Title: Guided expansion joint

Abstract: A guided expansion joint (1) for fluidically connecting two pipes (2,3) in sealed relationship includes low friction annular guides (11,12) at each end of the expansion joint (1) intermediate the slip (4) and the external sleeve (5). A conventional stuffing box (18) provides the seal between the external sleeve (5) and slip (4) while the annular guides (11,12) protect the slip (4) against wear and scoring in the event that the slip (4) and external sleeve (5) depart from the preferred aligned relationship.

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Inventors: Hannah, Martin J. (Williamsville, NY, US)

Application Number: 916585
Filing Date: 1978-06-19
Publication_date: 1980-09-30
Assignee: Advanced Thermal Systems, Inc. (Lancaster, NY)
Primary Class(es): 277/627 285/231, 285/302, 384/129
Other Classes:
US Patent Ref:

1947072	Feb, 1934	Walton et al.	277/68.
2319543	May, 1943	Hall	277/28.
3026114	Mar, 1962	Andresen et al.	277/68.
3082012	Mar, 1963	Rhodes	277/21.
3473060	Oct, 1969	Powell	308/238.
3876213	Apr, 1975	Miliczky et al.	277/2.
3932007	Jan, 1976	Schnell	308/238.

Other Refs: 981498

Jan, 1965	GB

Primary Examiner: Callaghan, Thomas F.
Assistant Examiner:
Attorney: Bean, Kauffman & Bean