Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1993-11-15
1996-04-09
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Lined
285291, 285915, 285331, 285373, 277205, 24271, F16L 914
Patent
active
055054978
ABSTRACT:
A mechanical coupling device for connecting together two aligned fiberglass reinforced plastic duct sections, each having a terminal end portion of equal diameter, so as to form a leak proof joint that is resistant to fire and also chemical corrosion from gases and/or condensate within the duct sections is disclosed. The device comprises elements that cover and seal the terminal end portion of each said duct section; a central gasket member that covers the end elements and extends around the terminal end portions of the duct sections; a flexible metal sleeve member that surrounds the central gasket member; and tightening devices on the sleeve which compress the central gasket member and hold the aligned adjoining duct sections together to provide a leak-proof joint. The tightening devices are spring driven so that if the bulk of the gasket member is reduced due to fire, the sleeve will maintain a firm non-slip hold on the duct joint. Different embodiments of the coupling device are disclosed using various configurations of the central gasket member and end elements as well as the use of intumescent materials in the gasket member or in a separate bag. The intumescent materials react to fire which may occur in the duct by swelling to further help the coupling device in maintaining a firm non-slip position on the duct joint during such fire conditions.
REFERENCES:
patent: 3686747 (1972-08-01), Bagnulo
patent: 3725105 (1973-04-01), Chase
patent: 3851901 (1974-12-01), Sills
patent: 4043574 (1977-08-01), Asano
patent: 4155574 (1979-05-01), Hulsey
patent: 4518177 (1985-05-01), Deakins
patent: 4538837 (1985-09-01), Cronk
patent: 4538839 (1985-09-01), Ledgerwood
patent: 4643461 (1987-02-01), Thau, Jr. et al.
patent: 4702500 (1987-10-01), Thau, Jr. et al.
patent: 4928998 (1990-05-01), Brandener
patent: 5039137 (1991-08-01), Cankovic et al.
patent: 5180193 (1993-01-01), Rung et al.
patent: 5329673 (1994-07-01), Mason
Shea John J.
Shea Lawrence E.
Arola Dave W.
Chun Shackelford Heather
LandOfFree
Mechanical joint connections for fiberglass reinforced duct sect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mechanical joint connections for fiberglass reinforced duct sect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanical joint connections for fiberglass reinforced duct sect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-134531