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Патент USA US3069201

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Dec. 18, 1962
c. c. DE PEW
Filed April 13, 1961
> /4
United States Patent O?tice
Patented Dec. 18, 19162
holes 14 are bored to facilitate mounting the body on
the underside of a support such as an airplane wing or
Chester C. De Pew, Farmingdale, N.Y., assignor to
the like, though other means such as welding may be
used to mount the body. A tubular wall portion 16
Aerpat A.G., Glarns, Switzerland, a corporation of 5 extends downwardly from the body ill to de?ne an open~
ended chamber is. Preferably, the wall 16 is cylin
Filed Apr. 13, 196i, Ser. No. M2376
7 (Ilaims. (Cl. 287-119)
This invention relates to load retaining devices and
more particularly, it concerns a retaining device of the
type having particular utility for retaining upon a support,
drical, though it is contemplated that other shapes may
be used in keeping within the scope of the invention.
Receivable in the chamber 18 is a load connected
member 2% preferably of a spherical con?guration adapt
ed to be connected to a load part 21, such as by an in
teriorly threaded recess 22 in the lower end thereof.
The upper end of the load connected member 2b is de
tachably connected to a coupling device 23 which in turn
An object of this invention is to provide a new and
unique retaining device which is adapted to releasably 15 is connected to terminal ferrule 24 of a lifting cable.
The cable coupler 23 extends through an aperture 25
support heavy loads in a highly effective manner.
in the closed end of the body 10 and is provided with a
Another object of this invention is a load retaining
barrel 26 having ball detents 27 held outwardly by a
device of the type aforementioned which is devoid of
central pin 23 into locking engagement with a down
complicated parts and thus low in cost yet substantially
a load lifted or otherwise drawn to the support by a
winch or other power means through a cable.
foolproof in operation.
A further object of this invention is the provision of
a load retaining device- of the typeireferred to which is
completely automatic in operation to engage and retain
a lifted load and which is very easily manipulated to re
lease the lifted load.
Another object of this invention is to provide a load
retaining device of the type referred to by which the de
tachable connection of a lifting cable to a load or load
connected member is greatly facilitated.
Other objects and further scope of applicability of the
present invention will become apparent from the detailed
description given hereinafter. It should be understood,
however, that the detailed description, while indicating
‘preferred embodiments of the invention, is given by way
of illustration only, since it will become apparent to those
skilled in the art from this description that various
changes and modifications can be made without departing
from the true spirit and scope of the invention.
In general, the aforementioned objectives are achieved
by a load retaining device including a body formed to
be attached to a supporting structure and having a tubu
lar wall portion extending therefrom to de?ne an open
ended chamber. A load connected member supported
on the end of a cable threaded through an aperture in the
end of the body chamber opposite from the open end
is adapted to be received in the chamber and held there
‘against the weight of the load by a plurality of detents
disposed in the body chamber wall. The detents are
received when in a retracted condition in a recess formed
in an axially biased sleeve slidably carried exteriorly of
the tubular Wall portion, the sleeve being locked against
its axial bias to a position ermitting retraction of the
‘detents. The means for latching the sleeve is releasable
‘upon insertion of the load connected member into the
chamber and upon release slides axially to move the de
tents into engagement with the load connected member
thereby retaining it Within thechamber and securing the
load to the support to which the body is attached.
A more complete understanding of the load retaining
device of this invention and its method of use may be
had by reference to the accompanying drawings in which:
FIG. 1 is a cross-sectional view showing in elevation
the load retaining device of this invention as a load is
being raised into its ultimate retained position;
FIG. 2 is a cross~sectional view vtaken along lines 2—2
of FIG. '1; and
FIG. 3 is a partial cross-sectional view similar to MG.
