GB2260503A - A breather - Google Patents

A breather Download PDF

Info

Publication number
GB2260503A
GB2260503A GB9121330A GB9121330A GB2260503A GB 2260503 A GB2260503 A GB 2260503A GB 9121330 A GB9121330 A GB 9121330A GB 9121330 A GB9121330 A GB 9121330A GB 2260503 A GB2260503 A GB 2260503A
Authority
GB
United Kingdom
Prior art keywords
baffle
breather
passage
body member
cap
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.)
Withdrawn
Application number
GB9121330A
Other versions
GB9121330D0 (en
Inventor
Arthur H Barrington
Charles Neville Bernstein
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.)
MG Rover Group Ltd
Original Assignee
MG Rover Group 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 MG Rover Group Ltd filed Critical MG Rover Group Ltd
Priority to GB9121330A priority Critical patent/GB2260503A/en
Publication of GB9121330D0 publication Critical patent/GB9121330D0/en
Publication of GB2260503A publication Critical patent/GB2260503A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators

Abstract

A breather for a gear box or engine comprises a generally tubular body 12 which fits in a gearbox or other casing 24, a cap 14 over one end of the body 12 and a baffle 16 in the form of a helical spring 51 tapered at each end and being held in position in the passage through body 12 by friction. Air flows between the cap 14 and body 12 via gaps 37 in ridge 36. <IMAGE>

Description

A BREATHER The present invention concerns a breather and, in particular, a breather suitable for use in â vehicle gearbox or engine.
Breathers are known which comprise a breather body member defining a passage and a baffle in the passage for trapping particles passing therethrough, the baffle comprising a slug of wire wool. Such breathers are used in vehicle gearboxes to allow air to escape from the gearbox whilst particles of oil carried in the air are trapped on the baffle and all back into the gearbox.
In sone cases, particularly in small breathers, the slug of wire wooi tends to clog easily, can be difficult to manufacture ana, because of its flexible nature, difficult to locate in the breather body.
The present invention provides breather comprising a bodv retnoer defining a passage and a baffle located tn the passage for trapping particles passing therethrough, the baffle comprising coiled elongate member.
Preferably the baffle is tapered, desirably towards both ends. This enables an effective baffle to be made very simply.
Preferably the elongate member is of a resilient material. This increases the tolerance on the dimensions of the baffle and of the body member.
The baffle may be held in the body member by friction.
This allows for simple fitting and removal of the baffle.
A preferred embodiment of the invention will now be described by way of example only with reference to the accompanying drawing in which: Figure 1 is a section through a breather according to the invention.
A breather 10 comprises a body member 12, a breather cap 14 and a baffle o. The body member 12 is senerall tubular, defining a passage 18 therethrough, and has a mounting portIon 20 part way along it. The mounting portion 20 comprIses a thickened tubular part 21 which fits into a hole 22 defined in a gearbox casing 24, and a flange 26 for locating the body member 12 axially relative to the gearbox casing 24. At one end 28 the body member 12 has an end wall 30 and an opening 32 in its side.
Towards the other end 34 of the body member 12 is a radially outwardly projecting ridge 36. The ridge 36 is non-continuous having gaps 37.
The cap 14 comprises concentric inner and outer tubular portions 38 and 40 extending from a circular end wall 42.
The outer tubular portion 40 is longer than the Inner tubular portion 38 and has a radially ir wardly projecting ridge 44 near its free end 46. When the cap 14 is fitted onto the body member 12 the body member extends between the two tubular portions 38, 40 of the cap 14 and the two ridges 36, 44 co-operate to retain the cap 14 in position.
The baffle 16 comprises an elongate member 50 of stainless spring steel which is coiled into a helical spring 51 of the required shape.
The spring 51 is singly wound with a gap 52 between its turns 4 to allow air to pass therethrough, and is tapered towards each ena. At its widest point the spring 51 has diameter which, when the spring is relaxed, is slightly greater than the diameter of the passage 18 such that it is held in position in the body member 12 by friction.
One end 56 of the baffle 16 extends slightly inside the Inner tubular portion 38 of the cap 14.
In use when air passes out of the gearbox through the breather 10 it enters through the opening 32 and passes along the passage 18 through the baffle 16 between the inner and outer tubular portions 38, 40 of the cap 14 and out through the gaps 37 in the ridge 36. Oil particles entrained in the air impinge upon the baffle 16 and fall back down onto the end wall 30 and then drain back into the gearbox.
The relatively open structure of the baffle 16 tends to prevent it from becoming clogged.

