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Патент USA US2412706

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17; 1945-
2,412,706 '
Filed June 22, 1944
2 Sheets-Sheet 1
“£41; 6.00am.
Dec. 17, 1946.
Filed June 22, 1944
2 Sheets-Sheet 2
Patented Dec. 17, 1946
Carl M. Anderson, Corsicana, Tex., assignor, by
mesne assignments, to Bethlehem Supply Com
pany, a corporation of Delaware
Application, June 22, 1944, Serial No. 541,506
7 Claims. (Cl. 188-264)
The invention relates to an air-cooled hoist,
ing drum and is particularly directed to the cool
ing of the brake ?anges on such a drum.
The invention will be described as applied to
a hoisting drum such as that used in hoisting and
lowering the equipment in the rotary method of
drilling wells, where loads approaching 200,000 to
300,000 pounds are being controlled; but it seems
obvious that it may be applied to other types of
braking devices.
When a tremendous load is being handled by
a hoist, the braking mechanism is subjected to
tremendous stresses and a great deal of heat is
This shaft 4 may have suitable sprocket wheels
5 thereon by which it is driven. A dental clutch
1 serves to connect the shaft to the other equip
ment. A hoisting drum 8 is shown as non-rotat
ably mounted on the shaft 4 and arranged to be
‘driven by a dental clutch l0 and the drive wheel
II or by a suitable sprocket.
The drum 8 is provided with the brake drums
I5 arranged at either end thereof and including
10 the brake ?anges l6. These drums, of course,
are ?xed to the hoist drum 8 and rotate there
with, and in the usual practice the. outer periph
ery 18 of these ?anges will receive a suitable
brake band 50' which is contracted to grip the
?ange and resist its rotation in obtaining the
so as to obtain as ei?cient operation of the brak
braking action.
ing mechanism as possible. Water-cooled, brakes
The ?ange l6 becomes heated during the brak
are well-known, but considerable difficulty is en
ing action, and an attachment has been provided
countered due to the fact that the water must be
in ‘order to assist in cooling the ?ange so as to
circulated, cooled, and corrosion prevented. It is 20 prevent burning of the brakes. Thisattachment
the object of the present invention to provide
is in the form of a head 20 which is circular in
for the air-cooling of the brakes of a hoisting or
form and shown as ‘having a peripheral ?ange
similar piece, of equipment.
2| which is somewhat less in outer diameter than
Another object of the invention is to direct a
is the inside surface 23 of the brake ?ange It so
?ow of air against the brake. drum and ?ange 25 as to provide an annular area or space ‘24 be
of a hoisting mechanism so as to dissipate the
tween the two concentric ?anges l6 and ‘2|.
heat, being generated due to the braking action
The head 20 has a concave end 25 which is
necessarily developed. Various expedients have
been. resorted to in attempts to dissipate such heat
so as to maintain the brakes; at av suitable tem
_ dished outwardly as seen in Fig. 1- so as to provide
a chamber 21 of considerable size insideof the
Another object of the invention is to provide 30 brake drum.
an attachment for brake drums and ?anges
It will be noted that the inner edge 29 of the
whereby the ?ange may. be cooled by a ?ow of air
cooling head 20 is spaced a distance from the
‘radial portion 30 of the hoist and the brake
Still another object of the invention is to pro
?ange. This head is‘ supported ona hub 3| ?tted
vide a head adapted for attachment to. a hoist 35 about the collar 32 so that the head may ‘remain
ing drum so as to, cool the brake ?anges thereof.
‘stationary as the shaft and the drum rotate.
Still another object of the invention is to pro
A pump 40 is driven in any desired manner
vide an air~cooling assembly for brake ?anges.
and is intended to force a stream of air through
.It is also an objectof the invention to provide
the pipe 4! to‘ the cooling attachment on the
an assembly where both air and water are used 40 right-hand end of the drum and also through the
in combination to eifect the cooling of a brake
pipe 42 to the left-hand cooling attachment.
This pump will be of a suitable capacity, but
Other and further objects of the invention will
preferably capable of discharging 2,000 or 3,000
be readily apparent when the following descrip
cubic feet of air a minute into the‘ pipe 4| and
tion is considered in connection with the accom
' 42.
The pipe 4| is connected to an extension
panying drawings, wherein:
44 forming a passage through the end portion 25
Fig. 1 is a vertical sectional view showing a
of the head 20.
hoist drum having end brake ?anges, to which
With this construction a stream of air is dis
the invention has been applied.
-_"charged into the chamber 21 and can escape
Fig. 2 shows a broken vertical sectional view 50 Zonly by ?owing radially outward until it reaches
showing one brake ?ange along with the brake
the inner surface of the brake ?ange [6, where
mechanism and a control for the flow of water to
upon it is de?ected as shown by the arrow 46 so
the brake ?ange.
as to ?ow outwardly through the annular area
. In Fig. 1 the base 2 serves to support the posts
24 to discharge into the atmosphere. In this
3 which carry hoist shaft 4 in suitable bearings.
manner the ?ange [6 will be cooled because it is
continuously subjected to the ?ow of air under
pressure which is tending to expand and absorb
heat so that a substantial cooling action is ob
In operation the pump 40 will direct a ?ow of
means to discharge a ?ow of air under pressure
passageway in cooling the brake ?ange.
