Патент USA US2410343код для вставки
0a, 29, 1946. w. s. HAIVALA 2,410,343 CONCRETE FLOAT Filed Jan.‘ 29, 1944 301 9/ @20 MM 1.92 j/Z/% WZZQIINVENTOR. ATI'OHN EYS Patented Oct. 29, 1946 2,410,343 UNITED STATES PATENT OFFICE 2,410,343 _ . CONCRETE FLOAT William S. Haivala, Kennewick, Wash. Application January 29, 1944, Serial No. 520,308 2 Claims. 1 My invention relates to the processing of ?n ishing surfaces of concrete, and has among its objects and advantages the provision of an im proved concrete ?oat. An object of my invention is to provide a con crete ?oat having a working face so contoured as to penetrate the coarse aggregate below the troweling surface, thereby permitting the ?ne (Cl. 724136) 2 ment with the socket 30. Thus the handle 28 maybe easily disconnected from the socket for substitution of handles of different lengths. The body I2 is provided with a plurality of equally spaced cross slots 50 within which are inserted steel blades 52. All the blades 52 pro ject equal distances from the straight bottom face 54 of the body 12, and the blades are ar aggregate and more ?uid content of the concrete to ?nd its way to the surface to provide a bet 10 ranged in parallelism one with the other and with the handle 28. Welded connections 56 are ter troweling condition. provided between the blades 52 and the angles My invention also provides a troweling sur face which eliminates the necessity of excessive l8 extending along the two sides of the body I2. The ?anges I8 extending across the ends of amounts of driers or topping. This eliminates such additional costs and results in a better class 15 the body l2 are of such width as to bring their lower edges in a plane common to the bottom of work. Excessive amounts of driers frequently edges of the blades 52. All the blades 52 are cause blisters and uneven ?oors. slightly tapered, as at 58, which prevents stones In the accompanying drawing: from wedging ‘between the blades. The two por Figure 1 is a top plan view of my concrete ?oat. Figure 2 is an end View somewhat enlarged 20 tions of the ?ange I8 which function as blades are also tapered slightly on their inner faces, and partly in section, and as at 60. I Figure 3 is an enlarged fragmentary side view The ?oat is of a durable construction but is partly in section. relatively light in weight. The device may be In the embodiment of the invention selected for illustration, the ?oat I 0 comprises a wood 25 easily manipulated on the concrete, and the blades 52 cause such penetration of the large body l2 reinforced about its perimeter by an angle aggregate as to bring a su?icient body of the M. The angle is in the nature of a frame ex more ?uid aggregate to the surface to facilitate tending about the four sides of the body l2, with troweling thereof. The device may be manipu lated adjacent obstructions in that the end por bracing the edge margins of the body. - 30 tions of the ?anges l8 also function as Working blades. The several parts of the ?oat may if Bars 20 made of angle iron, extend transversely desired be cast from suitable metal or metals. across the body l2 and the frame l4 and have Without further elaboration, the foregoing will their ends welded, as at 22, to the ?anges iii of the frame. The frame Ill reinforces the body I2. 35 sofully explain my invention, that others may, by applying current knowledge, readily adapt the The bars 20 which are located at opposite sides same for use under various conditions of service. of and spaced equally from the transverse center I claim: of the body l2 and frame l4, prevent the warp_ 1. A concrete ?oat comprising a body composed ing of the body and frame. A handle 28 is detachably connected with a 40 of a rectangular metal frame having an 'open lower face, a wooden block in said frame with socket 30 mounted upon the body l2 centrally its lower face above a plane with the lower edge between the bars 24. The socket 30 is made of of the frame, said block having transverse grooves sheet metal, and it is provided with ?anges 32 in its lower face, 'blades arranged in said grooves which rest upon the body l2 and which are secured to the body by bolts 34. The socket 30 45 with their lower edges ?ush with the lower edges of the frame and their ends welded to the inner is shaped to provide side walls 36 and a top wall vertical walls of the frame, and a handle carried 38 arranged at an angle to the top face of the by the body. body I2. The handle 28 includes a tapered face 2. A concrete ?oat comprising a body com 40 which contacts with the top face of the body l2 so that the handle 28 may be ?rmly connected 50 posed of a rectangular frame composed of in verted L-shaped metal bars, a wooden block with the socket by merely driving the handle within said frame with its lower face in a plane therein. above the lower edges of the frame, said block Means for positively connecting the handle 28 the ?ange l6 of the angle overlying the top edge margins of the body l2 and the ?ange l8 em ' with the socket 30 comprises a tapered wedge having transverse ‘grooves in its lower face, blades arranged in said grooves with their lower 42 passable freely through slots 44 in the side walls 36 and through an opening 46 in the handle 55 edges ?ush with the lower edges of the frame and their ends welded to the inner vertical walls 28. This opening includes a tapered face 148 of the L-shaped bars, and a handle socket se engaged by the tapered pin 42, so that the handle cured to the wooden block and extending up 2-8 will be held ?rmly in the socket 30 when wardly through the frame. the pin 42 is driven home, since the edge of the pin opposite the angle wall 48 lies in engage 60 WILLIAM S. HAIVALA.