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Патент USA US2406957

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Sept. 3, 1946.‘
I‘ I H, MccARTHY '
‘
2,406,951
HANDWHEEL ATTACHING MEANS
7 Filed Aug; 8, 1944'
BY
'
Patented Sept. v3, 1946
2,406,957
UNITED STATES :PATENTV‘OFFICE
Harry McCarthy, Kewanee: Ill., 'assignor to Wal
worth Patents, Inc., Boston, Mass, 9. corpora
tion of Massachusetts
Application August 8, 1944, Serial No. 548,618
4 Claims. (01. 2.857553)
This invention relates to securing means for
handles and more particularly to improved means
for connecting the stems and handwheels of
valves against relative rotation.
Connections of the stated type generally have
2
'‘‘-stem of otherwise conventional form, has one
end ‘provided with a non-circular portion, also
speci?cally of D-shaped cross-section, for engag
ing the complemental aperture it in the hand
wheel. Preferably, the D-shaped stem portion
projects beyond the handwheel hub 52 but ter
minates below the plane of the rim l4 thereof.
a tapered square formed on the valve stem and
terminating in a reduced threaded extremity.
The projection 24 so formed is threaded for the
The valve handle or wheel is suitably cored or
reception of a nut 26 which may abut a suitable
otherwise formed with a tapered square aperture
for ?tting more or less snugly upon the squared 10 Washer or nameplate 28 resting on the surface of
stem portion and is secured thereon by means of
the hub l2. As the nut 26 and associated parts
lie below the rim i4 no interference or hazard is
a nut engaging the threaded end. These ar
encountered by the operator’s hand.
rangements are subject to various defects and
It will be apparent that the threads on pro
disadvantages which this invention seeks to
jection 24 may conveniently be formed prior to
milling the ?at section 30 of the D-shaped stem
Among the drawbacks encountered in prior
portion. The milling operation produces a
constructions is the dii?culty of securing a tight
rounded shoulder 32 against which the rounded
fit between the machined stem square and the
edge 20 of the hub can be forced by the nut 26
cored handwheel. It is apparent that the ta
pered shape of the aperture does not lend itself 20 in wedging relation. Moreover, the aperture it
lends itself to the use of a breaching operation
to a broaching operation or other convenient
which can be conducted to precise measure
machining process for sizing purposes. Another
ments. A snug and lasting ?t between the hand
prime disadvantage is the necessity for using a
wheel and stem is thus secured.
reduced threaded portion which weakens the
stem at that point. Moreover, the prior con 25
It may not be essential to machine both‘ the
structions are generally rendered more expensive
aperture and the stem, or either of them, to se
cure a reasonably tight ?t. The wedging rela
to manufacture due to the plurality of machined
tion established by the shoulder 20 and edge 32
surfaces on the stem.
An object of the invention is to ensure a snug
as described may be relied upon to give the re
30 quired security against loosening without close
and lasting ?t between a handle and a stem.
engagement between the D-shaped aperture and
Another object of this invention is to eliminate
the D-shaped stem portion. Also, the stem
weakened parts which may become broken off
overcome.
during installation or use.
. shoulder 20 may be tapered instead of rounded
Another object of this invention is to obtain
and the edge 32 may be left unrounded if desired.
the foregoing advantages while reducing the cost 35 The threaded projection 24 is disclosed as of
of manufacture of such devices.
Other objects and advantages will become ap
parent from the following description taken in
connection with
wherein:
the
accompanying
_
substantially the same diameter as the stem 22.
An appreciable reduction in the size of this pro
lection diameter would tend to weaken the stem
at this point but would not otherwise defeat the
drawing .
40 purposes of this invention.
Fig. 1 is a plan view of the improved handle
and stem construction;
All these and other
modi?cations will be‘ apparent and it is to be
understood that the illustrative embodiment is
not to be taken as limiting the scope of this
invention
as set forth in the appended claims.
Referring more particularly to the drawing, the 45
I claim:
invention is shown as applied to a conventional
1. Securing means of the character described
non-heating or ventilated ‘handwheel H) for
comprising a handle having an aperture there
valves having a hub l2 located below the plane of
through longitudinally ?attened on one side
the rim I4 thereof. The hub I2 is provided with
an aperture [6 therethrough of non-circular 50 thereof de?ning a segmental-circular cross
‘ section, a stem having a ?attened side de?ning a
form, speci?cally D-shaped in cross section. The
Fig. 2 is a cross section; and
Fig. 3 is a section on line 3-—3 of Fig. 2.
complemental segmental-circular portion engag
ing the walls of said aperture and projecting
therebeyond, said projection being threaded on
pose apparent hereinafter.
A cylindrical stem 22, which may be a valve 55 the un?attened side thereof, and a nut engaging
?at section l8 of the D-shaped aperture prefer
ably has one edge 20 thereof rounded for a pur
2,406,957
3
4
taining said handle on said stem.
2. Securing means of the character described
comprising a handle having an aperture there
the walls of said aperture and projecting there
beyond, said portion de?ning a shoulder on said
stem, and means engaging with the un?attened
portion of said projection for retaining said han
through longitudinally ?attened on one side
dle on said stem in wedging relation with said
said threaded portion of said projection for re
shoulder.
4. Securing means of the character described
comprising a handle having an aperture there
de?ning a complemental segmental-circular por
through longitudinally ?attened on one side de
tion engaging the walls of said aperture and pro
jecting therebeyond, said projection being, 10 ?ning a D-shaped cross-section, a cylindrical
stem having a ?attened side portion de?ning a
threaded on the un?attened side thereof and
coinplemental D-shaped cross-section engaging
being of substantially the same diameter as said
the walls of said aperture and projecting there
stem, and a nut engaging said threaded portion
beyond, said portion de?ning a shoulder on said
of said projection for retaining said handle on
stern and said projection having threads on the
said stem.
un?attened side thereof of substantially the same
3. Securing means of the character described
diameter as said stem, and a nut engaging said
comprising a handle having an aperture there
threads for retaining said handle on said stem
through longitudinally flattened on one ‘side
in wedging relation with said shoulder.
de?ning a D-shaped cross-section, a, cylindrical
stem having a ?attened side portion de?ning a
HARRY MCCARTHY.
complemental D-shaped cross-section engaging
thereof de?ning a segmental-circular cross-sec
tion, a cylindrical stem having a ?attened side
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