John Houston Terrell

US Patent:

41110307, Sep 5, 1978

Filed:

Apr 15, 1977

Appl. No.:

5/787990

Inventors:

Lynn R. Shepard - Berea OH
John B. Terrell - Solon OH

Assignee:

Teledyne Industries, Inc. - Cleveland OH

International Classification:

B21D 2222

US Classification:

72351

Abstract:

An improved press cushion includes a piston which is disposed within a cylinder chamber. The head end of the cylinder chamber is arranged for communication with a compressed fluid, such as nitrogen gas. The rod end of the cylinder chamber is arranged for communication with a source of air which is free of contaminants found in the immediate environment of the cylinder assembly. Although clean air could be obtained from the atmosphere at a location spaced from the press, the rod end of the cylinder is advantageously connected to a low pressure supply of clean air.

US Patent:

52208206, Jun 22, 1993

Filed:

Oct 21, 1991

Appl. No.:

7/780127

Inventors:

John B. Terrell - Chardon OH
Michael B. Budai - Hendersonville TN

Assignee:

Teledyne Industries Inc. - Cleveland OH

International Classification:

B21D 2402

US Classification:

7245313

Abstract:

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 of fluid pressure to cushion movement of the member. A flexible diaphragm retains a body of lubricant between an inner side of the diaphragm and the piston. The body of lubricant lubricates a seal between the piston and the cylinder. Fluid pressure is applied against the outer side of the diaphragm to oppose movement of the piston during operation of the press from the open condition to the closed condition. The piston is movable relative to the cylinder, under the influence of the fluid pressure applied against the outer side of the diaphragm and transmitted to the piston, during operation of the press from the closed condition to the open condition. The piston and diaphragm are spaced apart with the body of lubricant filling the space between the piston and diaphragm.

US Patent:

50038079, Apr 2, 1991

Filed:

Oct 30, 1989

Appl. No.:

7/429200

Inventors:

John Terrell - Moreland Hills OH
Paul M. Kadis - Chardon OH
Leonard L. Hiney - Ravenna OH
Susan E. Pfaff - Seven Hills OH

Assignee:

Teledyne Industries, Inc. - Cleveland OH

International Classification:

B21D 2408

US Classification:

72351

Abstract:

A press assembly is operable from the open condition to a closed condition to deform a workpiece. The press assembly is the operable from the closed condition to an open condition to facilitate removal of the deformed workpiece from the press assembly. During operation of the press assembly, the workpiece is held by upper and lower draw rings or members which apply pressure to opposite sides of the workpiece. A cushion assembly is operable to provide a yieldable force opposing movement of the draw rings. As the press is operated from the open condition to the closed condition, the lower draw ring is accelerated while the upper draw ring is spaced from the lower draw ring. This reduces shock loading on the press when the upper draw ring and workpiece subsequently impact against the lower draw ring to grip the workpiece. To effect acceleration of the lower draw ring, force is transmitted from the upper draw ring to the cushion assembly to retract the cushion assembly prior to impacting of the upper draw ring and workpiece against the lower draw ring. During operation of the press assembly to the open condition, the lower draw ring is decelerated relative to the upper draw ring before the lower draw ring reaches its initial or open press condition.