초록 ▼

A lightweight and portable screed utilizes an extruded beam element as the principal structural element. The extruded beam element provides a mounting surface for both a handle and a gasoline engine, a housing for a vibrating shaft driven by the engine, a screed surface vibrated by the shaft and sup

A lightweight and portable screed utilizes an extruded beam element as the principal structural element. The extruded beam element provides a mounting surface for both a handle and a gasoline engine, a housing for a vibrating shaft driven by the engine, a screed surface vibrated by the shaft and support surfaces for supporting the ends of the screed on forms.

대표청구항 ▼

A concrete screed for screeding a width of concrete confined by forms comprising: (a) an elongated extruded beam characterized by: (i) extending in length for the full width of the concrete to be screeded (ii) having a first flat horizontal plate portion on the top thereof suited for mounting direct

A concrete screed for screeding a width of concrete confined by forms comprising: (a) an elongated extruded beam characterized by: (i) extending in length for the full width of the concrete to be screeded (ii) having a first flat horizontal plate portion on the top thereof suited for mounting directly thereon a selected number of handles and a vibrating shaft drive motor; (iii) having a hollow, tubular cylindrical section located below said first plate portion with the axis thereof extending parallel to said first plate portion suitable for service as a shaft housing; (iv) having a second flat horizontal plate portion on the bottom thereof below said tubular section and in a plane extending parallel to said first plate portion suitable for service as a screed and at the ends thereof for supporting said beam on forms; (v) having a first set of generally vertical ribs joining said first plate and tubular section; and (vi) having a second set of generally vertical ribs joining said tubular section and said second plate section; (b) a shaft extending for the length of and housed within the said tubular section of said beam; (c) a set of bearings mounted on said shaft and spaced at intervals along the length thereof and sized to provide a loose bearing support for said shaft within said tubular section; (d) a motor mounted on said first horizontal plate portion and secured thereto; (e) drive connection means between said motor and shaft enabling said motor to drive said shaft and impart vibrations to said second plate portion; and (f) at least one handle secured to said first plate portion for guiding said screed.