U.S. patent number 3,906,573 [Application Number 05/377,414] was granted by the patent office on 1975-09-23 for oscillating power paint brush.
Invention is credited to John W. Crawford.
United States Patent |
3,906,573 |
Crawford |
September 23, 1975 |
Oscillating power paint brush
Abstract
An oscillating power paint brush having a pneumatic drive for
oscillating the brush and fountain paint feed to the brush
controlled by air pressure and a hand actuated variable valve. The
brush is connected to the source of pneumatic power by flexible
tubes so that the brush can be used at any point adjacent the power
apparatus.
Inventors: |
Crawford; John W. (Los Angeles,
CA) |
Family
ID: |
23489010 |
Appl.
No.: |
05/377,414 |
Filed: |
July 9, 1973 |
Current U.S.
Class: |
15/22.1;
401/188R |
Current CPC
Class: |
B05C
17/002 (20130101); A46B 11/063 (20130101); A46B
2200/202 (20130101) |
Current International
Class: |
A46B
11/00 (20060101); A46B 11/06 (20060101); B05C
17/00 (20060101); A46b 013/04 () |
Field of
Search: |
;15/22R,22A,22C,98R,5R
;118/207,241,242,256 ;401/188,197,204 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
730,840 |
|
Mar 1966 |
|
CA |
|
1,055,501 |
|
Jan 1967 |
|
GB |
|
1,130,499 |
|
Oct 1956 |
|
FR |
|
Primary Examiner: Blum; Daniel
Attorney, Agent or Firm: Victor J. Evans & Co.
Claims
What is claimed is:
1. An oscillating power actuated paint brush compising a paint
brush body including a handle, a source of air under pressure an
elongated shank mounted for oscillation about its longitudinal axis
in said body, a plurality of bristles mounted endwise in said
shank, means feeding paint under pressure to said bristles, valve
plate means transversely thereof and positioned entirely within
said body but for their extremities so that the bristles oscillate
back and forth as the shank oscillates in said body for controlling
the flow of paint from said last named means to said bristles, and
power actuated means driven by said air under pressure for
oscillating said shank to oscillate said bristles.
2. A device as claimed in claim 1 wherein the power means for
actuating said shank includes an air actuated turbine and means
connecting said turbine to said shank.
3. A device as claimed in claim 1 wherein said valve plate includes
a plurality of triangular valve openings for adjusting the flow of
paint to said bristles.
4. A device as claimed in claim 1 wherein conduit means connected
between the source of air pressure and the power actuating means
are provided for oscillating said shank and additional conduit
means connected to the source of air pressure are provided for
forcing paint to said oscillating paint brush.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to power actuated oscillating paint
brushes.
2. Summary of the Invention
The paint brush of the present invention is oscillated by pneumatic
power and is simultaneously fountain feed with paint under air
pressure through a hand controlled valve to control the flow of
paint to the brush.
The primary object of the invention is to provide a power actuated
oscillating paint brush with a fountain power paint feed to the
oscillating brush.
Other objects and advantages will become apparent in the following
specification when considered in light of the attached
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevation of the invention;
FIG. 2 is an enlarged fragmentary side elevation of the brush;
FIG. 3 is a vertical sectional view, taken along the 3--3 of FIG.
2, looking in the direction of the arrows;
FIG. 4 is a side elevational view of the brush with the drive cover
removed;
FIG. 5 is a bottom plan view of the brush;
FIG. 6 is a transverse horizontal sectional view, taken along the
line 6--6 of FIG. 2, looking in the direction of the arrows;
FIG. 7 is an end elevation of a modified form of brush;
FIG. 8 is a side elevation of the brush illustrated in FIG. 7;
and
FIG. 9 is an enlarged fragmentary vertical sectional view of the
brush illustrated in FIG. 7.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings in detail, wherein like reference
characters indicate like parts throughout the several figures, the
reference numeral 10 indicates generally an oscillating power paint
brush apparatus constructed in accordance with the invention.
The apparatus 10 includes a power unit generally indicated at 11
and including an electric motor 12 having a power cable 13 adapted
for connection to a source of electricity. A hand control switch 14
on the motor 12 is provided for actuating the motor 12.
