US 12,031,630 B2
Ring seal and a robot
Xinguo Fu, Shanghai (CN); Tao Feng, Shanghai (CN); and Gongyao Ma, Shanghai (CN)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on May 12, 2021, as Appl. No. 17/318,445.
Claims priority of application No. 202010408965.X (CN), filed on May 14, 2020.
Prior Publication US 2021/0356042 A1, Nov. 18, 2021
Int. Cl. F16J 15/32 (2016.01)
CPC F16J 15/32 (2013.01) 6 Claims
OG exemplary drawing
 
1. A ring seal, comprising:
an outer circumferential wall extending in an axial direction of the ring seal;
an annular portion extending at a right angle from a side of the outer circumferential wall towards an interior of the ring seal from the outer circumferential wall in a radial direction of the ring seal,
an inner circumferential wall extending in the axial direction at a right angle from an end of the annular portion parallel to and spaced apart by a gap from the outer circumferential wall, wherein the inner circumferential wall, the outer circumferential wall and the annular portion form a U shape when viewed in a cross section taken along the radial direction,
wherein the annular portion and the outer circumferential wall form an L shape when viewed in a cross section taken along the radial direction,
the outer circumferential wall comprises a first portion and a second portion arranged and aligned collinearly in the axial direction,
the first portion is close to the annular portion and has a first thickness in the radial direction,
the second portion has a second thickness in the radial direction, and
the second thickness is greater than the first thickness so that a slope is formed on a radially inner side of the outer circumferential wall.