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Патент USA US3060742

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Oct. 30, 1962
s. E. 'coRRY
3,060,732
DERRICK MAST WITH LOAD CHECKING MECHANISM
Filed 001;. a, 1958 _
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Oct. 30, 1962
s. E. coRRY
3,060,732
DERRICK MAST WITH LOAD CHECK-ING MECHANISM
Filed Oct. 5, 1958
2 Sheets-Sheet 2
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3,060,732
DERRICK MAST WITH LOAD CHECKING
MECHANISM
Stuart E. Corry, 4605 S. Evanston, Tulsa, Okla.
Filed Oct. 3, 1958, Ser. No. 765,080
7 Claims. (Cl. 73--141)
3,060,732
Patented Oct. 30, 1962
FIGURE 4 is an enlarged fragmentary horizontal sec
tional view taken substantially upon the plane indicated
by the broken section line 4--4 of FIGURE 2 and shows
the construction of an intermediate part of the inter
mediate member including the provision of a cylinder and
piston for calibrating the gauge connected thereto;
FIGURE 5 is a top plan view of a simpli?ed alternative
This invention relates in general to new and useful
second form of derrick mast base;
‘FIGURE 6 is an enlarged fragmentary vertical sec
improvements in derrick mast construction, and more
speci?cally to a derrick mast base construction.
10 tional view taken substantially upon the plane indicated by
the section line 6—-6 of FIGURE 5 and shows the spe
Like all other equipment, derricks have their safe load
ci?c details of the construction of the derrick mast base
limitations. While an experienced operator can gauge
the load being imposed upon a derrick mast, each indi
of FIGURE 5;
FIGURE 7 is a top plan view of a still further slightly
have become overloaded and thus damaged. It is there 15 modi?ed third form of derrick ‘mast base and shows the
fore the primary object of this invention to provide an
details thereof;
vidual can err with the result that at times derrick masts
FIGURE 8 is an enlarged fragmentary vertical section
al view taken substantially upon the plane indicated by
improved derrick mast base of the type which is provided
with a load indicating mechanism whereby the operator
the section line 8-8 of FIGURE 7 and shows the spe
ci?c details of the derrick mast base; and
FIGURE 9 is an enlarged fragmentary vertical sec
of a derrick may, upon checking, determine the load im
posed upon the mast thereof.
Another problem which frequently occurs in derrick
operation is that either the derrick base shifts due to a
settlement of the foundation, or due to the guy wires be
tional detail view taken substantially upon the plane in
dicated by the section line 9-9 of FIGURE 7 and
shows the manner in which the base member and the mast
coming slack.
It is therefore another object of this invention to pro 25 supporting members are locked together.
Referring now to the drawings in ‘detail, it will be seen
vide an improved base for derrick masts, the base being
that there is illustrated in ‘FIGURES 5 and 6 an extremely
so constructed that any shifting of the base or any chang
simple form of the present invention, the derrick mast
ing of the tension in the guy wires may be readily de
base of these ?gures being referred to in general by the
tected.
Still another object of this invention is to provide an 30 reference numeral 10. The derrick mast base 10 includes
a base member 12 and a mast supporting member 14.
improved base for derrick masts, the base including a base
‘As is best shown in FIGURE 5, the base member 12
member and a mast supporting member, there being a
includes ‘a generally rectangular plate 16 which has ex
piston and cylinder connection between the two and a
tending upwardly therefrom a piston-like portion 18. Sur
gauge communicated with the cylinder of the piston and
cylinder connection whereby the load imposed on the 35 rounding the piston-like portion 18 vand projecting there
above is an annular ring 20 which is secured to the
mast supporting member may be readily determined.
plate 16 as by welding 22.
vA further object of this invention is to provide an im
The mast supporting member 14 includes a circular
proved base for derrick masts, the base including a lower
plate-like member in the form of a diaphragm 24. The
base member adapted to be mounted on a supporting
diaphragm 24- is secured to the upper edge of the annular
surface, an intermediate member and a mast supporting
ring 20 as by welding 26. The diaphragm 24, although it
is foamed of a relatively heavy gauge steel, is flexible un
member, there being hydraulic piston and cylinder con
nections between the intermediate member and the base
member and the mast supporting member and the inter
der the loads imposed thereupon. Projecting upwardly
from the diaphragm 24 is a support member 28 having an
tween the intermediate member and the mast supporting 45 upwardly opening socket 30 receiving the lower end of a
mast 32 of a derrick.
‘
member being of a smaller capacity and range of force
mediate member, the piston and cylinder connection be
Extending upwardly from the plate 16 adjacent one end
thereof is a pair of support brackets 34. Extending be
tween the support brackets 34 and supported thereby .is_
measurement and having a lesser cross-sectional area ex
posed to the hydraulic ?uid than the piston and. cylinder
connection between the base member and the intermedi
ate member, and there being separate gauges for each of 50 a gauge 36. The gauge 36‘ includes a suitable housing 38.
The gauge 36 also includes a ?uid line 40 which is con~
the piston and cylinder connections whereby the loads
nected to a ?uid passage 42 formed in the plate 16. The
?uid passagey42 extends into a ?uid passage 44 which
imposed upon a derrick mast and transferred to the base
from the derrick mast may be accurately determined
opens through the piston-like member 18 into the space
These together with other objects and advantages which 55 between the piston-like member 18 and the diaphragm
24,v the space being ?lled with a suitable fluid, such as
will become subsequently apparent reside in the details of
‘hydraulic ?uid, and thus de?nes a chamber 46.
construction and operation as more fully hereinafter
throughout a wide range.
In the use of the ‘derrick mast base 10, as the load
described and claimed, reference being had to the accom
on the derrick mast supporting member 14 varies, the
panying drawings forming a part hereof, wherein like
numerals refer to like parts throughout, and in which: 60 ?eXure of the diaphragm 24 will similarly vary and will
pressurize the ?uid in the chamber 46 and thus pres
FIGURE 1 is a top plan view of a preferred ?rst form
surization of the ?uid will be recorded on the gauge 36.
Referring now to FIGURES 7, 8 and 9 in particular,
it will be seen that there is illustrated another simple
FIGURE 2 is an elevational view of the derrick mast
base of FIGURE 1 and shows further the details there 65 form of derrick mast base which is referred to in gen~
eral by the reference numeral 50. The derrick mast base
of;
50 includes a base member 52 and a mast supporting mem
FIGURE 3 is an enlarged vertical transverse sectional
ber 54.
view taken substantially upon the plane indicated by the
of the derrick mast base which is the subject of this in
vention and shows the general outline thereof.
'
The base member 52 is circular in outline and includes
section line 3--3 of FIGURE 1 and shows the speci?c
details of the derrick mast base including the piston and 70 a main portion 56 the underside of which may be rough
ened as at 58 to facilitate the anchoring of the base
cylinder connections between the base member, the inter
member 52. Projecting upwardly from the plate-like por
mediate member and the mast supporting member thereof;
3,060,732
3
tion 56 is a ?xed piston 60‘. Surrounding the piston 60
is a ring 62 which projects above the piston 60.
The mast supporting member 54 has a lower portion
64 which de?nes a cylinder 66. The cylinder 66 receives
the piston 60. Disposed within the cylinder 66 is a cham
ber 68 receiving suitable ?uid, such as hydraulic ?uid.
The lower portion 64 is locked to the base member 52
4
126. The spacing between the bearing surfaces 134 and
136 is less than the travel of the piston 126 so that the
bearing surfaces 134 and 136‘ will engage and thus the load
imposed upon the mast supporting member 104 may be
directly transmitted to the intermediate member 106.
Normally the piston 126 is ?oatingly disposed in the
cylinder 118 and is supported by ?uid 138 disposed in
by means of a retaining ring 70 which is releasably held
the lower portion of the cylinder 118. 1Incidently, in or
' der to provide the desired seal between the piston 126
Also, the piston 60 is sealed with respect to 10 and the cylinder 118, the lower part of the piston is pro
in place by suitable fasteners 72, as is shown best in FIG
URE 9.
the cylinder 66 by means of a ring 74.
vided with a sealing ring 139‘. The connection between
the piston 126 and the cylinder 118 is sealed by means
upwardly projecting portion 76 having an upwardly open
of a dust seal 140. The ?uid 138 also extends down into
ing socket 78 formed therein for the reception of the
a central bore 142 formed in the cylinder 118, as is
lower end of a mast 80‘. The portion 76 is reinforced 15 best shown in FIGURE 3.
with respect to the portion 64 by means of a plurality of
Mounted on the intermediate member 106 for move
The mast supporting member 74 also includes a central
circumferentially spaced gussets 82.
> In order to facilitate the handling of the derrick mast
ment therewith is a bracket 144 which supports a pair
of gauges 1‘46 and 148. The gauge 148 is communicated
base 50, there is also provided a suitable handle 84. The
handle projects upwardly from a pair of the gussets 82,
with the interior of the cylinder 118 by means of a ?exible
?uid line 150' which is connected to the cylinder 118 by
as is best shown in FIGURE 7.
Mounted between a pair of the gussets 82 is a gauge
86. The gauge 86 has a ?tting 88 which not only is uti
means of a ?tting 152 and which is communicated with
the bore 142 by means of a transverse bore 154. This
is best shown in FIGURE 4.
lized for the mounting of the gauge 86, ‘but communi
In order that the gauge 148 may be calibrated, the
cates the gauge 86 with the chamber 68 through the ?uid 25 cylinder 118 has formed therein a second bore 156 which
passage 90.
is also communicated with the bore 142. The bore
‘From the foregoing description of the base member 52
and the mast supporting member 54, it Will be seen that
there is a piston and cylinder connection therebetween
156 is aligned with an auxiliary cylinder 158 having‘an
end cap 160. Threadedly engaged in an internally
with the cylinder having hydraulic ?uid disposed therein
threaded bore 162 through the end cap 160 is a feed
screw 164 of an auxiliary piston 166 which is disposed
and the ?uid supporting the mast supporting ‘member 54
in a ?oating relation. In order that the gauge 86‘ may be
in the auxiliary cylinder 158. By adjusting the position
calibrated, the mast supporting member 54 is provided
with an auxiliary cylinder 92 which opens into the cylin
of the auxiliary piston 166, the gauge 148 may be
calibrated.
The gauge 146 is communicated with the chamber 112
der 66. Threadedly engaged in the cylinder 92 is an aux 35 by means of ?exible ?uid line 170 which is connected
to the piston 116 by means of a ?tting 172. The ?exible
position of the auxiliary piston 94 in the auxiliary cylinder
?uid line 170 is communicated with the interior of the
92, the gauge 86 may be suitably calibrated.
chamber 112 by means of a bore 174 through the
Referring now to FIGURES 1 through 4, inclusive, it
piston 116.
will be seen that there is illustrated a preferred form of 40
Also carried by the piston 116 is an auxiliary cylinder
the invention, the derrick mast base of these ?gures being
176. The cylinder 176 is communicated with the cyl
referred to in ‘general by the reference numeral 100‘. The
inder 112 by means of a bore 178 through the piston
derrick mast base 100 includes a base member, which
116. The auxiliary cylinder 176 has the opposite end
is referred to in general by the reference numeral 102
thereof closed by an end cap 180 which is provided with
and ‘a mast supporting member which is referred to in 45 a centrally disposed internally threaded bore 182 passing
general by the reference numeral 104. Disposed inter
therethrough. Threadedly engaged in the bore 182 is a
mediate the base member 102 and the mast supporting
threaded stem 184 of an auxiliary piston 186. By adjust
member 104 is an intermediate member 106.
ing the position of the auxiliary piston 186 within the
The base member 102 includes a bottom plate 108
auxiliary cylinder 176, the gauge 146 may be calibrated.
which is circular in outline. Extending upwardly from the 50
At this time it is pointed out that the cylinder 118 is
bottom plate 108 is a ring 110 which de?nes a cylindrical
reinforced relative to the piston 116 by providing the
chamber 112. In order to facilitate the handling of the
intermediate member 106 with a plurality of gussets 188.
derrick mast base 100‘, the plate 108 has secured thereto
The gussets 188 extend ‘between the piston 116 and the
in diametrically opposite relation suitable handles 114.
cylinder 118, as is best shown in FIGURES 1 and 2.
The intermediate member 106' includes a lower por 55 Also, as is best shown in FIGURE 1, the gauges 146
tion in the form of a piston 116 and an upper portion in
and 148 are provided with extra hands 190. Each of
the form of a cylinder 118. The piston 116 is received
the hands 190 has connected thereto a set device 192
in the cylindrical chamber 112 and is sealed thereto by
whereby the hand 190 of each of the gauges 146 and
means of a sealing ring 120. The piston 116 is retained in
148 may be set to a predetermined desired load indicat
the chamber 112 by means of the retaining ring 122 which 60 ing condition. Thus any movement of the gauges 146
is removably secured in place by means of circumferen
and 148 will be readily viewable.
tially spaced fasteners 124.
It is well known that any change in position of the
The mast supporting member 104 includes a lower por
base of the mast or any change in the tension of the guy
tion in the form of a piston 126. The piston 126 is dis
wires of the mast will result in a change in the load
posed within the cylinder 118. The upper portion of the 65 exerted on the base. Thus, by determining the load
mast supporting member 104 is referred to by the refer
imposed on the base through the gauges described herein
iliary piston 94 in the form of a screw. By Varying the
ence numeral 128 and has formed therein an upwardly
before, it will be readily apparent that any change in
opening socket 130 in which the lower end of the derrick
the derrick condition may be readily observed. Fur
mast 131 may be positioned.
thermore, inasmuch as the gauges are calibrated to give
The cylinder 118 terminates at its upper end in a later 70 a direct reading of the loads imposed upon the base, it
ally enlarged upper portion 132. The enlarged upper por
will be readily apparent that the derrick mast bases,
tion 132 de?nes an upper bearing surface 134. The bear
which are the subject of this invention, may be readily
ing surface 134 opposes a bearing surface 136 disposed
determined. Actual tests have indicated that a single
along the underside of the upper portion 128, the upper
gauge is not suf?ciently sensitive to re?ect the informa
portion 128 being of a larger diameter than the piston 75 tion needed at ‘all degrees of stress and pressure. Accord
3,060,732
5
ingly, two separate but coordinated gauges have been
6
said intermediate member and said mast supporting mem
provided. When the gauge 148 approaches its capacity,
ber in ?oating relation, said second piston and cylinder
the gauge 146 takes over and ‘begins to function. Tests
have also shown that in this manner su?icient informa
tion can be quickly obtained to ensure full protection for
the operator at all times. The device has been found
and cylinder connections having different cross-sectional
particularly useful for indicating the sinking of a founda
connection being of a lesser capacity than said ?rst piston
and cylinder connection, said ?rst and second piston
areas exposed to the liquid therein and measure different
ranges of forces, and gauges connected to each of said
cylinders for indicating the load on each of said piston
tion on which it is mounted or the slackening of the mast
and cylinder connections, an auxiliary cylinder opening
guy lines. In 'view of this construction, the overloading
of a derrick may be readily prevented. It will be noted 10 into each of said cylinders, an auxiliary piston disposed
within each of said auxiliary cylinders, said auxiliary
from FIGURE 3 that the pistons 116 and 126 and their
pistons 'being calibrating pistons, and means adjustably
associated cylinders have different cross-sectional areas
mounting said auxiliary pistons.
exposed to the hydraulic ?uid and thus will measure
4. A derrick mast base comprising a base member
different ranges of forces.
The ‘foregoing is considered as illustrative only of 15 adapted to be seated on a supporting surface, a mast
supporting member, an intermediate member disposed
the principles of the invention. Further, since numerous
between said base member and said mast supporting
modi?cations and changes will readily occur to those
member, a ?rst piston and cylinder connection between
skilled in the art, it is not desired to limit the invention
said intermediate member and said base member, a
to the exact construction and operation shown and
described, and accordingly, all suitable modi?cations and 20 second piston and cylinder connection between said mast
supporting member and said intermediate member, liquid
equivalents may be resorted to, falling within the scope
disposed in each of said cylinders and supporting both
of the invention as claimed.
said intermediate member and said mast supporting mem
What is claimed as new is as follows:
ber in ?oating relation, said second piston and cylinder
‘1. A derrick mast base comprising a base member
connection being of a lesser capacity than the ?rst piston
adapted to be seated on a supporting surface, a mast
and cylinder connection, said ?rst and second piston
supporting member, an intermediate member disposed
and cylinder connections having different cross-sectional
between said base member and said mast supporting
areas exposed to the liquid therein and measure different
member, a ?rst piston and cylinder connection between
ranges of forces, and gauges connected to each of said
said intermediate member and said base member, a
second piston and cylinder connection between said mast 30 cylinders for indicating the load on each of said piston
and cylinder connections, opposed bearing surfaces on
supporting member and said intermediate member, liquid
said mast supporting members and said intermediate
disposed in each of said cylinders and supporting both
member, said bearing surfaces being spacai apart a dis
said intermediate member and said mast supporting mem
tance less than the travel of the piston of said second
ber in ?oating relation, said second piston and cylinder
connection being of a lesser capacity than said ?rst piston 35 piston and cylinder connection whereby the load imposed
areas exposed to the liquid therein and measure di?'ferent
ranges of forces, and gauges connected to each of said
on said mast supporting member may be directly trans
ferred to said intermediate member.
5. A derrick mast base including a base member, a
cylinder on said base member having a ?uid therein, a
said intermediate member and said mast supporting mem
wherein said gauges are coordinated whereby the ?rst
and cylinder connection, said ?rst and second piston‘
and cylinder connections having different cross-sectional
cylinders for indicating the load on each of said piston 40 piston operable in the cylinder and ?oatingly supported
by the ?uid therein, a ?uid pressure gauge connected to
and cylinder connections.
the cylinder, a relatively small cylinder mounted on the
2. A derrick mast base comprising a base member
piston and having a ?uid therein, a piston operable in
adapted to be seated on a supporting surface, a mast
the second named cylinder and ?oatingly supported by
supporting member, an intermediate member disposed
between said base member and said mast supporting 45 the ?uid therein, a ?uid pressure gauge connected to said
second named cylinder, and means for mounting a mast
member, a ?rst piston and cylinder connection between
on said second named piston, said pistons in said ?rst
said intermediate member and said base member, a
and second named cylinders being of different cross
second piston and cylinder connection between said mast
sectional areas and measuring diiferent ranges of forces.
supporting member and said intermediate member, liquid
6. A derrick mast base in accordance with claim 5,
disposed in each of said cylinders and supporting both 50
named gauge will begin to function as the second named
ber in ?oating relation, said second piston and cylinder
gauge approaches the limit of its capacity.
connection being of a lesser capacity than said ?rst piston
7. A derrick mast base in accordance with claim 6,
and cylinder connection, said ?rst and second piston 55
wherein said means includes a rounded, upstanding socket
and cylinder connections having different cross-sectional
areas exposed to the liquid therein and measure diiferent
ranges of forces, and gauges connected to each of said
cylinders for indicating the load on each of said piston
and cylinder connections, said intermediate member hav
ing two opposite end portions, one of said end portions
being in the form of a cylinder, the other of said end
portions being in the :form of a piston.
13. A derrick mast base comprising a base member
adapted to be seated on a supporting surface, a mast 65
supporting member, an intermediate member disposed
between said base member and said mast supporting
member, a ?rst piston and cylinder connection between
said intermediate member and said base member, a
second piston and cylinder connection between said mast 70
on the second named piston for receiving the mast for
universal swinging and rotary movement.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,183,646
1,354,447
1,772,188
1,828,022
2,487,595
2,503,698
2,551,178
2,909,367
1916
1920
1930
1931
1949
1950
1951
1959
FOREIGN PATENTS
supporting member and said intermediate member, liquid
disposed in each of said cylinders and supporting both
Hughes ____________ __ May 16,
Troll ______________ __ Sept. 28,
Mason ______________ __ Aug. 5,
Brand _____________ __ Oct. 20,
Ruge _______________ __ Nov. 8,
Williams ____________ __ Apr. 11,
Southerland __________ __ May 1,
Goehrig et a1. ________ __ Oct. 20,
563,769
Great Britain ________ __ Aug. 29, 1944
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