US2454553A - Brush - Google Patents

Description

NOV. 23, 1948, R, s, E|SNER ET AL 2,454,553

ST5-12 ATTORNEYS NOV. 23, 1948.` R, s, E|sNER ET AL 2,454,553

BRUSH Filed May 51, 1947 2 Sheets-Sheet 2 ATTORNEYS Patented Nov. 23, 1948 BRUSH Robert S. Eisner, Red Bank, N. J., and Daniel Schoenholz, New York, N. Y.; lsaid Schoenholz assignor to said Eisner Application May 31, 1947, Serial No. l151,538

This invention relates to brushes for applying coating materials, such as paint, and supplied with the coating fluid under pressure from a reservoir. More particularly, the invention is concerned with a novel brush of the force feed type, which includes means for distributing the iluid to the working lengths of the bristles, such means retaining the fluid and preventing it from escaping from the sides of the brush, when the latter is used for painting vertical walls or ceilings.

Force feed brushes, such as that disclosed in Eisner Patent 2,388,605, issued November 6, 1945, perform excellently, when used for applying a coating material to an object laid at, so that the brush is held with its bristles pointing generally downwardly in use. Under such conditions, the coating uid supplied through the base to the bristles travels downwardly among the bristles to the ends and there is little tendency for the fluid to escape from the side of the body of bristles and drip on'the object being coated. If the patented brush is held horizontal in use,

or with its bristles higher than the handle, the

iluid issuing through the-base of the brush will not travel to the outer portions of the bristles but will escape laterally and the escape of the fluid in this manner is more pronounced in the case of wide flat brushes with relatively long bristles, such as are commonly used for painting flat surfaces. In such a brush, the bristles, when wet, tend to cling together in such manner as to leave a cavity in the middle of the mass of bristles and that intensities the problem of conducting the iluid to the portions of the bristles that come in contact with the surface to be coated, while preventing leakage of the uid from the sides of the brush.

In the new brush, the problems above mentioned are overcome by the provision of fluid distributing means, which lie among the bristles and discharge iluid to the bristles near their working portions. The brush includes a base having a passage, to which the iluid may be supplied under pressure, through a valve-controlled passage in the handle. The bristles are mounted at one end in the base and the passage has an outlet among the bristles. Flexible conduit means attached to the base lead from the outlet among the bristles toward the free ends of the latter and are connected to distributing means, also lying among the bristles. Such distributing means may include a chamber receiving fluid from the conduit means and having a. plurality of orices for discharging the fluid toward the 8 Claims. (Cl. 15-128) free ends of the bristles. The chamber is further provided with a porous, flexible body, such as a body of short bristles or a sponge or the like extending from the chamber to the ends of the long bristles mounted in the base, which lies among the long bristles and extends to the end thereof. Such distributing means thus discharge the fluid close to the working lengths of the long bristles and the short bristles or porous material lls up the cavity that would otherwise result from the presence of the chamber supported within the group of long bristles.

For a better understanding of the invention, reference may be had to the accompanying drawings, in which Fig. 1 is a longitudinal sectional view on the line I-I of Fig. 2 of one form of the new brush;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1;

Fig. 3 is a plan view, with parts broken away, of a modified form of the new brush; and

Fig. 4 is a plan view, with parts broken away, of another modiiied form of the brush.

The brush shown in Fig. 1 is of the wide flat type commonly used for painting fiat surfaces, such as walls or ceilings, and it includes a base I0 of suitable material, in which there is a passage Il extending lengthwise of the base. The passage has an inlet I2 through one wall of the base and two outlets I3 leading from the ends of the passage through the opposite wall. Long bristles Il are embedded at one end in the Wall of the base through which the outlets open. Flexible conduit means lie among the bristles and, in the construction illustrated, such means include two flexible tubes I5, I6 made of synthetic rubber or other oil-resistant material. The tubes are connected to the base at the outlets by -being telescoped over short lengths I1, I8 of, metal tubing which are inserted in the outlets and held in place by pins I9 threaded into the base to engage the tubing.

