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Class Information
Number: 72/351
Name: Metal deforming > By use of closed-die and coacting work-forcer (e.g., push-drawing) > Cup or shell drawing (i.e., deep drawing) > With application of frictional restraining force to work during deformation > With yieldable actuation of work-gripper (e.g., spring-biased blank-holder)
Description: Subject matter wherein the means for actuating said gripper comprises a force responsive (e.g., deformable, resilient, or slipping) element forming part of the force-transmitting train, such element serving to limit the force exerted on and by said gripper.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8640519 Press-molding mold, and press-molding method Feb. 4, 2014
8474296 Formation tool for a punching machine Jul. 2, 2013
8468866 Die cushion device Jun. 25, 2013
8429946 Press-working method, and press-working apparatus Apr. 30, 2013
8402804 Method and apparatus of forming tailored blank plate Mar. 26, 2013
8341996 Method and deep-drawing apparatus for the deep drawing of metal sheets Jan. 1, 2013
8261591 Apparatus for hot-forming, press-quenching, and cutting semifinished hardenable-steel workpiece Sep. 11, 2012
8091395 System, method, software arrangement and computer-accessible medium for press-forming of materials Jan. 10, 2012
8061176 Press molding device and press molding method Nov. 22, 2011
8042375 Press die cushion controller Oct. 25, 2011
7886564 System, method, software arrangement and computer-accessible medium for press-forming of materials Feb. 15, 2011
7861568 Press forming die set and method Jan. 4, 2011
7861569 Reaction device for forming equipment Jan. 4, 2011
7827843 Device for controlling the drawing process in a transfer press Nov. 9, 2010
7818988 Striker plate and sheet-metal forming tool comprising such a striker plate Oct. 26, 2010
7757526 Method for changing force control gain and die cushion control apparatus Jul. 20, 2010
7707866 Die separator cylinder May. 4, 2010
7406851 Die cushion controlling apparatus and die cushion controlling method Aug. 5, 2008
7401488 Die cushion apparatus Jul. 22, 2008
7340934 Press molding die and manufacturing method of same Mar. 11, 2008
7337645 Draw press with a fixed draw punch and a floating draw punch Mar. 4, 2008
7302822 Shell press and method for forming a shell Dec. 4, 2007
7296456 Methods and apparatus for manufacturing flanged articles Nov. 20, 2007
7287409 Die cushion device Oct. 30, 2007
7260971 Apparatus for locking a sheet of metal suitable to be shaped in a press Aug. 28, 2007
7257460 Reconfigurable variable blank-holder force system and method for sheet metal stamping Aug. 14, 2007
7243521 Cushion pin, wear plate, load supporting device, die cushion, press machine and pressing method Jul. 17, 2007
7237423 Apparatus for stretch forming blanks Jul. 3, 2007
7086265 Method for controlling the material flow during the deep-drawings of sheet metal, and deep-drawing tool Aug. 8, 2006
7007535 Method and apparatus for aligning components of a press Mar. 7, 2006
7004007 Die cushion apparatus for hot stretch-forming Feb. 28, 2006
6941789 Die cushion device Sep. 13, 2005
6796159 Low contact force spring Sep. 28, 2004
6729173 Hydraulic draw press arrangement May. 4, 2004
6705150 Method of making a raised panel door section for a garage door Mar. 16, 2004
6691545 Tool and a method for pressure shaping Feb. 17, 2004
6622539 Deep-drawing method and deep-drawing die Sep. 23, 2003
6588244 Process for hydroforming sheet metal and device for practicing the same Jul. 8, 2003
6564609 Equalizing fluid-operated apparatus and method of assembling the apparatus May. 20, 2003
6520075 Double action hydraulic press Feb. 18, 2003
6460396 Power press Oct. 8, 2002
6386013 Container end with thin lip May. 14, 2002
6354131 Deep-drawing tool with integral holding-down device Mar. 12, 2002
6237381 Power press ram force modulation and apparatus for use therewith May. 29, 2001
6167742 Drawing and coining die for manufacturing metal containers and the like Jan. 2, 2001
6032506 Improvment to the blank holder force regulating system in a press Mar. 7, 2000
6009783 Method in a sheet metal work center and a sheet metal work center Jan. 4, 2000
6006578 Die for drawing molded sheet metal parts Dec. 28, 1999
5979211 Hydraulic deep drawing apparatus Nov. 9, 1999
5960665 Drawing device for drawing presses Oct. 5, 1999

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