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Ballistic resistant body covering
A ballistic resistant body covering for protecting the torso, groin and neck area from ballistic missiles.
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| Number | Title | Issue Date |
| 7484570 | Percussion device Percussion device including a machine housing (1), a forwards and backwards movable percussion piston (2) in the machine housing, and a reciprocatingly movable tubular valve body (6) inside the machine housing, said percussion piston (2) ... | 02/03/2009 |
| 7413027 | Impact power tool with a precision controlled drive system An improved impact power tool for carving and engraving an article comprises an air delivery system operable to communicate with a pressurized air source; a drive assembly operable to receive air from the pressurized air source via the air delivery system; a hand he... | 08/19/2008 |
| 7168504 | Rotary hammer including breather port A rotary hammer and a power tool. The rotary hammer is operable in an idle mode and a hammer mode and comprises a housing and a barrel positioned in the housing and having a forward portion. A ram is positioned within the barrel and is movable relative to the barrel... | 01/30/2007 |
| 7152692 | Hydraulic hammer having a sealing bushing A hydraulic hammer having a sealing bushing includes a percussion piston that delivers strokes to a tool. A lower part of the percussion piston is sealed with respect to a frame by the sealing bushing, which includes one or more lower seals. The sealing bushing does... | 12/26/2006 |
| 6913088 | Hammer drill and /or percussion hammer with no-load operation control that depends on application pressure A percussion hammer drill and/or percussion hammer that can be guided by a handgrip comprises a pneumatic spring striking mechanism with a reciprocating drive piston and with a percussion piston that can be operated by the drive piston. A cavity for accommodating a ... | 07/05/2005 |
| 6691798 | Variable hand pressure activated power tool A hand-held power tool for use in hand working operations including a hand pressure sensing element for adjusting the power of the tool. More specifically, the invention provides a hand engraving power tool that is activated from absence of power to much ... | 02/17/2004 |
| 6672403 | Method and apparatus for protecting a fluid-operated percussion device against no-load strokes Depending on the working and application conditions, it may be desirable to equip fluid-operated percussion devices with a mechanism that protects against no-load strokes, particularly in the interest of avoiding undesired stress. In the present case, thi... | 01/06/2004 |
| 6641634 | Hand-held tool with dust extraction A manual machine tool (10) includes a vacuum device for dust removal (19) situated in its housing (12) and a blow-out connection (20) installed after this. A dust collection box (21), particulaily self-contained, can be attached in detachable fashion to t... | 11/04/2003 |
| 6619407 | Air-operated hammer The subject invention pertains to an improved air-operated hammer which can utilize a pressurized air reservoir located near a pressurized air entrance of the hammer. This pressurized air reservoir can continue to receive pressurized air even when the ham... | 09/16/2003 |
| 6530435 | Apparatus for a hand-held pneumatic impact tool An apparatus for a hand-held pneumatic impact tool for use in fine hand working operations includes a handpiece, a foot-operated flow control valve with exhaust and two hand operated flow control valves. The handpiece includes a housing having a cavity an... | 03/11/2003 |
| 6491114 | Slow start control for a hydraulic hammer A control system for a heavy duty hydraulic hammer reduces blank firing of the hammer. The control system provides a reduced flow of hydraulic fluid to the hammer for a selected period of time upon actuation of the hammer and then provides full hydraulic ... | 12/10/2002 |
| 6488102 | Hand-held pneumatic impact power tool A hand-held pneumatic impact tool for use in fine hand working operations includes a mechanism for adjusting impacting characteristics of the device that is conveniently located and adjusted by the user. The mechanism includes an annular band protruding a... | 12/03/2002 |
| 6334495 | Fluid operated percussion device A fluid-operated percussion device (1) having a percussive piston (3), which alternately executes a work stroke and a return stroke due to the effect of a control. To avoid no-load strikes, in one embodiment of the percussion device (1), the percussive pi... | 01/01/2002 |
| 6209659 | Hand-held drill with a compressed air-operated hammer mechanism A hand drill including a housing (2), a rotary drive (8-15) arranged in the housing (2) for driving a chuck (6) provided at a front, in the drilling direction, end of the housing and in which a drill or a chisel tool is received, a compressed air-operated... | 04/03/2001 |
| 6073706 | Hydraulically operated impact device The invention relates to a hydraulically operated impact device, such as a percussion hammer or some other breaking apparatus, comprising a control valve (6) for controlling pressure fluid supplied to and from the percussion piston (1) so that the directi... | 06/13/2000 |
| 6029753 | Increased efficiency percussion piston and method for operating same A percussion piston for use in a drilling apparatus includes a drill bit and at least three tubular parts which increase in diameter in a direction extending from the drill bit toward a rear end of the piston. The piston further includes flanges positione... | 02/29/2000 |
| 5884713 | Vibration generating apparatus A vibration generating apparatus comprises a cylinder assembly (6) having a cylinder and a piston (3) slidably inserted in a cylindrical bore (2) of the cylinder for defining a first pressure receiving chamber (4) with a small pressure receiving area and ... | 03/23/1999 |
| 5860481 | Fluid-operated striker assembly with automatic stroke length variation A fluid-operated striker assembly includes a working cylinder and a striker piston slidably received in the working cylinder for executing working (forward) and return strokes. The striker piston delivers a blow to a tool bit during the working stroke whe... | 01/19/1999 |
| 5718297 | Hydraulic impact hammer The impact hammer comprises a working piston (22) exerting impacts onto an impact surface (23). The hydraulically driven working piston (22) is reciprocatingly controlled by a control means (40,41). At the rearward end of the working cylinder (21), there ... | 02/17/1998 |
