Tightening arrangement for packing rings of a packing box

Details Tightening arrangement for packing rings of a packing box Tightening arrangement for packing rings of a packing box

1988-05-24

1990-06-26

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277105, F16K 4102

Patent

active

049365924

ABSTRACT:
The present invention relates to a sealing arrangement for sealing a rotary shaft by means of several adjacent ring-type packings arranged in a packing box. The disadvantage of known arrangements is that, in box-type sealings, only the packing rings disposed nearest to the clamping element are clamped effectively. In the arrangement of the invention, an intermediate gland (11) is arranged between packing rings (8, 9) and said intermediate gland is forced to move to the left while the screws (13) are being screwed up. The desired effect is achieved by providing the ends of each screw (13) with divergent threads (16, 17), which are provided with an unequal or equal pitch.

REFERENCES:
patent: 1475993 (1923-12-01), Harris et al.
patent: 1757311 (1930-05-01), Kahle
patent: 4765631 (1988-08-01), Kohnen et al.

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