Seal assembly and the assembling method thereof

A seal assembly for sealing connection region between a glass and a shaft assembly passing through the glass, said shaft assembly comprising a shaft and a threaded bushing around the shaft, the seal assembly comprising:

• an outer seal, having a body portion used to be supported on the glass, the outer seal further comprising at least one first sealing portion to form at least one sealing area;
• an inner rotatable seal, having a body portion with a thread for engaging a thread of the bushing, the inner rotatable seal further comprising at least one second sealing portion to form at least one sealing area,
• wherein the body portion of the outer seal and the body portion of the inner rotatable seal each has corresponding threads for engaging the outer seal with the inner rotatable seal,
• wherein the outer seal has a centre bore defined along a longitudinal axis, the shaft and the bushing extending through the centre bore, the first sealing portion of the outer seal has an extension extending substantially in a radical direction away from the longitudinal axis and a protrusion adjacent to the centre bore, wherein the protrusion contacts the bushing sealingly from outside of the glass to form a first sealing area, and a portion of the extension contacts the exterior surface of the glass to form a second sealing area, and
• wherein the extension of the first sealing portion further comprises a flat surface which forms a glass positioning feature of the outer seal.

A seal assembly for sealing connection region between a glass and a shaft assembly passing through the glass, said shaft assembly comprising a shaft and a threaded bushing around the shaft, the seal assembly comprising:

• an outer seal, having a body portion used to be supported on the glass, the outer seal further comprising at least one first sealing portion to form at least one sealing area;
• an inner rotatable seal, having a body portion with a thread for engaging a thread of the bushing, the inner rotatable seal further comprising at least one second sealing portion to form at least one sealing area,
• wherein the body portion of the outer seal and the body portion of the inner rotatable seal each has corresponding threads for engaging the outer seal with the inner rotatable seal,
• wherein the body portion of the outer seal is made of hard plastic and the first sealing portion is made of soft rubber, and the body portion of the outer seal and the first sealing portion are overmolded as one piece, and
• wherein the annular sealing ring engages with the bushing and the outer seal in interference fit.