|
Match
|
Document |
Document Title |
|
|
7472897 |
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...
|
|
|
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...
|
|
|
7270318 |
Device at an energy accumulating piston-cylinder tool
The present invention relates to an arrangement in an energy-accumulating piston-cylinder device ( 1, 2 ) having a piston ( 2 ) and a cylindrical casing ( 1 ). The invention is characterized by an...
|
|
|
7121538 |
Arrangement at a press tool for breaking the piston/piston rod of a gas spring
The invention relates to an arrangement in a pressing tool for braking the return movement of pistons/piston rods (D 1 ) of gas-filled springs (D) and thereby also of a sheet metal holder (B)...
|
|
|
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...
|
|
|
6971303 |
Method and device at a piston-cylinder device
A method and an arrangement in an energy-accumulating piston-cylinder arrangement (A) has a piston/piston rod part ( 2 ), guide/end ( 3 ) and tubular casing ( 1 ). The casing ( 1 ) is provided with...
|
|
|
6941789 |
Die cushion device
After molding is started, a large reaction force is obtained by compressing the air within a lower chamber by a piston while maintained in a sealing state. At an intermediate time of the molding, a...
|
|
|
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...
|
|
|
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...
|
|
|
6729173 |
Hydraulic draw press arrangement
A hydraulic drawing system for a press is provided for controlling a blank holder. The blank holder can be moved by at least one hydraulic cylinder-piston unit which has at least one pressure...
|
|
|
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...
|
|
|
6516696 |
Sleeve-type gas spring
A sleeve-type gas spring for a turret indexing press has an annular piston operably associated with a punch tool to reciprocate therewith and defining in part an annular gas chamber constructed to...
|
|
|
6460396 |
Power press
This invention relates to a hydraulic force modulator used in a power press to provide a predetermined force with a defined force applied by a ram of the press at defined incremental positions of...
|
|
|
6457702 |
Annular bellows unit for vehicle suspension
An annular bellows unit for replacing a vehicle suspension coil spring that encloses a shock absorber or hydraulic actuator includes annular second flange members that are sealingly connected at...
|
|
|
6412616 |
Energy dissipation system
An energy dissipation system for limiting forces applied to object; includes a piston rod that extends out of a pneumatic cylinder which contacts the object, the piston rod is forced from its...
|
|
|
6332602 |
Vehicle suspension having annular air chamber
An annular bellows unit for replacing a vehicle suspension coil spring that encloses a shock absorber or hydraulic actuator includes annular second flange members that are sealingly connected at...
|
|
|
6237381 |
Power press ram force modulation and apparatus for use therewith
This invention relates to a hydraulic force modulator used in a power press to provide a predetermined force with a defined force applied by a ram of the press at defined incremental positions of...
|
|
|
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...
|
|
|
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...
|
|
|
6131497 |
Gas cylinder with time delay
A die stamping system in which an upper die moves downwardly toward and upward away from a lower die to stamp a workpiece, and in which a portion of the lower die is supported by at least one gas...
|
|
|
6068245 |
Apparatus and method for cushioning the action of draw dies operating in a stamping press and the like
A draw die operable within a straightside press includes a lower die shoe with a lower die; pressurized lift cylinders each having an upwardly extending piston rod and an axial resistance to...
|
|
|
6059273 |
Gas spring arrangement
The invention relates to an arrangement for a gas spring. The arrangement comprises a cylinder (1). At its one end, this is delimited by a fixed end wall (2), and at its other end there is a first...
|
|
|
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...
|
|
|
5813275 |
Safety circuit for press die cushion
A safety circuit for a press die cushion wherein the press die cushion has a pad that is resiliently supported by a cushion cylinder which is supplied with a pilot pressure via an air delivery...
|
|
|
5735201 |
Apparatus including mutually communicating hydraulic cylinders for even distribution of blank-holding force on pressing machine
A balancing apparatus for a pressing machine, including a force generating device for generating a force during a pressing operation on a blank, and a plurality of balancing hydraulic cylinders...
|
|
|
5660379 |
Pneumatic spring
A pneumatic spring for damping movement of a machine part having a guide shaft for performing a stroke. The spring includes a housing containing gas. The housing is formed as a stationary body with...
|
|
|
5623848 |
Pressing method and system wherein cushion platen is lowered by cooperation of shock absorbers and cylinders before holding of blank between die and pressure ring
Pressing method and system wherein a drawing operation on blank is performed by die and punch while the blank is held between the die and a pressure ring by a blank holding force which is generated...
|
|
|
5588641 |
Gas spring which after compression has a time delayed return to its original length
A gas spring apparatus includes first and second cylinders each closed at both ends by end walls, first and second pistons each capable of axial displacement being disposed inside a fluid-filled...
|
|
|
5549281 |
Liquid spring for punch press
A metal working press employs a self-contained liquid spring adapted for the clamping of metal blanks during the performance of punching, cutting or forming operations thereon. The liquid spring...
|
|
|
5499525 |
Hydraulic drive for a sheet metal forming press
The invention relates to a drive for a press, in particular for a sheet metal forming press, the press including a press ram which can be moved up and down and a hydraulic movable counter support....
|
|
|
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....
|
|
|
5472071 |
Shock-absorbing strut for hydraulic wheel-drive unit
A shock-absorbing strut in which fluid passages extend through the strut to communicate with a hydraulic wheel drive of the wheel assembly to which a movable part of the strut is affixed....
|
|
|
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.
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
5299444 |
Hydraulic cushioning system for press, having hydraulic power supply including means for adjusting initial pressure to be applied to pressure-pin cylinders
A hydraulic cushioning apparatus for a press having an upper and a lower die assembly (3, 9) for forming a sheet-like workpiece (6), including hydraulic cylinders (54) incorporated in one of the...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
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...
|
|
|
5150598 |
Apparatus for scribing grain-oriented electrical steel strip
An apparatus for scribing grain-oriented electrical steel strip has a movable die attached to a reciprocating drive and an opposite fixed die. A strip held between the two dies is scribed by the...
|
|
|
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...
|
|
|
5099673 |
Drawing apparatus in drawing stages of presses
A drawing apparatus in drawing stages of a press, having a pressure cheek divided into segments, to the corner areas of which pressure cylinders are applied. The pressure cylinders are fixed to the...
|
|
|
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...
|
|
|
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...
|