A thin, flat chamber 20 is attached to the outer ends of the tubes I5, I6 and it is provided with a lengthwise passage 2| and a plurality of outletorices 22 in its wall facing away from the base I0. The orices are of a small diameter,

such as about 1 mm. The coating material, such as paint, is supplied under pressure to the passage Il in the base and flows through the tubes I5, I6 to the passage 2l, in the chamber and then escapes through the orifices 22. The chamber 20 lies inwardly from the free ends of the bristles atabout the line along which the.l bristles are iiexed, when the brush is used in the normal manner, and a plurality cf short bristles 23 are embedded in the outer wall of the chamber around the orifices 22. Bristles 23 serve as distributing means and fill up the cavity among the long bristles that would be caused by the presence of the chamber and by the tendency of the long bristles to cling together when Wet.

The brush is provided with a handle 24 formed with a passage 25 and the handle is provided with a coupling member 26,v which is threaded into one end of the handle and has a passage aligned with passage 25. The outer end of the inlet I2 through the base is enlarged to receive the end of the coupling member and the base has an externally threaded flange 21 around the inlet opening. The handle is held in place against the base by a collar 28, which ls mounted -to encircle the coupling and may be threaded on flange 21. When the collar is drawn tight on the flange, it acts on a circumferential shoulder on the coupling to force the latter against a seat in the base. Preferably, a gasket 29 is interposed between the collar and the shoulder on the coupling. The handle is cut away at the end carrying the coupling member to permit access to the collar 28 and, at that end. the handle carries aligning pins 30, which are receivable into recesses in the base.

The handle is formed at its free end with a threaded section 3|, by which a length of tubing 32 may be connected to the handle. The tubing leads to a reservoir, in which the coating fluid is maintained under pressure. The flow of fluid from the reservoirv through the handle to the brush -is controlled by a valve mounted in a passage 33 through the handle. The valve includes a body 34 and a stem 35 which extends through the body and has a head 36, which may lbear against a seat formed in the body to cut off flow .through passage 31 through the body. The stem has a button 38 at its outer end and a spring 39 encircling the stem acts on the button to hold the valve normally closed. The valve body 34 is held in passage 33 between a pair of discs 40, 4| threaded into the passage.

In the use of the new brush, coating fluid supplied under pressure from the reservoir is admitted under the control of the valve in the handle to the passage I through the base of the brush and flows through tubes I5, I6 tothe passage 2l in the chamber 20. The fluid escapes through the orifices 22 among the short bristles 23 and, as these bristles are flexed with the long bristles in the ordinary use of the brush, the fluid saturates the working lengths of the long bristles and is transferred therefrom to the surface to be coated.

The distributing means thus delivers the fluid to these portions of the long bristles, by which it is to be applied to the surface, and the short bristles lll up the cavity that would otherwise be formed when the long bristles become wet. No fluid is deliveredto the lengths of the long bristles which lle adjacent the base and are flexed little, if any, during the use of the brush. The result is that there is little or no tendency of the fluid to escape laterally through the bristles of the new brush,

when the brush is held in horizontal position or with the bristles higher than the handle.

The construction shown in Fig. 1 is that used for a brush four or more inches wide and having bristles of about six inches or more in length. For narrower brushes used for painting moldings and other trim, the construction shown in Fig. 3 may be employed. The Fig. 3 brush includes a base 42 having a central passage 43 therethrough, and the base is attached to a handle 44 by means of a coupling 45 and a collar 46, as in the Fig. 1 construction. Bristles 41 are embedded in the base around the outlet from passage 43 and a length 48 of flexible tube is attached to the base in communication with passage 43 by being telescoped over a short length of metallic tubing 49 mounted within the outlet end of passage 43. At its outer end, the tube 48 is attached 'to a chamber 50 having a passage 5|, from which lead a plurality of small outlet orifices 52. Short bristles 53 are embedded in the wall of the chamber around the orifices and extend outwardly to the ends of bristles 41. The chamber lies at about the inner end of the working portions of bristles 41, that is, at about the place where bristles 41 are flexed during the use of the brush. The short bristles 53 fill the cavity within the main group of bristles that would otherwise be caused by the presence of the chamber 50, and the bristles also serve to distribute the fluid issuing from orifices 52 to all parts of the working bristles.

The brush shown in Fig. 4 is generally similar to that shown in Fig. 1, except that th bristles 23 in the Fig. 1 brush, are replaced by a member 54 of porous material, which is attached to the outer wall of chamber 55 to cover the small discharge orifices 56 from the chamber. The member 54 is preferably a piece of sponge made of synthetic rubber or other ymaterial that is oil-resistant.

