GB2203667A - Filter for mastitis detection - Google Patents

Filter for mastitis detection Download PDF

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Publication number
GB2203667A
GB2203667A GB08805501A GB8805501A GB2203667A GB 2203667 A GB2203667 A GB 2203667A GB 08805501 A GB08805501 A GB 08805501A GB 8805501 A GB8805501 A GB 8805501A GB 2203667 A GB2203667 A GB 2203667A
Authority
GB
United Kingdom
Prior art keywords
filter assembly
screen
assembly according
inlet
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08805501A
Other versions
GB2203667B (en
GB8805501D0 (en
Inventor
David John Gwilliam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
POLDEN PRODUCTS Ltd
Original Assignee
POLDEN PRODUCTS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by POLDEN PRODUCTS Ltd filed Critical POLDEN PRODUCTS Ltd
Publication of GB8805501D0 publication Critical patent/GB8805501D0/en
Publication of GB2203667A publication Critical patent/GB2203667A/en
Application granted granted Critical
Publication of GB2203667B publication Critical patent/GB2203667B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/157—Flow control valves: Damping or calibrated passages
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/013—On-site detection of mastitis in milk
    • A01J5/0134—On-site detection of mastitis in milk by using filters or decanters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B01D29/031—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting with corrugated, folded filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A filter housing 12 has inlet and outlet chambers separated by a fitter screen 28 which is sinusoidally curved to increase its filtering area and, preferably, to cause the chambers to taper away from the inlet and outlet so that material carried by liquid flowing in tends to become trapped at the narrow end of the inlet chamber (Fig 5). The screen 28 may be mounted on a removable lid 24 and have a by-pass opening 34. The housing may be transparent to allow inspection of the screen. <IMAGE>

Description

FILTER ASSEMBLY, E.G. FOR MASTITIS DETECTION The present invention relates to a filter assembly.
It particularly relates to a filter assembly for use as a mastitis detector. For this purpose, the filter unit is installed in line in a milking system, and the filter is observed for the presence of milk clots indicative of the disease in the animal providing the milk.
Thus the invention provides a filter assembly comprising a chamber having a fluid inlet and a fluid outlet, and a partition dividing it into inlet and outlet chamber portions; the partition comprising a curved filter screen. The curvature of the screen can substantially increase the area available for filtration. Preferably the screen is removable. Preferably the inlet chamber portion tapers away from the inlet. This can encourage solid matter to become trapped at the end of the chamber portion remote from the inlet. The tapering may be achieved at least in part by the curvature of the screen, which may have rotational symmetry such that it can be installed in two orientations without affecting this tapering. The tapering may be unaffected by exchange of inlet and outlet.
The partition may have a bypass opening (preferably not located, in use, in the narrowed end of the inlet chamber, if such is present). This allows suction to be applied in the milk line, through the filter assembly, while still providing sufficient filtering action, at least for use in mastitis detection.
The chamber may have a peripheral wall and a removable lid, to which the partition may be attached. The lid may bear sealing means, e.g. an O-ring. The peripheral wall may have opposed channel formations in which the partition is slidably engageable.
The screen may be of undulating form, the undulations being in a plane parallel to the lid, or at right angles thereto.
An embodiment of the invention will now be described in greater detail with reference to the accompanying drawing in which: Fig. 1 is a plan view of a chamber; Fig. 2 is a side elevation of the chamber; Fig. 3 is an end elevation of the chamber; Fig. 4 is a side elevation of a lid and filter assembly; Fig. 5 is an underneath plan view of the assembly of Fig. 4; and Fig. 6 is a centre elevation of the assembly.
The body 10 shown in Figs. 1 to 3 has an elongate cup portion 10 formed of a peripheral wall 12 and a base 14. A pair of conduits 16,18 communicate with the interior at opposite end regions. In the example shown, the conduits 16,18 are parallel but staggered. They are in the same plane parallel to the base 14. (In other designs, they could be arranged diagonally or at right angles to one another.) Inside the peripheral wall, there is an opposed pair of pairs of ribs 20 defining a pair of channels 22.
(These may start some way beneath the top of the peripheral wall 12 as shown.) The lid 24 has a web portion 26 adapted to close the top of the cup 10. Thus its outline is elongate, with curved ends. An arcuate screen 28 extends beneath the lid 24, curving about the longitudinal axis thereof. The screen may be of any suitable filter medium such as woven wire, expanded metal, or nylon mesh. In the example shown, it has a peripheral carrier 30, which is connected to the web 26. The illustrated screen has rotational symmetry such that Fig. 5 is unchanged by rotation through 1800 about an axis perpendicular to the paper. At either end of the lid assembly, there is a respective end web 32 connected to the lid web 24 and the frame 30 to brace the screen 28. In this example, the screen is sigmoid in shape. It follows an approximately sinusoidal course as seen in plan view.In a central region, there is an elongate aperture 34, bounded by a frame 36. On the top of the lid web 24, there is a handle 38.
The lid/screen assembly can be sealingly coupled with the chamber assembly 10, by engaging the lid so that the screen slides down in the channels 22. Owing to the symmetry, it does not matter in which of the two possible ways the lid is placed. The lid is pushed firmly home, until the frame 30 abuts the interior of the cup member 10.
An O-ring 40 is carried by the lid/screen member, and seals against the mouth of the cup.
By comparing Figs. 1 and 5, it can be seen that each conduit 16,18 opens into a wide portion of a filter chamber, and that each chamber narrows towards its distal end. Thus, whichever conduit serves as the inlet, fluid flowing in tends to throw suspended matter into the narrow region, beyond the aperture 34.
Generally, some or all of the cup member and/or the lid web will be of transparent material, such that the state of the filter screen 28 may be visible without dismantling. However, for a clearer view (or for cleaning or replacement) it is very easy to remove the lid and screen.

