close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3085282

код для вставки
April 16, 1963
E. G. WEICHSELBAUM
3‚035‚272
TEST TUBE BRUSHES
Filed March 13, 1961
6
INVEN TOR.
EDWIN G. WEICHSELBAUM
AT TO RNEY
3,685‚272
Patenied Apr. 16, 1963
2
resides in the novel features of form, construction, arrange
men's, and combination of parts presently described and
pointed out in the claims.
3‚085,272
Edwin G. Weichselbaum, Florissant, Mo., assignor, by
TEST TUBE BRUSHES
In the drawings (one sheet):
mesne assignments, to Brunswick Corporation, Chi
cago, Ill.‚ a corpora?on of Delaware
Filed Max‘. 13, 1961, Sex‘. N0. 95,321
6 Claims. (C1. 15-164)
constructed in accordance with and embodying the pres
ent invention;
FIGS. 2, 3, and 4, are sectional views taken along =lines
This invention relates to certain new and useful im
2-2‚ 3—3‚ and 4—-4, respectively, of FIG. l;
FIG. 1 is a front elevational view of a test tube brush
provements in cleaning implements for the interior of 10
laboratory glassware and, more particularly, t0 a test
tube brush.
F01‘ many years, the only type of cleariing implement
available for cleaning the insides of test tubes, and sirnilar
types of laboratory glassware, has been a brush consisting
of a lang twisted wire handle having a plurality of diam—
etrally projecting tufts of hair-bristles for a substan'tial
FIG. 5 is a fragmentary freut elevational view of a
modi?ed form of a test tube brush constructed in acoord
ance With and embodying the present invention; and
FIG. 6 is a transverse sectional view taken along line
6——6 of FIG. 5.
Referring now in more detail and by reference char
acters to the drawings which illustrate practical embodi
ments of the present invention, A designates a test tube
brush which is moulded or otherwise suitably forrned as
portion of its length adjacent one end. Such brushes,
a unitary or “one-piece” structure, ~frorn a synthetic resin,
however, have never been capable of scrubbing free any
thing but the most super?cial stains and adherent solid 20 such as polyethylene, polypropylene, polyvinyl acetate or
similar resilient ru-bber-like material, and comprises an
materials frorn the interior sunfaces of a test tube or other
elongated rod-like handle 1 provided along its length with
piece of laboratory glassware. In fact, it has been com
a plurality of uniformly spaced axial corrugations or
mon practice to clean laboratory -glassware by the use of a
beads 2. At its distal and, the handle 1 is integrally
dichromate cleaning solution, or some other rather strong
t:orrosive detergent which is -p0ured into the piece of 25 provicled with an enlarged knob 3 having a diametrally ex
tending aperture 4 by which the test tube brush A may be
laboratory glassware and -allowed to remain for a period of
hung from a suitable pin 01' hook in the usual manner.
time, after which the cleaning solution is poured back into
At its proxirnal end, the handle 1 is -slightly reduced in
the original container for re-use =until its strength is greatly
cross-sectional size to form a stem-portion 5 which is
diminished or exhausted. The piece of laboratory glass
ware which has thus been soaked is then rinsed out and 30 integrally provided around its periphery with a plurality
of axially extending series cf: radially projecting tines 6
?nally cleaned With a conventional test tube brush. Not
and a pair of diametrally opposed Soli-d ?at blade ment
only is this procedure a very time consuming and costly
bers 7 which extend axially along the stem 5 and are some
one, but produces characteristic stains on the hands of
what greater in Width than the radial length of the tines
the =laboratory technician and, in many cases, does not
eifectively clean the laboratory glassware, eVen after pro 35 6, the rows of tines 6 and the blades 7 being symmetrical
ly arnanged as shown in FIG. 3.
longed periods of chemical soaking.
