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Патент USA US2410818

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H. c. GRANT, :JR
FREE WHEELING cLUTcH- `
Filed Sept. '7, 1942
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Patented Nov. l2,"
2,410,818 ¿
UNlro STATES PATENT] orne ’
FREEWHEEIJNG CLUTCH
Harry C. Grant, Jr., New York, N. Y., as
signor to Speclalties'Development Corporation,
Bloomiield, N. J., a corporation of New Jersey '
ApplicationSepteml-ier 7, 1942, Serial No. 457,609
12 Claims. (ACI. 192-_45)
i
intermittently transmitting rotary motion from a
driving member to the member to be driven.
Referring~ to the drawing, a driving member
il) ismounted on a driving shaft itin any known
or desired manner. The driving member is of a
More particularly. the invention relates to the
-substantially disc-like form and is of a size so as
provision of novel means for retaining balls or
to ñt into and freely rotate within‘a recess I2
of a substantially cup-shaped driven member i5.
The driven member i3 may be secured on a driven
The present invention relates to clutches for
rollers which are ordinarily used in free-wheeling
clutches as a means for providing the motion -
transmitting connection between the driving
shaft i4 by any preferred fastening means. The
driving member l@ is provided on its periphery
It has been known to form a clutch arrange 10 with a series of pockets or recesses i5, oi’ which
ment bythe provision of ball or roller members
four are shown in the drawing. It will be under
between a smooth cylindrical surface and a
stood that 'any other desired number of these
. member and the driven member.A
member provided with substantially tangential
pockets may be utilized without departing from
surfaces to wedge against the ball or rollermem
the scope of the invention.
,
ber, and various methods _have been proposed to 15 The pockets l5 .contain members it of mag
retain such ball or roller- members in a neutral
position and out of contact with one of the sur
faces when the clutch is not engaging, as when
ähe driven member has overrun the driving mem
er.
According to my invention I provide positive
means for holding the motion transmitting con
necting members in a neutral position. This
has the advantage that' the roller or ball mem
’ netic material for transmitting the driving power
to the driven member, «which may be cylindrical
rollers, as illustrated.' The bottom of each pocket
i5 forms a substantially chord-like extending
20 surface on the periphery of member i@ which is
inclined in such a manner that when the driving
member it is rotated in the direction of the
arrow, the rollers i6 are made to travel up the
-inclined bottoms of the pockets i5, and to wedge
bers are prevented from being flung about and 25 between the pocket bottoms and the inside wall
do not wear out or damage the operating sur
of the recess t2. The sides of the driving member
faces of the clutch during the free-wheeling op
it may be formed with suitable ñanges or pro-fI
eration thereof.
"
l' jections il and i8 to laterally'retain the rollers
I attain this effect byr providing magnetic
it in their respective pockets.
means, which, during free~wheeling of the clutch. 30 Ordinarily, when the driving member l@ is at
attract and hold the balls or rollers in a neutral
rest, several of the rollers it are in the deep ends
and relatively fixed position with respect to one
of the pockets, as indicated in broken lines at
of the two rotating members of the clutch.
ßâa, and will be vout of engagement with the wall
An object of the present invention is to provide
of the recess i2. Some ofthe rollers, however.
a new and improved free-wheeling clutch which 35 due to gravity or friction, will tend to remain
is simple in construction and has improved wear
half way out of the, deepest part of their re
ing qualities.
spective pockets, and will thus be subject to con
Another object is to provide a .free-wheeling
siderable ñinglng about due to interaction of
clutch wherein suitable means positively hold the
friction, centrifugal force, and gravity during
motion transmitting connecting members in a 40 free-wheeling.
.
neutral position during the free-wheeling opera
In order to overcome this undesirable condition,
tion of the clutch.
I have provided adjacent vthe deep ends of each
Another >object is to prevent the flinging about
of the pockets i5, a permanent magnet 2| which
of the motion transmittingconnecting members
when they are not forming a motion transmitting 45 may be arranged diametrically with respect to the
member l0 and may be embedded in the body of
connection, whereby damage to the clutch and
to the members ls held to a minimum.
These and further objects will- become apparent
as my invention is described in greater detail in
the member i 0 or otherwise secured thereto.
