DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: MOLECULAR VACUUM PUMP

Abstract

A multiple molecular vacuum pump capable of producing a vacuum of the order of 10/sup -9/ mm Hg is described. The pump comprises a casing of an aggregate of paired and matched cylindrical plates, a recessed portion on one face of each plate concentrically positioned formed by a radially extending wall and matching the similarly recessed portion of its twin plate of that pair of plates and for all paired and matched plates; a plurality of grooves formed in the radially extending walls of each and all recesses progressing in a spiral manner from their respective starting points out at the periphery of the recess inwardly to the central area; a plurality of rotors rotatably mounted to closely occupy the spaces as presented by the paired and matched recesses between all paired plates; a hollowed drive-shaft perforated at points adjacent to the termini of all spiral grooves; inlet ports at the starting points of all grooves and through all plates at common points to each respectively; and a common outlet passage presented by the hollow portion of the perforated hollowed drive-shaft of the molecular pump. (AEC)

Inventors:
Issue Date:
OSTI Identifier:
4022081
Patent Number(s):
2954157
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04D - NON-POSITIVE-DISPLACEMENT PUMPS
NSA Number:
NSA-15-024937
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
United States
Language:
English
Subject:
ENGINEERING AND EQUIPMENT; CONFIGURATION; CYLINDERS; MECHANICAL STRUCTURES; MOLECULES; PLATES; PRESSURE; PUMPS; ROTATION; SURFACES; VACUUM

Citation Formats

Eckberg, E E. MOLECULAR VACUUM PUMP. United States: N. p., 1960. Web.
Eckberg, E E. MOLECULAR VACUUM PUMP. United States.
Eckberg, E E. Tue . "MOLECULAR VACUUM PUMP". United States.
@article{osti_4022081,
title = {MOLECULAR VACUUM PUMP},
author = {Eckberg, E E},
abstractNote = {A multiple molecular vacuum pump capable of producing a vacuum of the order of 10/sup -9/ mm Hg is described. The pump comprises a casing of an aggregate of paired and matched cylindrical plates, a recessed portion on one face of each plate concentrically positioned formed by a radially extending wall and matching the similarly recessed portion of its twin plate of that pair of plates and for all paired and matched plates; a plurality of grooves formed in the radially extending walls of each and all recesses progressing in a spiral manner from their respective starting points out at the periphery of the recess inwardly to the central area; a plurality of rotors rotatably mounted to closely occupy the spaces as presented by the paired and matched recesses between all paired plates; a hollowed drive-shaft perforated at points adjacent to the termini of all spiral grooves; inlet ports at the starting points of all grooves and through all plates at common points to each respectively; and a common outlet passage presented by the hollow portion of the perforated hollowed drive-shaft of the molecular pump. (AEC)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {9}
}