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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7287409 | Die cushion device A die cushion device is comprised of die cushion modules which are independently movable and unitized. The individual die cushion modules are provided with a cushion pad, a servomotor, a power transmission mechanism, a power conversion mechanism and a guide member. ... | 10/30/2007 |
| 7243521 | Cushion pin, wear plate, load supporting device, die cushion, press machine and pressing method An elastic member is disposed on a load supporting device such as cushion pins and wear plates, which are placed between at least a workpiece and a die cushion pad and transfer a load applied to the work to the die cushion pad, to support the load. The load supporti... | 07/17/2007 |
| 7083164 | Cushion and cushion cylinder for ram or bolster of a press A high-pressure, inert gas cushion assembly for the ram or bolster of a metal stamping press includes a manifold having fluid-flow passages defined therein, along with a plurality of cylinder mounting locations each in communication with at least one of the fluid-fl... | 08/01/2006 |
| 6915879 | Main shaft balancing device for machine tool A gas spring comprising a cylinder body filled with compressed gas and an upright rod passing through a rod side end wall member of the cylinder body. By supporting a main shaft unit with the gas spring, the load on a vertical displacement mechanism is reduced. A pa... | 07/12/2005 |
| 6749185 | Cushion assembly and method A cushion assembly includes a lower end wall which is at least partially enclosed by a tubular cylindrical outer wall. An upper end wall is also partially enclosed by the outer wall. A tubular cylindrical inner wall extends between recesses in the lower end wall and... | 06/15/2004 |
| 6663089 | Hydraulic cylinder with boosting function A fluid pressure cylinder with pressure intensifying function, has an oil-filled hydraulic pressure cylinder which is filled with oil and tightly sealed. A gas-filled gas spring is charged with gas and tightly sealed. By means of gas spring, oil in oil ch... | 12/16/2003 |
| 6390457 | Soft-start, soft-return gas spring A gas spring includes an outer tube; a base plate; a head plate; an inner tube mounted to extend between the head plate and the base plate; a piston/rod assembly mounted to reciprocate vertically in the inner tube between a retracted, compressed position ... | 05/21/2002 |
| 6322059 | Low contact force spring A fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The pist... | 11/27/2001 |
| 6170809 | Delay return gas spring A gas spring with a first gas chamber communicated with a second gas chamber through a calibrated orifice to control the rate of return of gas from the first chamber to the second chamber to thereby control the rate at which a piston rod of the cylinder r... | 01/09/2001 |
| 6145819 | Die cylinder and manifold and system A plurality of die cylinders adapted to contain gas under pressure are mounted on a manifold. Each cylinder comprising a cylinder body having an axially inner cylinder portion and an axially outer cylinder portion. A piston has an axially inner end portio... | 11/14/2000 |
| 6022004 | Self-lubricating fluid cylinder A self-lubricating cylinder assembly for use in a press operable in an upright orientation and in an inverted orientation. The cylinder assembly contains a working fluid under pressure and lubricating oil. The cylinder assembly includes a cylinder body th... | 02/08/2000 |
| 5480128 | Gas spring with threaded mount and method of producing the same A gas spring with an elongate tubular casing having a chamber for containing a gas under pressure therein. The casing has an opening at one end and an annular groove around the outer circumference. A piston rod projects from the casing through the opening... | 01/02/1996 |
| 5465811 | Self-contained gas cylinder A gas cylinder element having a replenishable lubrication means provided in the piston rod guide bushing. The gas cylinder element has an extended life expectancy and reduced manufacturing cost.... | 11/14/1995 |
| 5454549 | Spring device Disclosed is a spring device which, during use in co-action with a deep-drawing device, is capable of causing the blank-holder pressure to decrease in proportion to the remaining material. The spring device holds substantially constant the blank-holder fo... | 10/03/1995 |
| 5452883 | Gas spring The present invention relates to gas cylinder springs and, more particularly, to gas cylinder springs which receive gas from a manifold into which the gas cylinders are threaded. The invention specifically relates to a way of automatically and in a nonmec... | 09/26/1995 |
| 5437436 | Stand-alone gas spring A self-contained gas spring that has low heat generation characteristics and is easy to manufacture and maintain. The spring includes a bearing and seal assembly that is easy to remove from the cylinder body of the spring. The assembly includes an annular... | 08/01/1995 |
| 5386975 | Gas die cylinders A gas cylinder for use in die systems for forming lightweight parts. In one form, the cylinder forms a self contained gas spring which is interchangeable with a coil spring that is constructed such that it is not adversely affected by the deleterious effe... | 02/07/1995 |
| 5344125 | Gas spring with filler valve A filler valve and fitting for a gas spring. The filler valve has a body slidably received in a cavity in a housing and movable between a first sealed position for retaining gas within a gas chamber in the spring and a second position for bleeding gas fro... | 09/06/1994 |
| 5339932 | Apparatus and method to cushion movement of a member An apparatus to cushion movement of a member in a machine includes a piston which divides a cylinder into upper and lower variable volume chambers. A body of lubricating liquid is held in a chamber in the piston. Lubricating liquid is conducted from the c... | 08/23/1994 |
| 5318281 | Self contained gas spring and die cylinder A self contained gas spring comprising a cylindrical housing having a closed end, an open end and a cylindrical bore. A cylindrical sleeve extends into the bore of the housing. The sleeve has at least a portion thereof forming an internal cylindrical surf... | 06/07/1994 |
