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Патент USA US2410343

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0a, 29, 1946.
Filed Jan.‘ 29, 1944
9/ @20
Patented Oct. 29, 1946
William S. Haivala, Kennewick, Wash.
Application January 29, 1944, Serial No. 520,308
2 Claims.
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)
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.
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
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
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