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March 11, 1947.
Filed Aug. 5, 1940
Patented Mar. 11, 1947
Marsdenv Ware, Huntington Woods, .Mich., as
signor to-Packard Motor Car Company, Detroit,
Mich., a corporation of Michigan
Application August 3, 1940', Serial N0. 350.309‘
6 Claims.
(01. 184-6)
This invention relates to engine crankshafts
and more particularly to lubricating systems as
sociated. with crankshafts'.
An object of the invention is to provide a
crankshaft with ?ltering means for oil fed there Cl
through to the connecting rod bearings.
Another object of‘ the invention isto provide a
crankshaft in which plugs can be readily located
and secured to closed hollow bearing portions to
provide an internal oil feeding system.
A further object of theinvention resides in the
treatment of crankshaft cheeks whereby oil pas
sages and pl‘ug‘anchor meanscan- be formed by a
single operation.
Still another object of the invention: is to pro
vide a sectional plug for a hollow‘ crankshaft
bearing thatcan be readily assembled and‘ secured
in position.
Other objects of the invention will appear from
in a conventional manner to openings 22 through
the associated bushings. Such bushings have an
interior groove, 23 extending around one half
thereof into which opening 22 leads and: the
main crankshaft bearing portions are radially
drilled to form oil feeding passages 24. Thus
passages 2s register with grooves 23 during‘ one
half of each revolution of the crankshaft and oil
will ?ow therethrough to the. hollow interior of
the bearing portions.
The rod bushings Zil are formed with semi-cir
cular interior grooves 25. with which radial pas
sages 28 through the rod. bearing portions register
during each half revolution. of. the crankshaft.
Thus oil from the interior of the. rod. bearing
portions will- be fed between the rod. bearing
portions and their bushings. Oilso/fed. willmove
axially of the bearing structures and will fall
engine casing. Where it is again picked
the following description taken. in: connection 20 up bythe
the pressure lubricating. system.
with the‘ drawings, which form a part. of this
speci?cation, and in which:
Fig. 1 is a fragmentary elevational' view- of a
crankrhaft having the invention incorporated
1 In order to feed the oil from the hollow main
bearing portions to the rod bearing portions of
the crankcase, the cheek portions aredrilled from
one end forming a passage 30 between the‘ open
ings Iii. therein. The cheeks will also thus be
Fig. 2 is a longitudinal sectional view of‘ a sec
with open end passages 3| and in some
tion of the crankshaft;
instances the cheek end remote-from the drilled
Fig. 3‘ is a transverse sectional view of the
end can be drilled to form a; blind opening 32.
crankshaft through one of the connecting rod
Passages 30 form oil feeding channels while pas~
bearing portions taken on line 3—3‘ of Fig; 2;
sages 3! and 32 provide seats for pilot members 33.
Fig. 4 is a perspective View of the middle sec
Plug structures are provided in the. hollow
tion of one of the plugs for a hollow bearing
crankshaft bearing portions and adjacent cheek
openings to seal the oil therein, to provide a. con
In the drawing, it.‘ inclicatesgenerally a multi
between the passages 30 in the cheek
throwvv crankshaft for an internal. combustion 35
and the interiors of the adjacent hollow
engine having a plurality of main bearing por
crankshaft bearing portions, and to separate
tions H and rod bearing portionsv 52 joined. by
foreign particles‘ from the oil and prevent their
check portions l3. The crankshaft-main bearing
through the crankshaft bearing portion
portions are carried by engine casing webs l 4 hav
ing bearing. portions [5. to‘which. bearing caps l6 40 passages. These plug structures 34 for the rod
bearing portions of the crankshaft are slightly
are appliedin aconventional manner. Piston rods
different from the plug structures 35 in" the main
ii are mounted on the rod bearing’ portions of
bearing portions but in eachcase they. consist of a
‘the crankshaft’ in a conventional manner; The
plurality of axially aligned sections that can be
cheek: portions of‘ the crankshaft traverse and
extend beyondthe endsgof the adjacent: bearing
portions and are provided with openings 18 that
are formed as continuations of cylindrical axial
openings i9 through the. bearing portions.
_Plain. bushings 20 are arranged between the
bearing, portions of the crankshaft and’ the rod
and casing bearings, the rod-bushingswbeing ?xed
in the rod hubs and the- main bearing; bushings
readily located and secured.
