocating movement device capable of a high cycle speed over a short stroke. A rod member with a flange is slidably mounted in a cylinder member such that the flange divides a cavity in the cylinder into a left and right portion. I... | 08/07/1990 |
| 4841842 | Apparatus for scabbling concrete There is described apparatus for scabbling concretw which includes a hollow cylinder block having a top and bottom plate between which plates there is provided a smooth sided hollow cylindrical cylinder liner. The piston for reciprocation within the cylin... | 06/27/1989 |
| 4653596 | Percussive air tool A percussive air tool with a hollow cylindrical stepped housing having air inlet and air exhaust ports. A stepped hammer reciprocates inside the housing and has an axial central bore with a tube element disposed in the bore. The tool includes, work stroke... | 03/31/1987 |
| 4651833 | Pneumatic impact tool A pneumatic impact tool wherein a two-stage piston is reciprocable in the two-stage chamber of a cylinder. The tool which is to penetrate into a bone is mounted in the front portion of the cylinder and the piston strikes against such front portion in resp... | 03/24/1987 |
| 4534422 | Fluid operated hammer In deep bore drilling it is usual to use a fluid operated percussive hammer to provide necessary drive for the boring operation. However a difficulty which is encountered with hammers which are currently in use is that the manufacture of the components fo... | 08/13/1985 |
| 4480525 | Control device for forward and backward travel of automatic _pneumatic percussion boring devices A control device for working cycles of a self-propelled pneumatic boring device with a non-rotatable axially displaceable impact piston controllable by control edges of a control sleeve supported axially non-displaceably but rotatably and at its front end... | 11/06/1984 |
| 4426912 | Apparatus for the continuous adjustment of a jack piston stroke Apparatus for the continuous adjustment of the stroke amplitude of the piston of a jack, the latter having a control member of which at least part is in the form of a rod, which is movable in rotation and in translation and cooperates with the said piston... | 01/24/1984 |
| 4418769 | Hammer starting mechanism A starting mechanism for a reciprocating piston pneumatic hammer provides a passageway coupling a pneumatic piston subchamber to an exit port to exhaust pressurized pneumatic fluid from the subchamber during a start-up period. A pneumatic valve is provide... | 12/06/1983 |
| 4402370 | Valveless pneumatic hammer A valveless pneumatic hammer comprises a hollow casing having a backhead assembly at one end and a bit assembly at the other, and a piston reciprocable in the casing. There is a chamber divider at the backhead end of the casing which co-operates with the ... | 09/06/1983 |
| 4402255 | Compressed-air vibrator with reciprocating piston A compressed-air vibrator with a cylindrical housing confined between closure covers, within which there is arranged a piston reciprocated by the compressed air, whereby the compressed air is alternatingly introduced into the two working chambers through ... | 09/06/1983 |
| 4383581 | Tool for drilling boreholes A tool for cutting percussive rotary drilling of boreholes includes a hollow casing having a bit. A hammer piston is installed in the casing for reciprocations and for cooperation with the bit for imparting impact impulses thereto. The hammer piston divid... | 05/17/1983 |
| 4333537 | Impact drilling tool having improved valving The device described contains a pneumatically operated hammer, a feeder controlling the flow of pneumatic fluid, an anvil which is struck repeatedly by the hammer, a drill bit attached to or integral with the lower end of the anvil, and an outer casing. T... | 06/08/1982 |
| 4290489 | Vibrationless pneumatic tools A pneumatic system includes a pneumatic motor, which may take the form of a vibrationless paving breaker utilizing a blow-striking member or hammer that is propelled to and from its force-transmitting or blow-striking position by a compressed gas. A valvi... | 09/22/1981 |
| 4284147 | Control device for the forward movement and rearward movement of pneumatic ram boring devices Control device for the forward movement and rearward movement of self-driven pneumatic ram boring devices with an impact piston which is axially displaceable between two abutments in a tubular housing, with the axial forward movement and rearward movement... | 08/18/1981 |
| 4270352 | Cycle-controlled sliding-valve in a heating-chamber combustion engine A cycle controlled sliding valve in a heating chamber combustion engine is provided. The valve includes a piston disposed for reciprocal movement within a cylinder, a piston-extension disposed for movement within the cylinder, a connecting rod connected t... | 06/02/1981 |
| 4266465 | Percussion mechanism Fluid-actuated percussion mechanism includes a housing with an internal cylindrical space receiving a reciprocating piston dividing the space into a working stroke chamber and an idle stroke chamber. The mechanism further includes distributing means mount... | 05/12/1981 |
| 4256014 | Piston vibrator A piston vibrator comprising a cylindrical housing having a chamber with a free floating piston therein. The free floating piston is axially moved by a pressurized medium. Piston amplifying structure is provided for regulating the effective mass of the pi... | 03/17/1981 |
| 4248133 | Impact mechanism An impact mechanism operated with gaseous fluid under pressure fed from a source of fluid having a casing with an inner cylindrical space. A piston is accommodated for reciprocation within the cylindrical space of the casing to divide the space into a wor... | 02/03/1981 |
