Title: Mechanical seal assembly with flushing means

Abstract: A reliable, long-wearing mechanical seal for a shaft entering a vessel is prepared employing two bellows seals in tandem and providing a path for a flushing fluid between the bellows seals.

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Inventors: Ritzie, Robert H. (Mystic, CT, US)

Application Number: 853938
Filing Date: 1977-11-23
Publication_date: 1978-12-19
Assignee: The Dow Chemical Company (Midland, MI)
Primary Class(es): 277/361 277/408
Other Classes:
US Patent Ref:

2688520	Sep, 1954	Covington	277/59.
2723868	Nov, 1955	Hartranft	277/81.
3484113	Dec, 1969	Moore	277/65.
3643964	Feb, 1972	Snelling et al.	277/24.
3943717	Mar, 1976	Schexnayder	277/59.
4062549	Dec, 1977	Kemp	277/12.
4071253	Jan, 1978	Heinen et al.	277/88.

Other Refs:
Primary Examiner: Ward, Jr., Robert S.
Assistant Examiner:
Attorney: