US 12,224,643 B2
Composite oil seal having electric corrosion prevention function
Tae-Hyung Kim, Daegu (KR); Eun-Min Park, Daegu (KR); and Jae-Hyuk Sung, Daegu (KR)
Assigned to PYUNGHWA OIL SEAL INDUSTRY CO., LTD., Daegu (KR)
Filed by PYUNGHWA OIL SEAL INDUSTRY CO., LTD., Daegu (KR)
Filed on May 17, 2023, as Appl. No. 18/198,605.
Claims priority of application No. 10-2023-0008982 (KR), filed on Jan. 20, 2023.
Prior Publication US 2024/0250575 A1, Jul. 25, 2024
Int. Cl. F16J 15/3284 (2016.01); F16J 15/34 (2006.01); H02K 5/124 (2006.01); F16J 15/3208 (2016.01); F16J 15/3232 (2016.01)
CPC H02K 5/124 (2013.01) [F16J 15/3284 (2013.01); F16J 15/348 (2013.01); F16J 15/3208 (2013.01); F16J 15/3232 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A composite oil seal having an electric corrosion prevention function, the composite oil seal being mounted on a shaft in a motor housing to prevent leakage of oil in the motor housing, the composite oil seal comprising:
a seal main body formed of an elastic material, the seal main body having an outer circumferential surface formed to be in tight contact with an inner circumferential surface of the motor housing and at least one lip protruding inwards so as to be in contact with an outer circumferential surface of the shaft; and
an electrical path fabric formed of woven metallic yarns, the electrical path fabric being mounted to the seal main body to electrically connect the shaft to the motor housing so that current induced in the shaft flows to the motor housing,
wherein the electrical path fabric is formed in a circular disc-shape having a central hole through which the shaft passes, an inner rim, an outer rim, a first flat side attached to the seal main body, and a second flat side opposite to the first flat side, and
wherein a diameter of the central hole is smaller than a diameter of the shaft and a diameter of the electrical path fabric is greater than a diameter of the inner circumferential surface of the motor housing such that the inner rim and the outer rim are bent in a direction that the second flat side faces, with the first flat side in direct contact with both the outer circumferential surface of the shaft and the inner circumferential surface of the motor housing.