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GB995084A - Improvements in or relating to rotary pumps - Google Patents

Improvements in or relating to rotary pumps

Info

Publication number
GB995084A
GB995084A GB2402760A GB2402760A GB995084A GB 995084 A GB995084 A GB 995084A GB 2402760 A GB2402760 A GB 2402760A GB 2402760 A GB2402760 A GB 2402760A GB 995084 A GB995084 A GB 995084A
Authority
GB
United Kingdom
Prior art keywords
stage
stages
pump
piston
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2402760A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGN Ltd
Original Assignee
NGN Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGN Ltd filed Critical NGN Ltd
Priority to GB2402760A priority Critical patent/GB995084A/en
Publication of GB995084A publication Critical patent/GB995084A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/32—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
    • F04C18/324—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

995,084. Rotary exhausters. N. G. N. Ltd., and BRYMNER R. June 30, 1961 [July 9, 1960], No. 24027/60. Heading F1F. A two-stage vacuum pump comprises coaxial cylindrical casings 12, 15 each containing a piston 39 mounted on an eccentric 40 rotated by a common drive shaft 11 and a vane 44 sliding in a slot in the casing and hinged to the piston. The pistons of the two stages are 180 degrees out of phase, and the two vanes lie in the same plane and are inclined from the vertical. The transfer plate 18 which separates the two stages is formed with two oblique passages 52, 53 which connect the outlet side of the first stage (in the casing 12) to the inlet side of the second stage. The outlet from the second stage comprises several openings 46 arranged in the same longitudinal plane, covered by a sheet 49 of synthetic rubber formed with a split which serves as a non-return valve. The pump is immersed in an oil bath, and is lubricated by oil leaking into the second stage by way of the vane groove 43. The vane groove of the first stage is covered to prevent such leakage. A small amount of air is allowed to enter the second stage on the discharge side by passages 62. The pump may have more than two stages, adjacent stages being separated by transfer plates 18.
GB2402760A 1960-07-09 1960-07-09 Improvements in or relating to rotary pumps Expired GB995084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2402760A GB995084A (en) 1960-07-09 1960-07-09 Improvements in or relating to rotary pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2402760A GB995084A (en) 1960-07-09 1960-07-09 Improvements in or relating to rotary pumps

Publications (1)

Publication Number Publication Date
GB995084A true GB995084A (en) 1965-06-16

Family

ID=10205217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2402760A Expired GB995084A (en) 1960-07-09 1960-07-09 Improvements in or relating to rotary pumps

Country Status (1)

Country Link
GB (1) GB995084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013124518A1 (en) * 2012-02-07 2013-08-29 Novoro Oy Method and arrangement for improving the operation of a rotary piston engine
EP2418386A4 (en) * 2009-04-10 2014-07-23 Panasonic Corp ROTARY COMPRESSOR

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418386A4 (en) * 2009-04-10 2014-07-23 Panasonic Corp ROTARY COMPRESSOR
WO2013124518A1 (en) * 2012-02-07 2013-08-29 Novoro Oy Method and arrangement for improving the operation of a rotary piston engine

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