close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2120279

код для вставки
June 14,‘ 1938.
2,120,279
’G. O. HIERS
BOIJT ANCHOR
Filed Dec. 20, 1955
.‘
.
INVENTOR‘
.Jww
9%. 11M”
MATToRNEYs.
'
’
Patented June 14,
2,120,219
UNITED STATES PATENT OFFICE
2,120,219
‘
noL'r'‘ ANCHOR
George
Hiers, Brooklyn, N. Y., assignor to
National Lead Company, New York, N. ‘1., a
corporation of New Jersey
1
The invention
Application December 20, 1935, Serial No. 55,320
12 Claims. (Cl. 72-105)
relates to expanded lead surface of the ring and, pressing outwardly there
anchorages, the object being to improve their
holding power in relation to their size and con
sists in the application of an obturating ring to
the members constituting the anchorage as here
inbelow more fully explained.
The accompanying drawing illustrates one of
various possible forms of the invention, being the
preferred form. Fig. 1 is an axial section of the
1 O anchorage prior to caulking; Fig. 2 the same
after caulking; Fig. 3 the same anchorage modi
fled to receive the threaded end of the bolt; Fig. _
4 a detail of the obturating ring; and Fig. 5 a
perspective of the unit assembly.
15
'
The obturating ring is marked I and is applied
to the member of the anchorage that is to be
con?ned by the caulked lead in the drilled‘ hole,
that is to say, in the present case, to a hard
metal, or iron collar 2 which is placed on the bolt
on. assists in its expansion, so that it is proper to
say. in the case illustrated, that the lead acts
both directly and indirectly to produce the ex
pansion of the ring.
-
'
I
5
It is not required that the obturating ring shall
expand into actual engagement with the wall of
the drilled hole, although that is desirable. Any
reduction of the cross area of the possible es
cape path for the lead over or past the bolt en- 10
largement is found to improve the holding power.
In Fig. 3, the same members as'in Figs. 1 and 2
are modi?ed to take the threaded end of the bolt,
the bolt enlargementin this case, marked 9, be
ing internally threaded to serve as the nut for
the bolt and also chambered to provide clearance
for the bolt end.
»
The obturating ring is rendered expansible by
allowing it either to stretch or break, as the re
20 3, against its head 4. Such member, within this
invention, can be constituted of any suitable en
sult of the circumferential strain exceeding its 20
tensile limit, or it may be initially split, if de
largement fast to the bolt and adapted to be
bottomed in the drilled anchor‘ hole 5 and then
sired, or it may be furnished with a line of weak
ness on which it will part under the strain.
It is preferable in any case that its expansion re
sults in no gap or break in its circumferential g5
con?ned therein by the caulking, and it may
therefore be either a collar as shown, or a part
of the bolt-head 4 itself or it may bea nut on the
continuity through which lead under pressure .
bolt, as shown in Fig. 3, presently described.
might flow or squeeze and on this account when
the line of weakness is used it is preferably lo
The obturating ring I, is situated between the
enlargement and the mass 6 of the lead or caulk
Ci 0 ing material and is designed to be‘ expanded with
in the hole until it more or less closes the annular
cated obliquely as indicated at III in Fig. 4;
When the ring parts on this line the ends form 30
a scarfed joint which does not open up an es
crevice between the enlargement vancl the wall‘ cape for the lead. The metal of the ring is harder
of the hole. By such closure or partial closure, or less mobile than lead and its dimensions are
the relatively mobile lead under the pressure predetermined with relation to vits material so
tapered or in the form of a cone and by forcing
the ring on to it by the pressure of the lead
against- the‘ ring under the action of the caulking
that it will perform its expansion before or as the
lead begins to flow under the caulking iron thus
insuring that the crevice is promptly closed and
the lead not likely to escape even during caulk
ing. This relation is important and is brought
about by the position and shape and also the ex 40
tent of the area of the outwardly facing side of
the ring, that is exposed to the pressure of the
caulking material. The whole, or at least the
greater part of this face of the ring, is either ?at
or normal to the" direction of pressure, or dished
or otherwise shaped so as to minimize the tend
ency for the lead to flow over and around the
tool, shown in dotted lines, at ‘I. but the prin
ring's cylindrical exterior, at least until the ring
of the load on the bolt 3 is prevented from ?owing
or escaping through such crevice, with the effect
of greatly improving the holding power, improve
ments of the order of20%havingbeenconsistently
40
obtained, and with the further effect of accom
modating the anchorage to holes that have been
drilled somewhat too large, without loss of hold
ing power.
