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| Number | Title | Issue Date |
| 8136381 | Hog ring fastening device A hog ring fastening device is disclosed. The hog ring fastening device includes a body, a magazine attached to the body, jaws pivotally supported on the body, a main pneumatic cylinder for turning the jaws, a teed pneumatic cylinder fixed to the body and adapted to... | 03/20/2012 |
| 7921689 | Pneumatic biasing of a linear actuator and implementations thereof An improved method and apparatus are provided for constructing and operating a linear actuator, and equipment incorporating a linear actuator, by operatively connecting a pressure biasing pneumatic arrangement between the driving member and the driven member of a me... | 04/12/2011 |
| 7743638 | Adjusting cylinders in rolling stands, including vertical edging stands An adjusting cylinder for long, rapid lifting movements in rolling stands, including vertical edging stands, wherein each adjusting cylinder has at least one piston which acts through the bearing chocks of at least one work roll or of an interposed roll to adjust a ... | 06/29/2010 |
| 7430891 | Pneumatic dent removing tool for sheet metal A pneumatic dent removing tool, wherein a sleeve is sheathed onto a vacuum ejector, and the inner screw thread of the sleeve is screwed to the outer screw thread of the vacuum ejector such that the combination of the free space of the vacuum ejector and the sleeve a... | 10/07/2008 |
| 7421874 | Main cylinder or press cylinder of an extrusion/tube extrusion press A press cylinder for an extrusion press having a cylinder beam has a cylinder housing fixed on the beam and a piston shiftable along an axis in opposite forward and rearward directions in the housing and defining with a rear end of the housing a pressurizable cylind... | 09/09/2008 |
| 7395688 | Hog ring fastening device A hog ring fastening device includes a body member, a main pneumatic cylinder attached to the body member, a first swing member supported for turning on the body member, a push means supported on the first swing member, a feed pneumatic cylinder fixed to the first s... | 07/08/2008 |
| 7387008 | Apparatus and method for rolling workpieces There is provided a new and improved apparatus and method for rolling workpieces such as crankshafts. The apparatus has first and second rolling heads mounted at spaced positions along a common rolling arm to receive a crankshaft bearing therebetween which can then ... | 06/17/2008 |
| 7370397 | Tool kit and method for repairing a damage vehicle body member with a hem flange A method and kit for repairing vehicle door skins by reorienting vehicle hem flanges from a closed orientation to an open orientation to allow removal of a damaged door skin from a door frame and replacing with a new door skin with an open orientation hem flange tha... | 05/13/2008 |
| 7290622 | Impact device with a rotable control valve An impact device includes a frame to which a tool is connectible, and a stress element that is supported on the frame and disposed between the frame and the tool. A hydraulic control system leads pressurized hydraulic fluid into and out of a hydraulic fluid space su... | 11/06/2007 |
| 7111541 | Cutting device A cutting device includes a cutter rod, and a movable cutting tool of a length greater than the diameter of the cutter rod. The movable cutting tool is prevented from cracking and breaking. A movable cutting tool (7) has protruding parts (7b | 09/26/2006 |
| 7051568 | Multi-purpose hydraulic tool A multi-purpose hydraulic tool of the open center and closed center type is provided with an OC/CC knob mounted on the trigger activated spool. The spool has a knob which can be turned to easily move between OC and CC operating conditions, without the use of additio... | 05/30/2006 |
| 7032423 | Hydraulic circuit for linearly driving a machine-tool slider in both directions A hydraulic circuit for linearly driving a machine-tool slider in both directions, comprising an hydraulic cylinder (5) whose piston rod (4) is connected to a slider and which is fed with pressurized fluid from a reservoir (14) by a pump (15 | 04/25/2006 |
| 7032429 | Pipe shut off tool A pipe shut off tool is provided which may comprise a jaw that may be engaged to a defective pipe and a pump operative to translate the jaw between a crimping position and a release position. The jaw and pump may be connected to each other via an elongate flexible h... | 04/25/2006 |
