Dust collector
AssigneeIndustriell Arbetshygien i Soderhamn AB
InventorAnders Krantz
Life of this patent
Estimating the term…
Abstract
A dust collector including two tubes which communicate through an interconnecting conduit. A first tube operates as a cyclone which separates a great fraction of dust or solid components from the incoming air and collects the same in a bag at the bottom of the tube. The second tube includes a filter unit composed of a coarser filter as well as a surrounding fine filter, the filter unit receiving the pre-purified air from the cyclone tube through the interconnecting conduit and separating the remaining dust particles therefrom.
Claims20
A dust collector for collecting dust-laden air containing coarse components as well as medium and fine sized particles, comprising:
- (a) a first casing having a tubular wall and top and bottom ends;
- (b) an air intake duct communicating with said first casing, located in the vicinity of said top end and extending tangially in relation to said tubular wall, said air intake duct being arranged for sucking dust-laden air located outside said dust collector into said first casing and projecting such air with a circulating movement downwardly towards said bottom end in the manner of a cyclone, at least the coarse components contained in the dust-laden air being deposited at said bottom end to create pre-purified air that is projected upwardly toward said top end;
- (c) a conical funnel located between said air intake duct and said bottom end, said conical funnel having a maximum outer diameter which is smaller than the inner diameter of said tubular wall so as to define a gap between said funnel and said tubular wall through which the dust-laden air is allowed to pass, said funnel converging upwardly towards said top end, said funnel having a neck of minimum diameter and including a narrow tube connected to said neck;
- (d) a second casing having upper and lower ends and provided with an exhaust outlet;
- (e) an interconnecting conduit connecting the top end of said first casing with the upper end of said second casing, the funnel in said first casing being positioned so that the narrow tube communicates with said interconnecting conduit and passing the pre-purified air flowing up from the bottom end of said first casing into said second casing via said interconnecting conduit;
- and
- (f) filter means mountable in said second casing for separating particles remaining in the pre-purified air arriving from said first casing, said filter means including first and second shell-like filter elements disposed concentrically relative to each other, said first filter element being on the interior of said second filter element, arranged for first receiving the pre-purified air from said first casing and comprising a relatively coarse filter structure having pores with a diameter of 0.1 micrometers or more, said second filter element comprising a relatively fine filter structure having pores with a diameter between 0.001 and 0.01 micrometers, said first and second filter elements being mountable and dismountable in said second casing as a single integral unit.
Dependencies are inferred from the claim text.