Venting cap system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorThomas C. Cannon
Life of this patent
Estimating the term…
Abstract
A venting cap system includes a first open-ended sleeve and a second open-ended sleeve. The first open-ended sleeve is made from a first material that melts at a selected temperature. The first open-ended sleeve has an internal region commencing at a first end and an externally-threaded region commencing at a second end. The second open-ended sleeve is made from a second material that does not melt at the selected temperature. The second open-ended sleeve is coaxially fitted in the first open-ended sleeve. The second open-ended sleeve includes a first end that is flush with the first end of the first open-ended sleeve. The second open-ended sleeve partially overlaps part of the externally-threaded region. The coefficients of linear expansion of the first material and the second material are about equal.
Claims24
A venting cap system, comprising:
- a first open-ended sleeve of a first material for melting at a selected temperature, said first open-ended sleeve includes an internal region to commence at a first end thereof and defines a diameter DS, said first open-ended sleeve includes an externally-threaded region to commence at a second end thereof,
- wherein said externally-threaded region defines
- a minor diameter DT;
- and
- an inner sleeve of a second material being a solid at said selected temperature,
- wherein said inner sleeve is coaxially fitted in said first open-ended sleeve so that said first open-ended sleeve is bonded to said inner sleeve, wherein said inner sleeve includes a first end flush with said first end of said first open-ended sleeve, wherein said inner sleeve includes a portion, which axially overlaps at least part of said externally-threaded region by an amount L, wherein L<(DT2−DS2)1/2, and
- wherein said first material and said second material include coefficients of linear expansion that are about equal.
A venting cap system, comprising:
- a first open-ended sleeve of a thermoplastic material for melting at a selected temperature, said first open-ended sleeve includes an internal region commencing at a first end thereof and defines a diameter DS, said first open-ended sleeve includes an externally-threaded region to commence at a second end thereof where said externally-threaded region defines a minor diameter DT;
- and
- an inner sleeve of a metal being a solid at said selected temperature, wherein said inner sleeve is coaxially fitted said first open-ended sleeve so that said first-open-ended sleeve is bonded to said inner sleeve, wherein said inner sleeve includes a first end flush with said first end of said first open-ended sleeve, wherein said inner sleeve includes a portion axially, which overlaps at least part of said externally-threaded region by an amount L, wherein L is a maximum value satisfying L<(DT2−DS2)1/2, and
- wherein said first material and said second material include coefficients of linear expansion that are about equal.
A venting cap system, comprising:
- a first open-ended sleeve of a first material for melting at a selected temperature, said first open-ended sleeve includes an internal region to commence at a first end thereof and defines a diameter DS, said first open-ended sleeve includes an externally-threaded region to commence at a second end thereof where said externally-threaded region defines a minor diameter DT;
- and
- an inner sleeve of a second material being solid at said selected temperature, wherein said inner sleeve is coaxially fitted in said first open-ended sleeve with at least a portion of external surfaces of said inner sleeve being knurled for engagement with said first open-ended sleeve so that said first-open-ended sleeve is bonded to said inner sleeve, wherein said inner sleeve includes a first end flush with said first end of said first open-ended sleeve, wherein said inner sleeve includes an internally-threaded region to commence at said first end thereof, and wherein said inner sleeve includes a portion axially, which overlaps at least part of said externally-threaded region by an amount L, wherein L<(DT2−DS2)1/2, and
- wherein said first material and said second material include coefficients of linear expansion that are about equal.
Dependencies are inferred from the claim text.