Pipe joints or couplings – With assembly means or feature – Guide and support
Patent
1994-09-30
1997-01-28
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Guide and support
285 91, 285349, 285365, 285409, F16L 3500
Patent
active
055971849
ABSTRACT:
A clamp for quick release of a generally rectangular bonnet to the flange of valve body is disclosed. The upper side of the edge of the rectangular bonnet is formed with a bevel of about 20 degrees and the lower side of the edge of the body flange is formed with a similar bevel. The clamp consists of semi-circular ends and straight sides hinged together. One side is split and connected by a toggle latch. In cross-section, each clamp section is generally C-shaped, with the top and bottom arms of the C being beveled so that as the clamp sections are drawn inward the bevels wedge the bonnet against the flange. Locating pins fitting into holes in the plate and flange locate the parts and resist implosion when the valve body is subjected to vacuum. To maintain uniform clamping force around the circumference of the bonnet the bevels at the middles of the sides may be less wide than at the ends.
REFERENCES:
patent: 3042430 (1962-07-01), Guy
patent: 3705737 (1972-12-01), Westerlund et al.
patent: 4170260 (1979-10-01), Rudd et al.
patent: 4969923 (1990-11-01), Reeder
patent: 5320391 (1994-06-01), Luthi
Brenes Arthur J.
Van De Graff Fabian M.
Arola Dave W.
Caplan Julian
High Vacuum Apparatus Mfg., Inc.
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