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Screw cap with centring means for a filter insert
Abstracts of Recent Patents
Oil filter integral
cartridge with an anti-drain back, bypass valve
In GB2307189 Dana Corporation describes a lubricating oil filter cartridge. It is of the type where a pressure relief anti-drain back valve opens to allow flow through the filter and a bypass valve opens if the filter becomes clogged. A single flexible valve member conducts both valve functions A valve support with an inner sleeve portion and an outer sleeve portion supports the valve. The valve includes a skirt which acts as the anti-drain back valve, and an expandable collar portion normally covering holes in the outer sleeve portion. The pressure exerted on the collar portion, when the filter becomes clogged, expands the collar portion, uncovering the holes and allows the flow to bypass the filter and pass on through to the outlet. The valve member may be made of a resilient resinous material, or preferably a low swell, high modulus silicone which requires a greater pressure to expand at low start-up temperatures than at operating temperatures. Other valve support members are also described. Inventor: E.A. Covington. Date of publication: 21 May 1997. Screw means
cap for
with centring a filter insert
In GB2307422 Knecht Filterwerke GmbH describes a screw cap for a filter housing. It includes a centring means and a snap connection for rotatably and radially non-elastically mounting an annular filter insert contained in the housing. The centring means is preferably a round bolt moulded in the cap interior and it is received
in a recess in a holding closure member which slide fits in the filter insert. The outer periphery of the closure member snaps into holding clips of deformable material, which are carried by the screw cap. The cap may include a pipe socket with a hexagonal profile for receipt of a tool, a stopper being inserted in the socket so as to reinforce the socket. Inventors: T. Brieden, H. Jensen and D. Sonntag. Date of publication: 28 May 1997. Apparatus
for separating media
In GB2307423 Trinova GmbH describes an apparatus for separating media of different densities, either two liquids or a gas and a liquid. It comprises a movable separating element that in one position allows the accumulation of one medium. It is moved to another position to separate the accumulated medium from the other medium. The element may be spherical or cylindrical, and may be rotatably mounted about an axis or it may be mounted for translational movement. The element encloses at least one collecting chamber in which the medium accumulates. The element is then moved to a second position, transferring the accumulated medium to a separate receiving space from which it may subsequently be removed through an outlet. The element may be caused to move either manually, or automatically due to pressure variations in the media. When mounted for translational movement, the element includes two valve arrangements to seal receiving space from the mixed media. The apparatus may be mounted above the media supply pipe to separate off a light medium, or below the pipe to separate off a heavier medium. Inventor: H.P. Kettl. Date of publication: 28 May 1997. Filter
assembly
with
biocide
In GB2307425 Nationwide Filter Co Ltd describes filter assembly. It comprises primary and secondary
a fil-
ters, the secondary filter being treated with a biocide and a lower filtering efficiency than the primary. The primary filter is preferably glass fibre paper or matt, while the secondary is preferably non-woven polyester impregnated with the biocide. The filtering materials may be bonded together, and then copleated. A carbon-containing substrate may be incorporated on the side of the primary filter remote from the secondary filter. Inventor: F.I. Wood. Date of publication: 28 May 1997. Filter
sleeve
In GB2307426 Scapa Group Plc describes a filter sleeve for use in a filtering apparatus. It has a filter plate with one or more openings from. which one or more such filter sleeves may extend. The filter sleeve comprises an open-ended sleeve member to which a base member is secured by ultrasonic welding. Inventor: S. Kumaran. Date of publication: 28 May 1997. Cooking
oil/fat apparatus
filtering
In GB2307650 Pro-Stat (UK) Ltd describe a cooking oil/ fat filtering apparatus. It comprises two filters in series with a pump. The hot oil is pumped at pressure from the fryer to the first filter where large particles are removed, to the second filter where smaller contaminants are removed, and then either returned to the fryer, or to a separate holding tank. Preferably, the first filter comprises a removable stainless steel gauze filter cartridge within a housing while the second filter comprises a removable filter cartridge made from closely wound wood pulp fibre, e.g. a roll of paper, within a housing. A heating unit may be included to melt any coagulated fat present in the system before start-up. The apparatus may be integral with the fryer or may be separate, utilising a wand or lance to draw contami-
nated oil from Inventors: J.C. B.D. Goodhew. lication: 4 June Ventilation filtering suitable
the fryer. Sayers and Date of pub1997.
device with arrangement for vehicles
In GE?2307652 MercedesBenz AG describes a ventilation device suitable for a vehicle. It has a housing, a housing inlet which can be connected to a blower and a housing outlet which can be connected to an air guide duct, two air filters acting in parallel. A bypass flap is operable to allow the air flow from the housing inlet to the housing outlet to either pass through the filter arrangement, or, at least substantially bypass the air filter arrangement in an approximately rectilinear manner between the upper filter edges and the housing wall. Preferably the bypass flap in the bypass position extends over and beyond the upper filter edge of the upstream filter as far as the housing wall and the upper filter edge of the upstream filter. The filters are offset relative to one another in the air flow direction and are separated by a partition extending from the upper edge of the upstream filter to the lower edge of the downstream filter. A second bypass path is situated below the downstream filter. Due to the low degree of air flow deflection within the housing when the bypass flap is in the bypass mode, air flow resistance and undesirable air flow noises may be reduced. The bypass flap may be arranged with a pivot axle situated on the upper edge of the downstream filter which may be at or near its front edge facing the upstream filter. The cross-section of the housing wall upstream of the upstream filter may be tapered from the upper filter edge to the lower filter edge to present a more uniformly distributed air flow over the area of the upstream filter. Preferably the downstream filter is of a lesser height than the upstream filter. Inventor: K. Arold. Date of publication: 4 June 1997.