The two diametrally opposed blades 7 are, moreover,
Moreover, the hair-bristles of conventional test tube
slightly greater in axial length than the stem 5 and are
brushes are not particularly durable, even when used only
nnitarily connected across the bottom of the stern 5 in an
with ord-inary tap water but, when subjected to the cor
arcuate bottom web 8. Finally, the blades 7 -are preferably
rosive action of the residual quantities of so—called “clean
curved 01' rounded at their upper margins in the provision
ing solutions,” the rinsing and scrubbing operations will de
of arcuate top-edges 9, all as best seen in FIG. 1.
teriorate the hair-bristles of the brush -rapidly. Come
As will be seen by reference ’to FIG. 4, the tines or
quently, a conventional test tube brush soon wears out and
scrubbing-?ngers 6 in each axial row are uniforrnly spaced
must be discarded. Another dif?culty with conventional
test tube brushes is the -fact that the bristles near the end
becorne worn er at least deformed very early in the
45 along the length of the stem 5 so as to exert individual
bristle-like cleansing action against the interior surface
of the test tube or other pisse of laboratory glassware be
ing scrubbed. However, each individual tine or scrubbing
ducing scarring and scratching which seriously impairs 50 ?nger 6 is integrally joined to the stem 5 and is in itself
su?iciently ?exible so that it is not reaclily pulled loose, de
the test tube itself. In fact, for many laboratory tech
forrned, or otherwi-se impaired during use.
niques wherein visual inspection of the contents is neces
The test tube brush A, being made of resilient material,
sary, a test tube which has been washed several times
1ife of the test tube brush, thereby exposing the wire
end which rubs against the bottom of the test tube pro—
w‘ith a conventional test tube brush Will becorne so
seriously scarrecl as to be rendered virtually useless.
It is‚ therefore, the prima1‘y object cf the present in
vention to provide a test tube brush which is extremely
durable, easily sterilized, and can be produced at relatively
:rnay be rea-dily inserted into a test tube or into the
narrowed neck of some other piece of laboratory glass
ware, and both rotated and reciprocated therein to achieve
a highly e?icient cleansing action. Inasmuch as the test
tube brush A is made of a water-resistant and chemical
resistant synthetic resin, it will not readily becorne water
lt is another object of the present invention to provide a 60 logged= and Will not deteriorate in the presence of cor
rosive cleaning agents. In fact, the test tube brush A has
test tube brush of the type stated which is forrned as a
been found, as a matter of actual practice, to be so ef?‚
single unitary or “one-piece” structure which is streng
cient in its mechanical cleaning action that streng or sor
and possesses extremely ef?cient scrubbing properties.
rosive chemical cleaning solutions becomes unnecessary in
It is a further object of the present invention to provide
most
cases.
a test tube brush having a uniquely arranged combination
It is also possible to provide a modi?ed forrn of test
cf radial scrubbing ?ngers and intermediate scraping
tube brush A’, as shown in FIG. 5 which also cornprises
blades formed of a resilient materia.l so that the device
an elongated rod-like handle ‘1’ having axial corruga
will readily accommodate itself to the contours of the
tions or ribs 2' and a knob ‘3', substantizdly similar to‚
surface being cleaned and may be conveniently inserted into
but somewhat larger in size than the previously described
and removed -from laboratory vessels of various types and 70 test tube brush A. The form of test tube brush A’
10W cost.
shapes.
With the above and other objects in view, my invention
is designed for use with large sized laboratory glassware
3
4
and particularly test tubes of large internal diametral size.
