Filtering device
First Claim
1. A sweeper comprising a body structure, a plurality of wheels supporting said body structure, and a sweeper housing, said body structure including a hopper, a vacuum pump and a dust filter, said hopper serving to store debris picked up by said sweeper, said vacuum pump serving to draw a partial vacuum in said sweeper housing thereby providing a moving airstream, said dust filter being disposed in said airstream to remove dust particles from said airstream, said dust filter comprising a filter housing, a pleated planar filter medium, support means for said filter medium and a striker mechanism for removing accumulated dust from said filter medium, said striker mechanism including at least one strap, said strap having a first end secured with respect to said filter housing, said strap having a second end which is free to move with respect to said filter housing and filter medium, said second end carrying at least one hammer, said strap and hammer overlying the upper edges of the pleated filter medium, and an oscillator supported on said strap intermediate said first and second ends for imparting movement to said strap and hammer to impart shock to said filter medium thereby removing dust accumulation.
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Accused Products
Abstract
A sweeping machine is disclosed including a planar pleated filter and a striking mechanism for removing collected dust from the pleated filter. The striking mechanism includes an elongated strap with resilient pad which overlies the pleated filter. A rotatably driven eccentric weight drives the strap and pad to strike the upper surface of the pleated filter.
An industrial filter device is disclosed including a planar pleated filter and a striking mechanism for removing collected dust from the pleated filter. The striking mechanism includes an elongated strap which overlies the pleated filter. A rotatably driven eccentric weight drives the strap to strike the upper surface of the pleated filter.
59 Citations
11 Claims
- 1. A sweeper comprising a body structure, a plurality of wheels supporting said body structure, and a sweeper housing, said body structure including a hopper, a vacuum pump and a dust filter, said hopper serving to store debris picked up by said sweeper, said vacuum pump serving to draw a partial vacuum in said sweeper housing thereby providing a moving airstream, said dust filter being disposed in said airstream to remove dust particles from said airstream, said dust filter comprising a filter housing, a pleated planar filter medium, support means for said filter medium and a striker mechanism for removing accumulated dust from said filter medium, said striker mechanism including at least one strap, said strap having a first end secured with respect to said filter housing, said strap having a second end which is free to move with respect to said filter housing and filter medium, said second end carrying at least one hammer, said strap and hammer overlying the upper edges of the pleated filter medium, and an oscillator supported on said strap intermediate said first and second ends for imparting movement to said strap and hammer to impart shock to said filter medium thereby removing dust accumulation.
- 6. A filter device comprising a planar porous filter and mechanical means for removing fine particulate material from said pleated planar porous filter, said mechanical means comprising elongated strap means overlying said porous filter to provide a shock to said filter and an oscillator acting on an intermediate portion of said strap means for driving said strap means to repeatedly shock said filter, thereby removing fine particles from said filter.
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11. A sweeper comprising a body structure, a plurality of wheels supporting said body structure, and a sweeper housing, said body structure including a hopper, a vacuum pump and a dust filter, said hopper serving to store debris picked up by said sweeper, said vacuum pump serving to draw a partial vacuum in said sweeper housing thereby providing a moving airstream, said dust filter being disposed in said airstream to remove dust particles from said airstream, said dust filter comprising a filter housing, a pleated planar filter medium, support means for said filter medium and a striker mechanism for removing accumulated dust from said filter medium, said striker mechanism comprising at least two elongated metal straps each carrying a hammer comprising a resilient pad, said straps overlying the upper edges of the pleated filter medium, said elongated metal straps being secured to a cross member intermediate the ends of said straps, and an oscillator supported on said cross member for imparting movement to said straps and resilient pads to impart shock to said filter medium thereby removing dust accumulation.
Specification