|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B28B-001/08 E01C-019/22 E01C-019/30 B06B-001/16|
|미국특허분류(USC)||425/456 ; 264/69 ; 404/118 ; 404/120|
|발명자 / 주소|
|인용정보||피인용 횟수 : 30 인용 특허 : 3|
A light-weight, portable and sturdy vibratory concrete screed which may be fabricated in modular fashion from a plurality of interconnected, separable frame units. A framework is provided, having a series of spaced, parallel unitary frame members of triangular configuration, the corners of the base of each frame member being attached to a pair of screed plates and maintaining the screed plates in spaced-apart relationship. Side braces and base braces extend between adjacent frame members for framework rigidity. An eccentric shaft is supported for rotatio...
In a vibratory concrete screed having a pair of spaced apart elongate screed plates for working concrete as the screed is moved across the concrete and having vibratory means to impart uniform vibrations to the screed plates for tamping and leveling the concrete, the improvement comprising a. a framework interconnecting said screed plates, said framework having a series of spaced, parallel, unitary frame members of triangular configuration having an integral, rigid cross support, the corners of the base of each said frame member including means attaching...