초록 ▼

A concrete screed comprising an elongate frame with a first longitudinally extending screed plate connected to a leading portion of the frame, and a second longitudinally extending screed plate connected to the frame rearwardly of the first screed plate. A plow body is mounted on the frame in close

A concrete screed comprising an elongate frame with a first longitudinally extending screed plate connected to a leading portion of the frame, and a second longitudinally extending screed plate connected to the frame rearwardly of the first screed plate. A plow body is mounted on the frame in close proximity to the first screed plate and presents discrete surface portions, comprising: (i) a first generally horizontal surface portion, extending forwardly from the vicinity of the first screed plate to a front leading edge and generally horizontally aligned with the first screed plate, and (ii) a second surface portion integrally joined to the front leading edge of the first surface portion and extending upwardly therefrom to an upper edge. Means are coupled to the frame for translating it along concrete to be screeded, whereby the first and second screed plates and plow body are brought into operative screeding engagement with the concrete. Means for maintaining longitudinal alignment of the frame during the screeding operation are also disclosed.

대표청구항 ▼

A concrete screed, comprising: (a) an elongate frame; (b) at least one screeding surface element connected to said frame; (c) first and second winching mechanisms mounted on said frame at a first end portion thereof; (d) a power source mounted on said frame and operatively coupled to said winching m

A concrete screed, comprising: (a) an elongate frame; (b) at least one screeding surface element connected to said frame; (c) first and second winching mechanisms mounted on said frame at a first end portion thereof; (d) a power source mounted on said frame and operatively coupled to said winching mechanisms to effect winching, whereby said frame may be translated in a selected direction; (e) a first cable jointed to said first winching mechanism for take-up of said first cable thereon when said first winching mechanism is actuated by said power soruce, said first cable at its free end extending forwardly of said frame at said first end portion thereof; (f) a second cable joined to said second winching mechanism for take-up of said second cable when said second winching mechanism is actuated by said power source, said second cable being rearwardly positioned and extending along the length of said frame from said second winching mechanism at said first end portion thereof to an opposite, second end portion of the frame, and at its free end extending forwardly of said frame at said second end portion thereof; (g) guide means attached to said frame at said second end portion thereof and coupled with said second cable to allow free travel of said second cable during said winching; and (h) adjustable means mounting a pulley over which said second cable travels and located rearwardly and intermediate of the length of said frame for adjustably imparting a selected tension to said second cable operative to oppose misalignment of said frame during said winching, whereby said first and second end portions of said frame are maintainable in selected alignment with one another during winching of said screed.