David Taylor Berry

US Patent:

49216651, May 1, 1990

Filed:

Mar 11, 1988

Appl. No.:

7/166879

Inventors:

Erhard Klar - Beachwood OH
Mark Svilar - Orange Village OH
David F. Berry - Westlake OH

Assignee:

SCM Metal Products, Inc. - Cleveland OH

International Classification:

C22F 100

US Classification:

419 23

Abstract:

The present invention relates to porous powder metal (P/M) parts having improved dynamic properties such as impact and fatigue strength. These properties are achieved by the use of finer metal powders.

US Patent:

49767780, Dec 11, 1990

Filed:

Jun 23, 1988

Appl. No.:

7/210579

Inventors:

David F. Berry - Westlake OH
Erhard Klar - Beachwood OH
Mark Svilar - Orange OH

Assignee:

SCM Metal Products, Inc. - Cleveland OH

International Classification:

B22F 100

US Classification:

75254

Abstract:

The present invention relates to an infiltrated ferrous powder metal part containing certain additives, yielding a part having improved dimensional control during infiltration and uniform and predictable distribution of dynamic properties within a given group of commonly manufactured parts.

US Patent:

48613738, Aug 29, 1989

Filed:

Mar 8, 1988

Appl. No.:

7/165587

Inventors:

Erhard Klar - Beachwood OH
Mark Svilar - Orange Village OH
David F. Berry - Westlake OH

Assignee:

SCM Metal Products, Inc. - Cleveland OH

International Classification:

C22C 2914

US Classification:

75244

Abstract:

The present invention relates to an infiltrated ferrous powder metal part containing certain additives, yielding a radically improved unnotched impact strength without sacrificing tensile strength. Fatigue strength is also improved. In addition, improved dimensional control is obtained during infiltration. The microstructure is also improved, with smoothing or rounding of the formerly sharp angled copper filled pores. The invention also comprises the method of achieving these results.

US Patent:

55751768, Nov 19, 1996

Filed:

Dec 30, 1994

Appl. No.:

8/367845

Inventors:

Henry W. Rohrs - West Lafayette IN
David Berry - Longmont CO

International Classification:

B25J 108
F16J 1550

US Classification:

7447901

Abstract:

This invention provides an apparatus or manipulator for positioning objects within a sealed chamber. The inventive positioning apparatus has a stator (or sleeve) sized and shaped for receiving a substantially cylindrical outer rotatable element. The outer element is rotatable with respect to the stator. The outer element has an eccentrically bored longitudinal passage sized and shaped for receiving an inner rotatable element. The inner and outer rotatable elements are independently rotatable with respect to each other. The object to be positioned in the sealed chamber is eccentrically mounted on the internal end face of the inner element such that relative rotation of the inner and outer element translates the mounted object in an X-Y plane perpendicular to the axis of the outer element. Relative rotation of the inner and outer elements allows two-dimensional object positioning. The inner element or outer element or both can be linearly translated along their axes to provide a third dimension of positioning parallel to the axes (Z-direction).