In all forms of the new brush, the provision of the distributing means among the bristles does not interfere with the ordinary flexing of the bristles, because the' tubes I5, I6, and 48 are ilexible. The coating material is not discharged at the roots of the bristles as in prior constructions, but is delivered close to the portions of the bristles, by which .the material is actually applied. The short bristles 23, 53 first receive the coating material and they intermesh with the long bristles in such fashion that there is little or no free space in which the coating material can collect and from which it may escape laterally. Because of this intermeshing action, the use of the short bristles as part of rthe distributing means is preferred, although a brush in which the porous material is employed works better than prior brushes of the force feed type without distributing means.

We claim:

1. In a fountain, liquid-applying brush', the combination of a base, a body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel group, a passage through the base through which liquid may pass, said passage having an outlet within the body of bristles, an elongated chamber within said body of bristles, said chamber extending transversely of said body of bristles inwardly of the free end thereof, the chamber having a plurality of outlets ln the wall thereof toward the outer ends of said body of bristles, a relatively wide, thin body of bristles mounted at one end on the chamber abo t the outlets therefrom, the bristles of said thin b y of bristles extending parallel to and substanti y to the free ends of the bristles mounted on the base, the two bodies of bristles together constituting the liquid-applying means of th'e brush, and flexible conduit means connecting the outlet from the passage in the base to the chamber, whereby liquid passed through the passage in the base will be conducted by said flexible conduit means to the chamber and pass outwardly therefrom into the body of bristles mounted on the chamber and toward the free ends of both bodies of bristles.

2. In a fountain, liquid-applying brush, the combination of a. base, a body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel group, a passage through the base through which liquid invay pass, said passage having an outlet within the body of bristles, a. chamber within said body of bristles, the chamber having a plurality of outlets in` the wall thereof toward the outer ends of the body of bristles, a relatively wide, thin body of bristles mounted at one end on the wall of the chamber about said outlets, the last-named body of bristles generally conforming in shape to the shape of the body of bristles mounted on the base, the bristles of said thin body of bristles extending parallel to and substantially to the free ends of the bristles mounted on the base, the two bodies of bristles together constituting the liquid-applying means of the brush, and flexible conduit means connecting the outlet from the passage in the base to the chamber, whereby liquid passed through the passage in the base will be conducted by said flexible conduit means to the chamber and pass outwardly therefrom into the body of bristles attached to the chamber and toward the free ends of both bodies of bristles.

3. In a fountain, liquid-applying brush, the combination of a base, a body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel group, a passage through the base through which liquid may pass, said passage having an outlet within the body of bristles, an elongated chamber within said body of bristles, the chamber extending transversely of said body of bristles inwardly of the free end thereof, the chamber having a plurality of outlets in the wall thereof toward the outer ends of said body of bristles, a relatively wide, thin, porous, flexible body mounted on the wall of the chamber about said outlets and extending therefrom outwardly conduit means to the chamber and pass outwardly therefrom into said porous flexible body and toward the free ends of said body and the bristles.

4. In a fountain, liquid-applying brush, the combination of a base, a body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel group, a passage through the base through which liquid may pass, Said passage having a pair of outlets within said body of bristles, a chamber within said body of bristles, said chamber extending transversely of said body of bristles inwardly of the free end thereof, said chamber h'aving a plurality of outlets in the wall thereof toward the outer ends of the bristles, and a relatively wide, thin body of bristles mounted on the chamber about said outlets, the bristles of said last-named body of bristles extending parallel to and substantially to the free ends of the bristles mounted on the base, said two bodies of bristles together constituting the liquid-applying means of the brush', and a pair of flexible conduit means connecting the outlets from the passage in the base to the chamber, one adjacent each end thereof, whereby liquid passed through the passage in th'e base will be conducted through said flexible conduit means to the chamber and pass outwardly therefrom into the body of bristles attached to the chamber and toward the free ends of both bodies of bristles.

