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Title: Variable delivery, fixed displacement pump

Abstract

A variable delivery, fixed displacement pump comprises a plurality of pistons reciprocated within corresponding cylinders in a cylinder block. The pistons are reciprocated by rotation of a fixed angle swash plate connected to the pistons. The pistons and cylinders cooperate to define a plurality of fluid compression chambers each have a delivery outlet. A vent port is provided from each fluid compression chamber to vent fluid therefrom during at least a portion of the reciprocal stroke of the piston. Each piston and cylinder combination cooperates to close the associated vent port during another portion of the reciprocal stroke so that fluid is then pumped through the associated delivery outlet. The delivery rate of the pump is varied by adjusting the axial position of the swash plate relative to the cylinder block, which varies the duration of the piston stroke during which the vent port is closed.

Inventors:
 [1]
  1. Sparland, IL
Publication Date:
Research Org.:
Caterpillar Inc. (Peoria, IL)
OSTI Identifier:
873890
Patent Number(s):
US 6267561
Assignee:
Caterpillar Inc. (Peoria, IL)
DOE Contract Number:  
FC05-97OR22605
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
variable; delivery; fixed; displacement; pump; comprises; plurality; pistons; reciprocated; corresponding; cylinders; cylinder; block; rotation; angle; swash; plate; connected; cooperate; define; fluid; compression; chambers; outlet; provided; chamber; therefrom; portion; reciprocal; stroke; piston; combination; cooperates; close; associated; pumped; rate; varied; adjusting; axial; position; relative; varies; duration; closed; cylinder block; piston stroke; axial position; pump comprises; displacement pump; variable delivery; fixed displacement; /417/

Citation Formats

Sommars, Mark F. Variable delivery, fixed displacement pump. United States: N. p., 2001. Web.
Sommars, Mark F. Variable delivery, fixed displacement pump. United States.
Sommars, Mark F. Mon . "Variable delivery, fixed displacement pump". United States. https://www.osti.gov/servlets/purl/873890.
@article{osti_873890,
title = {Variable delivery, fixed displacement pump},
author = {Sommars, Mark F},
abstractNote = {A variable delivery, fixed displacement pump comprises a plurality of pistons reciprocated within corresponding cylinders in a cylinder block. The pistons are reciprocated by rotation of a fixed angle swash plate connected to the pistons. The pistons and cylinders cooperate to define a plurality of fluid compression chambers each have a delivery outlet. A vent port is provided from each fluid compression chamber to vent fluid therefrom during at least a portion of the reciprocal stroke of the piston. Each piston and cylinder combination cooperates to close the associated vent port during another portion of the reciprocal stroke so that fluid is then pumped through the associated delivery outlet. The delivery rate of the pump is varied by adjusting the axial position of the swash plate relative to the cylinder block, which varies the duration of the piston stroke during which the vent port is closed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

Patent:

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