초록 ▼

A vibratory concrete screed composed of a plurality of interconnected sections. Each section includes a series of frame members which are located at an acute angle with respect to the longitudinal axis of the section. Each frame member is generally triangular in configuration and is composed of a ba

A vibratory concrete screed composed of a plurality of interconnected sections. Each section includes a series of frame members which are located at an acute angle with respect to the longitudinal axis of the section. Each frame member is generally triangular in configuration and is composed of a base and a pair of sides which are connected together at an apex. The ends of the bases of the frame members are connected to a pair of parallel screed plates, while a ridge tube is connected to the apices of the frame members. The ridge tubes of adjacent sections are connected together by an adjustable connecting mechanism, and axial adjustment of the ridge tubes will tend to tilt the screed plates of one section relative to the adjacent section to provide the desired crown for the screed. The central portion of the base of each frame member is provided with a tubular hub and in one embodiment, the aligned hubs receive an eccentric shaft that is operably connected to an engine to provide vibratory motion for the screed. In another form of the invention, an air supply tube is mounted within the aligned hubs, and conduits serve to supply air under pressure from the supply tube to individual pneumatic vibrators mounted along the length of the screed.

대표청구항 ▼

A vibratory screed, comprising an elongated screed section including a plurality of frame members, each frame member being generally triangular in configuration and including a base and a pair of sides that are connected together at an apex, the base of each frame member being disposed at an acute a

A vibratory screed, comprising an elongated screed section including a plurality of frame members, each frame member being generally triangular in configuration and including a base and a pair of sides that are connected together at an apex, the base of each frame member being disposed at an acute angle with respect to the longitudinal dimension of said section and each frame member being disposed at an angle to adjacent frame members, the ends of the base of each frame member being disposed in proximate relation to the ends of the bases of adjacent frame members, plate means carried by the bases of said frame members and disposed to engage and finish the upper surface of a concrete slab, a hub carried by each frame member and defining an opening with each opening disposed generally parallel to the longitudinal axis of said section, said openings disposed in axial alignment, the axis of each opening being disposed at an acute angle to the respective frame member, an elongated member disposed within said aligned openings, connecting means for connecting the upper ends of said frame members, and vibratory means operably connected to said frame members for affecting vibration of said screed section.