초록 ▼

A rotary threaded penetrator bolt means having a tubular hollow pin therein is employed to contact against a hardened cylindrical punch means to linearly advance the punch without rotation thereof through the wall thickness of the fluid containing member desired to be pierced. In such arrangement, i

A rotary threaded penetrator bolt means having a tubular hollow pin therein is employed to contact against a hardened cylindrical punch means to linearly advance the punch without rotation thereof through the wall thickness of the fluid containing member desired to be pierced. In such arrangement, if the wall thickness of the fluid containing member is sufficiently great, it may be desirable to pre-drill a punch receiving cylindrical recess therein prior to operation of the penetrator bolt means. In addition, prior to insertion of the penetrator bolt means in its receiver means affixed to the fluid containing member, the invention utilizes a seal packing material wrapped about a protruding end portion of the pin means so that upon threaded insertion of the penetrator bolt into the receiver means, a gradual compression of the seal material will occur to create a fluid tight seal about the exterior of the pin means as well as between the receiver means and the outer wall of the fluid containing member prior to actual penetration of the punch through the member wall.

대표청구항 ▼

An improved method for forming a hole in a fluid containing member comprising the steps of: attaching a threaded receiver means to said fluid containing member; threading a drill jig bushing into said receiver means; drilling a cylindrical recess partially through the wall thickness of said fluid co

An improved method for forming a hole in a fluid containing member comprising the steps of: attaching a threaded receiver means to said fluid containing member; threading a drill jig bushing into said receiver means; drilling a cylindrical recess partially through the wall thickness of said fluid containing member; removing said drill jig bushing from said receiver means; wrapping a ribbon seal packing material about the protruding end of a rotatable hollow pin member located in a threaded penetrator bolt; inserting a cylindrical punch in said cylindrical recess; threading said penetrator bolt into said receiver means to thereby compress said packing material about said pin member and against the outer wall of said fluid containing member surrounding said cylindrical recess; and further threading said penetrator bolt into said receiver means to advance the end of said pin against the punch to cause said punch to penetrate the wall of said fluid containing member.