GB511932A - Improvements in and relating to ventilating fans - Google Patents

Improvements in and relating to ventilating fans

Info

Publication number
GB511932A
GB511932A GB966339A GB966339A GB511932A GB 511932 A GB511932 A GB 511932A GB 966339 A GB966339 A GB 966339A GB 966339 A GB966339 A GB 966339A GB 511932 A GB511932 A GB 511932A
Authority
GB
United Kingdom
Prior art keywords
tip
blade
root
trailing edge
leading edge
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
GB966339A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB966339A priority Critical patent/GB511932A/en
Publication of GB511932A publication Critical patent/GB511932A/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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form

Abstract

511,932. Screw fans. BARKER, D. R., and BARKER, W. H. March 28, 1939, No. 9663. [Class 110 (i)] [Also in Group XXXIII] A screw ventilating fan is formed with a flat portion of its driving face toward the trailing edge and with a curved leading section arranged so that the pitch of each blade decreases progressively from the root to the tip. A section of each blade between the trailing edge 4, the root portion and a line 5 joining the outer tip of the trailing edge with the inner point of the leading edge 3 is a flat surface, whilst the remaining portion 2 between the diagonal line 5 and the leading edge 3 is bent over, whereby the pitch decreases from root to tip. The trailing edge is preferably straight, and the leading edge is convexly curved whilst the tip is formed by curve concentric with the shaft. The blade may be made from sheet metal or may have an aerofoil section. The boss is formed with an inner sleeve 7 adapted to be secured to the driving shaft and an outer sleeve 1, the two being connected by segmental ribs 8. The outer sleeve 1 is slotted at 9 to receive the blade root and the latter is bolted to the part 8 through connections 10.
GB966339A 1939-03-28 1939-03-28 Improvements in and relating to ventilating fans Expired GB511932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB966339A GB511932A (en) 1939-03-28 1939-03-28 Improvements in and relating to ventilating fans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB966339A GB511932A (en) 1939-03-28 1939-03-28 Improvements in and relating to ventilating fans

Publications (1)

Publication Number Publication Date
GB511932A true GB511932A (en) 1939-08-25

Family

ID=9876350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB966339A Expired GB511932A (en) 1939-03-28 1939-03-28 Improvements in and relating to ventilating fans

Country Status (1)

Country Link
GB (1) GB511932A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367423A (en) * 1966-06-13 1968-02-06 Cornelius W. Van Ranst Propeller
US5226804A (en) * 1990-07-09 1993-07-13 General Electric Canada Inc. Propeller blade configuration
WO1997040260A1 (en) * 1996-04-22 1997-10-30 Vitara Trading Company Ltd. Surfaces for movement of media
WO2007052626A1 (en) * 2005-11-01 2007-05-10 Global Energy Co., Ltd. Quiet propeller
CN101300169B (en) * 2005-11-01 2011-06-15 株式会社铃诗苑 Quiet propeller

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367423A (en) * 1966-06-13 1968-02-06 Cornelius W. Van Ranst Propeller
US5226804A (en) * 1990-07-09 1993-07-13 General Electric Canada Inc. Propeller blade configuration
WO1997040260A1 (en) * 1996-04-22 1997-10-30 Vitara Trading Company Ltd. Surfaces for movement of media
WO2007052626A1 (en) * 2005-11-01 2007-05-10 Global Energy Co., Ltd. Quiet propeller
KR100971937B1 (en) * 2005-11-01 2010-07-23 글로벌 에너지 가부시키가이샤 Quiet propeller
AU2006309773B2 (en) * 2005-11-01 2011-04-28 Ntn Corporation Quiet propeller
CN101300169B (en) * 2005-11-01 2011-06-15 株式会社铃诗苑 Quiet propeller
US8371819B2 (en) 2005-11-01 2013-02-12 Kabushiki Kaisha Bellsion Quiet propeller

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