Pipes and tubular conduits – End protectors – Threaded
Patent
1981-04-10
1982-07-06
Bryant, III, James E.
Pipes and tubular conduits
End protectors
Threaded
138 89, B65D 5906
Patent
active
043377998
ABSTRACT:
A thread protector for the external threads of pipes comprising a thread cap structure that is composed of plastic material and defines internal threads that are adapted to receive the externally threaded pin portion of a pipe. The outer extremity of the thread cap is formed to define a reduced diameter receptacle portion that receives a mating metal cap structure in such a manner that the thread cap and metal cap define a substantially contiguous annular outer surface. The metal cap is formed to define an annular body portion that defines a plurality of spaced apertures that are adapted to receive the plastic material of the thread cap to establish an interlocked relation between the plastic and metal cap structure. The metal cap defines a substantially planar circular end wall flange forming an opening through which an end wall portion of the plastic inner body protrudes. A plurality of projections extend from the plastic end wall and are oriented in substantially rectangular manner to enable a straight tool, such as a bar or screwdriver to engage at least two of the projections and thus facilitate rotation of the thread protector for installation and removal. The plastic end wall structure is also formed to define a rectangular central opening into which a rectangular tool may be inserted for installation and removal of the thread protector and for lifting of pipe sections by means of cable and hook pipe handling systems. External integral plastic ribs are provided to enhance manual handling capability.
REFERENCES:
patent: 1000375 (1911-08-01), Cable
patent: 2251897 (1941-08-01), Severn
patent: 4020873 (1977-05-01), Palarino
patent: 4157100 (1979-06-01), Turk
patent: 4239062 (1980-12-01), Callicoatte
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