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Патент USA US2412409

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Dec. 10, 1946. I
Filed Feb; 17, 1943
mew/.5 w MART/N,‘
Patented Dec. 1Q, 1946
Eugene W. Martin, Denver, 0010.
Application February 17, 1943, Serial No. 476,137
4 Claims.
(01. 151-19)
This invention relates to lock nuts and meth
ods of assembling same, ‘and more particularly
relates to improvements in look nuts of the gen
eral type shown and described in Nicholay Pat
and 4%, which are initially formed as illustrated
in Figure 1. Nut member 49a has a depending
skirt 44 concentric with its lengthwise axis and
ent No. 2,301,634, issued November 10, 1942, for
?ange portion 45 at its lower end.
an annular groove 48 on said skirt provides a
Lock nut.
Nut member 401) has a cylindrical recess 42
The lock nuts shown in the aforesaid patent
concentric with its lengthwise axis and the en
employ a means for holding the nut members
trance 43 to said recess is of slightly less di
against relative movement while they are applied
ameter than the diameter of flange 45 of nut
to a bolt or the like. However, it frequently is 10 member 40a.
necessary to remove or adjust the positions of the
After being so formed, a band or insert 49 of
nuts after having been locked and dii?culties
yieldable material, such as ?ber, rubber or equiv
often arise due to “back-locking” in the attempt~
alent synthetic composition, is forced onto skirt
ed reversing action.
44 and seats in groove 48. The shape of insert
It is an object of the present invention to pro 15 49 is clearly shown in the plan View, Figure 6.
vide a simple, durable and efficient lock nut, the
Thereafter, nut members 40a and 40b are
individual members of which are joined together
?xedly or permanently joined by expanding en‘
and held for limited relative movement to attain
trance 43 or contracting ?ange 45 to attain the
the desired locking action.
position indicated in Figure 2. In this action,
Another object of the invention is to provide 20 the insert member 49 is pressed through the
simple and eflicient methods of assembling lock
entrance 43 and due to its yieldable character,
nuts preparatory to use.
passes through said entrance without excessive
A further object of the invention is to provide
deformation. Because of the eccentric relation
an eccentric lock nut in which one member can
ship of insert 49 to recess 42 and skirt 44, the
be moved relative to another for a distance su?i 25 lengthwise axes of the nut members are held
cient to attain the desired action but which is
out of alinementas clearly shown in Figure 2.
dif?cult to turn in a reverse direction to lock
The members are next brought into alinement
said members.
through the use of suitable tools and while so
Other objects reside in novel details of con
held are tapped and threaded, with the threaded
struction and novel combinations and arrange~
bore 4| of this form concentric with the length
ments of parts, all of which will be described in
wise axes of the respective nut members. Upon
the course of the following description.
removal from the members, the insert 49 will
To afford a better understanding of the in
vention, reference will be made to the accom
bers. However, when the lock nut is applied to
cause a slightly offset relation between said mem
panying drawing illustrating the invention. In 35 the thread of a bolt or the like, the tool used for
the drawing, in the several views of which like
parts have been designated similarly,
Figure 1 is a vertical section through the two
turning the nut moves them into coaxial rela
_ tionship permitting easy threading on the bolt.
When the desired position has been attained the
tool is withdrawn, whereupon the insert exerts
features of the present invention, prior to their 40 sufficient lateral movement to produce a slightly
being tapped and joined;
o?set relationship which binds the members
Figure 2 is a vertical section through the nut
against conjoint movement along the thread un
members of Figure 1 illustrating an initial stage
der the in?uence of vibration or similar causes.
in the assembly;
It will be apparent from the foregoing descrip
Figure 3 is a section similar to Figure 2 and 45 tion that in the lock nut of the invention, the
illustrating a ?nal stage in the assembly;
respective nut members are assembled by moving
Figure 4 is a section taken along the line 4—4,
a wider skirt portion on one member into a recess
Figure 2;
on another member having a narrower entrance
through temporarily imparting different relative
Figure 5 is a section taken along the line 5-5,
Figure 3; and
50 dimensions to said nut members, and then caus
Figure 6 is an insert member used in the as
\ing them to resume their normal dimensional re
sembly of Figure 3.
lationship to provide a ?xed or permanent union.
Figs. 1 to 6, inclusive, illustrate a preferred
Likewise, there is a concentric-eccentric rela
form of the invention. The lock nut of this in
tionship between the threaded bore and one or
vention comprises complementary members 40a 55 more adjoining parts of the respective nut mem
nut members of a form of a lock nut embodying
‘here, which produces forces directed laterally of
the bolt to effect a binding engagement of the
nut members.
l. A look nut comprising two nut members
having internally threaded bores adapted for co
axial aline-ment on the thread of a bolt or the
‘like, one said member having a recessed portion
The lock nut design illustrated in the drawing ’
is intended merely as a typical embodiment of III comprising a cylindrical socket section and. a
cylindrical entrance portion of lesser diameter
the invention and it will be apparent from an
than the socket portionand out of axial aline
ment with said threaded bore, the other said
member having a cylindrical skirt portion ter
10 minating at its outer end in a cylindrical flanged
the invention.
While metals will be most satisfactory for
portion out of axial alinement with the threaded
most purposes in forming nut members embody
bore and of greater diameter than said entrance
ing features of the present invention, it will be
portion, the members being assembled with the
understood that for some purposes synthetic.
flanged, portion of the skirt extending through.
compositions, such as plastics, may be utilized '
the narrower entrance portion and into the socket
in place of metals, and where such materials are
portion of the other said member; wherebyv said
used, the pressing method of assembly will'be
members may be rotated conjointly in perma
most satisfactory.
nently attached relation along the thread of a
The degree of eccentricity incorporated intov
bolt and rotated independently at any selected
the designs is largely a matter of individual pref
position on said thread to lock the assembly
erence, and in practice it has been found that
against further movement thereon, and resil
even a relatively slight eccentric relationship
ient means on said skirt portion arranged to be
will provide a positive locking action.
compressed by said socket member when the
While the invention has been illustrated in its
members are rotated independently to hold said
use on a bolt, it will be understood that the lock
members against relative rotational movement.
nuts of the present invention can be installed
2. A lock nut, as de?ned in claim 1 'in which
on any type of a threaded member, and positively
the threaded bores of said members are __,con
locked in or out of engagement with some other
centric with the bolt and the recess and ?anged
member on the threaded member. Consequently,
portion-are eccentric thereto.
" p
. ~
examination thereof that other structural forms
may be provided utilizing the novel features de
scribed herein within the spirit and scope of
the expression “on a bolt or the like” has been 30
employed in the speci?cation to designate the
variety of uses for which the present invention
‘3. A look nut, as de?ned in claim 1 in which
the threaded bores are eccentric to the bolt and
the recess and flanged portion are concentric
is intended.
Changes and modi?cations may be availed of
within the spiritand scope of the invention as :35 said skirt portion is provided with a peripheral
de?ned in the hereunto appended claims.
What I claim and desire to secure by Letters
Patent is:
groove for receiving said resilient means.
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