Shaft sealing device having a positioning ring and a...

Details Shaft sealing device having a positioning ring and a... Shaft sealing device having a positioning ring and a...

2005-08-30

2005-08-30

Pickard, Alison (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S373000

Reexamination Certificate

active

06935633

ABSTRACT:
A shaft sealing device includes a shaft tube, a main body, a fixed sealing ring, a positioning ring and a retaining ring. The shaft tube is provided with an outer flange and a rotary ring mounted thereto. The main body has an axial hole for supporting the shaft tube which is rotatably extended therethrough. The fixed sealing ring and the retaining ring are inserted in the axial hole of the main body while the positioning ring being mounted in the axial hole. The fixed sealing ring, the retaining ring and the positioning ring are disposed on the shaft tube in loose fit manner to allow for rotation. The fixed sealing ring has a first side to abut against the rotary ring, and a second side to connect to the retaining ring. The positioning ring is provided with elastic members adapted to bias the retaining ring against the fixed sealing ring.

REFERENCES:
patent: 3578344 (1971-05-01), Yost
patent: 4639000 (1987-01-01), Warner
patent: 4989882 (1991-02-01), Warner et al.
patent: 5797602 (1998-08-01), Less
patent: 6145841 (2000-11-01), Maeda
patent: 6357753 (2002-03-01), Yamasaki et al.
patent: 6460858 (2002-10-01), Kitajima et al.
patent: 6685191 (2004-02-01), Toal
patent: 2002/0060431 (2002-05-01), Takahashi
patent: 454827 (2001-09-01), None
patent: 454839 (2001-09-01), None
patent: 459938 (2001-10-01), None

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