A device that protects the inner surface of pipes from rust is disclosed. This device is especially useful for pipes provided with threading and a thread guard at their threaded ends to form an airtight seal. The device comprises a holder that can be inserted in the pipes on which a number of receptacles are attached at intervals. The receptacles are filled with a drying agent or dessicant and are made of a moisture permeable material. A moisture indicator may be placed in the base of the thread guard.
申请公布号
US4438783(A)
申请公布日期
1984.03.27
申请号
US19820366981
申请日期
1982.04.09
申请人
DREYFUSS, WILFRIED;REMP, THOMAS E.
发明人
DREYFUSS, WILFRIED;REMP, JR., THOMAS E.;MUELLER, KURT