Accordingly, the handle 1' is iutegrally provided at its
proximal end With a diametrally enlarged head-mernber
stantially equidistant from the longitudinal center-linc
of the stem portion, and a pair of diametrally opposed
radial blades interposed between equal groups of rows,
said blades being radially wider at all points along its
axial length than the radial length of the adjacent groups
of tines and being sightly Qgreater in axial length than the
Stern, said bladcs also being unitarily connected acrcss
10 which is internally cored out from the bottom in sub
s’tantially tubular form and is integrally provided upon its
external surface with a plurality of rows cf tines or scrub
bing-?ngers 6' and radially projecting_ diametrally op
poscd blades 7' substantially similar to the previously de
the bottom of the stem in an arcuate bottorn web which
scribed tines or scrubbing-?ngers 6 and blades 7. Thc
is curved upwardly at its outer margins.
blades 7', however, are not quite as long in axial dimen 10
4. A cleaning implement formed as a. unitary one-piece
sion as the ‚head-member 10, but are rounded off at the
upper and lower corner-margins as at 9’. It will, cf
course, be understood that the tines or scrubbing-?ngers
6’ and blades 7’ are slightly heavier in croSs-section than
the previously described tines or scrubbing-?ngers 6 and
blades 7, inasmuch as the test tube brush A’ is intended for
use with larger test tubes and other laboratory vessels.
It should be understood that changes and modi?cations
struct=ure frorn a synthetic resin of sornewhat rubber-like
resilient consistency, said structure integrally cornprising
an elongated rod-like handle provided at one end with an
axially extending downwardly opening tubular Stern por
tion, a plurality of rows of radially projecting tines formed
integrally upon the outer face of the stern, said rows be
ing arranged symmetrically around the Stern, the tines in
each row being axially spaced in such a manner that each
tine in one row is co-planar with a corresponding tine
in the form, construction, arrangement, and cornbination
of the several parts of the test tube brushes rnay be made 20 in each of the other rows thereby forrning a circularly
and substituted for those herein shown and described
arranged group» ‘of tines, the tines in each such group
without departing frorn the nature and principle of rny
being of substantially the same radial length so that their
invention.
outer ends are substantially eq-uidistant frorn the longi
Having thus described my invention, what I claim and
tudinal center-line of the stem portion, and a pair 0f di
desire to secure by Letters Patent is:
25 ametrically opposed radial blades interposed between
1. A cleaning implement formed as a unitary one-piece
structure from a synthetic resin of somewhat rubber-like
resilient consistency, said structure integrally cornprising ‚
an elognated rod-like handle provided at ont end with an
axially extending stem Portion, a plurality of rows of 30
radially projecting tines formed integrally upon the outer
face of the stern, said rows being arranged symmetrically
around the stem, the tines in each row being axially
spaced in such a manner that each tine in one row is co
equal groups of rows, said blades being radially wider
at all points along its axial length than the radial length
of the adjacent groups of tines and being slightly greater
in axial length than the ster’n.
5. A cleaning implement forrned as a unitary one-piece
structure from a synthetic resin of sornewhat rubber-like
resilient consistency, said structure integrally cornprising
an elongated rod-like handle provided at one end with
an aXially extending stern portion, a plurality of rows
planar With a corresponding tine in each of the other 35 of radially projecting tines forrned integrally from the
rowsthereby forrning a circularly arranged. group of tines,
outer fade of the stem, said rows being arranged sym
the tines in each such group being of substantially the
metrically around the steril, the tines in each row being
same radial length so that their outerends are substantial
axially spaced in such a rnanner that each tine in one row
1y equidistant from the longitudinal center-line of the
is co-planar with a corresponding tine in each of the other
stem portion, and a pair of diametrally dpposed radial 40 rows thereby forrning a circularly arranged group cf tines,
blades interposed between equal groups of rows», said
the tines in each such group beirig of substantially the
hlades being radially wider at all points along its axial
same radial length so that their outer ends are substan
length than the radial length 0f the adjace'n't groups of
tially equidistant from the longitudinal center-line of the
tines.
