Michael L Pizzarella

age ~81

from Shrewsbury, MA

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Also known as:

Connected to:

Address:

Shrewsbury, MA 01545

License #:

94732 - Expired

Issued Date:

Nov 1, 1976

Expiration Date:

Sep 9, 1983

Type:

Broker

Address:

Shrewsbury, MA 01545

License #:

9021335 - Expired

Issued Date:

Apr 19, 1997

Expiration Date:

Sep 9, 2001

Type:

Salesperson

Name / Title

Company / Classification

Phones & Addresses

Michael Pizzarella
Manager

A. P. Fish Co., Inc
Whol Fish/Seafood

1059 Grafton St, Worcester, MA 01604
508 753-7744, 508 791-2072

Counterbalance Mechanism
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US Patent:

49532561, Sep 4, 1990
Filed:

Feb 6, 1989
Appl. No.:

7/306733
Inventors:

Gordon O. Salmela - Lexington MA
Michael L. Pizzarella - Shrewsbury MA
Assignee:

Raytheon Company - Lexington MA
International Classification:

E05D 1300
F16M 1100
US Classification:

16 1C
Abstract:

A counterbalance mechanism for negating the force of gravity when moving a display cabinet shelf up or down. The mechanism has a torsion spring counterbalance on a shaft extending the width of the shelf and gears at each end of the shaft which engage travelling rack gears attached beneath each end of the shelf. The shelf includes integral guide rails rolling on four bearings attached to the stationary frame of the cabinet. The use of spiral gears compensates for the spring torque variation and provides constant tangential gear force on the shelf regardless of the vertical position of the shelf. Having gears at each side of the moving shelf joined by a common shaft minimizes side-to-side tilting.

Michael Pizzarella Phones & Addresses