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US 4,378,838 AGranted
Pipe wipers and cups therefor
AssigneeOtis Engineering Corporation
InventorsJames D. Ogden, Pat M. White
Life of this patent
Estimating the term…
Abstract
An improved pipe wiper and cup therefor having at least one cup-like wiper lip which is strengthened by a plurality of radial webs which tend to keep the wiper lip from turning wrong side out, the wiper lip also having a plurality of external annular ridges whose diameters correspond to conventional pipe sizes so that the lip can be trimmed to proper size before use leaving an external ridge on the outer edge of the lip to enhance the wiping efficiency of the lip.
Claims10
A pipe wiper, comprising:
- a. a body;
- b. at least one resilient external annular cup-like flange on said body extending outwardly and rearwardly;
- and
- c. a plurality of radially disposed, longitudinally extending webs integral with said body and said flange for strengthening said flange to better resist being turned wrong side out.
1 more element
A pipe wiper device, comprising:
- a. an elongate rigid mandrel having a support shoulder thereon;
- b. resilient wiper means on said mandrel abutted against said support shoulder, said resilient wiper means having a body with at least one external annular flange extending outwardly and rearwardly to form a wiper lip to engage the internal wall of a pipe string;
- c. a plurality of strengthening webs extending radially between said body and said at least one flange and being integral therewith for retaining said at least one flange in proper shape for wiping the inner wall of said pipe string;
- and
- d. means on said mandrel for holding said wiper means abutted against said abutment shoulder.
2 more elements
A pipe wiper, comprising:
- a. an elongate mandrel having an enlarged nose portion on its forward end providing a rearwardly facing shoulder;
- b. resilient wiper means mounted on said mandrel and engaging said rearwardly facing shoulder, said resilient wiper means including at least one wiper cup, each of said at least one wiper cup comprising:
- i. a rigid tubular body;
- ii. a resilient body surrounding said rigid tubular body and attached thereto, said resilient body having a tubular portion with an annular flange extending outwardly and rearwardly when said wiper means is mounted on said elongate mandrel, the outer edge or rim of said flange providing a lip adapted to engage the inner wall of a pipe string;
- and
- iii. a plurality of radially disposed, longitudinally extending webs formed integral with said tubular portion and said flange for strengthening said flange to better resist being turned wrong side out;
- and
- e. means on said elongate mandrel for holding said resilient wiper means in engagement with said rearwardly facing shoulder of said nose portion.
5 more elements
A wiper cup for use on a pipe wiper, comprising:
- a. a rigid tubular body;
- b. a resilient body formed with a tubular portion having a forward end and a rearward end surrounding and attached to said rigid tubular body and having an annular flange thereon extending outwardly and rearwardly, the outer edge or rim of said flange being adapted to engage and wipe the inner wall of a pipe string as the pipe wiper is moved forwardly therethrough;
- and
- c. a plurality of radially disposed, longitudinally extending webs formed integral with said tubular portion and said external flange of said resilient body, said webs enabling said resilient body to better retain its original shape and resist being turned wrong side outward.
1 more element
Dependencies are inferred from the claim text.