| 7003995 | Hydrotapping power unit A hydrotapping power unit is disclosed that is operable to hold a hydrotapping tool in a home position adjacent a part while the latter is being hydroformed in a die cavity, to then advance the tool to pierce a hole in the hydroformed part while the part remains in ... | 02/28/2006 |
| 6920821 | Device and method for controlling stop of hydraulic press and device and method for detecting trouble of speed selector valve A rod pressure holding instruction section controls a servo motor to rotate a two-way pump in a counter direction, and to supply hydraulic oil, with pressure which does not exceed pressure from a weight of a ram, to a two-way pump-side piping, increasing pressure. A... | 07/26/2005 |
| 6874343 | Press brake and method of controlling bidirectional fluid pump of hydraulic cylinder of press brake A controller for a press brake controls a servomotor to reverse the rotation of a bidirectional piston pump so as to reverse the vertical movement of a hydraulic cylinder and a ram. A command generator maintains a constant speed for a predetermined warmup time or di... | 04/05/2005 |
| 6824337 | Machine tool mounted marking apparatus and method A nosepiece adapter (10) for connecting a nosepiece (20) to a tool holder shank (30), wherein said nosepiece adapter (10) is comprised of a shaft (60) and an opposing nosepiece end (50) to receive said nosepiece (20),... | 11/30/2004 |
| 6729104 | Pneumatic crimping and capping handheld tool A hand-held, power-operated or power-assisted, crimping/er or decapping/er tool (60), for container closures, such as vial caps (C), has a hollow handle (50), housing a (pneumatic) piston-in-cylinder actuator (12, 13), with an external trigger (... | 05/04/2004 |
| 6679092 | Automobile sheet metal surface correcting equipment An automobile sheet metal surface correcting equipment capable of permitting alignment between a piston of the equipment and a portion of the sheet metal surface to be corrected to be carried out from an inside of the sheet metal such as a bonnet, to ther... | 01/20/2004 |
| 6508099 | Hemming machine A hemming machine is disclosed having a base, a nest adapted to support a part to be hemmed, a nest carrier which supports the nest and in which both the nest and nest carrier are vertically movably mounted to the base. At least one hemming die is lateral... | 01/21/2003 |
| 6487888 | Hemming machine A hemming machine is disclosed having a base, a nest adapted to support a part to be hemmed, a nest carrier which supports the nest and in which both the nest and nest carrier are vertically movably mounted to the base. At least one hemming die is lateral... | 12/03/2002 |
| 6401516 | Hydraulic drive system for forging press or forging machine slides The invention relates to a hydraulic drive system for the tool-bearing slide of a forging press or a forging machine. The slide is configured as a piston and is provided with a valve seat at the opposite end of the tool, that is, the end which is impinged... | 06/11/2002 |
| 6250128 | Forging die and upset forging method An upset forging die device and method are provided for upset-forging a raw material that is being filled in a cavity of a lower molding die at a portion between an upper punch of an upper molding die provided on a slide and a lower punch of the lower mol... | 06/26/2001 |
| 6122952 | Multiple actuation press for metal working and method of metal forming A forming press that can perform multiple actuations within a single forming press, and which can be done accurately and with reduced overall machine size requirements. A first component side of the forming press can comprise multiple forming components, ... | 09/26/2000 |
| 5979210 | Drawing device for a press with control device for maintaining pressure during press stoppage A drawing device for a press is provided with a drawing slide, with a sheet holder having a sheet held therein, and with a pressure cheek which is arranged under the sheet holder and is connected with a piston rod which can be displaced in parallel to the... | 11/09/1999 |
| 5862701 | Apparatus for manufacturing steering rack bars A forging die for forming a steering rack portion having teeth and two longitudinally extending guide faces from a blank. The die comprising first (18) and second (19) die members and four forming elements (52, 53, 54, 55) to converge on the blank. The fi... | 01/26/1999 |
