David A Berry

US Patent:

7913618, Mar 29, 2011

Filed:

Jun 21, 2007

Appl. No.:

11/820827

Inventors:

Gregory S. Ferry - Milaca MN, US
David A. Berry - Fridley MN, US

Assignee:

Mate Precision Tooling, Inc. - Anoka MN

International Classification:

B44B 5/00
B44B 5/02
B41K 3/10

US Classification:

101 31, 101 18, 101 29, 101 87, 101 88, 101109

Abstract:

A punch press tool for stamping successive multicharacter impressions into a workpiece such as a piece of steel, sheet metal, or other workpiece, includes a guide body in which a stamp driver is slidably mounted for being driven downwardly toward the workpiece by a punch press ram which is a standard part of a high speed commercial punch press. A multicharacter marking stamp is supported at the lower end of the stamp driver for reciprocal movement therewith. The marking stamp includes multicharacter wheels that are rotated automatically during operation for advancing characters in sequence responsive to the movement of a character advancing arm. At least one character stamp operating lever is operatively associated with the punch press tool for articulation responsive to motion imparted to the tool by the ram. The lever has an operating element that is operatively associated with the character advancing arm of the multicharacter stamp for indexing the arm to enable successive characters thereof to be placed in an operating position responsive to a stroke of the punch press ram.

US Patent:

7954404, Jun 7, 2011

Filed:

Apr 29, 2008

Appl. No.:

12/150551

Inventors:

Bruce Thielges - Fridley MN, US
David A. Berry - Fridley MN, US

Assignee:

Mate Precision Tooling, Inc. - Anoka MN

International Classification:

B26D 7/00

US Classification:

83140, 8369811, 8369891, 83684

Abstract:

A punch assembly for a punch press has a punch housing with a punch that is slideably mounted for reciprocation along punch axis within the punch housing and at least one resilient member in the housing for yieldably biasing the punch upwardly in the housing along the punch axis. A punch length adjustment subassembly is provided in the punch housing. The subassembly has a base member that is slideable axially but non-rotatably mounted within the housing and a punch head member having an upper end that is positioned to be struck by a punch ram of a punch press for driving the punch downwardly to an operating position. The punch head is mounted for rotation on the punch axis relative to the base member but is held against axial movement relative to the base member. The punch head is operatively associated by a threaded length adjustment connection to the punch and a releasable stop member is connected between the punch head and the base member for preventing rotation of the punch head relative to the base member while the punch assembly is in operation on the punch press. The invention is also directed to the punch head subassembly per se as a retrofit insert to update existing punch assemblies for manual tooless punch length adjustment and tooless punch removal.

US Patent:

61961035, Mar 6, 2001

Filed:

Aug 17, 1998

Appl. No.:

9/135358

Inventors:

Joseph Charles Schneider - Ramsey MN
David A. Berry - Fridley MN

Assignee:

Mate Precision Tooling Inc. - Anoka MN

International Classification:

B26P 508

US Classification:

83635

Abstract:

A punch guide assembly includes a retaining clip for retaining the stripper plate inside the punch guide or allowing removal thereof without disassembly of any of the remaining components of the punch tool. The retaining clip is easily insertable into the punch guide and removable therefrom through an opening in the sidewall of the punch guide without the use of additional tools.

US Patent:

57414297, Apr 21, 1998

Filed:

May 31, 1995

Appl. No.:

8/455331

Inventors:

James V. Donadio - Chaska MN
David R. Holmes - Rochester MN
Robert S. Schwartz - Rochester MN
David Berry - Longmont CO

Assignee:

Cardia Catheter Company - St. Paul MN

International Classification:

B44C 122
C23F 102
A61M 2500

US Classification:

216 8

Abstract:

Manufacturing processes for apparatus, including slotted hypotube, for use as a catheter, a guidewire, a catheter sheath for use with catheter introducers or a drug infusion catheter/guidewire are disclosed. The manufacturing process includes creating a pattern of slots or apertures in a flexible metallic tubular member, by processes including but not limited to, electrostatic discharge machining (EDM), chemical milling, ablation and laser cutting. These slots or apertures may be cut completely or partially through the wall of the flexible metallic tubular member. These manufacturing processes may include the additional step of encasing the flexible metallic member such that a fluid tight seal is formed around the periphery of the tubular member.