| 5653295 | Hydraulic precussion hammer The invention relates to a hydraulic percussion hammer comprising a piston (1), a pressure accumulator (7) in the high pressure circuit, a main valve (8) alternately conducing a high and low pressure to at least one of the pressure surfaces (2,4) of the p... | 08/05/1997 |
| 5556649 | Device for removing runners from molded products A device for removing runners from intermediate molded products includes a holding assembly for maintaining the products in a desired position, a hammer member, an assembly for vibrating the hammer member to cause repeated striking of the intermediate pro... | 09/17/1996 |
| 5526885 | Hydraulic device for driving piles A hydraulic device for driving piles including a casing accommodating a striker with an anvil block, a hydraulic power cylinder, having a rod connected to the striker and a hydraulic directional control selector. A control unit is separated from the direc... | 06/18/1996 |
| 5520254 | Fluid-actuated impact hammer The impact hammer comprises a working piston (22) which is displaceable within a working cylinder (21) and controlled by a control means (40,41) in such a manner that it exerts impacts onto an anvil surface (23) of an adapter (24) which can be connected t... | 05/28/1996 |
| 5392865 | Hydraulic percussion apparatus Apparatus comprising a striking piston driven hydraulically in a reciprocating fashion by an incompressible fluid inside a cylinder and striking against a tool, of the type in which the piston slides in a cylinder having two concentric piston bearing surf... | 02/28/1995 |
| 4947941 | Single-stroke pneumatic apparatus A single - stroke pneumatic apparatus comprises a hollow cylindrical frame 1) in which is mounted for reciprocating back and forth a striker (2) forming in the frame (1) front and rear chambers (3 and 4), the front chamber (3) has its own inlet and outlet ... | 08/14/1990 |
| 4945998 | Hydraulic impact tool An impact tool including a cylinder, a piston slidably mounted in the cylinder and a valve for selectively opening and closing oil feed channels to move the piston up and down. A cylindrical member is slidably mounted on the piston around its large-diamet... | 08/07/1990 |
| 4936393 | Pneumatic tool A pneumatic percussion tool for rock breaking and other purposes having removably enclosed within an outer casing a pneumatic engine including a cylinder with a work head extending slidably from its lower end, a piston slidable in the cylinder impacting t... | 06/26/1990 |
| 4899836 | Hydraulic percussion instrument and method of operating same A reciprocating percussion instrument has a housing forming an axially centered chamber having a front end and formed thereat with a pair of adjacent ports, a tool projecting from the housing and exposed axially in the chamber, and a double-acting piston ... | 02/13/1990 |
| 4878550 | Pilot-valve-controlled percussion drilling tool A down-hole percussion drilling tool supplied with compressed air includes a piston reciprocated in an enclosed cylinder against a bit. A spool is continuously reciprocated in a valve chamber by a pilot fluid pressure supply, tapped from the compressed ai... | 11/07/1989 |
| 4825960 | Synchronized hydraulic hammer arrangement Hydraulic hammers are useful for transmitting high impact blows to a tool for fracturing hard material. When two hammers are used in combination the impact blows delivered to a common tool by the hammers should be synchronized for maximum effectiveness. T... | 05/02/1989 |
| 4817737 | Hydraulic striking device with impact frequency control In the hydraulic breaker according to the present invention, oil pressure at a fixed value always flows in the circuit at a low pressure side whenever the piston is raised or lowered, to prevent the need for an accumulator in the circuit at the low pressu... | 04/04/1989 |
| 4750568 | Pneumatic rescue tool A hand-held pneumatic rescue tool may be driven from a bottled compressed gas. The driving gas is used only for the blow-striking stroke, while a compression spring is used to provide a force for the return stroke that is independent of the pressure of th... | 06/14/1988 |
| 4745981 | Hydraulic impact tool A hydraulic impact tool having a housing, a working tool, a ram, an energy storage device, and a valve slide. The tool also has a high pressure hydraulic fluid inlet port, an intermediate pressure hydraulic fluid inlet port, and two return lines. One of t... | 05/24/1988 |
| 4741404 | Percussion tool utilizing negative pressure A percussion tool has a frame in which a percussion element is fitted such that it can move axially by a small distance and in which a hammer for hitting the percussion element is supported axially movably. The hammer is moved toward a standby position by... | 05/03/1988 |
| 4669553 | Percussion tool A percussion tool utilizing a reciprocatory piston movement for applying an impact force on to a working surface including a casing (1) having disposed axially therein a hammer member (12), an anvil (5) impacted by the hammer member and a chisel point (4)... | 06/02/1987 |
| 4646854 | Hydraulic striking device A hydraulic striking device (1) includes a percussion piston (3) which reciprocates in an operating cylinder (2) and strikes a bit (4). The reciprocation is governed by a control valve (10) which is connected to the operating cylinder by a control conduit... | 03/03/1987 |
| 4557338 | Tool, particularly a boring tool This invention relates to a fluid pressure operated tool of the type having an axially reciprocatable and rotatable shaft to which a work piece such as a rock drill is attachable. The tool is driven by a planetary piston type of motor with a rotary extern... | 12/10/1985 |
| 4523647 | Power hammer A power hammer for driving piles and the like which includes a housing having a ram carried therein for reciprocating vertical movement to strike, during its downward movement, an anvil slidably carried within the lower portion of the housing. The portion... | 06/18/1985 |
| 4496007 | Compressed-air pile-driver A compressed-air pile-driver, especially for axially insertable tools, including a ram arranged in a housing. The interior of the housing is divided by the ram respectively into an upper compression or expansion chamber and a lower compression or expansio... | 01/29/1985 |
| 4487274 | Rock drills A rock drill is provided including a flap valve allowing high cutting speed operation over a range of compressed air pressures. The rock drill further includes a wear sleeve secured to a back head with a chuck to the opposite side, an inner cylinder withi... | 12/11/1984 |