'
,
a
It is preferred to spread or expand the ob
turating ring by making the bolt enlargement 2
ciple of the invention is independent of any par I has .been driven to its maximum expansion and
ticular means of spreading the ring, whether done the crevice between ‘the bolt enlargement and 50
by the movement of the ring on a stationary cone anchor hole reduced to its minimum.
or the reverse, or in some other-way. In the
case in hand the cone 2 is provided with ?utes 8
_The ring has considerable axial dimension, at
(Fig. 5) and, in consequence, the lead under-the
least equal to its radial thickness and. desirably,
it is internally bevelled and‘ at about the same
65 caulking pressure has some access‘ to the inner
angle as the taper of the cone on which it rides.
65
.
2
2,190,279
This facilitates the expansion and keeps the ring
normal to the bolt axis during caulking and more
especially, when the bolt is under strain, it
facilitates transmission of some of the pressure
radially outward, pressing the hard metal ring
against the wall of the hole, thus enhancing the
friction which the unit as a whole has upon that
wall. The'proportions referred to give the ring
anchor hole and an expansible obturating ring ex
panded by being driven onto the enlargement and
held thereon by a body of caulking material, the
improvement which consists in said ring having
a substantially cylindrical peripheral surface OI
which is longer, axially, than the radial thick
ness of the ring and a tapered internal surface
also longer than said thickness adapted to ride on
a relatively long bearing on the cone 2 as well as
10 on the wall of the hole so that its ‘peripheral
said enlargement, the outwardly facing side of
cylindrical surface is kept at all times parallel
caulking material being substantially normal to
to the wall of the hole.
'
the ring that is exposed to the pressure of the 10
the axis of the bolt.
Desirably also, the annular members of the.
3. In anchorages of the kind comprising a
anchorage are united in some way at the time of tapered bolt enlargement to be con?ned in the
16 manufacture so that they can be packed, sold anchor hole and an expansible obturating ring
15
and handled as a unit. It is found that by form
expanded by being driven onto the enlargement
ing an annular rebate in the ring as indicated at and held thereon by a body of caulking material,
II and pressing the lead annulus ?rmly into it, a the improvement which consists in said ring hav
sufficiently secure attachment is produced be
ing its outwardly facing side arranged substan
20 tween these parts, notwithstanding that the side tially normal to the bolt axis to receive the pres 20
of the annular groove ll may flare outwardly as sure of the caulking material, and having a por
indicated in the drawing. This also aids to tion of its internal surface opposed to said en
some extent in reducing or retarding the tend
largement and accessible to said pressure of the
ency of the lead to ?ow around the cylindrical caulking material for assisting in the expansion
.25 periphery of the ring before its expansion is of said ring.
completed. The cone also can be securely at
4. In anchorages of the kind comprising a
tached to the obturating ring by initially press
tapered bolt enlargement to be confined in the
ing it or starting it on the cone. This can be anchor hole and an expansible obturating ring
done with the kerfed rings without rupturing expanded by being driven onto the enlargement
30 or appreciably stretching them and forms a and held thereon by a body of caulking material,
practical attachment notwithstanding the taper, the improvement which consists in said ring hav
so that all three members can thus be united in ing its axial dimension longer than its radial
simple manner to form a single sales unit which thickness, its interior surface also longer than
has a general appearance shown by Fig. 5 and said thickness and its outwardly facing side, that
35 which will stay in unit form under all normal is exposed to the pressure of the caulking mate
conditions of shipment and use. As facilitating rial, disposed in a position substantially normal
this attachment the small end of the coned collar to the axis of the bolt, and said tapered enlarge
2 may have a less taper than its wider part. This ment being ?uted for transmitting caulkin
double taper is shown in the drawing, but the pressure to the interior of the ring.
'
40 ring can also be otherwise or additionally locked
5. In anchorages of the kind comprising a 40
to the cone if desired.
'
,
tapered bolt enlargement to be con?ned in the
The provision of the ?utes 8 on the coned sur
anchor hole and an expansible obturating ring
face of the collar serves the additional function expanded by being driven onto the enlargement
of preventing, or assisting in preventing, the and held therein by a body of caulking material,
45 rotation of the unit with relation to the drilled the improvement which consists in said enlarge 45
hole when the bolt of Fig. 1 is having its external mentbeing ?uted and said ring having its out
nut screwed on to it or when the unit includes wardly facing surface in contact with and sub
the nut for the bolt as in Fig. 3.
