Hybrid floating brush seal

Details Hybrid floating brush seal Hybrid floating brush seal

Filed on

1996-10-22

Date issued

1999-12-07

Examiner

Knight, Anthony

Patent Class

Seal for a joint or juncture

SubClass

Seal between relatively movable parts

SubSubClass

Diverse and distinct dynamic seals

Other Related Categories

277355, 277362, 277400, F16J 1534, F16J 15447

Type

Patent

Status

active

Patent number

059970049

Description

ABSTRACT:
A hybrid floating brush seal (10) generally includes a brush (30) that encircles a rotating shaft (12). The brush (30) includes a bristle portion (32) that is carried by a holder (34). A self acting film device such as a spiral groove seal (52) is disposed adjacent to a back plate (36) of the holder (34). A collar (72) is disposed adjacent to a front plate (38) of the holder (34). A plurality of pins (70) and springs (76) act to bias the brush (30) away from the collar (72) towards the spiral groove seal (52). When the shaft (12) rotates, the spiral groove seal (52) creates a cushion of air between itself and the back plate (36) of the brush (30) thus forcing the brush (30) against the springs (76). Thus, the brush (30) constantly adjusts its position between the collar (72) and the spiral groove seal (52) while creating minimal friction. A primary seal is formed by the engagement of the bristle portion (32) with the shaft (12) while a secondary seal is formed between the back plate (36) and the spiral groove seal (52).

REFERENCES:
patent: 2365046 (1944-12-01), Bottomley
patent: 2498739 (1950-02-01), Magnesen
patent: 2871041 (1959-01-01), Anderton
patent: 3529839 (1970-09-01), Greiner et al.
patent: 3655206 (1972-04-01), Adams
patent: 4265455 (1981-05-01), Lundgren
patent: 4403779 (1983-09-01), Wilkinson
patent: 4486026 (1984-12-01), Furumura et al.
patent: 4696480 (1987-09-01), Jornhagen
patent: 5026252 (1991-06-01), Hoffelner
patent: 5106104 (1992-04-01), Atkinson et al.
patent: 5135237 (1992-08-01), Flower
patent: 5143384 (1992-09-01), Lipschitz
patent: 5318309 (1994-06-01), Tseng et al.
patent: 5474305 (1995-12-01), Flower
patent: 5496045 (1996-03-01), Millener et al.

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