US 4,204,846 A · Self-cleaning air filter · patentgrep

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Abstract

An apparatus for filtering particulate material from air and for removing the particulate material collected upon a filter is disclosed. The apparatus includes a housing having an air inlet and an air outlet. A hollow longitudinally extending filter is secured within the housing. The filter has an outer surface, an open interior, opposite ends, and a longitudinal axis extending between the ends. The filter is formed of a porous media. One end of the filter is removably secured relative to the housing so that the longitudinal axis of the filter extends generally vertically. The other end of the filter is closed. A first chamber is defined around the outer surface of the filter. The chamber is in communication with the air inlet whereby air moving from the inlet to the outlet passes through the filter into the interior thereof and deposits particulate material on the outer surface of the filter. A mechanism is provided for removing the particulate material collected on the outer surface of the filter. The mechanism for removing the particulate material includes a device connected to the closed end for rotating the closed end and the end of the filter attached thereto to twist the filter.

Claims29

Dependent claims

Self-cleaning apparatus for removing particulate material from air comprising:

(a) a housing having an air inlet and an air outlet;
(b) filtering means comprising a hollow frusto-conical shaped filter;
(c) said filter having an outer surface, an open interior, opposite open ends with one of said ends having a larger diameter than the other end, and a longitudinal axis extending between the ends;
(d) said filter being formed of a pleated pourous media;
(e) means for removably securing the end with the larger diameter within said housing;
(f) a closure plate secured to and sealing the other end;
(g) means defining a first chamber around the outer surface of said filter, said first chamber being in communication with said air inlet whereby air moving from said inlet to said outlet passes through said filter into the interior thereof and deposits particulate material on said outer surface of the filter;
(h) means for removing particulate material collected on the outer surface of said filter by twisting said filter;
(i) means for biasing said filter to a neutral position wherein said filter is in an untwisted condition;
and
(j) said removing means including a rotatable rod having a longitudinally extending axis, said rod extending from said plate in a direction generally transverse to a major face of said plate, means for drivingly coupling said rod to said plate, camming means engaging said rod for rotating said rod from said neutral position of said rod in a first rotative direction through an angular displacement less than 90.degree. and for rotating said rod from said neutral position in an opposite rotative direction through an angular displacement less than 90.degree., said coupling means transferring the rotary motion of said rod to said plate while permitting said rod to move transversely of said major face of the plate, and a drive motor for driving said camming means.

8 more elements

Self-cleaning apparatus for removing particulate material from air comprising:

(a) a housing having an air inlet and an air outlet;
(b) filtering means comprising a hollow generally tubular filter;
(c) said filter having an outer surface, an open interior, opposite first and second ends and a longitudinal axis extending between the ends;
(d) said filter being formed of a porous media;
(e) means for securing said first end of said filter relative to said housing so that the longitudinal axis extends generaly vertically;
(f) a closure plate connected to said second end of said filter for closing said second end of said filter, said first end being open and in communication with said air outlet;
(g) means defining a filtering chamber around the outer surface of said filter, said filtering chamber being in communication with said air inlet whereby air moving from said inlet to said outlet passes through said filter into the interior thereof and deposits particulate material on said outer surface of said filter;
(h) means connected to said closure plate for twisting said filter about said axis to remove particulate material collected on the outer surface of said filter;
(i) said twisting means including a rod having a longitudinal axis, said rod being rotatable about its axis, said rod extending from said closure plate in a direction generally transverse to a major face of said closure plate, means for intermittently rotating said rod, means coupling said rod to said plate, said coupling means transferring the rotary motion of said rod to said plate while allowing one of said rod and said plate to move relative to the other of said rod and said plate in a direction transverse of the major face of said plate;
(j) means for biasing said filter and said rod to a neutral position wherein said filter is not twisted;
and
(k) said intermittent rod rotating means including a drive motor, a drive shaft rotated by said drive motor about its longitudinal axis, and camming means driven by said drive shaft for rotating said rod from said neutral position of said rod in a first rotative direction through an angular displacement less than 90 degrees.

9 more elements

Self-cleaning apparatus for removing particulate material from air comprising:

(a) a housing having an air inlet and an air outlet;
(b) filtering means comprising a hollow generally tubular filter;
(c) said filter having an outer surface, an open interior, opposite first and second ends and a longitudinal axis extending between the ends;
(d) said filter being formed of a porous media;
(e) means for securing said first end of said filter relative to said housing so that the longitudinal axis extends generally vertically;
(f) a closure plate connected to said second end of said filter for closing said second end of said filter, said first end being open and in communiction with said air outlet;
(g) means defining a filtering chamber around the outer surface of said filter, said filtering chamber being in communication with said air inlet whereby air moving from said inlet to said outlet passes through said filter into the interior thereof and deposits particulate material on said outer surface of said filter;
(h) means connected to said closure plate for twisting said filter about said axis to remove particulate material collected on the outer surface of said filter;
(i) said twisting means including a rod having a longitudinal axis, said rod being rotatable about its axis, said rod extending from said closure plate in a direction generally transverse to a major face of said closure plate, means for intermittently rotating said rod, means coupling said rod to said plate, said coupling means transferring the rotary motion of said rod to said plate while allowing one of said rod and said plate to move relative to the other of said rod and said plate in a direction transverse of the major face of said plate;
(j) means for biasing said filter and said rod to a neutral position wherein said filter is not twisted;
(k) said intermittent rod rotating means including a drive motor, a draft shaft rotated by said drive motor about its longitudinal axis, and means driven by said drive shaft for turning said rod through an angular displacement less than 180 degrees;
and
(l) control means connected to said drive motor for controlling the number of rotations of said drive shaft in a selected time, said control means including a timing gear supported for rotation adjacent said drive shaft, a drive gear fixedly secured to the drive shaft of said drive motor for rotation therewith, said drive gear drivingly engaging said timing gear to rotate said timing gear when the drive shaft of said drive motor rotates, said timing gear and said drive gear being in a gear ratio such that for one rotation of said timing gear the drive shaft of said drive motor rotates a number of times, and circuit means coupled to said timing gear for starting and stopping the rotation of the drive shaft of said drive motor.

10 more elements

Self-cleaning apparatus for removing particulate material from air comprising:

(a) a housing having an air inlet and an air outlet;
(b) filtering means comprising a hollow generally tubular filter;
(c) said filter having an outer surface, an open interior, opposite first and second ends and a longitudinal axis extending between the ends;
(d) said filter being formed of a porous media;
(e) means for secruing said first end of said filter relative to said housing so that the longitudinal axis extends generally vertically;
(f) a closure plate connected to said second end of said filter, for closing said second end of said filter, said first end being open and in communication with said air outlet;
(g) means defining a filtering chamber around the outer surface of said filter, said filtering chamber being in communication with said air inlet whereby air moving from said inlet to said outlet passes through said filter into the interior thereof and deposits particulate material on said outer surface of said filter;
(h) means connected to said closure plate for twisting said filter about said axis to remove particulate material collected on the outer surface of said filter;
and
(i) said twisting means including a rod having a longitudinal axis, said rod being rotatable about its axis, said rod extending from said plate in a direction generally transverse to a major face of said plate, a motor having an outer casing, connecting means connecting said rod to said outer casing, means for mounting said motor and motor casing to said housing for relative rotation with respect to one another, said mounting means allowing said motor casing to rotate relative to said housing when said motor is started, and said connecting means transferring the rotary motion of said casing to said rod while permitting said rod and said plate to move in a direction transverse of the major face of said plate.

7 more elements

Self-cleaning apparatus for removing particulate material from air comprising:

(a) a housing having an air inlet and an air outlet;
(b) filtering means comprising a hollow generally tubular filter;
(c) said filter having an outer surface, an open interior, opposite first and second ends and a longitudinal axis extending between the ends;
(d) said filter being formed of a porous media;
(e) means for securing said first end of said filter relative to said housing so that the longitudinal axis extends generally vertically;
(f) a closure plate connected to said second end of said filter for closing said second end of said filter, said first end being open and in communication with said air outlet;
(g) means defining a filtering chamber around the outer surface of said filter, said filtering chamber being in communication with said air inlet whereby air moving from said inlet to said outlet passes through said filter into the interior thereof and deposits particulate material on said outer surface of said filter;
(h) means connected to said closure plate for twisting said filter about said axis to remove particulate material collected on the outer surface of said filter;
(i) said twisting means including a rod having a longitudinal axis, said rod being rotatable about its axis, said rod extending from said plate in a direction generally transverse to a major face of said plate and into the hollow interior of said filter;
and
(j) a fan disposed within said housing downstream of said filtering chamber and above said plate, a motor being secured within said housing for driving said fan to draw air through said inlet, to said filtering chamber, through said filter and out of said outlet, a first drive shaft driven by said motor and connected to the fan for driving said fan, a second drive shaft driven by said motor, and means for intermittently connecting said second drive shaft to said rod for intermittently rotating said rod.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/909,840Filed 26 May 1978
Granted: 27 May 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B01D 46/521
Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material: using folded, pleated material
B01D 46/0005
Casings; Housings; Frame constructions: mounting of filtering elements within casings, housings or frames
B01D 46/74
Regeneration of the filtering material or filter elements inside the filter: by forces created by movement of the filter element
B01D 2265/024
Non-permanent measures for connecting different parts of the filter: mounting aids

Family

No related US applications are recorded in the indexed filing history.

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Citations

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