'
ject to axial pressure exerted by the caulking
From the description above given, it will now material and its internal surface exposed through
50 be apparent that the principle of the invention the ?utings of said enlargement to expanding 50
can be applied in various ways and with compo- . pressure from the caulking material.
nent members of different shapes and relation‘,
6. In anchorages of the kind comprising a
and that one or more of the adjunctive features
above described can be employed with it as de
55 sired, there being no intention to limit the scope
of this patent ‘to any particular type or design
except as pointed out‘ in the claims hereof.
I claim:
1. In anchorages of the kind comprising a
60 tapered bolt enlargement to be con?ned in the
anchor hole and an expansible obturating ring
expanded by being driven onto the enlargement
and held thereon by a body of caulking material,
the improvement which consists in said ring hav
65 ing an interior surface adapted to ride on the
taper of said enlargement and an exterior surface
adjacent and parallel to the wall of said anchor
hole, said surface being of substantially cylin
drical form adapted for making a surface contact
70 with said wall as the ring expands, the outwardly
facing side of the ring that is exposed to the
pressure of the caulking material being substan
tially normal to the axis of the bolt.
2. In anchorages of the kind comprising a
tapered bolt enlargement to be confined in the
tapered collar to be received on a bolt and con
?ned in the anchor hole and an expansible ob
turatin'g ring expanded by being driven onto the
collar and heldv thereon by a ring’ of caulking
lead, the improvement which consists in said
tapered collar being ?uted and both said rings
being arranged and mounted for axial movement
upon and along the ?uted surface thereof.
60
7. In anchorages of the kind comprising a
tapered bolt enlargement to be con?ned in the
anchor hole and an expansible obturating ring
expanded by being driven onto the enlargement
and held thereon by a body of caulking material,
the improvement which consists in said ring hav
ing its peripheral surface substantially cylindrical
and of substantially greater axial length than the
radial thickness of said ring, and a recess in the
side of said ring that is exposed to the caulking
pressure, said recess receiving the caulking mate
rial and presenting an inwardly facing surface
subject to the expanding pressure thereof.
8. In anchorages of the ldnd comprising a
tapered collar adapted to be received on a bolt 75
2,120,279
-
'
~
- ,3
I and be con?ned in the anchor hole and an ex
11. In anchorages of the kind comprising ‘a
pansible obturating ring expanded by being tapered collar for assembly on a bolt and to be
driven onto the taper and held on the collar by a
body of caulking lead, the improvement which
consists in said ring having a scarf joint permit
ting its expansion without opening a passage
through it and having substantially the whole
of its outwardly facing surface substantially nor
mal to the axial pressure exerted by the caulking
10 material.
9. The construction of the preceding claim
wherein the ring is formed with an oblique line of
weakness adapted to form said scarf joint when
it is ruptured by the expansion.
15
10. In anchorages of the kind described, a’v
tapered collar _for assembly on a bolt and to be
con?ned in the anchor hole and an expanding
obturating ring expanded by being driven onto
the collar and held thereon by a ring of caulking
20 lead, the improvement which consists of said oh
con?ned in the‘ anchor hole and an expansible ob
turating ring expanded by being driven onto the
collar and held thereon by a ring of caulking 5
lead, the improvement which consists in said
collar and ringsbeing held together as a sales
unit by means of a‘ least tapered part at the
smaller end of said collar upon which partone of
said rings is forced and to which it is held by 10
friction therewith.
'
12. In anchorages of the kind described, a ,
tapered collar for assembly on a bolt and to be‘
con?ned in the anchor hole and an expanding
obturating ring expanded by being driven onto 15
the collar and held thereon by-a vring of caulk
ing lead, the improvement which consists of said
obturating ring having an internal surface to ride _
on the taper of said collar and the exterior vcylin-t
turating ring having an internal surface to ride
drical surface initially of no greater diameter
than said collar and extending parallel to the wall
on the taper of the collar and an exterior surface
extending parallel to the wall of the hole and
adapted for making a surface contact with
25 said wall as the ring expands, one of said rings
with said wall as the ring expands, one of said
rings being held on the small end of said collar;
of the anchor hole for making a surface contact . -
to form a sales unit of said parts.
’ being frictionally held on the smaller end of said
collar to form a sales unit of said parts.
GEORGE o. HIEARS- ’
Документ
Категория
Без категории
Просмотров
0
Размер файла
464 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа