US2743054A - Vacuum cleaners - Google Patents

Vacuum cleaners Download PDF

Info

Publication number
US2743054A
US2743054A US303890A US30389052A US2743054A US 2743054 A US2743054 A US 2743054A US 303890 A US303890 A US 303890A US 30389052 A US30389052 A US 30389052A US 2743054 A US2743054 A US 2743054A
Authority
US
United States
Prior art keywords
fan
wall
thread
annular
conical
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 - Lifetime
Application number
US303890A
Other languages
English (en)
Inventor
Preis Paul
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
Application granted granted Critical
Publication of US2743054A publication Critical patent/US2743054A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

Definitions

  • This invention relates to vacuum cleaners, and more particularly to vacuum cleaners having a dust collector disposed in the rear of the blower or fan.
  • the invention aims at obviating these drawbacks by providing a vacuum cleaner having an annular air passage in rear of the fan and having a dust collector connected by way of a substantially radially disposed discharge connection, which will dependably suck up long particles, suchv as sewing threads, shreds of cloth, orthe like, and pass them dependably into the dust collector.
  • the inner walls of the annular air guide passage following the fan are tapered towards the fan.
  • the Walls are comically tapered and con veniently surround the driving motor for the fan; Due to this tapering the pull acting on a thread drawn in a spiral around the walls is split up into aforce normal to the wall surface and a displacing force perpendicular thereto, i. e. in the direction of a conical surface line, the magnitude of the latter force being dependent on the apex angle of the cone.
  • this apex angle is so selected that the displacing force is greater than the friction of the thread against the wall resulting from the coefiicient of friction and the normal pressure.
  • the fan plate may be so embedded in the housing wall surrounding it, that the surface of the plate lies flush with the surface of the housing.
  • Figure 1 shows a vacuum cleaner blower in a vertical longitudinal section
  • Figure 2 shows a detail of Figure 1 drawn on a larger scale
  • I Figure 3 is a graphic diagram of the forces acting on an entrained particle.
  • the plate 6 of a fan lies coaxially with a suction connection 4 in a housing and is provided with blades 5.
  • the fan rotating at high speed, forces the dust-laden air sucked-in through the connection l into an annular air guide space 7, whence it passes through a radially disposed discharge connection 8 passing through the outer housing wall into a dust collector (not shown).
  • the plate 6 of the fan is slightly conical in shape, the apex of the cone facing the suction connection 4. Behind the fan plate 6 is a likewise slightly conical housing wall 9, in which the fan shaft is mounted and which is recessed to receive the fan plate 6 to such'an extent that the front surface of the plate lies flush with the surface of the housing wall.
  • the slightly conical housing wall 9 is continued a short distance outside the fan plate, and
  • annular wall 10 which is in the shape of a truncated cone, with the conical surface of smaller diameter facing the fan 5, 6.
  • the apex angle o of this cone is relatively acute and according to the invention amounts to 10 and more.
  • the driving motor (not shown) for the fan is mounted inside the truncated cone formed by the annular wall 10.
  • the conical wall 10 forms the inner wall of the annular. space 7, which has an approximately pear,- shaped cross-section and into which the air delivered by the fan 5, 6 enters approximately tangentially.
  • the air sucked in is forced by the fan 5, 6 from the suction connection 4 through the annular gap 11 into the annular space 7 of pear-shaped cross-section, whence it escapes through the discharge connection 8 into the dust collector.
  • the fan blades 5 effecting the actual movement of the air have front edges 5', which are directed transversely to the fan axis.
  • the angle a formed by the front edges 5' with the fan axis amounts to between 45 and 90.
  • the thread Due to the suction, the thread is under a tension represented by S in Figure 3, which is the resultant of a normal pressure N on the housing and a displacing force P directed along a surface line of the housing.
  • the normal pressure N in conjunction with the coefficient of friction, determines the friction of the thread on the housing. If this friction is smaller than the displacing force P, the thread will travel on the cone surface in the direction of the fan.
  • the apex angle it determines the ratio of the two forces N and P. It has been found that in order to effect the movement of the thread towards the point of the cone, a cone angle of 10 and more is sufficient. Larger cone angles, which in themselves would be more advantageous, are normally impossible owing to the desirability of a compact construction for the vacuum cleaner.
  • the thread x When the thread x has reached its bottom position and has been detached, it is seized by the blast of air from the fan, which at that point enters the annular space 7 substantially tangentially, and is guided, in accordance with the arrows in Figure 2, upwards on the outer surface of the annular space, whereby it is brought past the outlet connection.
  • the particles, particularly threads or the like thus perform in the annular space 7 a double circling movement, namely firstly a circular movement about the fan axis and additionally thereto a whirling movement about the annular axis of the air guide space.
  • a suction head for a vacuum cleaner or the like comprising, in combination, a circular housing having a central axis and being constituted by a front portion and a rear portion, said front portion being constituted by a pair of spaced inner and outer frusto-conical front walls forming between themselves a substantially frusto-conical front chamber, said inner front wall having an angle of taper which is of such magnitude that said inner front wall is slightly less than normal to said central axis and said outer front wall being formed with central opening means constituting an inlet into said front chamber, said rear portion being constituted by a pair of inner and outer rear walls, said inner rear wall being frnsto-conical and said outer rear wall being substantially J-shaperl, joining said inner rear wall at the larger edge thereof and being a continuation thereof so that said inner and outer rear walls form between themselves a rear chamber of substantially U-shaped cross-section having a continuous inner surface including an innermost frusto-conical surface portion, said inner rear wall tapering toward said inner front wall and joining
  • a suction head for a vacuum cleaner or the like comprising, in combination, a hollow housing having a central axis, an axially extending tubular inlet, and a frusto-conical outer front wall having a smaller open end joined to and forming a continuation of said inlet and a larger open end spaced from said inlet, said housing further including an annular channel of substantially U-shaped cross section surrounding said central axis, having its interior directed toward said outer front wall, and

