Sealing ring retention device

Claim 2

A sealing ring retention device, adapted to cooperate with a stationary sealing ring assembly forming part of a rotary mechanical fluid seal, consisting of a housing having an inner shell provided with a shaft opening, an outer shell, and a back wall integrally connected to both the inner shell and outer shell to provide a chamber, a primary sealing ring provided with a forwardly protruding annular sealing face, an axial bore, and an enlarged outside surface having a pair of key slots, resilient means interposed between said back wall and said primary sealing ring urging said primary sealing ring away from said back wall, a sealing ring retention device comprising a pair of keys, each key having a base and two upstanding parallel sides and an upstanding end forming a channel in cooperation with said two upstanding parallel sides, means fastening each key to said outer shell and within said chamber, with said pair of key slots surrounding, respectively, said pair of keys to prevent said primary sealing ring from rotating in relation to said housing, and a locking ring having an open ended wire loop body with the opposite ends formed at right angles to the loop body and parallel to each other, the loop body being located in the channel of one of said pair of keys, the open end of the wire loop being located in the channel of the other of said pair of keys with opposite ends located within the last mentioned key and between the two upstanding parallel sides, thereby, to secure the locking ring within said pair of keys to prevent said primary sealing ring from moving out of said chamber.

Claim 3

A sealing ring retention device, adapted to cooperate with a stationary sealing ring assembly forming part of a rotary mechanical fluid seal according to claim 1 in which a vibration damping collar is provided with an axial bore and a pair of key slots, said vibration damping collar being interposed between said primary sealing ring and said resilient means with said last mentioned pair of key slots, respectively, surrounding said pair of keys, and with said axial bore surrounding said inner shell.

Claim 4

A sealing ring retention device, adapted to cooperate with a stationary sealing ring assembly forming part of a rotary mechanical fluid seal according to claim 2 in which said primary sealing ring is provided with a circular recess, and a secondary sealing means located within said circular recess and around said inner shell.

Claim 5

A sealing ring retention device, adapted to cooperate with a stationary sealing ring assembly forming part of a rotary mechanical fluid seal, consisting of a housing having an inner shell provided with a shaft opening, an outer shell, and back wall integrally connected to both the inner shell and outer shell to provide a chamber, a spacing collar having an inside diameter, and a front surface, means fastening said spacing collar to said inner shell in fluidtight relationship, a primary sealing ring provided with a forwardly protruding annular sealing face, an axial bore, a circular recess, a vertical wall and an enlarged outside surface having a pair of key slots, a back up washer having an outside surface and a circular opening said washer being located in said circular recess abutting said vertical wall with said circular opening surrounding said inner shell; a wavy circular spring having an axial opening surrounding said inner shell and abutting said back up washer, a secondary sealing ring having an outside surface, an inside surface, and a rear surface, said sealing ring being located in said circular recess with said outside surface engaging said circular recess and with said rear surface engaging said front surface in fluid tight relationship, said wavy circular spring urging said forwardly protruding annular sealing face away from said back wall, and a sealing ring retention device comprising a pair of keys, each key having a base and two depending parallel sides and a depending end forming a channel in cooperation with said two depending parallel sides, means fastening each key to said outer shell with said pair of key slots surrounding said pair of keys, respectively, to prevent said primary sealing ring from rotating in relation to said housing, and a lock ring located in said pair of keys to retain said primary sealing ring in said housing.

Claim 6

A sealing ring retention device, adapted to cooperate with a stationary sealing ring assembly forming part of a rotary mechanical fluid seal, consisting of a housing having an inner shell provided with a shaft opening, an outer shell, and back wall integrally connected to both the inner shell and outer shell to provide a chamber, a spacing collar having an inside diameter, and a front surface, means fastening said spacing collar to said inner shell in fluidtight relationship, a primary sealing ring provided with a forwardly protruding annular sealing face, an axial bore, a circular recess, a vertical wall and an enlarged outside surface having a pair of key slots, a back up washer having an outside surface and a circular opening said washer being located in said circular recess abutting said vertical wall with said circular opening surrounding said inner shell; a wavy circular spring having an axial opening surrounding said inner shell and abutting said back up washer, a secondary sealing ring having an outside surface, an inside surface, and a rear surface, said sealing ring being located in said circular recess with said outside surface engaging said circular recess and with said rear surface engaging said front surface in fluid tight relationship, said wavy circular spring urging said forwardly protruding annular sealing face away from said back wall, and a sealing ring retention device comprising a pair of keys, each key having a base and two depending parallel sides and a depending end forming a channel in cooperation with said two depending parallel sides, means fastening each key to said outer shell with said pair of key slots surrounding said pair of keys, respectively, to prevent said primary sealing ring from rotating in relation to said housing, and a lock ring located in said pair of keys to retain said primary sealing ring in said housing.