Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1998-04-13
1999-04-20
Bell, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
1563042, 1563046, 1563082, B25B 514
Patent
active
058955437
ABSTRACT:
A clamping apparatus for use in clamping a fitting to a pipe or other fitting. The apparatus may be used without supporting the outer surface of the pipe on the opposite side of the fitting, and in the case of a buried pipe, only a portion of the pipe needs to be excavated. The apparatus comprises a clamping plate for engaging an outer surface of the fitting with an adjusting stem threadingly engaged with the clamping plate. A locking bar is pivotally and rotatably attached to an end of the adjusting stem. A weight differential between long and short ends of said locking bar and a cable are used to pivot the locking bar between a first position thereof wherein the locking bar and a portion of the stem may be inserted through aligned openings in the fitting and pipe and a second position. In the second position, the clamping bar may be clampingly engaged with an inner surface of the pipe by rotation of the adjusting stem which also results in the clamping plate being clampingly engaged with an outer surface of the fitting. A lock nut locks the apparatus in the clamping position. The fitting may then be permanently attached to the pipe, such as by an electrofusion process, after which the apparatus may be unclamped and removed. A method of attaching a fitting to a pipe using the apparatus is also disclosed.
REFERENCES:
patent: 4486650 (1984-12-01), Bridgstock et al.
patent: 4615514 (1986-10-01), Hamlin
patent: 4927476 (1990-05-01), Watkins
patent: 5129636 (1992-07-01), Bridgstock et al.
Central Plastics Company Flyer entitled "Polyethylene Saddles for Lateral Service Connections" (undated but admitted to be prior art).
Central Plastics Company "Electrofusion Systems Computer Controlled Fusion Operation and Training Manual" (undated but admitted to be prior art).
Central Plastics Company brochure entitled "Fusion Procedures Butt, Socket, Saddle" (undated but admitted to be prior art).
Bell Michael W.
Central Plastics Company
Yao Sam Chuan
LandOfFree
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