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Title: Self-latching eccentric cam for dual stroke compressor or pump

Abstract

For a dual capacity refrigerant compressor of the type which has an eccentric cam rotatable on a crankpin between two opposite positions which changes the total eccentricity of the crankpin and cam so as to obtain two different stroke lengths, the rotation of the cam on the crankpin being effected by a reversal of motor operation, the cam moves through an angle of about 270[degree] around the crankpin so that a centrifugal force torque tending to hold the cam in place is available at least in the reduced stroke length position of the cam, and by providing lightening cavities and eccentric weightings, the center of mass of the cam can be shifted to obtain the centrifugal torque in the proper direction at both the maximum and reduced stroke positions. 7 figs.

Inventors:
Issue Date:
OSTI Identifier:
7152272
Patent Number(s):
4494447 A
Application Number:
PPN: US 6-438428
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (United States) PTO; EDB-94-123668
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Nov 1982
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; COMPRESSORS; DESIGN; REFRIGERATING MACHINERY; EFFICIENCY; MACHINE PARTS; OPERATION; EQUIPMENT; MACHINERY; 320303* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes

Citation Formats

Sisk, F.J. Self-latching eccentric cam for dual stroke compressor or pump. United States: N. p., 1985. Web.
Sisk, F.J. Self-latching eccentric cam for dual stroke compressor or pump. United States.
Sisk, F.J. Tue . "Self-latching eccentric cam for dual stroke compressor or pump". United States.
@article{osti_7152272,
title = {Self-latching eccentric cam for dual stroke compressor or pump},
author = {Sisk, F.J.},
abstractNote = {For a dual capacity refrigerant compressor of the type which has an eccentric cam rotatable on a crankpin between two opposite positions which changes the total eccentricity of the crankpin and cam so as to obtain two different stroke lengths, the rotation of the cam on the crankpin being effected by a reversal of motor operation, the cam moves through an angle of about 270[degree] around the crankpin so that a centrifugal force torque tending to hold the cam in place is available at least in the reduced stroke length position of the cam, and by providing lightening cavities and eccentric weightings, the center of mass of the cam can be shifted to obtain the centrifugal torque in the proper direction at both the maximum and reduced stroke positions. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}