Richard L Wendt

US Patent:

53036590, Apr 19, 1994

Filed:

Jan 10, 1992

Appl. No.:

7/819181

Inventors:

Robert M. Berlin - Linwood MI
Richard L. Wendt - Midland MI
Warren L. Zeigler - Midland MI
Waynne R. Zeigler - Freeland MI

Assignee:

Zeigler Enterprises - Midland MI

International Classification:

A47B 8300
F23J 1100

US Classification:

108 50

Abstract:

A down draft work table useful in removing obnoxious fumes and gases. The work table comprises a support structure which contains a flat top mounted on an open-topped V-bottomed down draft chamber. The down draft chamber is attached such that one end of the V-bottom is lower than the opposite end of the V-bottom. The down draft chamber is assisted in the removal of gases by a series of air ducts and an air flow package. At least two work tables can be connected together in tandem through the air flow package.

US Patent:

47748788, Oct 4, 1988

Filed:

Nov 12, 1986

Appl. No.:

6/929058

Inventors:

Robert M. Berlin - Linwood MI
Richard L. Wendt - Midland MI
Warren L. Ziegler - Midland MI

Assignee:

Tri City Laboratory Specialists, Inc. - Midland MI

International Classification:

F23J 1100

US Classification:

981153

Abstract:

What is disclosed is a new and novel fume hood sash operator system and a fume hood containing such a system. The sash operator is constructed to operate from a pressure fluid cylinder so that the sash member can be stopped, started, moved up or down to accommodate changes in the flow of air moving through the hood structure and to provide a safe, durable, energy savings sash operating system.

US Patent:

45023751, Mar 5, 1985

Filed:

Aug 18, 1983

Appl. No.:

6/524456

Inventors:

Alan L. Hignite - Midland MI
Richard L. Wendt - Midland MI
Roy F. Zeigler - Freeland MI
Warren L. Zeigler - Midland MI

Assignee:

Tri City Laboratory Specialists, Inc. - Midland MI

International Classification:

F23J 1100

US Classification:

98115LH

Abstract:

What is disclosed is a new and novel fume hood sash operator system and a fume hood containing such a system. The sash operator is constructed to operate with a belt drive and a clutch mechanism so that the sash member can be stopped, started, moved up or down to accommodate changes in the flow or air moving through the hood structure and to provide a safe, durable, energy-saving sash operating system.

US Patent:

60246383, Feb 15, 2000

Filed:

May 22, 1998

Appl. No.:

9/083322

Inventors:

Robert L. Berlin - Linwood MI
Richard L. Wendt - Midland MI
Warren L. Zeigler - Midland MI

International Classification:

B08B 1502

US Classification:

454 56

Abstract:

A fume hood having a trimodal piston driven sash operator which have been improved by the addition of a travel interference system for the moveable sash to prevent accidents and the possible breakage of glassware and the like.