The outside poles of these magnets are positioned
substantially adjacent the deep ends of the .
connection with the accompanying drawing, to" pockets and exert a constant attracting force on
wherein:
A
Figure 1 is an elevational view of my improved
clutch, shown schematically; and Figure 2 is a
sectional view of the same, substantially on the
line 2-2 of Figure 1.
the rollers, so that, as soon `as relative rotation
between members l0 and i3 ceases or whenthe
_driven member overruns the driving- member, the
rollers I6 will be attracted toward and positively
held in the deep-ends of their respective pockets.
« 2,410,818
.
The driving and driven members of course are
4
»
The magnetic attraction is of such a magni
tude that the rollers are retained only until a
proper predetermined centrifugal force is elIec
means adjacent the deep end of each of said
recesses for urging and retaining said wedging
member in the deep end of its recess.
3. In a free-wheeling clutch mechanism, the
combination of a cylindrical driving member and
tive, that is, when the member IU has attained
a given rotative speed in the direction of the
and capable of free rotation with respect to each
formed of substantially non-magnetic material.
a cup-shaped driven member adjacent each other
'
other, said driving member being disposed in
The construction shown herein, for purposes
said driven member and having its peripheral face
of illustration, may be varied to suit requirements 10 spaced from the inner circumferential face of
or preferences. The relation of the driving and
said driven member, said peripheral face having
driven members may be reversed, the motion
one 'or more recesses increasing in depth in a
transmitting connecting members I6 may be ball
circumferential direction, a wedging member of
bearing or the like, and the shape of the pockets
magnetic material in each of said recesses adapt
arrow'.
may be any desired form.
‘
It will be readily seen that, when the relative
motion of members I0 and I3 is such that the en
gagement by the members I5 of both the mem
bers I0 and I3 is~ no longer necessary,.the~at-
ed to be moved into a wedging position between
said faces by a force established upon rotation
o_f said driving member, and magnet means ad
jacent the deep'end of each of said recesses for
urging and retaining said wedging member in the
20 deep end of its recess.
tracting force of the magnets operates to posi
tively maintain the members I6 out of contact
4. In. a-free-wheeling clutch mechanism, the
with the member I3 by attracting them and hold
combination of a driven member and a driving
ing them in the deep ends of the pockets.
member arranged within said driven member,
Bouncing and flinging about of the roller mem
said members capable of free rotation with re
bers is 'thus prevented, and the life of the fric 25 spect to each other and said driving member
tion surfaces of the clutch members is thereby
having one or more recesses increasing in depth
greatly prolonged.
i
`
in a circumferential direction, a wedging mem
From the foregoing description, it will be seen
ber ‘of magnetic material in each of said recesses
that the present invention provides an improved
adapted to be moved into a wedging position
free-wheeling clutch which is generally adapted 30 between said members by a force established
for use where intermittent transmission of power
upon rotation of said driving member, and mag
is employed, and which overcomes the disad
net >means adjacent the deep end of each of said
vantages of the clutches proposed heretofore in
recesses for urging and retaining said wedging
accordance with the objects set forth herein.
member in the deep end of its recess.
As various changes m'ay be made in the form, es
5. In a free-wheeling clutch mechanism, the
construction and arrangement of the parts here
combination of a disc-like driving member and
in, without departing from the spirit and scope
a cup-shaped driven'member receiving said driv
of the invention and without sacrificing any of
ing member in spaced relation therewith, said
its advantages, it is to be understood that all
members being capable of free rotation with re
matter herein is to be interpreted as illustrative 40 spect to each other, said driving member having
and not in any limiting sense.
one or more recesses increasing in depth in a
It is also to be understood that the following
circumferential direction, a wedging member of
claims are intended to cover all the generic and
magnetic material in each of said recesses adapt
specific features of the invention herein de
ed to be moved into a wedging position between
scribed, and all statements of the scope of the 45 said members by' a force established upon rota
invention which, as a matter of language, might
tion of said driving member, and magnet means
be said to fall therebetween.
embedded in said driving member adjacent the
I claim:
deep end of each of said recesses for urging and
l. In a free-wheeling clutch mechanism, the
retaining said wedging member in the deep end
combination oi’ a driving member and a cup 50 of its recess.
shaped driven member receiving said driving
6. In a free-wheeling'clutch mechanism, the
member and with said members being capable
combination of a driven member and a driving
of free rotation with respect to each other, said
driving member having one or more recesses
increasing in depth in a circumferential direc
tion, a wedging member of magnetic material in
each of said‘recesses adapted to be moved into
a wedging position between said members by a
force established upon rotation of said driving
member, and magnet means rotatable with said
driving member and disposed adjacent the deep
end of each of said recesses for urging and re
-taining said wedging member in the deep end
of its recess.