Claims (1)

  1. A A breather comprising a body member defining a passage and a baffle located in the passage for trapping particles passing therethrough, the baffle comprising a coiled elongate member.
    2. A breather according to claim 4 wherein the elongate member is helically coiled.
    2.. A breather according to claim 1 or claim 2 wherein the baffle is tapered.
    4. A breather according to claim 2 wherein the baffle apered towards two opposite ends thereof.
    A A breather according to any foregoing claim wherein the coiled elongate member is formed frm a resilient material.
    6. A breather according to claim 5 wherein the baffle Is held in the body member by friction.
    7. A breather substantially as hereinbefore described with reference to the accompanying drawing.
GB9121330A 1991-10-09 1991-10-09 A breather Withdrawn GB2260503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9121330A GB2260503A (en) 1991-10-09 1991-10-09 A breather

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9121330A GB2260503A (en) 1991-10-09 1991-10-09 A breather

Publications (2)

Publication Number Publication Date
GB9121330D0 GB9121330D0 (en) 1991-11-20
GB2260503A true GB2260503A (en) 1993-04-21

Family

ID=10702587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9121330A Withdrawn GB2260503A (en) 1991-10-09 1991-10-09 A breather

Country Status (1)

Country Link
GB (1) GB2260503A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917903A1 (en) * 1997-11-19 1999-05-26 DaimlerChrysler AG Filler tube for liquid containers
CN101984274A (en) * 2010-09-29 2011-03-09 中国铝业股份有限公司 Labyrinth-type breather hole cover
WO2011060806A1 (en) * 2009-11-23 2011-05-26 Gkn Driveline International Gmbh Ventilation system and gear system comprising such a ventilation system
JP2011179540A (en) * 2010-02-26 2011-09-15 Tsubaki Emerson Co Air breather of reduction gear
CN106763673A (en) * 2016-11-23 2017-05-31 北京新能源汽车股份有限公司 Breather plug and the vehicle with it

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363228A (en) * 1931-02-21 1931-12-17 Platen Munters Refrig Syst Ab Improvements in liquid filters
GB458913A (en) * 1935-11-05 1936-12-29 Separator Ab Improved means for removing oil from air or other gaseous fluids
GB921906A (en) * 1958-05-29 1963-03-27 Scient Design Co Improvements in or relating to means for retaining solids in tubes
GB1179883A (en) * 1967-05-02 1970-02-04 British Aircraft Corp Ltd Form Improvements relating to apparatus for Removing Liquid Particles from a Gas Stream
GB2139518A (en) * 1983-05-14 1984-11-14 Pektron Ltd Flow-line filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363228A (en) * 1931-02-21 1931-12-17 Platen Munters Refrig Syst Ab Improvements in liquid filters
GB458913A (en) * 1935-11-05 1936-12-29 Separator Ab Improved means for removing oil from air or other gaseous fluids
GB921906A (en) * 1958-05-29 1963-03-27 Scient Design Co Improvements in or relating to means for retaining solids in tubes
GB1179883A (en) * 1967-05-02 1970-02-04 British Aircraft Corp Ltd Form Improvements relating to apparatus for Removing Liquid Particles from a Gas Stream
GB2139518A (en) * 1983-05-14 1984-11-14 Pektron Ltd Flow-line filter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917903A1 (en) * 1997-11-19 1999-05-26 DaimlerChrysler AG Filler tube for liquid containers
WO2011060806A1 (en) * 2009-11-23 2011-05-26 Gkn Driveline International Gmbh Ventilation system and gear system comprising such a ventilation system
CN102859236A (en) * 2009-11-23 2013-01-02 Gkn动力传动系统国际有限责任公司 Ventilation system and gear system comprising such a ventilation system
CN102859236B (en) * 2009-11-23 2016-08-17 Gkn动力传动系统国际有限责任公司 Exhaust apparatus and the actuating device with this exhaust apparatus
JP2011179540A (en) * 2010-02-26 2011-09-15 Tsubaki Emerson Co Air breather of reduction gear
CN101984274A (en) * 2010-09-29 2011-03-09 中国铝业股份有限公司 Labyrinth-type breather hole cover
CN101984274B (en) * 2010-09-29 2012-10-10 中国铝业股份有限公司 Labyrinth-type breather hole cover
CN106763673A (en) * 2016-11-23 2017-05-31 北京新能源汽车股份有限公司 Breather plug and the vehicle with it
CN106763673B (en) * 2016-11-23 2019-01-29 北京新能源汽车股份有限公司 Breather plug and vehicle with it

Also Published As

Publication number Publication date
GB9121330D0 (en) 1991-11-20

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)