초록 ▼

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

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 rotation in bearings mounted in the frame members. The shaft may be symmetrically located in order to impart uniform vibrations to the two screed plates, or may be offset in order to self-propel the concrete screed.

대표청구항 ▼

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 fram

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 said frame member to said screed plates and maintaining said screed plates in spaced apart relationship, and b. a plurality of side braces extending between said frame members, each side brace extending between the base of one said frame member and the apex of the next adjacent frame member.