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| Number | Title | Issue Date |
| 6276258 | Pressure activated piston and cylinder unit for use in a die A pressure activated piston and cylinder unit for use with a die block is taught which provides installation and service portions at the rear face of the unit. Also provided is a pressure activated piston and cylinder unit for use with a die block, of sim... | 08/21/2001 |
| 6257035 | Compressive hydroforming Forming a tubular workpiece by applying fluid pressure to the interior of the workpiece and enclosing the pressurized workpiece in a die that has a die cavity. A portion or the whole of the die cavity has its internal periphery smaller than the external p... | 07/10/2001 |
| 6154944 | Method for expansion forming of tubing A frame member of rectangular cross section with rounded corners is formed by expansion of a tubular blank within a die cavity having an inner portion of corresponding cross section and an outer transition portion which is of smoothly continuously curved ... | 12/05/2000 |
| 6067830 | Method and apparatus for forming opposing holes in a side wall of a tubular workpiece A method of cutting opposing holes in a side wall of a tubular workpiece and removing the cut out slugs, in which first and second axially aligned punches are applied to opposite side walls of a pressurized workpiece. The second punch has a larger width t... | 05/30/2000 |
| 5511404 | Seal head for tube expansion apparatus Apparatus for fluid filling and pressurizing a tube having a high pressure-low flow fluid circuit in the form of a shaft having a longitudinal bore communicating with a high pressure fluid source, a tube seal device adjacent the forward end of the shaft f... | 04/30/1996 |
| 5445002 | Fill and pressurization apparatus Fill and pressurization apparatus having a sectional fluid conductor having a first section fixed relative to the surroundings, and a second section which moves toward the first section to form an enclosure through which a high volume flow rate--low press... | 08/29/1995 |
| 5235836 | Seal head for tube expansion apparatus An apparatus is provided for filling a tube with fluid and for pressurizing the tube, in order to expand and form it within a die for example. The apparatus provides a high flow-low pressure fluid circuit for quickly filling and draining the tube, togethe... | 08/17/1993 |
| 5051393 | Vehicle exhaust gas catalysts A method for the catalytic oxidation of carbon monoxide and unburnt hydrocarbon components of vehicle exhaust gas streams is disclosed. The method comprises using as the catalyst a mixed oxide catalyst composition consisting essentially of tin (IV) oxide ... | 09/24/1991 |
| 4989482 | Method and apparatus for punching a hole in sheet material A method of and apparatus for punching a hole in sheet material is provided using pressurized fluid as the female die together with a modified male punch. The slug of material to be sheared from the material is during and after shearing continuously held ... | 02/05/1991 |
| 4829803 | Method of forming box-like frame members A box-like frame member is formed by compressing an internally-pressurized tubular blank within a die having a cavity conforming to the final box-like cross section desired for the product, and increasing the pressure to exceed the yield limit of the wall... | 05/16/1989 |
