IT1244139B - Ventilation opening for a gear box - Google Patents

Ventilation opening for a gear box

Info

Publication number
IT1244139B
IT1244139B IT02164490A IT2164490A IT1244139B IT 1244139 B IT1244139 B IT 1244139B IT 02164490 A IT02164490 A IT 02164490A IT 2164490 A IT2164490 A IT 2164490A IT 1244139 B IT1244139 B IT 1244139B
Authority
IT
Italy
Prior art keywords
gear box
opening
container
ventilation opening
ventilation
Prior art date
Application number
IT02164490A
Other languages
Italian (it)
Other versions
IT9021644A0 (en
IT9021644A1 (en
Inventor
Rudolf Raab
Original Assignee
Zahnradfabrik Friedrichshafen
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 Zahnradfabrik Friedrichshafen filed Critical Zahnradfabrik Friedrichshafen
Publication of IT9021644A0 publication Critical patent/IT9021644A0/en
Publication of IT9021644A1 publication Critical patent/IT9021644A1/en
Application granted granted Critical
Publication of IT1244139B publication Critical patent/IT1244139B/en

Links

Landscapes

  • General Details Of Gearings (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention concerns a ventilation opening 1 for a gear box 2. The volume of air enclosed in a gear box 2 varies as a result of variations in temperature. An increase in temperature causes an increase in pressure, whereas during a reduction of temperature in the gear box 2 a reduction of pressure occurs. When the oil present in gear box 2 is placed in turbulence, an oil foam is formed. The ventilation of opening 1 permits compensation of the pressure and prevents escape of oil as well as entry of dirt, etc. The ventilation opening 1 has an expansion chamber 9, which according to the invention is designed as a flexible container 10. The external dimensions of container 10 are greater than opening 3 of the gear box 2, in which opening the ventilation opening 1 is screwed. Since the container 10 must be flexible, on the one hand, but must also be sufficiently rigid, on the other, it is advantageous to design the container 10 from an elastomer. <IMAGE>
IT02164490A 1989-10-11 1990-10-05 Ventilation opening for a gear box IT1244139B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3933895 1989-10-11

Publications (3)

Publication Number Publication Date
IT9021644A0 IT9021644A0 (en) 1990-10-05
IT9021644A1 IT9021644A1 (en) 1992-04-05
IT1244139B true IT1244139B (en) 1994-07-08

Family

ID=6391240

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02164490A IT1244139B (en) 1989-10-11 1990-10-05 Ventilation opening for a gear box

Country Status (1)

Country Link
IT (1) IT1244139B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466179A (en) * 2008-12-05 2010-06-16 Gm Global Tech Operations Inc Casing having a breather duct with a tank for balancing pressure changes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466179A (en) * 2008-12-05 2010-06-16 Gm Global Tech Operations Inc Casing having a breather duct with a tank for balancing pressure changes

Also Published As

Publication number Publication date
IT9021644A0 (en) 1990-10-05
IT9021644A1 (en) 1992-04-05

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19941030