|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||220/203.21 ; 220/912 ; 116/137R ; 116/070 ; 909/344|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 4 인용 특허 : 7|
The present invention relates to a whistling device of a cooker lid and in particular, to a handle block mounted onto a cooker lid to adjust the size of an air hole on the lid and the sound produced. A steel bead or a whistle is placed in a screw cork to produce a whistling sound and the adjustment of the handle block of the cooker lid can control the volume of the sound and the amount of hot air released from a cooker.
[I claim:] [1.](a) the cooker lid is circular and has a center opening allowing the screw cork to pass through it and then fix to a screw hole of a protrusion at the bottom of the handle block, an annular rim at the bottom of the screw cork is urged against the circumference of the center opening;(b) the screw cork has a center projection having a venting hole along the projection and at the center thereof and the outer surface of the projection is threaded such that the screw cork can pass through the center opening, two air-guiding slots are provided a...