Unitary air bleed device

• US 4,506,562 A
• Filed: 03/28/1984
• Issued: 03/26/1985
• Est. Priority Date: 02/28/1980
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Yamaura, Tadao, Nishihata, Susumu
• Primary Examiner(s): Dorner, Kenneth J.
• Application Number:
  US06/594,411
• Time in Patent Office: 363 Days
• Field of Search: 220/373, 220/374, 220/209, 220/DIG. 19, 137/846, 137/854, 138/89.4, 138/89.1, 74/606 R
• US Class Current: 74/606.00R
• CPC Class Codes: F16H 48/08 comprising bevel gears
• CPC Class Codes: F16H 57/027 characterised by means for venting gearboxes, e.g. air breathers
• CPC Class Codes: F16H 57/0483 Axle or inter-axle differentials
• CPC Class Codes: Y10T 137/7882 Having exit lip
• CPC Class Codes: Y10T 74/2186 Gear casings

Abstract

A unitary air bleed device of an elastomeric deformable material and has an integrally formed head portion with a vent hole and a cylindrical portion with a connecting passage formed therethrough. The connecting passage communicates with the vent hole of the head portion. The deformation of the air bleed device permits the air bleed device to be mounted to an enclosed housing by press fitting. When mounted, the cylindrical portion extends into the housing in such a direction to prevent the oil entry into the connecting passage.

Claims

1. An air bleed device for a housing having a mating hole, said housing enclosing an automotive component which is lubricated by oil, said air bleed device comprising:

a head portion having a vent hole formed therein;

a cylindrical portion having a connecting passage therethrough in communication with said vent hole of said head portion, said cylindrical portion having a waist portion adapted to engage said mating hole, said cylindrical portion being operable to be inclined with respect to an axis of said mating hole to thereby extend into said housing in a predetermined direction inclined with respect to a flushing direction of said oil, said waist portion and said mating hole having complimentary cross sections with means for permitting said cylindrical portion to be inserted in said mating hole only in said predetermined direction.

2. The air bleed device of claim 1, wherein said vent hole opens toward an exterior surface of said housing.

3. The air bleed device of claim 1, wherein said head portion and cylindrical portion form an elastomeric body operable to be removably mounted, by press fitting, into said housing by deformation of said elastomeric body.

4. The device of claim 1 wherein said mating hole and waist portion cooperate to prevent rotation of said device from said predetermined direction after insertion into said mating hole.

5. An air bleed device for a housing having a mating hole, said housing enclosing an automotive component which is lubricated by oil, said air bleed device comprising:

a head portion having a vent hole formed therein and a flange portion for engaging an exterior surface of said housing;

a cylindrical portion having a connecting passage therethrough in communication with said vent hole of said head portion, said head portion and cylindrical portion forming an elastomeric body operable to be removably mounted, by press fitting, into said housing by deformation of said elastomeric body whereby said vent hole opens into said housing, said cylindrical portion having a waist portion adapted to engage said mating hole, said cylindrical portion being operable to be inclined with respect to an axis of said mating hole to thereby extend into said housing in a predetermined direction inclined with respect to a flushing direction of said oil, said waist portion and said mating hole having complimentary cross sections operable to firmly orient said cylindrical portion in said predetermined direction; and

a cap engaging said head portion and having a peripheral edge portion contacting said flange portion to define a chamber between said cap, said head portion, and said flange portion, wherein said peripheral edge portion is operable to flex out of contact with said flange portion in response to a predetermined pressure differential between an inside and outside said housing.