Machine element or mechanism – Elements – Gear casings
Patent
1989-11-03
1991-01-29
Bonck, Rodney H.
Machine element or mechanism
Elements
Gear casings
464170, 55409, F16H 5702
Patent
active
049877950
ABSTRACT:
The difficulty of venting oil from a transmission with the venting of gas therefrom is avoided in a vented transmission construction including a housing (10), a rotary input (12) to the housing (10), a rotary output (46) from the housing (10), and a transmission (24, 26, 28, 30, 32, 44, 48) interconnecting the input (12) and the output (46) and including a hollow rotary shaft (34) journaled within the housing (10). A vent tube (64) has one end (66) extending into one end (54) of the hollow shaft (34) and another end (68) in fluid communication with the exterior of the housing (10). A shoulder (56) within the hollow shaft defines a relatively small diameter section (58) and a relatively large diameter section (60) and at least one aperture (62) extends through the hollow shaft (34) from the larger diameter section (60) immediately adjacent the shoulder (56). A labyrinth seal (72) is located at the interface of the vent tube (64) and the larger diameter section (60) at a location between the aperture (62) and the end (68) of the vent tube (64). The construction provides for centrifugal separation of gas to be vented and lubricant within the housing (10).
REFERENCES:
patent: 1144331 (1915-06-01), Lower
patent: 1529936 (1925-03-01), Tinniswood
patent: 2818047 (1957-12-01), Powell
patent: 3378104 (1968-04-01), Venalde
patent: 4409401 (1977-09-01), Smith
patent: 4446755 (1984-05-01), Takahashi
patent: 4554844 (1985-11-01), Hamano
patent: 4595118 (1986-06-01), Azuma et al.
patent: 4911035 (1990-03-01), Taguchi
Bonck Rodney H.
Sundstrand Corporation
Ta Khoi Q.
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