Lawrence W Cisko

52460550, Sep 21, 1993

Sep 6, 1991

7/754993

James R. Fields - Export PA
Lawrence W. Cisko - Irwin PA
Robert C. Wallace - New Kensington PA

Aluminum Company of America - Pittsburgh PA

B22D 1714

164 61

A vacuum die-casting machine has a bellows forming a sealed enclosure between the rear of the fill chamber and the piston rod. A vacuum is applied to the enclosure during evacuation of the die cavity and charging of the fill chamber with molten metal. As the piston moves forward, an inert gas at about atmospheric pressure is introduced into the enclosure and extends into the feed tube.

58361936, Nov 17, 1998

Nov 27, 1996

8/753614

Daniel E. Hunter - Export PA
Lawrence W. Cisko - Harrison City PA
Jeffrey M. Shoup - Delmont PA
Blair T. Allison - Cheswick PA
Daniel Bergstrom - Sarver PA
Peter J. Coppola - Cecil PA
Walter R. Reichelt - Bloomfield Hills MI
William A. Graham - McDonald PA

Aluminum Company of America - Pittsburgh PA

B21D 1102

72298

Apparatus and a method for forming an elongated workpiece are provided. In a first embodiment, a press has a ram and movable upper platen to which is secured a first die. Upper guide members are provided on the upper platen for movement of slide members on each responsive to movement of the platen. Lower guide elements, which cooperate in a telescoping manner with upper guide members, are secured to a lower platen. The first die cooperates with a pair of rotatable second die members which are provided with each being rotatable responsive to movement of a slide member. In a preferred embodiment, the upper guide members secured to the platens are in relative sliding contact and links connect the slide members with the rotatable second dies. In a preferred embodiment, the elongated metal workpiece may be formed by bending under the influence of the forces applied to the first die and second die members through the upper platen by the press ram. In a second embodiment, the press first die and associated guide members are not employed and forming is effected by the second die members.

53701712, Dec 6, 1994

Sep 20, 1993

8/124387

James R. Fields - Export PA
Men G. Chu - Export PA
Lawrence W. Cisko - Irwin PA
C. Edward Eckert - Plum Borough PA
Thomas R. Hornack - Lower Burrell PA
Marshall A. Klingensmith - New Kensington PA
Richard A. Manzini - Greensburg PA
M. K. Premkumar - Monroeville PA
Gerald D. Scott - Messena NY
Mohammad A. Zaidi - Monroeville PA

Aluminum Company of America - Pittsburgh PA

B22D 1720
B22D 1730

164312

The die casting machine includes a trough containing a supply of molten metal and a feed tube extending into the supply of molten metal in the trough. A flow of molten metal is maintained in the trough past the feed tube independent of the transfer of molten metal through the feed tube. The die casting machine further includes a filtering system.

57082090, Jan 13, 1998

Aug 27, 1996

8/703719

Richard C. Stiffler - Pittsburg PA
Ronald C. Wojnar - New Kensington PA
Mark F. A. Warchol - Bettendorf IA
Lawrence W. Cisko - Irwin PA
John M. Urbanic - Pittsburgh PA

Aluminum Company of America - Pittsburg PA

G01N 2928
G01N 2924

73644

An apparatus for conducting ultrasonic waves to and from a body of a molten material. The apparatus includes a buffer rod for transmitting ultrasonic waves to the molten metal, a second buffer rod for receiving ultrasonic waves from the molten metal, piezoelectric elements associated with each buffer rod, and cooling mechanisms for protecting the piezoelectric elements by maintaining the buffer rods at a prescribed rate of thermal equilibrium with the molten metal. The cooling mechanisms are configured so as to facilitate regulation of the air flow about the apparatus.

54779120, Dec 26, 1995

Sep 28, 1993

8/128590

Lawrence W. Cisko - Irwin PA
Albert C. Wang - Murrysville PA
S. John Pien - Export PA
Adam J. Sartschev - Allison Park PA

Aluminum Company of America - Pittsburgh PA

B22D 1106

164481

A roll for use in a belt caster. The roll has a plurality of axial segments, at least one of which can be adjusted to compensate for transverse distortions in the belt. Generally uniform tension is maintained transversely in the belt so that the belt remains generally planar in the portion that contacts the molten metal that is cast in the belt caster.

46696067, Jun 2, 1987

Aug 22, 1985

6/768433

Lawrence W. Cisko - Irwin PA

Aluminum Company of America - Pittsburgh PA

B65G 2504

198748

An apparatus for a moving conveyor feeder comprises an hydraulic actuator to alternatively move a shaft in opposite directions. Motion amplification is operationally coupled to the shaft to amplify the amount of motion thereof, and a conveyor feeder is operationally coupled to the motion amplification; whereby a small amount of linear movement imparted to the shaft by the hydraulic actuator results in a much larger linear movement by the conveyor feeder.

58485465, Dec 15, 1998

Nov 27, 1996

8/757403

Blair T. Allison - Cheswick PA
Daniel Bergstrom - Sarver PA
Lawrence W. Cisko - Harrison City PA
William A Graham - McDonald PA
Daniel E. Hunter - Export PA
Jeffrey M. Shoup - Delmont PA

Aluminum Company of America - Pittsburgh PA

B21D 900
B21D 1102

72296

A method of gripping a metal tubular member during a forming operation to resist damage to the gripped ends and reduce scrap, includes providing an outer tool having a recess structured to receive an end of the tubular member, inserting a resilient mandrel into the end of the tubular member and inserting the tubular member end into the recess. A compressive force is applied to the resilient member in a direction aligned generally axially of the tubular member to establish transverse expansion of the resilient member in order to clamp the tubular member end between the mandrel and the outer tool recess. The tube may be stretched beyond the yield point and formed while so clamped, after which the compressive force is removed so as to facilitate withdrawal of the formed tube. In one embodiment, the mandrel may consist of a composite which may have a lower durometer hardness inner portion and higher durometer hardness outer portions. In another embodiment, a substantially rigid mandrel is received within the tube end and an annular resilient sleeve is positioned on the outside of the tube end.

52340457, Aug 10, 1993

Sep 30, 1991

7/767643

Lawrence W. Cisko - Irwin PA

Aluminum Company of America - Pittsburgh PA

B22D 1914
B22D 1800

164 97

A squeeze-casting method is taught for manufacturing metal matrix composites which require little or no finishing operations. This method utilizes a combination of techniques, fundamentals of which are found in the investment casting, die casting and metal matrix composite-making arts. The method comprises, forming a wax pattern around the preform and investing the pattern to form a melt-impermeable shell-mold around it. The shell-mold is dewaxed leaving the preform positioned within it. The shell-mold is heated before it is placed in a die cavity of a conventional die caster for high pressure injection of molten metal. Molten metal is poured into the die cavity and pressurized with sufficient pressure and for long enough to impregnate the preform. The metal encapsulates the shell-mold which allows for equilibrated pressures within said die. The pressure is released and the shell-mold is removed from the die cavity before the molten metal in the shell-mold solidifies.