Double plug head for plugging pipe

Details Double plug head for plugging pipe Double plug head for plugging pipe

2010-05-10

2010-12-14

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

With closures and plugs

Laterally insertable

C138S093000, C138S089000, C138S090000, C138S091000

Reexamination Certificate

active

07849882

ABSTRACT:
A double plug head for plugging a pipe. The double plug head includes a primary rubber packing, a roller support, a tube support and a rubber tube. The primary rubber packing is provided on a mounting plate of a plugging machine. The roller support is provided with a plurality of rollers. The tube support is provided between the primary rubber packing and the roller support. A tube seating depression is formed around the circumferential surface of the tube support. A fluid feed path is formed in the tube support. The rubber tube is seated into the tube seating depression and has a nipple connected to an outlet of the fluid feed path. Communication holes which communicate with the fluid feed path are respectively formed in the primary rubber packing and the mounting plate. A fluid hose is connected to the communication hole of the mounting plate.

REFERENCES:
patent: 2906295 (1959-09-01), Ver Nooy
patent: 3025885 (1962-03-01), Ver Nooy
patent: 3626475 (1971-12-01), Hicks
patent: 3774647 (1973-11-01), Saha et al.
patent: 4202377 (1980-05-01), Harrison
patent: 5082026 (1992-01-01), Smith
patent: 2009/0114301 (2009-05-01), Yeazel et al.
patent: 2009/0114302 (2009-05-01), Yeazel et al.

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