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US303890A 1951-08-16 1952-08-12 Vacuum cleaners Expired - Lifetime US2743054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE302889X 1951-08-16

Publications (1)

Publication Number Publication Date
US2743054A true US2743054A (en) 1956-04-24

Family

ID=6108479

Family Applications (1)

Application Number Title Priority Date Filing Date
US303890A Expired - Lifetime US2743054A (en) 1951-08-16 1952-08-12 Vacuum cleaners

Country Status (6)

Country Link
US (1) US2743054A (fr)
BE (1) BE513488A (fr)
CH (1) CH302889A (fr)
FR (1) FR1061355A (fr)
GB (1) GB714808A (fr)
NL (2) NL85061C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019963A (en) * 1955-07-08 1962-02-06 Eck Bruno Christian Radial blower for gases with high dust content

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071916A (en) * 1963-01-08 figures

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR388267A (fr) * 1908-03-17 1908-08-07 L Eclairage Electr Soc Perfectionnements aux pompes hélico-centrifuges
US1042506A (en) * 1912-03-15 1912-10-29 Charles Emile Jules De Vallat Propeller.
GB419176A (en) * 1934-01-06 1934-11-07 Drysdale & Co Ltd Improvements in centrifugal pumps of the semi-axial flow type
US2040188A (en) * 1933-12-20 1936-05-12 Hoover Co Suction cleaner
GB579780A (en) * 1943-11-19 1946-08-15 John Sharpley Jones Improvements in or relating to compressors, pumps and the like
US2463976A (en) * 1942-02-21 1949-03-08 Sulzer Ag High-pressure compressor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR388267A (fr) * 1908-03-17 1908-08-07 L Eclairage Electr Soc Perfectionnements aux pompes hélico-centrifuges
US1042506A (en) * 1912-03-15 1912-10-29 Charles Emile Jules De Vallat Propeller.
US2040188A (en) * 1933-12-20 1936-05-12 Hoover Co Suction cleaner
GB419176A (en) * 1934-01-06 1934-11-07 Drysdale & Co Ltd Improvements in centrifugal pumps of the semi-axial flow type
US2463976A (en) * 1942-02-21 1949-03-08 Sulzer Ag High-pressure compressor
GB579780A (en) * 1943-11-19 1946-08-15 John Sharpley Jones Improvements in or relating to compressors, pumps and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019963A (en) * 1955-07-08 1962-02-06 Eck Bruno Christian Radial blower for gases with high dust content

Also Published As

Publication number Publication date
NL85061C (fr)
BE513488A (fr)
FR1061355A (fr) 1954-04-12
GB714808A (en) 1954-09-01
NL171377B (nl)
CH302889A (de) 1954-11-15

Similar Documents

Publication Publication Date Title
CA1096814A (fr) Sorties laterales pour cyclone separateur d'air
US6719830B2 (en) Toroidal vortex vacuum cleaner centrifugal dust separator
US6482246B1 (en) Cyclonic separating apparatus with tangential offtake conduit
JP3622300B2 (ja) 遠心送風機
US2193883A (en) Cyclone dust separator
US3372532A (en) Dry separator
US6171356B1 (en) Cyclonic vacuum generator apparatus and method
JP3832852B2 (ja) ガス流から固形あるいは液体粒子を分離する装置
US2732032A (en) sandison
GB944376A (en) Improvements in or relating to apparatus and a process for moving material
GB1501473A (en) Fans
EP0923992A2 (fr) Appareil séparateur cyclonique
EP0219448A2 (fr) Boîtier pour le ventilateur refroidi d'un moteur
CZ290391B6 (cs) Vstupní nálevkovitý díl pro odstředivé ventilátory
GB1465888A (en) Hydrocyclone
CA1048787A (fr) Methode et materiel de production de fibres minerales
US20020020035A1 (en) Toroidal vortex bagless vacuum cleaner
US3584452A (en) Evacuation means for an open end spinning device
GB953788A (en) Improvements in or relating to dust collecting apparatus
US2847087A (en) Dust collectors
US3972698A (en) Arrangement for energy recovery in the pure-gas outlet of a centrifugal separator
US2743054A (en) Vacuum cleaners
US20040139709A1 (en) Dynamic transfer chamber separator
US3775957A (en) Rotary spinning chamber for an open-end spinning machine
US4976099A (en) Sliver feeding and opening device of an open end spinning machine