Hydraulically dynamic mono-pig scraper
0 Assignments
0 Petitions
Accused Products
Abstract
The invention concerns a pig scraper for cleaning the inside wall of a coating agent conduit. The pig scraper includes a body insertable in the conduit and at least one sealing lip that seals against the inside wall of the conduit and extends parallel to a longitudinal axis of the body. A space is defined between the sealing lip and the body to form a pocket for enhancing the sealing of the sealing lip with respect to the conduit. The length of the sealing lip substantially prevents the lip from folding over on itself in response to a change in the direction of movement of the pig scraper in the conduit.
32 Citations
29 Claims
-
1-16. -16. (canceled)
-
17. A pig scraper for cleaning an internal surface of a conduit conveying coating, comprising:
-
a body having a length and a longitudinal axis; and
at least one sealing lip extending and spaced from said body portion including an outer surface spaced from said internal surface of said conduit, an annular sealing edge projecting from said outer surface of said sealing lip generally triangular in cross-section adjacent to but spaced from a free end of said sealing lip including first and second faces extending at an acute angle to said internal surface of said conduit and an apex resiliently biased against said internal surface of said conduit. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A pig scraper for cleaning an internal surface of a conduit conveying a coating, comprising:
-
an integral body portion having a longitudinal axis, a length and opposed cylindrical end portions each having a flat end face; and
opposed resilient sealing lips integral with said body portion spaced from and surrounding one of said cylindrical end portions spaced from said flat end face each including an outer edge extending toward but spaced from said flat end face resiliently biased against said internal surface of said conduit. - View Dependent Claims (26, 27, 28, 29)
-
Specification