Patent ID: 6805360
Filing Date: 2004-10-19
Classification: G05D,Y10T

Abstract:
A bi-directional seal assembly to create a seal between a body and a movable elongate generally cylindrical member which slides axially across said seal assembly creating a seal between the body and the member, the seal assembly comprising;a body with a chamber; a member having a generally cylindrical exterior surface portion and being movably mounted in the chamber; a channel in the body having four sides, three of which are of generally the same length, and a fourth side having a length which is less than the length of the other sides forming an opening; an o-ring positioned in the channel; and a seal ring having a generally rectangular cross-section with opposite sides and positioned in the opening, the seal ring sized and arranged to encircle and seal against the generally cylindrical exterior surface portion, when pressurized fluid enters the channel from the upstream fluid source or the downstream fluid source, it causes distortion of the o-ring which applies pressure to an outer circumference of the seal ring causing an increase in pressure between an inner circumference of the seal ring and the generally cylindrical exterior surface, said generally cylindrical exterior surface portion extending beyond the opposite sides of the seal ring.