Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1982-06-09
1984-01-17
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 53, 277 65, F16J 1534
Patent
active
044260890
ABSTRACT:
A dust-proof device for preventing dust from entering into sliding surfaces from the inside thereof in a mechanical seal for avoiding the leakage of fluid from the outside into the inside of the sliding surfaces, which mechanical seal comprises a seating ring which receives therethrough a rotary shaft and a follower ring which is rotated together with the rotary shaft in sliding contact with the seating ring. The dust-proof device comprises a dust-proof disk which is attached to the rotary shaft. This disk is opposed to the end face of the seating ring with leaving a small clearance between them and the above end face is the opposite surface relative to the sliding surface of the seating ring. The dust-proof disk is rotated together with the rotary shaft to avoid the entering of dust into the clearance, thereby preventing the dust from entering into the sliding surfaces. Further, it is possible to seal up the clearance by bringing the peripheral portion of the dust-proof disk into contact with the end face of seating ring continuously or temporarily during the stoppage of the rotary shaft.
REFERENCES:
patent: 2882075 (1959-04-01), Biering et al.
patent: 2908536 (1959-10-01), Dickey
patent: 2936715 (1960-05-01), Southam et al.
patent: 3895811 (1975-07-01), Richard et al.
patent: 4194745 (1980-03-01), McDougal
Fukuoka Tatsuhiko
Takenaka Akira
Smith Robert I.
Taiho Kogyo Co. Ltd.
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