wardly facing shoulder 29 near the upper end of a cen
tral aperture 3% in the member Ztl. The bottom of the
aperture 36 is closed by a disc 32 on which rests a com
pression spring 34 for biasing upwardly an inverted cup
shaped member 36-. The cable coupler 23 is releasedv
either manually or electrically by causing the cen
tral pin 23 to move upwardly against abiasing spring
38, and this is accomplished by connecting pin 23
with a sleeve 40 slidably carried by the cable fer
rule 24-, the connection being effected by a pin 46a
passing through the sleeve 40‘ and through the upper end
portion of a stern 28a on pin 28. Ferrule 24 is slotted
to permit limited vertical movement of sleeve ‘it; which
may be accomplished by manually pulling upwardly on
the sleeve, or the sleeve may be pulled upwardly by ar
ranging a magnet winding 41 above the sleeve to pull
it upwardly but permitting the cable to run through the
winding in raising and lowering the load. The pin 28
is formed having a reduced end portion 42 so that upward
movement thereof permits retraction of the ball detents
27 from engagement with the shoulder 29, thereby per
mitting the spring 34 to eject the barrel 26 from the aper
ture Ell to disconnect the cable from the load.
A ca
ble coupler similar to that described above is disclosed
and claimed in the copending application of D. W. Price
et al. Ser. No. 755,775, filed August 18, 1958, now Pat
ent No. 3,011,239.
The lower end portion of the wall 16 is provided with
a plurality of apertures 44 within which are mounted
ball detents 46. The interior edge of the apertures 44
is suitably peened or staked (not shown) to prevent the
balls from moving into the chamber 18 and thus being
removed from the body. Slidably mounted on the ex
terior of the wall 16 is a sleeve 48 axially biased by a
compression spring 54} disposed between the body ?ange
55 12 and an annular ledge 52 in the sleeve.
The sleeve
48 is further provided with an interior annular recess 54
which, when the sleeve is in the position indicated in
FIG. 1, serves to permit the ball detents 46 to be re
tracted out of the chamber 18, thereby permitting the
‘entry or withdrawal of the load connected member 20
to or from the chamber in a manner which will become
‘apparent from the description which follows below. To
secure the sleeve 48 in the position shown in FIG. 1
so that retraction of the detents 46 is possible, the sleeve
carries a contractible ring 56 in an annular groove 58.
A groove to is provided in the annular wall 16, which
groove is dimensioned similarly as the groove 58 but
of a depth less than the radial extent of the ring 56, so
that when the ring is in a contracted position such as
1 but showing the device in its load retaining position.
Referring now to the drawings, the load retaining device
is shown in FIG. 1, it is located partly in the groove
of this invention is shown including a body lil, having 70 60 and partly in the groove 58 and thereby prevents axial
a radially extending ?ange portion 12 through which
movement of the sleeve 48.
A second group of apertures 62 are formed in the
wall 16 and in the same plane as the groove 60, for re
ceiving ring expanding elements preferably in the form
of spherical balls 64. The inner edges of the aperture 62
adjacent the chamber 18 are also peened or staked as the
apertures 44 to prevent removal of the balls 64 there
Accordingly, it will be appreciated by one skilled in the
art that the foregoing objectives are fully realized and
further, that while the described embodiment is a pre
ferred form of the invention, other forms and embodi
ments may be used without departing from the true spirit
and scope of the invention as de?ned by the appended
from. The balls 64», it will be noted, are of a diameter
I claim:
substantially equal to the thickness of the wall 16 so
1. A load retaining device comprising: a body; a tub
that when the ring 56 is in a contracted position, the
balls 64 are urged partially into the chamber 18. When, 10 ular wall portion extending from said body to de?ne an
open ended chamber; a load connected member receiv
on the other hand, the balls 64 are moved radially out
able in said chamber; an axially biased sleeve slidably
wardly so as to be within the con?nes of the wall 16,
the ring 56 is necessarily expanded or moved outwardly
so as to be free of the groove 65}, and the ring 56 does
not prevent axial movement of sleeve 43.
To insure against accidental disassembly of the mem
bers, the lower end of the wall 16 mounts on its exterior
side, retaining rings 65 which are positioned to permit
axial movement of the sleeve to the extent that the
shoulder 55 of the recess 54 may be moved past the -
ball detents 46, but engagement of the shoulder 55 with
the ring 66 prevents removal of the sleeve from the an
nular wall 16. Of course, movement of the sleeve in the
opposite direction is prevented by the ?ange 12.
