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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 74 of the cam can be shifted to obtain the centrifugal torque in the proper direction at both the maximum and reduced stroke positions.

Inventors:
 [1]
  1. (San Mateo, CA)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865314
Patent Number(s):
4494447
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
self-latching; eccentric; dual; stroke; compressor; pump; capacity; refrigerant; type; rotatable; crankpin; opposite; positions; changes; total; eccentricity; obtain; lengths; rotation; effected; reversal; motor; operation; moves; angle; 270; degree; centrifugal; force; torque; tending; hold; available; reduced; length; position; providing; lightening; cavities; weightings; center; mass; 74; shifted; proper; direction; maximum; refrigerant compressor; centrifugal force; stroke length; opposite positions; motor operation; dual capacity; opposite position; /92/74/417/

Citation Formats

Sisk, Francis J. Self-latching eccentric cam for dual stroke compressor or pump. United States: N. p., 1985. Web.
Sisk, Francis J. Self-latching eccentric cam for dual stroke compressor or pump. United States.
Sisk, Francis J. Tue . "Self-latching eccentric cam for dual stroke compressor or pump". United States. https://www.osti.gov/servlets/purl/865314.
@article{osti_865314,
title = {Self-latching eccentric cam for dual stroke compressor or pump},
author = {Sisk, Francis 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 74 of the cam can be shifted to obtain the centrifugal torque in the proper direction at both the maximum and reduced stroke positions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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