Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
215 words
An air breather structure for oil seals in an automatic transmission wherein each oil seal (31, 33) comprises a pair of sealing members (34, 35) with a space (36) therebetween, and the automatic transmission has a final reduction device (12, 13) provided in a differential case (26) and an automatic transmission device (A) provided in an automatic transmission case (28), the cases being coupled together end-to-end with the interposition of a gasket (27), at least two rotating shafts (11, 16) extending across the gasket for transmitting the output of the automatic transmission to the wheels of a four-wheel drive, with the oil seals provided around the respective rotating shafts respectively; characterised in that the space (36) of a first (31) of the oil seals is vented to atmosphere through a first passage (37) provided in a holding member (30), an opening (39) formed in the coupling end of one of the cases (26, 28) and venting means (40) provided in an upper portion of one of the cases (26, 28) communicating the opening (39) with the atmosphere; and the space (36) of the second oil seal (33) is vented to atmosphere through a second passage (43) provided in the other case; and conduit means for communicating the second passage (43) with the venting means (40).
Claim 2
Dependent Claim
215 words
An air breather structure for oil seals in an automatic transmission wherein each oil seal (31, 33) comprises a pair of sealing members (34, 35) with a space (36) therebetween, and the automatic transmission has a final reduction device (12, 13) provided in a differential case (26) and an automatic transmission device (A) provided in an automatic transmission case (28), the cases being coupled together end-to-end with the interposition of a gasket (27), at least two rotating shafts (11, 16) extending across the gasket for transmitting the output of the automatic transmission to the wheels of a four-wheel drive, with the oil seals provided around the respective rotating shafts respectively; characterised in that the space (36) of a first (31) of the oil seals is vented to atmosphere through a first passage (37) provided in a holding member (30), an opening (39) formed in the coupling end of one of the cases (26, 28) and venting means (40) provided in an upper portion of one of the cases (26, 28) communicating the opening (39) with the atmosphere; and the space (36) of the second oil seal (33) is vented to atmosphere through a second passage (43) provided in the other case; and conduit means for communicating the second passage (43) with the venting means (40).
Claim 3
Dependent Claim
75 words
An air breather structure according to claim 1, wherein the holding member (40) is a holder secured to the differential case (26) for supporting a reduction drive gear (12) of the automatic transmission (A) and the first oil seal is provided in the space between the holding member (40) and a hub (12a) of the reduction drive gear (12), and the opening (39) is formed in the coupling end of the automatic transmission case (28).
Claim 4
Dependent Claim
47 words
An air breather structure according to claim 1 or claim 2, wherein the second oil seal (33) is provided between a shaft (16) of a drive pinion (17) for driving wheels of the vehicle and a cylindrical holding portion (32) formed in the automatic transmission case (28).
Claim 5
Dependent Claim
57 words
An air breather structure according to claim 3, wherein the second passage (43) is provided in the cylindrical holding portion (32), and the venting means comprise an opening (45) formed in the gasket (27), and means incuding a cavity (46) and an annular groove (48) formed in the differential case (26) at a coupling end portion thereof.