5. In a fountain, liquid-applying brush, the combination of a base, a main body of bristles mounted at one end of the base and having the bristles thereof extending from the base in a generally parallel direction, a passage in the base through which liquid may pass, said passage having an outlet within the body of bristles, a relatively wide, thin distributing brush within'said main body of bristles, the distributing brush including a base having a passage therein through which liquid may pass and a plurality of outlet orifices opening therefrom and a body of bristles mounted at one end on the'base of the distribut ing brush and generally conforming in shape to the shape of said main body of bristles, the bristles of the distributing brush extending substantially parallel to and substantially to the free ends of the bristles of said main body of bristles, said two bodies of bristles together constituting the fluidapplying means of the brush, and ilexible conduit means connected to the outlet from the passage in the first-named base and connected to the base ofthe distributing brush and the passage therein, whereby liquid passing through the passage in the first-named base will .be conducted by said flexible conduit means to the passage in the base of the distributing brush and pass outwardly therefrom into the body of bristles attached to the base of the distributing brush and toward the free ends of both bodies of bristles.

6. In a. fountain, liquid-applying brush, the combination of a base, a main body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel direction, a passage in the base through which liquid may pass, said passage having an outlet within the body of bristles, a relativelywide, thin distributing brush within said main body of bristles, the distributing brush including a base having a passage therein through which liquid may pass and a plurality of outlet orifices opening therefrom and a body of bristles mounted at one end on the base of the distributing brush and generally conforming in shape to the shape of said main body of bristles, the bristles of the distributing brush extending su-bstantially parallel to and substantially to the free ends of the bristles of said main body of bristles, said two bodies of bristles together constituting the fluid-applying means of the brush, flexible conduit means connected to the outlet from the passage in the first-named base and connected to the base of the distributing brush and the passage therein, whereby liquid passing through the passage in the first-named base will be conducted by said flexible conduit means to the passage in the base of the distributing brush and pass outwardly therefrom into the body of bristles attached to the base of the distributing brush and toward the free ends of both bodies of bristles, a handle attached to the first-named base having a. passage therethrough communicating with the passage in said base, and valve means for controlling the iiow of liquid through the passage in said handle.

7. In a fountain, liquid-applying brush, the combination of a base having a passage with an inlet thereto at one side of the base and an outlet therefrom at the other side of the base,'a body of bristles mounted at one end on the base, the bristles of said body extending outwardly and generally parallel from the side of the base having the outlet. a handle attached to the base having a passage extending therethrough communicating with said inlet, valve means for controlling the ilow of liquid through said passage, an elongated chamber within saidbody of bristles and inwardly of the free end thereof, the chamber having a plurality of outlets in the wall thereof toward the outer ends of the bristles, and a relatively wide, thin body of bristles mounted on the wall of the chamber and about the outlets therefrom, said last-named body of lbristles generally conforming in shape to the shape of the body of bristles mounted on the base, the bristles of said last-named body of bristles extending parallel to and substantially to the ends of the bristles of said first-named body of bristles, said two bodies of bristles together constituting the liquid-applying means of the brush, and a. flexible conduit attached to the base and extending from said outlet among the bristles and connected to said chamber, whereby liquid passed through the handle and the passage in the base will be conducted by said flexible conduit to said chamber and pass outwardly therefrom into the body of bristles mounted on the chamber and toward the free ends of both bodies of bristles.

8. In a fountain, liquid-applying brush, the combination of a base, a body of bristles mounted at one end on the base and having the bristles thereof extending from the base in a generally parallel group, a passage through the base through which liquid may pass, said passage having an outlet within the body of bristles, an elongated chamber within said body of bristles, the chamber extending transversely of said body of bristles inwardly of the free end thereof, the chamber having a plurality of outlets in the wall thereof toward the outer free end of said body of bristles, a, sponge mounted on the wall of the chamber about said outlets and extending therefrom outwardly toward and substantially to the end of the body of bristles, said sponge generally conforming in shape to the shape of the body\of bristles, the body of bristles and the sponge to gether constituting the liquid-applying means of the brush, and exible conduit means con,- necting the outlet from the passage in the base to the chamber, whereby liquid passed through the pipe in the base will be conducted by said eXible conduit means to the chamber and pass outwardly therefrom into the sponge and toward the free ends of the sponge and the bristles.

ROBERT S. EISNER. DANIEL SCHOENHOLZ.

e REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number- Name Date 1,342,211 Hainsey June 1, 1920 1,904,940 Beisser Apr. 18, 1933 2,041,173 Fairchild May 19, 1936 2,127,000 Mitchell Aug. 16, 1938 2,190,599 Jones Feb. 13, 1940

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