Deformable pull plug

a pull plug and deformation technology, applied in the direction of liquid handling, application, and closure using stoppers, can solve the problems of affecting the ability of the operator, affecting the appearance of the coating part, and further affecting the ability to form a complete seal, so as to reduce the defect of the coating and improve the appearance of the coated par
US20040056039A1Inactive Publication Date: 2004-03-25ENGINEERED PRODS & SERVICES
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ENGINEERED PRODS & SERVICES
Publication Date
2004-03-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

A reusable pull plug for masking part openings in parts to be coated or otherwise worked upon. The pull plug has particular utility in masking irregular surface portions about the part opening including, without limitation threaded, chamfered, stepped and spot faced surfaces. The pull plug is comprised of a deformable, segmented body including plug, transition and tail body segments. A flange and void volume, or "dimple," are formed in one plug body end adjacent the plug segment. The pull plug is pulled into the part opening by the tail segment and the plug segment forms a frictional fit with the deformable body tightly sealing the part opening. The flange covers the first thread in threaded part openings and further covers chamfered, stepped and spot faced surfaces protecting those surfaces from contact by the coating or other materials. The void volume facilitates deformation of the flange and plug segment permitting the flange to conform to the surface about the part opening and permitting the pull plug to be withdrawn through the part opening in the same direction as inserted thereby avoiding damage to the applied coating material. The novel design reduces stresses on the pull plug and enables the plug to be reused through repeated coating or operation cycles.
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Description

[0001] This invention is related generally to masking apparatus and, more specifically, to masking apparatus for covering openings in parts during coating and other operations.

[0002] Many types of manufactured parts, such as parts used in fabrication, aerospace and final assemblies must be coated with various materials and substances to adapt those parts for their intended end use. Such coatings are typically selected to impart desired characteristics to the coated part. For example, the coating may impart corrosion resistance to the part or may be selected to impart a selected surface finish or cosmetic appearance to the part.

[0003] As is known, many different types of materials can be applied to the parts during coating operations. These materials include, for example, nylons, polycarbonates, metals and other known materials.

[0004] There are many coating technologies available and the specific coating procedure can be selected based on the specific application. Modern coating oper...

Claims

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