OBJETO DE PLASTICO, COMO UNA CAJA, ETC., CON UN ELEMENTO DE REFUERZO EN UNA BOCA DE UNA ABERTURA DE PASO.

摘要

A housing includes a plastic member having a central opening, and a reinforcing element of wholly rigid and imperforate material in the form of a hollow sleeve imbedded within the member. This sleeve is coincident with the opening and has an outer end flush with an outer end of the member. A first inner wall portion of the sleeve adjacent such one end has a diameter equal to the diameter of the central opening, and this first inner wall portion being threaded for engagement with a threaded object to be connected to the housing. The sleeve has a second inner wall portion of a diameter greater than the diameter of the opening so as to define an annular space which is occupied by a portion of the plastic member.