Claims (11)

CLAIMS:
1. A filter assembly comprising a chamber having a fluid inlet and a fluid outlet, and a partition which bridges the chamber to divide it into inlet and outlet chamber portions; the partition comprising a curved filter screen.
2. A filter assembly according to claim 1 wherein the curved filter screen comprises a portion of undulating form.
3. A filter assembly according to claim 1 or claim 2 wherein the inlet chamber portion tapers away from the inlet.
4. A filter assembly according to claim 3 wherein the tapering is achieved at least in part by the curvature of the screen, which has rotational symmetry such that it can be installed in two orientations without affecting this tapering.
5. A filter assembly according to claim 4 wherein the outlet chamber portion tapers away from the outlet.
6. A filter assembly according to any preceding claim wherein the screen is removable.
7. A filter assembly according to claim 6 wherein the chamber comprises a peripheral wall and a removable lid, to which the partition is mounted.
8. A filter assembly according to claim 7 wherein the lid bears an O-ring for sealing to the peripheral wall.
9. A filter assembly according to claim 7 or 8 wherein the peripheral wall has opposed channel formations in which the partition is slidably engageable.
10. A filter assembly according to any preceding claim wherein the filter screen has an aperture.
11. A filter assembly substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB8805501A 1987-04-21 1988-03-08 Filter assembly, e.g. for mastitis detection Expired - Fee Related GB2203667B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878709385A GB8709385D0 (en) 1987-04-21 1987-04-21 Filter assembly

Publications (3)

Publication Number Publication Date
GB8805501D0 GB8805501D0 (en) 1988-04-07
GB2203667A true GB2203667A (en) 1988-10-26
GB2203667B GB2203667B (en) 1991-01-09

Family

ID=10616085

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878709385A Pending GB8709385D0 (en) 1987-04-21 1987-04-21 Filter assembly
GB8805501A Expired - Fee Related GB2203667B (en) 1987-04-21 1988-03-08 Filter assembly, e.g. for mastitis detection

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878709385A Pending GB8709385D0 (en) 1987-04-21 1987-04-21 Filter assembly

Country Status (1)

Country Link
GB (2) GB8709385D0 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539425A (en) * 1940-03-05 1941-09-10 India Rubber Gutta Percha Tele Improvements in or relating to liquid filters for pipe lines
GB554198A (en) * 1941-11-19 1943-06-24 Cecil Gordon Vokes Filters insertable in pipe-lines, conduits and the like
GB1438565A (en) * 1972-07-31 1976-06-09 Pall Corp Blood filter
GB1479226A (en) * 1974-04-19 1977-07-06 Johnson & Johnson Purolator Blood filter unit
GB2029255A (en) * 1978-09-09 1980-03-19 Marshall B Demountable filters for liquid flow lines
GB2155355A (en) * 1984-03-09 1985-09-25 Gilardini Spa Air filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539425A (en) * 1940-03-05 1941-09-10 India Rubber Gutta Percha Tele Improvements in or relating to liquid filters for pipe lines
GB554198A (en) * 1941-11-19 1943-06-24 Cecil Gordon Vokes Filters insertable in pipe-lines, conduits and the like
GB1438565A (en) * 1972-07-31 1976-06-09 Pall Corp Blood filter
GB1479226A (en) * 1974-04-19 1977-07-06 Johnson & Johnson Purolator Blood filter unit
GB2029255A (en) * 1978-09-09 1980-03-19 Marshall B Demountable filters for liquid flow lines
GB2155355A (en) * 1984-03-09 1985-09-25 Gilardini Spa Air filter

Also Published As

Publication number Publication date
GB2203667B (en) 1991-01-09
GB8709385D0 (en) 1987-05-28
GB8805501D0 (en) 1988-04-07

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000308