검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | E01B-003/00 |
미국특허분류(USC) | 238/084 ; 238/085 ; 238/086 ; 238/091 ; 238/310 ; 246/121 |
출원번호 | US-0690830 (1996-08-01) |
발명자 / 주소 | |
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 17 인용 특허 : 0 |
A rail tie and track-tie connection includes a molded plastic body member having molded plastic cover pieces attached to the body member, with lip portions engaging and capturing bottom flanges on the track rails. The body member may be hollow with a filler mass supporting the sides and cross bolts providing further reinforcement. A detector circuit for electronically detecting removal of a cover piece is located within the tie body member.
[ We claim:] [1.] A railroad tie track connection for two spaced railroad tracks comprising:an elongated molded plastic body member having a generally rectangular flat top;a series of three generally flat cover pieces arranged along the length of said body member overlying and fixedly attached to the top of said body member, each cover piece having a width corresponding to the width of said top of said body member, a cover piece at each end of said body member including a protruding lip portion at one end thereof extending substantially completely across...