stem portiou, and a pair of diametrally opposed radial
2. A cleanii1g implement forr'ned‘as a unitary one‘piece
blades interposed between equal groups of rows, said
structure frorn a syn?lctic resin of sornewhat rubber-like 45 blades being radially wider at all points along its axial
'resilie'nt consistency, said str’ucture integrally cornprising
length than the radial length of the adjacent groups cf
an elongated rod-like'handle provided at one end with an
tines
and being slightly greater in axial length than the
axi_ally taxtending stem ‚portion, a plurality of rows of
stem, said blades also being unitarily connected across
radially 'projecting tines formed integrally upon the outer
the bottom of the stem in an arcuate botto'rn web which
face of the stern, said rows being arranged syrnrn‘etrically 50 is ’curved upwardly at its outer margins, said blades being
around the’ stem, the tines in each row being axially spaccd
provided with arcuate top edges which merge into said
in such a manner that each tine in one row is co-planar
‘with a corresponding tine in each of the other r‘ows there
stern.
6. A cleaning implement forrned asa Unitary one-piece
by forrning a circularly arranged group of tines, the tines
~stnucture
from a synthetic resin of sornewhat rubber-like
in each such group being of substantially the sinne radial 55 resilient consistency, said structure integrally comprising
length so that their oute’r ends are subst'antially equidis
tant frorn the longitudinal center-lin'e of the stern portion,
an elongated rod-like handle provided at one end with an
axially extmding stem portion, a pair of diametrally op
and a pair of diarnerally opposed radial blades interposed
1)osed radial blades integrally formed with said stem and
between equal groups of rows, said blades beingr'eidially
outwardly therefrom, each of said blades hav
wider at all points along its axial length than the radial 60 extending
ing
a
pair
of opposed ?at faces, a plurali‘ty of rows of
length of the adjacent groups of tines and being slightly
radially
projecting
tines formed on the outer face of
greater in axial length th'an the Stern.
said stern and being annularly spaced between the ?at
3. A cleaning implement fortned as a‘unitairy oneqaiece
structure frorn a synthetic resin of somewhat rubber-like
resilient consistency, said structure integrally cornjarising
an elon}gated rod-like handle, provided at one end with
an axially extending stem portion, a plurality of rows
of radially projecting tines formed integrally upon the
face of one blade and the ?at face of the other blade, said
65 stem also being provided with a plurälity of rows of radi
ally projecting tines formed on the outer face cf said
stem and being annularly spaced between the other ?at
surfac'es of each of said blades, the tines in each row
being axially spaced in such a manner that each tine in
outer face of the stcm, said rows being arranged sym
metrically around the stem, the tines in each row being 70 one row is eo-planar With a corresponding tine in each
of the other rows thereby forrning a circularly arranged
axially spaced in such a manner that each tine in one row
is co-planar with a corresponding tine in each of the
group of tines, the tines in each such group being of sub
othef rows thereby forming a circularly arranged group
stantially the‘same radial length so that their outer ends
of tines, the tines in each such group being of substantially
are substantially equidistant from the longitudinal eenter
the same radial length so that their outer ends are sub«
1ine cf the stem portion, said blades being radially wider
6
5
Dorsch _______________ -- Feb. 20,
Kuhnel ______________ __ Dec. 11,
Fabrey _____________ __ Aug. 25,
Volcköning __________ __ Oct. 14,
1917
1934
1936
1941
Yden ______________ __ Nov. 23, 1943
Hooban _____________ __ Dec. 11, 1951
at all points along its axial length than the radial 1ength
of the adjacent groups of tines and being slight1y greater
in axial length than the stem, said blades also being uni
tarily connected across the bottom of the stem in an arcu
ate bottom web which is curved upwardly at its outer 5
margins.
Tupper .............. __ Apr. 1, 1958
Lundeen .............. __ Oct. 27, 1959
References Cited in the ?le of this patent
UNITED STATES PATENTS
405,297
Bailey ______________ __ Inne 1s‚ 1889 1°
FOREIGN PATENTS
290,515
Great Britain ......... -- May 17, 1928
Документ
Категория
Без категории
Просмотров
0
Размер файла
491 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа