Package rotating shaft seal assembly

Claim 2

A package rotary seal assembly for rotatably sealing a shaft extending through a passage in a vessel wall said seal assembly comprising: a. an outer rotating seal surrounding said shaft including a pair of members, one member of said pair being a rotating member and another being a stationary member; b. an inner rotating seal surrounding said shaft and mounted concentrically within said outer rotating seal, said inner rotating seal including a pair of members, one member of said pair being a rotating member and another member being a stationary member; c. a retainer fixed to and sealed about the periphery of said shaft and extending radially outward therefrom; d. means carried by said retainer for supporting each of said rotating members one of said rotating members being rigidly attached and axially fixed to said retainer and another of said rotating members being axially movable with respect to said retainer; e. means for attaching said stationary members to said vessel about said passage; f. said rotating and stationary members each having a sealing surface thereon with one member of each pair being axially movable toward another to abut said sealing surfaces; and g. means carried by said inner and outer concentric rotating seals for urging said rotating and stationary members of each pair together to seat said sealing surfaces thereon one against another in a fluidtight rotary engagement.

Claim 3

A seal assembly as set forth in claim 1 further comprising means for rigidly connecting said rotating and stationary members of each pair together to facilitate removal of said inner and outer concentric rotating seals from about said shaft as a unit.

Claim 4

A rotating shaft seal assembly for use in providing a fluidtight seal between a vessel wall and a shaft passing through an opening in said wall, said rotating shaft seal assembly comprising: a. a retainer including means for fixing and sealing said retainer about said shaft for rotation with said shaft; b. a housing including means for fixing and sealing said housing to said vessel about said opening; c. first rotating seal means for disposition about said shaft having a rotating annular member carried by said retainer and a stationary annular member carried by said housing said rotating and stationary annular members each having a sealing surface; d. second rotating seal means mounted concentrically within said first rotating seal means having a rotating annular member carried by said retainer and a stationary annular member carried by said housing said rotating and stationary annular members each having a sealing surface; e. a cage fixed to said housing for slidably receiving said stationary member of said first rotating seal means; f. bias means in said cage for urging said stationary annular member of said first rotating seal means axially against said rotating annular member of said first rotating seal means; and g. means carried by said second rotating seal means for urging said rotating and stationary members thereof into fluidtight rotary sealing engagement.

Claim 5

A rotating shaft seal assembly for use in providing a fluidtight seal between a vessel wall and a shaft passing through an opening in said wall, said rotating shaft seal assembly comprising: a. a retainer including means for fixing and sealing said retainer about said shaft for rotation with said shaft; b. a housing including means for fixing and sealing said housing to said vessel about said opening; c. first rotating seal means for disposition about said shaft having a rotating annular member carried by said retainer and a stationary annular member carried by said housing said rotating and stationary annular members each having a sealing surface; d. second rotating seal means mounted concentrically within said first rotating seal means having a rotating annular member carried by said retainer and a stationary annular member carried by said housing said rotating and stationary annular members each having a sealing surface; e. a cage fixed to said housing for slidably receiving said stationary member of said first rotating seal means; f. bias means in said cage for urging said stationary annular member of said first rotating seal means axially against said rotating annular member of said first rotating seal means; and g. means carried by said second rotating seal means for urging said rotating and stationary members thereof into fluidtight rotary sealing engagement.

Claim 6

A rotating shaft seal as set forth in claim 3 including means for rigidly connecting said retainer and housing together.

Claim 7

A rotating shaft seal assembly for use in providing a fluidtight seal between a vessel wall and a shaft passing through an opening in said wall, said rotating shaft seal assembly comprising: a. a retainer including means for fixing and sealing said retainer about said shaft for rotation therewith; b. a housing including means for fixing and sealing said housing to said vessel about said opening; c. first rotating seal means for disposition about said shaft having a rotating member carried by said retainer and a stationary member carried by said housing said rotating and stationary members each having a sealing surface thereon; d. second rotating seal means mounted concentrically within said first rotating seal means having a rotating member carried by said retainer and a stationary member carried by said housing said rotating and stationary members each having a sealing surface thereon; e. said stationary members being mounted concentrically on said housing and about said shaft one within another with the sealing surfaces of both of said stationary members facing in the same axial direction; f. said rotating members being mounted concentrically on said retainer and about said shaft one within another with the sealing surfaces of both of said rotating members facing in the same direction axially opposed to the sealing surfaces of said stationary members; and g. means carried by said first and second rotating seal means for urging said rotating and stationary members of each of said seal means into fluidtight rotary sealing engagement.

Claim 8

A rotating shaft seal assembly for use in providing a fluidtight seal between a vessel wall and a shaft passing through an opening in said wall, said rotating shaft seal assembly comprising: a. a retainer including means for fixing and sealing said retainer about said shaft for rotation therewith; b. a housing including means for fixing and sealing said housing to said vessel about said opening; c. first rotating seal means for disposition about said shaft having a rotating member carried by said retainer and a stationary member carried by said housing said rotating and stationary members each having a sealing surface thereon; d. second rotating seal means mounted concentrically within said first rotating seal means having a rotating member carried by said retainer and a stationary member carried by said housing said rotating and stationary members each having a sealing surface thereon; e. said stationary members being mounted concentrically on said housing and about said shaft one within another with the sealing surfaces of both of said stationary members facing in the same axial direction; f. said rotating members being mounted concentrically on said retainer and about said shaft one within another with the sealing surfaces of both of said rotating members facing in the same direction axially opposed to the sealing surfaces of said stationary members; and g. means carried by said first and second rotating seal means for urging said rotating and stationary members of each of said seal means into fluidtight rotary sealing engagement.

Claim 9

A rotating shaft seal assembly as set forth in claim 5 wherein the rotating member of one of said rotating seal means axially overlaps at least in part the stationary member of another of said rotating seal means.