Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Reexamination Certificate
2000-08-30
2002-11-05
Sakran, Victor (Department: 3677)
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
C024S273000, C024S270000, C059S060000, C285S234000
Reexamination Certificate
active
06473945
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to flange clamps and, in particular, to multi-link flexible clamps for securing together the ends of two opposed flanged pipes.
BACKGROUND OF THE INVENTION
Flange clamps are known and used, for example, in the vacuum technology industry which consist of two C-shaped collar halves which are pivoted together for fitting over and around the flanges of two pipes to be connected together and are secured together with a swing bolt.
Flange clamps in the form of a chain are also used and offer the advantage that the clamping forces are uniform around the flanges and are easy and relatively quick to fit.
However, known clamps are designed for specific flange sizes and do not offer versatility in terms of their being suitable for other sizes of flange.
REFERENCES:
patent: 764659 (1904-07-01), Coleman
patent: 916169 (1909-03-01), Langford
patent: 1804701 (1931-05-01), Mojonnier
patent: 2775806 (1957-01-01), Love
patent: 3464722 (1969-09-01), Larkin
patent: 4438958 (1984-03-01), DeCenzo
patent: 4473365 (1984-09-01), Lapeyre
patent: 4815270 (1989-03-01), Lapeyre
patent: 5707089 (1998-01-01), Heinrich
patent: 5713737 (1998-02-01), Sundstrom et al.
patent: 197 50 251 (1999-06-01), None
Cohen Joshua L.
Pace Salvatore P.
Sakran Victor
The BOC Group plc
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