|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||H02G-003/08 H02G-003/18 B65D-006/40 B65D-006/00|
|미국특허분류(USC)||220/003.2; 174/666; 220/254.2; 220/266; 220/277; 220/284; 220/661|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 11 인용 특허 : 34|
A knockout in a sidewall of a plastic electrical box has a slot for receiving a screwdriver tip to apply a knockout force to the knockout. The slot is located adjacent the box bottom wall to minimize deformation of the sidewall by a knockout force.
We claim: 1. An electrical outlet box of plastic material, said box having a plurality of walls, at least one knockout arrangement in at least one of said walls, said knockout arrangement comprising inner, intermediate and outer generally circular grooves in said wall circumscribing inner, intermediate and outer knockouts, each knockout having a slot therein adjacent its circumscribing groove for receiving a tip of a flat bladed screwdriver to apply a force to a knockout and separate same from the one wall, said knockout arrangement being positioned and...