Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent
1985-11-19
1987-05-12
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
B08B 904
Patent
active
046637958
ABSTRACT:
An improved integrally formed pig apparatus is provided which comprises a pig body member and a plurality of scraper cup members supported on the pig body member in a spaced apart tandem relationship. Each of the scraper cup members is provided with a substantially external parabolic configuration and comprises a curvilinearly-shaped outer wall defining a partially hollow interior, the outer wall characterized as having a body portion and a distal end portion. The outer wall of the scraper cup members is provided with a varying wall thickness ranging from relatively thin at the distal end portion to relatively thick nearing the center of the body portion so that when an external force is applied to the cup members by the pipeline wall the distal end portion of the outer wall of the cup members is flexed inwardly while maintaining scraping contact with the pipeline wall along a substantial portion of the body portion of the scraper cup members.
REFERENCES:
patent: 2276109 (1942-03-01), Smith
patent: 3480984 (1969-12-01), Kidd
patent: 3496588 (1970-02-01), Ver Nooy
patent: 4275475 (1981-06-01), Schwartz et al.
patent: 4413370 (1983-11-01), Payne et al.
McCarthy Bill D.
Roberts Edward L.
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