An air compressor 15 is coupled to the electric motor 12 through a
flexible coupling 16 as can be seen in FIG. 1. An air tank 17 is
connected through conduits 18 to the air compressor 15 and the
conduit 18 is controlled by a valve 19. A second air tank 20 is
also connected to the conduit 18 through a hand control valve 21.
The air tank 20 is connected to a paint reservoir tank 22 by a
conduit 23. A flexible conduit 24 extends from the paint reservoir
22 to the oscillating paint brush generally indicated at 25. A
flexible conduit 26 extends from the air tank 17 to the oscillating
paint brush 25.
The paint brush 25 includes a body 27 having a port 28 extending
downwardly therefrom and communicating with the flexible conduit
24. A chamber 29 communicates with the port 28. A generally
cylindrical transverse bore 30 is formed in the body 27 below the
chamber 29. A plurality of apertures or ports 31 are formed in the
bottom of the chamber 29 and communicate with the bore 30. A valve
plate 32 is slidably mounted in the body 27 in a position to
intersect the ports 31. The valve plate 32 has a plurality of
triangular apertures 33 formed therein and adapted to communicate
with the openings 31 so as to control the flow of paint from the
chamber 29 to the bore 30 as desired by the operator. A handle 34
protrudes from the body 27 through a slot 35 to permit the valve
plate 32 to be moved in the body 27 to open and close the apertures
31 as desired.
A generally cylindrical shank 36 is mounted for oscillating in the
bore 30 and has a plurality of apertures or bores 37 extending
downwardly therethrough communicating with an enlarged recess 38
formed along the upper surface of the shank 36. The recess 38 is
constantly in communication with the ports 31 whenever the valve 32
is positioned so as to open the apertures 31 to communicate with
the bores 37 so that paint may flow downwardly therefrom to a
plurality of bristle tufts 39 mounted in the shank 36.
A miniature air actuated turbine 40 is mounted in the body 27 and
has an eccentric 41 mounted thereon and connected to a link 42 as
can be seen in FIG. 4. The link 42 is connected to an arm 43
extending outwardly from the shank 36 so that rotation of the
turbine 40 will rotate the eccentric 41 and vertically oscillate
the link 42 and the arm 43 to oscillate the shank 36 in the bore
30. A cover 44 is provided for the side of the brush 25 so that
neither paint nor lubricants will escape from the body 27. The body
27 is separable along a transverse vertical line 45 and is secured
together by a plurality of screws 46.
In the use and operation of the invention the desired paint is
placed in the paint reservoir 22 and the electric cable 13 is
connected to a source of electricity. The switch 14 is thrown to on
position so as to drive the compressor 15 pressuring the air tanks
17, 20. The valve 19 can be used to control the pressure in the air
tank 17 and hence can control the speed of oscillation of the
bristle tufts 39 of the brush 25. The hand valve 21 can be adjusted
to control the pressure in the tank 20 and thus to control the
fountain flow of paint from the reservoir 22 to the bristles 29.
The valve plate 32 can be adjusted to control the final flow of
paint from the chamber 29 to the bristles 39. The paint brush is
brought adjacent a wall to be painted with the bristles 39 touching
the wall the oscillation thereof will paint so long as paint is
supplied from the reservoir 22.
In FIGS. 7, 8 and 9 a modified oscillating paint brush is
illustrated generally at 125. The paint brush 125 has a body 127
with an elongate head 150 formed transversely of the lower end
thereof so that a vastly greater number of bristles 139 may be used
when compared to the number of bristles 39 in the preferred form of
the invention. The paint brush 125 is otherwise identical to the
paint brush 25 and is provided for covering larger areas of wall
surface more rapidly than the oscillating paint brush 25.
It should be understood that while the drive for the oscillating
paint brush and the power for the fountain paint supply is
illustrated and described as being pneumatic any other desired
power may be used.
Having thus described the preferred embodiment of the invention it
should be understood that numerous structural modifications and
adaptations may be resorted to without departing from the spirit of
the invention.
* * * * *