ROBERT M ANDREWS
Electrician in Plymouth, MA
License number
Massachusetts 35443
Issued Date
Feb 24, 1992
Expiration Date
Jul 31, 2004
Type
Journeyman Electrician
Address
Address
Plymouth, MA 02360
Professional information
Volumetric Dry Material Feeder
US Patent:
5215228, Jun 1, 1993
Filed:
Apr 5, 1991
Appl. No.:
7/681051
Inventors:
Robert L. Andrews - Plymouth MA
Edward A. Packard - Plymouth MA
Edward A. Packard - Plymouth MA
Assignee:
Hyer Industries, Inc. - Pembroke MA
International Classification:
A45D 2422
US Classification:
222203
Abstract:
A volumetric dry material feeder comprising a movable wall hopper. Nesting lower and end wall hopper components receive and clamp a flexible diaphragm sheet in position to overlie mutually opposing hopper walls and to receive and isolate the material therefrom. A pair of thrust plates are each located between the diaphragm and a hopper wall and alternately displaced relative thereto at differing frequencies to produce a continually varying combination of thrust plate movements.
Screw Feeder With Progressively Decreasing Screw Confinement
US Patent:
5333762, Aug 2, 1994
Filed:
May 7, 1993
Appl. No.:
8/060198
Inventors:
Robert L. Andrews - Plymouth MA
Assignee:
Hyer Industries, Inc. - Pembroke MA
International Classification:
G01F 1120
US Classification:
222238
Abstract:
A screw feeder for particulate solids comprises a trough section including a first chamber with a trough shaped side wall downwardly converging to a longitudinally tapered aperture. A screw chamber encloses a space below and connecting with the aperture. The screw chamber houses a feed screw which enters a feeder section in a transition region at the front wall of the agitator chamber. An agitator draws material away from the transition region of the agitator chamber.