HAROLD P SORENSEN
Engineering in Marblehead, MA

License number
Massachusetts 17518
Issued Date
Nov 14, 1961
Expiration Date
Jun 30, 2012
Type
Mechanical Engineer
Address
Address
Marblehead, MA 01945
LicenseFiles verified this license of Nov 24, 2016 at the Mass.gov - Consumer Affairs and Business Regulation.

Professional information

Harold Sorensen Photo 1

Pneumatically Operated Reciprocating Piston Compressor

US Patent:
5324175, Jun 28, 1994
Filed:
May 3, 1993
Appl. No.:
8/056272
Inventors:
Harold P. Sorensen - Marblehead MA
Ward H. Robinson - Newton NH
Assignee:
Northern Research & Engineering Corporation - Woburn MA
International Classification:
F04B 300
US Classification:
417254
Abstract:
A two stage free piston pneumatically operated air compressor having an integral and coaxial power piston, first stage piston and second stage piston. The discharge of the compressor first stage is the inlet for the compressor second stage. A piston-type throttling valve is used to control the speed of the reciprocating piston. The piston-type throttling valve is responsive to the pressure drop across a fixed orifice.

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