IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0759825
(2004-01-20)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
15 |
초록
▼
A fence with hollow posts and rails uses a flexible plug that is placed in insect entry path blocking position by sliding the plug into a fence rail in a direction that is perpendicular to the longitudinal axis of the plug. A friction fit between shoulders on the plug and a rib and ledge inside of t
A fence with hollow posts and rails uses a flexible plug that is placed in insect entry path blocking position by sliding the plug into a fence rail in a direction that is perpendicular to the longitudinal axis of the plug. A friction fit between shoulders on the plug and a rib and ledge inside of the rail is attained by the relative spacing of the shoulders to the spacing of the rib and ledge.
대표청구항
▼
I claim: 1. A fence comprising: a hollow post having a flat side, a generally rectangular hole in said flat side for insertion of a rail into said post; a hollow, generally rectangular rail having an open terminal end, said rail having three continuous elongated flat sides, one of said flat sides b
I claim: 1. A fence comprising: a hollow post having a flat side, a generally rectangular hole in said flat side for insertion of a rail into said post; a hollow, generally rectangular rail having an open terminal end, said rail having three continuous elongated flat sides, one of said flat sides being horizontal, the remaining two flat sides being vertical and parallel to each other, said rail having another side that defines a channel opening running the entire length of said rail, said flat sides being joined to each other at right angles so that said rail has the configuration of a three sided square with one open side that faces downwardly, each of said flat sides having an inside surface that is exposed to the atmosphere through said open side, one of the flat vertical sides having a ledge at its lower end that projects from its inside surface into said open side toward the other vertical side, said ledge having an upper surface, said one flat vertical side having a rib on its inside surface that extends toward said other vertical side, said rib having a lower surface, said upper surface of said ledge and said lower surface of said rib being parallel and spaced apart inside of said rail; said open terminal end of said rail being inserted into said hole in said post with said open side of said rail facing downwardly, said open side of said rail and said open terminal end of said rail providing a continuous atmospheric pathway to said post through said hole; and an integral resilient plug for substantially blocking said atmospheric pathway between said hole in said post and said open side of said rail, comprising: a main body portion having four sides of equal length and equal width and equal thickness, said sides being joined to each other at right angles, a plurality of shoulders of uniform thickness protruding from said main body portion, said shoulders being spaced from each other along a longitudinal axis of said main body portion, each of said shoulders having a segment that is integral with one of said four sides of said main body portion, each of said segments having a continuous upper flat surface and a continuous lower flat surface, said upper and lower flat surfaces of each segment extending perpendicularly from the sides of said main body portion in parallel planes that are perpendicular to said longitudinal axis, and an end cap having a flat inner surface integral with said main body portion that closes one end of said main body portion; and the upper flat surface of one of said segments engaging said rib inside of said rail and the lower flat surface of another of said segments engaging said ledge on the inside of said rail so as to cause a friction fit between said plug and said rail that holds said plug inside of said rail wherein said plug blocks the continuous atmospheric pathway to prevent flying insects from entering said post through said hole. 2. The fence defined in claim 1, wherein said upper surface of said ledge and said lower surface of said rib are spaced apart a predetermined distance inside of said rail, said shoulders of said plug are spaced from each at predetermined distances along the longitudinal axis of said main body portion, the predetermined distances separating said shoulders being set so that the upper flat surface of said one segment is spaced from the lower flat surface of said another segment by a distance that is slightly greater than said predetermined distance that separates said lower surface of said rib from said upper surface of said ledge, said upper flat surface of said one segment engaging said underside of said rib and said lower flat surface of said another segment engaging said upper surface of said ledge, so that said slightly greater predetermined distance separating said upper flat surface of said one segment from said lower flat surface of said another segment causes said friction fit between said plug and rail that holds said plug inside of said rail. 3. The fence defined in claim 1, wherein said shoulders are spaced from each other at substantially equal distances along said length of said main body portion. 4. The fence defined in claim 1, wherein said segments of said shoulders are joined to each other at a right angle at each of their ends so that each shoulder continuously circumscribes said main body portion. 5. The fence defined in claim 1, wherein said upper and lower flat surfaces of said segments have outer edges that terminate at the same distance from the sides of said main body portion. 6. The fence defined in claim 1, further comprising: said shoulders being spaced from each other at substantially equal distances along said length of said main body portion, said segments of said shoulders being joined to each other at a right angle at each of their ends so that each shoulder continuously circumscribes said main body portion, and said upper and lower flat surfaces of said segments have outer edges that terminate at the same distance from the sides of said main body portion. 7. The fence defined in claim 1, further comprising: said main body portion of said plug being hollow with one end closed by said end cap and an opposite end open to the atmosphere, said end cap having outer peripheral edges that extend past said main body portion beyond a distance that outer edges of said flat surfaces of said segments protrude beyond the sides of said main body portion, and said inner surface of said end cap is parallel to said parallel planes of said flat surfaces of said segments and perpendicular to said longitudinal axis of said plug. 8. The fence defined in claim 1, further comprising: said main body portion of said plug being hollow with one end closed by said end cap and an opposite end open to the atmosphere, said shoulders being spaced from each other at substantially equal distances along said longitudinal axis of said main body portion, said segments of said shoulders being joined to each other at a right angle at each of their ends so that each shoulder continuously circumscribes said main body portion, said upper and lower flat surfaces of said segments having outer edges that terminate at the same distance from the sides of said main body portion, said end cap having outer peripheral edges that extend past said main body portion beyond said distance that said outer edges of said flat surfaces of said segments terminate past the sides of said main body portion, and said inner surface of said end cap being parallel to said parallel planes of said flat surfaces of said segments. 9. The fence defined in claim 1, further comprising: the flat vertical sides of said rail each having a locator notch at the open terminal end of the rail, said open terminal end being inserted into said hole in said post until said notches prevent further insertion by engagement with said post, said rail having openings in its horizontal flat side, fence pickets extending vertically through said openings in said rail beyond said rail, and means securing said fence pickets in said rail.
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