| 5829289 | Method of controlling a crimp press for crimping an assembly A method of controlling a crimp press for crimping an assembly includes the steps of placing an assembly in an open crimp die of a crimp press, advancing a ram of the crimp press to a predetermined position to close the crimp die, determining whether a pr... | 11/03/1998 |
| 5730021 | Air hammer bit Air hammer bit for use with an air hammer. The bit includes a shaft having a longitudinal axis extending therethrough. A mechanism is integral the shaft for coupling the bit to the air hammer. A bit head extends from the shaft having a center axis which i... | 03/24/1998 |
| 5651282 | Method of controlling a crimp press for crimping a hose assembly A method of controlling a crimp press for crimping a hose assembly includes the steps of placing a hose assembly in an open crimp die of a crimp press, advancing a ram of the crimp press to a predetermined position to close the crimp die, determining whet... | 07/29/1997 |
| 5598737 | Portable, power driven punch press for working on steel frame members A portable punch press suitable for bending, cutting or otherwise working on steel frame members at sites of construction. Included is a C shaped frame erected on a bed for upstandingly carrying a hydraulic cylinder in overlying relationship to the bed. A... | 02/04/1997 |
| 5582059 | Forging machine The invention relates to forging machines which are provided with in particular four rams which are arranged offset at 90° to one another in a cruciform manner in one plane, act radially upon the workpiece, guided longitudinally in the system axis, and a... | 12/10/1996 |
| 5555757 | Flat die thread roller A flat die thread rolling machine provides a cam drive for the reciprocating slide which operates through a linkage to cause reciprocation of the slide. The cam provides a dwell which holds the reciprocating die stationary before the commencement of the w... | 09/17/1996 |
| 5481899 | Pressure differential downset apparatus The edges of a semiconductor die are moved away from the lead frame leads attached to the die by using a pressure differential across the semiconductor die.... | 01/09/1996 |
| 5463887 | Device for the preparation of used metal barrels with a view to facilitating handling and recycling thereof The device embodying the invention uses a hydraulic press activating a mobile plate in a chamber opposite a base on which a metal barrel can be disposed, and successively comprises: the placing and maintaining of the barrel on the base; the perforating of... | 11/07/1995 |
| 5440912 | Form and punch apparatus An apparatus is provided to form a workpiece to a net position and pierce a hole in the workpiece. The apparatus includes a base having an inner and outer slide assembly mounted thereon for reciprocal movement. Both the inner and outer slides include a cy... | 08/15/1995 |
| 5433097 | Hydraulic control for press brakes A method and apparatus for controlling the stopping position of a press brake punch is provided. Hydraulic control is provided so that the variations in punch stopping positions due to variations in manifold valve response times are minimized. A variable ... | 07/18/1995 |
| 5417098 | Hydraulic feed drive for flying upsetting presses Hydraulic feed drives for pressing tools of a flying upsetting press are integrated into closed hydraulic circuits and are driven by displacement pumps, with the hydraulic circuits being pressurized in order to improve the flow dynamics, and with internal... | 05/23/1995 |
| 5379628 | Drive for shifting the stroke position of forming machines A method of controlling the drive of a forming machine, in particular of a hydraulic press or hydraulically driven forging machine, having at least one pump cylinder actuated by a crank-type driving mechanism and having return cylinders subjected to const... | 01/10/1995 |
| 5313816 | Forging machine with stroke adjustment means A forging machine has a machine frame (1), radial forging rams (2) each adapted to carry a die (5), distributed angularly in a common working plane around the system axis (5); radial pressure-fluid piston (12) and cylinder (11) units on the machine frame,... | 05/24/1994 |
| 5301533 | Cam operated pierce apparatus A workpiece engaging apparatus includes a drive having a linearly reciprocal drive member. Two pairs of arms are arranged in opposed, inverted relationship with respect to each other and are pivotally connected at one end to the drive. Each arm has a cam ... | 04/12/1994 |
