GB1341604A - Fan with variable pitch baldes - Google Patents

Fan with variable pitch baldes

Info

Publication number
GB1341604A
GB1341604A GB1341604DA GB1341604A GB 1341604 A GB1341604 A GB 1341604A GB 1341604D A GB1341604D A GB 1341604DA GB 1341604 A GB1341604 A GB 1341604A
Authority
GB
United Kingdom
Prior art keywords
weight
blade
fan
hub
blades
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
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.)
LONG HAMBLY Ltd
Original Assignee
LONG HAMBLY 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 LONG HAMBLY Ltd filed Critical LONG HAMBLY Ltd
Publication of GB1341604A publication Critical patent/GB1341604A/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
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1341604 Axial-flow fans LONG & HAMBLY Ltd 6 April 1972 [3 May 1971] 12775/71 Heading F1C In a fan having variable pitch impeller blades 20 a weight 23 is connected to each blade 20 such that outward movement of the weight under centrifugal force causes the blade to rotate to reduce its pitch. Blades 20, rotatably supported by spindles 21 in recesses 14 in a two part hub 11a, 11b, are secured against longitudinal movement by pins or discs 22 locating in grooves 17. Weight 23 is provided with projections 24, 25 which locate in radially extending slots 16 in the hub and in angularly extending slots 27 in the spindle - thus when weight 23 moves radially the blade is rotated. The weight is held against radial movement during standstill and low speed of the fan by a spring or rubber insert 26. The blades 20 may be assymetrically arranged on the hub to reduce noise. In a further embodiment, Figs. 3 to 5, (not shown), the weights (34) are mounted within the blade spindles 32 and means are provided for selectively determining the maximum reduction in pitch.
GB1341604D 1972-04-06 1972-04-06 Fan with variable pitch baldes Expired GB1341604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1277571 1972-04-06

Publications (1)

Publication Number Publication Date
GB1341604A true GB1341604A (en) 1973-12-25

Family

ID=10010900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1341604D Expired GB1341604A (en) 1972-04-06 1972-04-06 Fan with variable pitch baldes

Country Status (1)

Country Link
GB (1) GB1341604A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653982A (en) * 1983-04-01 1987-03-31 Yamaha Hatsudoki Kabushiki Kaisha Windmill with controller for controlling rotor RPM
CN112220367A (en) * 2020-09-30 2021-01-15 宁波方太厨具有限公司 Fan blade structure for cooking equipment and oven with structure
WO2022016961A1 (en) * 2020-07-19 2022-01-27 卓见 Multifunctional smart fan lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653982A (en) * 1983-04-01 1987-03-31 Yamaha Hatsudoki Kabushiki Kaisha Windmill with controller for controlling rotor RPM
WO2022016961A1 (en) * 2020-07-19 2022-01-27 卓见 Multifunctional smart fan lamp
CN112220367A (en) * 2020-09-30 2021-01-15 宁波方太厨具有限公司 Fan blade structure for cooking equipment and oven with structure

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee