Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-02-28
1991-01-29
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
74 182, 403 51, 464175, F16J 1550
Patent
active
049881132
ABSTRACT:
There is provided a protective boot which provides an essentially constant volume chamber around a reciprocating shaft to prevent the inspiration of atmospheric contaminants into the area around the shaft.
The boot defines a chamber, which comprises two sections, a longitudinally extendible and contractible first section and a radially extendible and contractible second section. The second section is constructed of elements or portions which flex outwardly or pop out from a neutral position in response to an increase in pressure in the section, and other portions which flex inwardly from a neutral position in response to a decrease in pressure. The portions flex outward at a predetermined pressure which is higher than the neutral or atmospheric pressure. When a pressure decrease from neutral occurs, a relatively low pressure is reached, which is sufficient to initiate the inward flexing from a neutral position of other portions of the section.
Therefore, the contour of the boot changes at predetermined pressures to provide an essentially constant volume chamber around a reciprocating shaft to prevent the inspiration of atmospheric contaminants into the area around the shaft.
REFERENCES:
patent: 4058018 (1977-11-01), Lauper
patent: 4407517 (1983-10-01), Neyer
patent: 4702483 (1987-10-01), Ukai et al.
Babcock Industries Inc.
Cuchlinski Jr. William A.
Folker J.
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