초록 ▼

The screed includes an elongated blade vibrated by a centrally located, eccentric weight. The blade is supported by an elongated shaft extending to a power source that drives the weight. An associated operator handle facilitates convenient manipulation of the screed. A unique vibration dispersion sy

The screed includes an elongated blade vibrated by a centrally located, eccentric weight. The blade is supported by an elongated shaft extending to a power source that drives the weight. An associated operator handle facilitates convenient manipulation of the screed. A unique vibration dispersion system enables the centrally located weight to effectively vibrate the entire blade length. The dispersion system includes an elongated, rigid integral brace extending the entire blade length. The brace secures to the eccentric weight via a vibratory housing. Vibrations from the housing force the blade to vibrate violently to consolidate the plastic concrete. As the screed is drawn across wet plastic concrete, it simultaneously consolidates the concrete by vibrating it thoroughly throughout the monolith while also striking off and levelling the top layer of the concrete. The screed includes a pivoting kickstand that enables the operator to quickly release the screed without significant departure from the present screed angle and without requiring engine shut-off. During use, the operator may deploy the kickstand and then simply drop the screed handles to engage the kickstand and thereby support the screed on both the kickstand and the blade. The entire handle assembly is preferably adjustable to accommodate operators of varying heights as well as various depths of concrete. The vibratory dispersal system includes a multiple component clamp that secures the blade to the vibratory assembly to transfer vibrations from the eccentric weight across the blade. Central portions of the brace are captivated by respective clamp sections.

대표청구항 ▼

[What is claimed is:] [1.]an elongated screed bar having a top and a spaced apart flat bottom and an exterior intermediate ramp extending therebetween, said bottom adapted to finish the concrete and said ramp adapted to strike off said concrete;a shaft with spaced apart ends, one of said spaced apar

[What is claimed is:] [1.]an elongated screed bar having a top and a spaced apart flat bottom and an exterior intermediate ramp extending therebetween, said bottom adapted to finish the concrete and said ramp adapted to strike off said concrete;a shaft with spaced apart ends, one of said spaced apart ends secured to said bar and supporting a vibrational assembly adjacent said bar and adjusted to selectively vibrate said bar, and the other of said ends remotely supporting motor means for said powering said vibrational assembly;a clamp securing said shaft to said screed bar, said clamp comprising at least three sections adapted to captivate disparate portions of said screed bar top to enable said vibrational assembly to vibrate said screed bar; andwherein said screed bar top further comprises a brace having a rectangular cross-section and extending substantially across said screed bar top, said brace having integral portions captivated by said clamp.