2. An attachment for cooling the brakes of a
hoisting drumcomprisinga head _to_ be disposed
dissipation of the heatgeneratedx by, the braking
inside the ‘brake'?ange, and'means to introduce
action. The cooling action is thus independent
"a flow of air into said head to be directed against
having a peripheral ?ange
- spaced radially inwardly from the inner periph
ery of ‘the brake ?ange to provide an annular
Fig. 2 is an enlarged detail of the construction.
already described, except that it also shows the
brake band 50 as enclosing the outer periphery
I8 of the ?ange I6.
In this form shown in Fig.2 pipe 5| is~ar'-'
into said head to ?ow out through said annular’
air to the cooling head so as to assist in the
of the movement or use of the brake.
surface, the inner face of said head being con
caved to provide a distribution chamber, and
10, _ said ?ange, said head
outlet area for the air, and additional means to
' "feed water thru said head to ?ow against the
' brake ?ange.
3. An attachment for cooling the brakes of a
ranged so that it passes through an opening 53
in the end 25 of the head 20 and is arranged to
‘hoisting drum comprising a head to be disposed
discharge water at the point 54 ontorthe inside
inside the brake ?ange, and means to introduce
of the .brake ?ange Hi. This water in combina
a ?ow of air into said head to be directed against
tion with the air being discharged into the cool
ing head tends to cool the brake substantially 20 said ?ange, said head having a peripheral ?ange
spaced radially inwardly from the inner periph
because the air tends to vaporize the water and
ery of the brake‘ ?ange to provide an annular
absorb considerable heat in this manner. ' '
outlet area for the air, additional means to feed
‘ To retain the water against the inside of the
water thru said head to ?ow against the brake
56 may be provided and suitably positioned by 25 ?ange, and a control valve for ‘the water inlet
‘brake ?ange, a pad or layer of absorbent material >
which valve is vconnected for operation to the
This absorbent
material will tend to prevent the water from
attaching bolts or screws 57.
lever of the brake. .
serves to assist in the cooling action.
4. An attachment for cooling the brakes of a
hoisting drum comprising a, head to be disposed
draining out of the brake ?ange immediately and
It may be‘likely that the addition of water
inside the brake ?ange, and. means to introduce
‘may only be desirable during certain periods or
certain braking operations, whereas the air may
a ?ow of air into said head to be directed against
said ?ange, said head having a peripheral ?ange
spaced radially inwardly from’the inner periph
?ow continuously into’ the brake ?ange if de
In order, therefore, to control the ?ow of wa- ‘
ter as a function of the use of the brake, a valve
58 is shown in the water line 5| and this valve
is connected as at 59 to the brake lever 50 and
may be so adjusted that when the brake lever
ery of the
outlet area
water thru
?ange, and
brake ?ange to provide an annular
for the air, additional means to feed
said head to ?ow against the brake
means inside the brake ?ange to re
5. An air'cooling ‘head for hoist drum brakes
is used the valve will be opened‘ and discharged 5-40 comprising an annular ?ange, a concave head
into the ?ange. On the other hand, however.
the adjustment for controlling this valve 58 may
be set in such a manner that the water is dis—
charged'only when the brake lever moves beyond k
‘a predetermined position.
Broadly, the invention contemplates a means
and method of cooling brake-?anges'and dissi
pating the heat therefrom.
What is claimed is:
1. An air cooled brake for hoisting drums}
comprising _ a drum having an annular, brake
?ange ?xed thereto, a supporting shaft'rotatable
with said drum, a brake band engaging the outer
surfaces of said brake ?ange, a head supported
relatively rotatable on said- shaft and having a‘
peripheral ?ange substantially parallel to .the
‘said outer surfaces of said brake ?ange whereby
I an ‘annular passageway is formed ‘between the
inside ofthe said brake ?ange and its ownouter I
joining said ?ange, a hub in said 'head ‘so as to
support the head on the hoist‘ drum shaft, and
means to connect an air inlet'conduit to said
head portion.
6."An air cooling attachment for hoist druin
brakes including a member to be disposediinsi'de
the brake ?ange, a curved face thereon ‘to' direct
air against‘ the brake'?ange, and means to force
air thru said member to discharge against'th‘e
'7. An air cooling attachment for hoist drum
brakes including a member to be disposed inside
the brake ?ange, a curved face thereon to direct
air against the brake ‘?ange, and means to force -
rairt‘hru said member to discharge against the
?ange, said member being of a size to provide an
annular outlet space for air between'such? mem
ber and the inside of the brake ?ange.
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