Oil filter integral
cartridge with an anti-drain back, bypass valve
In GB2307189 Dana Corporation describes a lubricating oil filter cartridge. It is of the type where a pressure relief anti-drain back valve opens to allow flow through the filter and a bypass valve opens if the filter becomes clogged. A single flexible valve member conducts both valve functions A valve support with an inner sleeve portion and an outer sleeve portion supports the valve. The valve includes a skirt which acts as the anti-drain back valve, and an expandable collar portion normally covering holes in the outer sleeve portion. The pressure exerted on the collar portion, when the filter becomes clogged, expands the collar portion, uncovering the holes and allows the flow to bypass the filter and pass on through to the outlet. The valve member may be made of a resilient resinous material, or preferably a low swell, high modulus silicone which requires a greater pressure to expand at low start-up temperatures than at operating temperatures. Other valve support members are also described. Inventor: E.A. Covington. Date of publication: 21 May 1997. Screw means
cap for
with centring a filter insert
In GB2307422 Knecht Filterwerke GmbH describes a screw cap for a filter housing. It includes a centring means and a snap connection for rotatably and radially non-elastically mounting an annular filter insert contained in the housing. The centring means is preferably a round bolt moulded in the cap interior and it is received
in a recess in a holding closure member which slide fits in the filter insert. The outer periphery of the closure member snaps into holding clips of deformable material, which are carried by the screw cap. The cap may include a pipe socket with a hexagonal profile for receipt of a tool, a stopper being inserted in the socket so as to reinforce the socket. Inventors: T. Brieden, H. Jensen and D. Sonntag. Date of publication: 28 May 1997. Apparatus
for separating media
In GB2307423 Trinova GmbH describes an apparatus for separating media of different densities, either two liquids or a gas and a liquid. It comprises a movable separating element that in one position allows the accumulation of one medium. It is moved to another position to separate the accumulated medium from the other medium. The element may be spherical or cylindrical, and may be rotatably mounted about an axis or it may be mounted for translational movement. The element encloses at least one collecting chamber in which the medium accumulates. The element is then moved to a second position, transferring the accumulated medium to a separate receiving space from which it may subsequently be removed through an outlet. The element may be caused to move either manually, or automatically due to pressure variations in the media. When mounted for translational movement, the element includes two valve arrangements to seal receiving space from the mixed media. The apparatus may be mounted above the media supply pipe to separate off a light medium, or below the pipe to separate off a heavier medium. Inventor: H.P. Kettl. Date of publication: 28 May 1997. Filter
assembly
with
biocide
In GB2307425 Nationwide Filter Co Ltd describes filter assembly. It comprises primary and secondary
a fil-
ters, the secondary filter being treated with a biocide and a lower filtering efficiency than the primary. The primary filter is preferably glass fibre paper or matt, while the secondary is preferably non-woven polyester impregnated with the biocide. The filtering materials may be bonded together, and then copleated. A carbon-containing substrate may be incorporated on the side of the primary filter remote from the secondary filter. Inventor: F.I. Wood. Date of publication: 28 May 1997. Filter
sleeve
In GB2307426 Scapa Group Plc describes a filter sleeve for use in a filtering apparatus. It has a filter plate with one or more openings from. which one or more such filter sleeves may extend. The filter sleeve comprises an open-ended sleeve member to which a base member is secured by ultrasonic welding. Inventor: S. Kumaran. Date of publication: 28 May 1997. Cooking
oil/fat apparatus
filtering
In GB2307650 Pro-Stat (UK) Ltd describe a cooking oil/ fat filtering apparatus. It comprises two filters in series with a pump. The hot oil is pumped at pressure from the fryer to the first filter where large particles are removed, to the second filter where smaller contaminants are removed, and then either returned to the fryer, or to a separate holding tank. Preferably, the first filter comprises a removable stainless steel gauze filter cartridge within a housing while the second filter comprises a removable filter cartridge made from closely wound wood pulp fibre, e.g. a roll of paper, within a housing. A heating unit may be included to melt any coagulated fat present in the system before start-up. The apparatus may be integral with the fryer or may be separate, utilising a wand or lance to draw contami-
nated oil from Inventors: J.C. B.D. Goodhew. lication: 4 June Ventilation filtering suitable
the fryer. Sayers and Date of pub1997.
device with arrangement for vehicles
In GE?2307652 MercedesBenz AG describes a ventilation device suitable for a vehicle. It has a housing, a housing inlet which can be connected to a blower and a housing outlet which can be connected to an air guide duct, two air filters acting in parallel. A bypass flap is operable to allow the air flow from the housing inlet to the housing outlet to either pass through the filter arrangement, or, at least substantially bypass the air filter arrangement in an approximately rectilinear manner between the upper filter edges and the housing wall. Preferably the bypass flap in the bypass position extends over and beyond the upper filter edge of the upstream filter as far as the housing wall and the upper filter edge of the upstream filter. The filters are offset relative to one another in the air flow direction and are separated by a partition extending from the upper edge of the upstream filter to the lower edge of the downstream filter. A second bypass path is situated below the downstream filter. Due to the low degree of air flow deflection within the housing when the bypass flap is in the bypass mode, air flow resistance and undesirable air flow noises may be reduced. The bypass flap may be arranged with a pivot axle situated on the upper edge of the downstream filter which may be at or near its front edge facing the upstream filter. The cross-section of the housing wall upstream of the upstream filter may be tapered from the upper filter edge to the lower filter edge to present a more uniformly distributed air flow over the area of the upstream filter. Preferably the downstream filter is of a lesser height than the upstream filter. Inventor: K. Arold. Date of publication: 4 June 1997.