Pig launcher

Details Pig launcher Pig launcher

2005-08-09

2005-08-09

Warden, Sr., Robert J. (Department: 1744)

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

C015S003500, C015S104061, C137S268000

Reexamination Certificate

active

06925671

ABSTRACT:
The ability to pig a pipeline is considered necessary and vital to most pipeline operations. The present invention provides a pig inserting apparatus and method designed to satisfy the need to Insert pigs for large diameter gasoline pipelines that are made of concrete and weigh in excess of 400 pounds. In the past, the industry has used ineffectively manpower or motorized vehicles to insert the pigs. This pig launcher uses a means for propelling the pig that includes: a spool rotatably mounted. The pair of cables is connected to the spool and engage the ends of the cantilevered arms for propelling the pig a pair of cantilevered arms, and a pair of cables of sufficient strength to firmly fasten onto the end of a pipeline.

REFERENCES:
patent: 3404421 (1968-10-01), Surber
patent: 3961493 (1976-06-01), Nolan, Jr. et al.
patent: 4314577 (1982-02-01), Brister
patent: 5104595 (1992-04-01), Hunter
patent: 5208937 (1993-05-01), Cooper
patent: 5601763 (1997-02-01), Hunter et al.
patent: 5769955 (1998-06-01), Kozisek
patent: 5884656 (1999-03-01), Smith
patent: 5927319 (1999-07-01), Burkhalter
patent: 6079074 (2000-06-01), Ellett
patent: 6500271 (2002-12-01), Moore et al.

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