| 5314172 | High pressure die cylinder and manifold system A high pressure die cylinder and manifold system including a plurality of die cylinders mounted on a manifold. Each die cylinder includes a cylinder body in which a piston rod and a piston is positioned for limited relative movement with respect to the cy... | 05/24/1994 |
| 5265852 | Gas spring with gas passageways in the assembly housing and piston rod A gas spring assembly includes a cylindrical tube, a piston slidable within the tube and defining a gas pressure chamber, a rod extending from the piston through one end of the tube, and a seal assembly including an axially compressible, consumable seal f... | 11/30/1993 |
| 5220820 | Apparatus and method for cushioning movement of a member in a press An apparatus and method for use in cushioning movement of a member in a press includes a cushion assembly having a piston and cylinder which are movable relative to each other against the influence of fluid pressure to cushion movement of the member. A fl... | 06/22/1993 |
| 5197718 | Self-contained gas springs interchangeable with coil springs A self contained gas spring which is interchangeable with a coil spring that is constructed such that it is not adversely affected by the deleterious effects of oil and other contaminants. The gas spring comprises a one-piece cylindrical upper body having... | 03/30/1993 |
| 5172892 | Self contained gas spring A self contained gas spring comprising a housing having a closed end and an open end, and a cylindrical bore. A cylindrical sleeve is inserted into the bore of the housing. The sleeve has at least a portion thereof forming an internal cylindrical surface.... | 12/22/1992 |
| 5100113 | Pneumatic die cushion equipment A closed type cylinder unit, instead of the open-to-atmosphere type cylinder unit of conventional equipment forms part of the die cushion apparatus. Based on the principle that the die cushion capability by the closed type cylinder unit is determined by t... | 03/31/1992 |
| 5098071 | Die spring apparatus A compressed gas and a liquid are contained in a cylinder. A liquid chamber containing the liquid and a gas chamber containing the gas are divided by a metallic bellows. The liquid chamber is situated on the side of an open end of the cylinder. A rod is i... | 03/24/1992 |
| 5088698 | Sealing construction for a gas spring A gas spring comprising a cylindrical body having a base wall and an integral side wall with an open upper end defining a bore. The bore includes a lower cylindrical portion and an upper cylindrical portion of greater diameter than the lower cylindrical p... | 02/18/1992 |
| 5076404 | Time delay device for a gas spring The present invention relates to an arrangement for a gas spring (1). This comprises a cylinder (2) with a piston (3) capable of being displaced axially therein, which marks the boundary of an inner space (4) of the cylinder (2) filled with a compressible... | 12/31/1991 |
| 4930336 | Single action cylinder A single action cylinder is used with a machine. The machine has a first part and a second part having reciprocating motion relative to each other. The single action cylinder affects the reciprocation between the first and second parts. The cylinder inclu... | 06/05/1990 |
| 4899572 | Pneumatic-hydraulic booster type driving device for the cushion-knockout mechanism associated with the slide of a press-machine A pneumatic-hydraulic booster type driving device for the cushion-knockout mechanism associated with the slide of a press-machine serves to stably hold down a work plate such as a printed board and the like while performing a cushion operation at the time... | 02/13/1990 |
| 4890476 | Precision plate bending machine having a play removing device A plate bending machine for performing precise bending operations includes a machine pedestal having two opposite side sections, a guide member provided at each side section of the machine pedestal, and a vertically movable guide post supported by the gui... | 01/02/1990 |
| 4860571 | Power press with improved cushioning system A power press used for metal working is provided with a cushioning system. During the operation of a press, abrupt changes in the velocity of certain moving parts of the press may damage or cause rapid wear to parts. The present invention utilizes pneumat... | 08/29/1989 |
| 4844429 | Die spring construction A pneumatic shock absorber used primarily as a die spring includes a piston formed with a base and an upstanding cylindrical body provided with an internal fluid reservoir. An outer housing is mounted on the base and extends about the cylindrical body. An... | 07/04/1989 |
| 4838527 | Convertible gas spring A gas spring with a piston rod slidably received in a cylinder which defines a chamber in which a gas is compressed when the rod is forced into the cylinder. The gas spring can be operated with either an external source of gas or as a precharged and self-... | 06/13/1989 |
| 4825681 | Pneumatic press counterbalance and cushion construction The present invention relates to a pneumatic press counterbalance and cushion construction. The press counterbalance holds certain parts of a press in the same relative engagement during the return stroke of a ram of the press as during the power stroke o... | 05/02/1989 |
| 4815718 | Self-lubricating die cylinder A self-lubricating die cylinder assembly is provided containing a cylinder, piston, expansion reservoir and working chamber. A lubricating oil recirculation means is provided to transport oil between the working chamber and the expansion reservoir during ... | 03/28/1989 |
| 4796460 | Cushion construction including snubber A die cushion construction for use in a press is the subject matter of the present invention. The instant die cushion construction includes a fixed plate connected to the press. A resilient cushion actuator has one end sealingly connected to the fixed pla... | 01/10/1989 |
| 4754955 | Air cushion snubber apparatus An improved snubber apparatus for an air cushion within a forming press is provided. A floating piston is mounted within the air cushion and defines a snubbing chamber. As the air cushion returns to its top stroke position after yieldably deforming to cus... | 07/05/1988 |
| 4742997 | Gas spring with separate charging and pressure relief valves For use in a system comprising a source of pressurized fluid and a plurality of lines extending to a plurality of gas springs, a gas spring comprising a cylindrical body with a bore, a piston rod positioned in the body and having an end projecting beyond ... | 05/10/1988 |