2. In a free-wheeling .clutch mechanism, the
combination of a driving member and a driven
member embracing said driving member and with
said members being capable of free rotation with
respect to each other, said driving member hav
ing one or more recesses increasing inl depth‘in
a circumferential direction, a wedging Imember
of magnetic material in each of said -recesses
adapted to be moved into a wedging position be
tween said members by a force established upon
rotation of said driving member, and magnet
member arranged within said driven member, said
members- capable of free rotation with respect
55 to each other and said driving member having
one or more recesses increasing in depth in a
circumferential direction, a wedging member of
magnetic material in each of said recesses adapt
ed to be moved into a wedging position between
said members by a force established upon rota
tion of said driving member, and magnet means
on said driving member adjacent the deep end
of each of said recesses for urging and retaining
said wedging member in the deep end of its
recess.
7. In a free-wheeling clutch mechanism, the
combination of a driving member and a driven
member arranged about said driving member and
with said members being capable of free rotation
with respect to each other, said driving member
having one or more recesses increasing in depth
in a circumferential direction, a, rotatable wedg
ing member of magnetic material in each of said
recesses adapted to be moved into a wedging posi
tion between said members by a force established
2,410,818
l s
‘ upon rotation of said driving member, and mag
6
rotation of said members, and magnetic means
net means for each of said recesses and disposed
adjacent the deep end of each of said recesses for
urging and retaining said wedging member in the
counteracting any tendency of said clutch means „
deep end _of its recess.
member provided with an annular clutch face
8. In a free-wheeling clutch mechanism, the
combination of a driven member and a driving
member arranged within said» driven member,
towards establishing said relation until said pre
determined force prevails.
_y
l1. In a clutch mechanism, a rotatable driving
having a recess therein, a driven member mount
ed for rotation relative said driving member and
having an annular face adjacent and opposed to
said members capable of free' rotation with re
spect to each other and said driving member 10 said face of said driving member, magnetic re
sponsive clutch means movably disposed in said
having one or more recesses increasing in depth
recess operable upon rotation of said driving
in a circumferential direction, a rotatable wedg
member to establish' a clutched relation between
ing member of magnetic material in each of said
said faces for effecting unitary `rotation of said
recesses adapted to be moved into a. Wedging
members, and magnetic means counteracting any
position between said members by a force estab
4tendency of said clutch means to establish said
lished upon rotation of said driving member, and
relation until said clutch means are subjected to
magnet means on said driving member adjacent
aypredetermined force established by rotation of
the deep end of each of said recesses for urging
said driving member.
’
and retaining said wedging member in the deep
12. In a clutch mechanism, a driving member
20
end of its recess`
mounted for rotation having van annular clutch
9. In a, free wheeling clutch mechanism, the
face provided with a plurality of circumferentially
Icombination of a driven member and a driving
spaced inclined recesses increasing in depth in
member arranged within said driven member,
a circumferential direction, a driven member
said members being capable of free rotation with
respect to each other and said driving member 25 mounted for rotation relative to said driving
member and having an annular face adjacent and
having one or more recesses, a clutch element of
opposed to said ~face of said driving member,
magnetic material in each of said recesses adapt
magnetic responsive clutch means freely movably
ed to be moved into clutching relation between
disposed in each of said recesses operable upon
said members by a force established upon rota
tion of said vdriving member, and magnetic means 30 rotatio'n of said driving member to establish a
clutched relation between said faces for effecting
adjacent said recesses for urging and retaining
unitary rotation of said members, and magnetic
said clutch element out of engagement with said
means for maintaining said clutch means in the
driven member.
'
deeper portions of said recesses to counteract any
10. In a clutch mechanism, a pair of substan
tially nested clutch members capable of` relative 35 tendency of said clutch means to establishfsaid
relation until said clutch means are subjected to
rotation, magnetic responsive clutch means car
a
predetermined force established .upon rotation
ried by the inner member and operable when sub
of said driving member.
jected to a predetermined force upon rotation of
saidinner member to establish a. clutched rela
tion with the outer member for effecting unitary 40
HARRY C. GRANT, Jn.
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