Vacuum cleaners

• US 4,072,483 A
• Filed: 05/20/1976
• Issued: 02/07/1978
• Est. Priority Date: 05/20/1976
• Status: Expired due to Term

• Current Assignee: Doyle Vacuum Cleaner Company
• Original Assignee: Doyle Vacuum Cleaner Company
• Inventors: Doyle, Dewey I. Jr.
• Primary Examiner(s): Moore, Christopher K.
• Application Number:
  US05/688,111
• Time in Patent Office: 628 Days
• Field of Search: 15/347, 55/372, 55/379, 55/485, 55/498, 55/DIG. 2, 55/467
• US Class Current: 55/372
• CPC Class Codes: A47L 5/365 of the vertical type, e.g. tank or bucket type
• CPC Class Codes: A47L 9/125 funnel-shaped
• CPC Class Codes: A47L 9/127 tube- or sleeve-shaped
• CPC Class Codes: A47L 9/1427 Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
• CPC Class Codes: B01D 46/02 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material

Abstract

A vacuum cleaner for picking up asbestos fibers, and the like, embodying a plurality of filters for affording a "fail-safe" type of protection against the discharge of accumulated materials from the cleaner, and in which the primary filter comprises a bag in which the picked-up material may be collected for subsequent safe and efficient disposal.

Claims

1. A vacuum cleaner comprising

a. a casing comprising

(1) a tank having

(a) a closed bottom;

and

(b) an open top, and

(2) a cover member

(a) mounted on said open top, and

(b) movable between open and closed position relative thereto,

b. said tank having inlet means for feeding air thereinto,

c. said cover having outlet means for feeding air outwardly therethrough,

d. a combination motor-blower unit mounted in said cover for drawing air inwardly through said inlet means and discharge air outwardly through said outlet means when said cover is disposed in said closed position on said tank,

e. a filter bag removably mounted in said tank and operatively connected to said inlet means for filtering air passing from said inlet means to said outlet means,

f. a second filter removably mounted on said open top and extending thereacross in position to filter air passing from said filter bag to said outlet means,

g. a third filter releasably secured to and supported by said cover member in downwardly projecting relation thereto in a position to filter air passing from said second filter to said outlet means, and

h. means secured to and projecting downwardly from said cover in position to prevent said second filter from engaging said third filter.

2. A vacuum cleaner as defined in claim 1, and in which

a. said downwardly projecting means comprises an open cage, and

b. said third filter is disposed in said cage.

3. A vacuum cleaner comprising

a. a casing comprising

(1) a tank, and

(2) a cover member removably mounted on said tank in covering relation thereto,

b. said tank comprising

4. a bottom wall,a substantially cylindrical-shaped side wall projecting upwardly from said bottom wall, andan open top,

c. said cover comprisinga dome, and

a base plate disposed below said dome in position to support the latter on said open top in upwardly projecting relation thereto,

d. said side wall having an inlet connector extending therethrough,

e. said cover havingan air inlet passage extending through said base plate, and

an air outlet,

f. a combination motor-blower unit mounted in said cover between said dome and said base plate and resting on said base plate in position to draw air from the surrounding atmosphere into said tank through said inlet connector and then from said tank into said cover and then outwardly through said air outlet out into the surrounding atmosphere,

g. a disposable filter bag mounted in said tank and releasably connected to said inlet connector for filtering air passing from said inlet connector into said tank,

h. a second filter bag having an open top,

i. said second filter bag

(1) having a flange

(a) around the upper periphery thereof, and

(b) resting on said top of said tank, and

(2) projecting downwardly into said tank in position to filter air passing from said first mentioned filter bag to said air outlet, and

j. a third filter removably mounted on said base plate in position to filter air passing from said second filter bag to said inlet passage through said base plate,

k. said third filter

(1) projecting downwardly from said base plate and

(2) being supported from said base plate by a supporting member which is releasably secured to said base plate,

5. said third filter comprising a cartridge filter including

(1) a closed bottom,

(2) a perforate side wall, and

(3) an open top,

m. air passing through said third filter entering through said perforate side wall and exiting through said last mentioned open top,

n. said supporting member for said third filter comprising spaced elongated members having

(1) lower portions underlying said closed bottom of said third filter, and

(2) upper portions releasably secured to said base plate, and

o. said third filter being supported by said supporting member in position wherein said open top of said third filter is disposed in abutting engagement with the bottom face of said base plate in axial alignment with said inlet opening through the latter.

6. A vacuum cleaner comprising

a. a casing comprising

(1) a tank, and

(2) a cover member removably mounted on said tank in covering relation thereto,

b. said tank comprising

(1) a bottom wall,

(2) a substantially cylindrical-shaped side wall projecting upwardly from said bottom wall, and

(3) an open top,

c. said cover comprising

(1) a dome, and

(2) a base plate disposed below said dome in position to support the latter on said open top in upwardly projecting relation thereto,

d. said side wall having an inlet connector extending therethrough,

e. said cover having

(1) an air inlet passage extending through said base plate, and

(2) an air outlet,

f. a combination motor-blower unit mounted in said cover between said dome and said base plate and resting on said base plate in position to draw air from the surrounding atmosphere into said tank through said inlet connector and then from said tank into said cover and then outwardly through said air outlet out into the surrounding atmosphere,

g. a disposable filter bag mounted in said tank and releasably connected to said inlet connector for filtering air passing from said inlet connector into said tank,

h. a second filter bag having an open top,

i. said second filter bag

(1) having a flange

(a) around the upper periphery thereof, and

(b) resting on said top of said tank, and

(2) projecting downwardly into said tank in position to filter air passing from said first mentioned filter bag to said air outlet, and

j. a third filter removably mounted on said base plate in position to filter air passing from said second filter to said inlet passage through said base plate,

k. said third filter

(1) projecting downwardly from said base plate and

(2) being supported from said base plate by a supporting member which is releasably secured to said base plate,

l. said third filter comprising a cartridge filter including

(1) a closed bottom,

(2) a perforate side wall, and

(3) an open top,

m. air passing through said third filter entering through said perforate side wall and exiting through said last mentioned open top,

n. said supporting member for said third filter comprising spaced elongated members having

(1) lower portions underlying said closed bottom of said third filter, and

(2) upper portions releasably secured to said base plate,

o. said third filter being supported by said supporting member in position wherein said open top of said third filter is disposed in abutting engagement with the bottom face of said base plate in axial alignment with said inlet opening through the latter, and

p. an open cage

(1) mounted on said base plate,

(2) disposed around said third filter in outwardly spaced relation thereto, and

(3) projecting downwardly from said base plate in position to

(a) prevent said second filter bag from moving into engagement with said third filter when said cover is mounted on said tank in operative relation thereto, and

(b) afford a support for supporting said cover member on a supporting surface, with said third filter, base plate and dome disposed in upwardly spaced relation to such a supporting surface, when said cover is removed from said tank.