In operation, it is assumed that the load with the parts
20 and 21 connected thereto is located on the ground
or deck below the body 10 and is to be elevated to the
body and suspended from the body. The cable coupler
mounted exteriorly of said tubular wall portion, said
sleeve having an annular recessed portion therein; a plu
rality of detents in said tubular wall portion; and means
for holding said sleeve against its axial bias to a posi
tion in which said detents are retracted within the re
cessed portion of said sleeve, said means including an
element extending into said chamber and movable out
wardly by said load connected member to release said
sleeve for axial movement to effect movement of said
detents to engage said load connected member for re
taining it in said chamber.
2. A load retaining device comprising: a body; an
annular wall portion on said body de?ning an open end
ed chamber and having a peripheral groove in the ex
terior thereof; a load connected member receivable in
said chamber; an axially biased sleeve slidably mounted
on the exterior of said wall portion; said sleeve having
23 with the cable attached thereto is lowered through
the opening 25. and the coupler 23 is inserted into the 30 an annular recess formed therein; a plurality of detents
in said wall portion; a contractible ring carried on said
aperture 36 of the load-connected member Ztl. When
sleeve and being engageable in said Wall portion groove
these parts have been so assembled, a lifting or pulling
to hold said sleeve against its axial bias in a position
force is applied to the cable, thereby elevating the load.
permitting retraction of said detents into said sleeve
Prior to lifting, the sleeve 43 will be locked in the posi
recess; and a plurality of ring expanding elements mount
tion shown in FIG. 1 and will be held against the bias
ed for movement in radial apertures in said wall portion
of the spring it) by engagement of the contractible ring
at the location of said groove and having a radial dimen
56 in the groove 66, thereby permitting the ball detents
sion equal to the thickness of said wall portion, said ex
46 to move outwardly of the chamber 18. Thus, as
panding elements engaging the inner surface of said ring
the load connected member 20 rises under the lift ap
and being biased by said ring to extend partially into
plied to the cable, it enters the chamber 18, moves past
the ball detents 46 and engages the ring expanding ele
said chamber and being engaged by said load connected
ments 64. As the member 20 moves past the balls
member upon entering said chamber to effect movement
64, the ring 56 is expanded out of the groove 60, per
of said elements outwardly to expand said ring, and re
mitting the sleeve 48 to be moved downwardly and
lease said sleeve for movement of said detents to a posi
forcing the detents 46 inwardly into engagement under
tion to retain said member within said chamber.
the major diameter of the member 20 as shown in FIG.
3. The device recited in claim 2 in which that portion
3. Since the detents 46 are bound by the sleeve 48, no
of said load connected member adjacent said wall is
outward movement thereof is possible, and accordingly,
the load connected member 20 is ?rmly retained within
4. The device recited in claim 2 in which said ring
the chamber 18 against the Weight of the load.
expanding elements are spherical balls.
When it is desired to release the member 2% from
5. The device recited in claim 2 in which said detents
the chamber 18, a force is again applied to the cable
are spherical balls having a diameter substantially greater
245 sufficiently to take the weight off the ball detents
than the thickness of said wall.
46. While the weight is so taken up, the sleeve 48 is lifted
6. The device recited in claim 2 including a lifting
against the bias of spring 50, and the load is then low
cable; means for detachably connecting said cable to said
ered until it passes below the level of the balls 64, at
lead connected member.
which time the contractible ring 56 engages the groove
7. The device recited in claim 6 in which said cable
60 to retain the sleeve 48 in the position of FIG. 1 ready
and said means for detachably connecting said cable ex
for another cycle. After the load has been lowered, to
tend through an aperture in said body coaxial with said
the desired location, the cable may be disconnected from 00
open ended chamber.
the load by release of the coupler 23 from member 20.
Thus it will be seen that by this invention there is
References Cited in the ?le of this patent
provided an extremely effective load retaining device
which is fully automatic to engage and support a lifted
load and is very simply actuated to release the load.
Wells ________________ __ July 17, 1956
Furthermore, the operation of the retaining device re
quires no special tools or special mechanical ability.
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