Patent ID: 8702072

Claim:
An overhead wire tension balancer comprising: cylindrical members arranged coaxially, a coil spring applying elastic force against relative extension of the cylindrical members in an axial direction, a lubricating agent coated on the coil spring, and a waterproof cover that covers at least part of a gap between the cylindrical members, wherein the cylindrical members include a first cylindrical member and a second cylindrical member, the first cylindrical member is located the furthest to the outside and is fixed to a supporting pillar or a building, the second cylindrical member is located the furthest to the inside and fixes the overhead wire, the waterproof cover has an open structure at a lower part along a longitudinal length of the waterproof cover thereof, and the waterproof cover is fixed to the second cylindrical member and is slidably contacted with the outer circumference of the first cylindrical member.