초록 ▼

A delimiter that can be arranged along the sides of a runway. The delimiter can be locked in an upright position for most normal operations. When the runway must be cleared of snow, an operator can lower the delimiters in place, either manually or by motor. After the runway has been cleared of snow,

A delimiter that can be arranged along the sides of a runway. The delimiter can be locked in an upright position for most normal operations. When the runway must be cleared of snow, an operator can lower the delimiters in place, either manually or by motor. After the runway has been cleared of snow, the delimiters can be raised again for use. Unlike the delimiters described above, these delimiters meet all aircraft regulation requirements. When collapsed, they do not protrude above the surface of the ground. The delimiters also have a shear mechanism that allows the raised portion of the delimiter to break off when struck. This shear mechanism protects aircraft by breaking away the upper portion of the delimiter.

대표청구항 ▼

1. A delimiter for use at airports comprising:a) an outer case, said outer case being installed below a ground surface;b) an inner post, positioned in said outer case such that said inner post can be raised and lowered within said outer case for use;c) a means for raising said inner post to a raised

1. A delimiter for use at airports comprising:a) an outer case, said outer case being installed below a ground surface;b) an inner post, positioned in said outer case such that said inner post can be raised and lowered within said outer case for use;c) a means for raising said inner post to a raised operating position, said means of raising said inner post including a handle formed on said inner post; andd) a means for shearing said inner post from said means for raising said inner post when said inner post is struck;e) a means for temporarily locking said inner post in said raised operating position including:i) a first plurality of protruding members, extending outwardly from said inner post;ii) a second plurality of protruding members, extending inwardly within said outer case;iii) whereby said inner post is positioned in said outer case such that the first plurality of protruding members is offset from said second set of protruding members while said inner post is being raised or lowered; andiv) whereby when said inner post is in the raised operating position, said inner post is rotated until said first set of protruding members is aligned with said second set of protruding members such that the second set of protruding members blocks a downward movement of said inner post.2. The delimiter of claim 1 wherein said means for lowering said inner post include a handle formed on said inner post.3. The delimiter of claim 1 wherein the means for raising said inner post includes a motor.4. The delimiter of claim 1 wherein the inner post has a top and further wherein said top of said inner post is below the ground surface when said inner post is in a lowered storage position.5. The delimiter of claim 1 wherein the means for shearing said inner post comprises a plurality of perforations formed about said inner post.6. The delimiter of claim 1 wherein the means for shearing said inner post are above ground when said inner post is in the raised operating position.7. A delimiter for use at airports comprising:a) an outer case, said outer case being installed below a ground surface;b) an inner post, positioned in said outer case such that said inner post can be raised and lowered within said outer case for use;c) a drive motor, installed in said outer case;d) a drive means, operably attached to said drive motor and to said inner post such that when said drive motor rotates in a first direction, said inner post is raised and when said drive motor rotates in a second direction, said inner post is lowered; ande) a means for shearing said inner post from said drive means when said inner post is struck.8. The delimiter of claim 7 further comprising a limit switch, wherein said limit switch is operably attached to said drive motor to limit the upward movement of said inner post.9. The delimiter of claim 7 wherein the inner post has a top and further wherein said top of said inner post is below the ground surface when said inner post is in a lowered storage position.10. The delimiter of claim 7 wherein the means for shearing said inner post comprise a plurality of perforations formed about said inner post.11. The delimiter of claim 7 wherein the means for shearing said inner post are above ground when said inner post is in a raised operating position.12. A delimiter for use at airports comprising:a) an outer case, said outer case being installed underground;b) an inner post, positioned in said outer case such that said inner post can be raised and lowered within said outer case for use;c) a drive motor, fixedly installed in said outer case;d) a base platform, attached to said inner post;e) a worm drive shaft, operably attached to said drive motor and to said base platform; ande) a means for shearing said inner post from said base platform when said inner post is struck.13. The delimiter of claim 12 further comprising a means for preventing said inner post from rotating within said outer case.14. The delimiter of claim 12 further comprising a limit switch, wherein said limit switch is operably attached to said drive motor to limit the upward movement of said inner post.15. The delimiter of claim 12 wherein the inner post has a top and further wherein said top of said inner post is below the ground surface when said inner post is in a lowered storage position.16. The delimiter of claim 12 wherein the means for shearing said inner post comprise a plurality of perforations formed about said inner post.17. The delimiter of claim 12 wherein the means for shearing said inner post are above ground when said inner post is in a raised operating position.