Patent ID: 9709172
Date: 2017-07-18
CPC Classifications: F16J

Claim:
1. A shaft seal assembly for sealing along a rotor shaft, the rotor shaft rotatable about an axis of rotation, the assembly comprising: a seal housing having an interior surface, an exterior surface, an outer radial surface, a seal member bore, and a seal housing shaft bore, the seal housing shaft bore is configured to receive the rotor shaft; an annular inner seal member configured to be disposed in the seal member bore; an annular outer seal member configured to be disposed in the seal member bore; an annular middle element disposed between the inner seal member and the outer seal member within the seal member bore; and an end plate having a an end plate shaft bore, wherein the end plate is attached to the seal housing and covers a portion of the seal member bore, the end plate shaft bore configured to receive the rotor shaft; wherein the middle element biases the inner seal member against the seal housing and biases the outer seal member against the end plate; wherein the annular inner seal member, the annular outer seal member, and the annular middle element are disposed within the seal housing in a manner so as to be substantially non-rotatable relative to the rotor shaft during rotation of the rotor shaft.