GB1247761A - Improvements in and relating to power ventilators - Google Patents

Improvements in and relating to power ventilators

Info

Publication number
GB1247761A
GB1247761A GB1722369A GB1722369A GB1247761A GB 1247761 A GB1247761 A GB 1247761A GB 1722369 A GB1722369 A GB 1722369A GB 1722369 A GB1722369 A GB 1722369A GB 1247761 A GB1247761 A GB 1247761A
Authority
GB
United Kingdom
Prior art keywords
housing
guide baffle
cowl
april
baffle
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
GB1722369A
Inventor
Lionel Evelyn Flatt
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.)
Powrmatic Ltd
Original Assignee
Powrmatic 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 Powrmatic Ltd filed Critical Powrmatic Ltd
Priority to GB1722369A priority Critical patent/GB1247761A/en
Publication of GB1247761A publication Critical patent/GB1247761A/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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Abstract

1,247,761. Ventilators. POWRMATIC Ltd. 2 April, 1970 [2 April, 1969], No. 17223/69. Heading F4V. In a power ventilator comprising an axial flow fan 20 located within a housing 10, and a rectangular dish shaped weather cowl 24 supported by means of brackets 23 in spaced relation to the outlet end of the housing 10, a circular or polygonal guide baffle 30 is located between the periphery of the outlet end of the housing and the cowl. The baffle serves to reduce turbulence. As shown the guide baffle 30 comprises an annulus of metal coated with polyvinyl chloride and has an arcuate crosssection. In an alternative embodiment (Figs. 3 and 4, not shown) the guide baffle is of square shape and is made up of four longitudinal strips (31) each having two longitudinal bends therein to define a cross-section substantially the same as that shown in Fig. 1. Closure flaps 26 supported by hinge rods 25 are arranged to open, and be kept open, by the pressure of air being discharged from the ventilator.
GB1722369A 1969-04-02 1969-04-02 Improvements in and relating to power ventilators Expired GB1247761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1722369A GB1247761A (en) 1969-04-02 1969-04-02 Improvements in and relating to power ventilators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1722369A GB1247761A (en) 1969-04-02 1969-04-02 Improvements in and relating to power ventilators

Publications (1)

Publication Number Publication Date
GB1247761A true GB1247761A (en) 1971-09-29

Family

ID=10091399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1722369A Expired GB1247761A (en) 1969-04-02 1969-04-02 Improvements in and relating to power ventilators

Country Status (1)

Country Link
GB (1) GB1247761A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406216A (en) * 1981-05-08 1983-09-27 Philips Industries, Inc. Ventilator device and mounting arrangement therefor
US5620370A (en) * 1993-12-02 1997-04-15 Mitsubishi Denki Kabushiki Kaisha Blowing apparatus, suction panel therefor and straightening guide therefor
GB2511518A (en) * 2013-03-05 2014-09-10 Nuaire Ltd A dual inlet extract fan assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406216A (en) * 1981-05-08 1983-09-27 Philips Industries, Inc. Ventilator device and mounting arrangement therefor
US5620370A (en) * 1993-12-02 1997-04-15 Mitsubishi Denki Kabushiki Kaisha Blowing apparatus, suction panel therefor and straightening guide therefor
GB2511518A (en) * 2013-03-05 2014-09-10 Nuaire Ltd A dual inlet extract fan assembly
GB2511518B (en) * 2013-03-05 2018-11-28 Nuaire Ltd A dual inlet extract fan assembly

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