{The plug structures‘ at consist of three sec
tions 36, 31' and 38, the end sections 36' and 38
having stem portions Sill-with peripherally ?anged
disk portions 40 at one end. These disk portions
close-the openings in the cheek openings on each
end of the hollow interior of the rod bearing.
portions. and are formed. with peripheral. slots 4!
to: receive the; pilot membersv 33. These. disk
portions. are, alsov formed with. angularly' extends
M. of; the. casing; are drilled- to, form. passages; 2|
leading from a pressure oil system“ (notrsho‘wn) 55 ingpassages llz-througl'i their. flangesthat regis
ter- with openings 30in the cheek portionsof‘t-he
beingr?xed: tether supporting hearings. The webs
to be limited only as indicated by the scope o!
crankshaft and open into the interior of the rod
bearing portions of the crankcase at a point in
wardly of their periphery. The intermediate sec
the appended claims. ’
What is claimed is:
tion 31 of these plug structures has a stem por
ing portions having radially extending oil pas
tion 43 and the ends are formed irregular and
complementary to theinner ends of the stems
of sections 36 and 38 so that they will interlock
sages and' axial openings therethrough, cheek
to prevent rotation of the sections relatively. A,
pair of spaced disk ?anges 44 extend from the
1'. A crankshaft comprising main and rod bear
portions connecting said bearing portions, said
cheeks having openings forming continuations of
the bearing portion openings and a drilled pas»
sage extending through one end into the opposite I
central section stein portion and are of the same
end with the central portion of each passage con
diameter as the hollow interior of the rod bear-‘
necting the openings, internal pilot members seat
ing portions of the crankshaft except for cut
ed in the inner end portions of the passages and '
away or ?attened peripheral portions 45. When
projecting into the cheek portion openings, and V
assembled the disk ?anges M con?ne the pas
sectional plug structures secured in the openings
sages 26 therebetween with the ?attened pe 15 in the cheeks and bearing portions, the end sec
ripheries on the opposite side of the rod bear
tions of said plug structures being insertable sep
ing portion interior and this relation issecured
arately endwise into the ‘openings in adjacent
through means of the location of the pilot mem
cheeks and having peripheral slots extending ax
bers 33 and the location of slots 4i. Bolts t6 ‘ ially to one end ,for receiving said pilot members.
extend axially through the sections 36, 31 and 38, 20 2. A crankshaft comprising main and rod bear
ing portions having/axial openings and radial oil
passages therethrough, cheek portions connecting
said bearing portions having openings there
through forming continuations of the openings
and the :sections 36 and 38 are drawn up and
clamped against the pilot members 3| by nuts
41. * Thus the plug structures are readily ?xed
axially from rotation and con?ne the oil passages
in said bearing portions, said cheek portions hav
26 between ?anges 44.
The plug sections 35 have ?anged disk end
ing passages therethrough connecting the open
ings in the cheek portions, pilot means seated in
sections 50 and an intermediate spacer stem
the cheek portions and projecting intothe open
section 5|. VThese disk sections are formed simi
lar to the disk portions of sections 36 and 38.
ings thereinninterlocking sectional plugs in the
They have a peripheral slot 52 in which the
openings in the bearing portions and cheek por
pilot members can project, adiagonal passage
53 through the ?ange registering with the, adja
cent cheek portion passage 3B and opening into '
the interior of the main bearing portions of the
crankshaft within the peripheries. The stem
tions having axially extending peripheral slots
sectionabuts the disk sections and bolts 54 ex
tend-therethrough and the sections are drawn
3. A crankshaft comprising main and rod bear»
ing portions having radial oilv passages and axial
togetheraxially by nuts 55. The pilot members
openings therethrough, cheek portions connecting
adjacent bearing portions having openings there
in the end portions thereof for receiving the pi
lot means when moved endwise into the openings,
and means clamping the end sections of the plugs
axially against the pilot means.
serve as abutments that prevent rotation of the
disk sections; to limit the clamping action of the
securing means and as a part of the ‘oil feed
ing conduit.
' '
through forming continuations of the bearing
portion openings, said check portions having pas
sages connecting the interiors of adjacentbear
ing portions, plug means having slotted end sec
Oil is moved into the interior of the main
bearing portions of thecrankshaft under pres
‘ tions closing the ends of the interior of the hol
sure through web passages 2|, the bushings and
passages 23. From such spaces the oil is moved
low bearing portions and overlying the cheek
portion passages, said plug means having passages
therein for connecting the openingsin the cheek
portion passages, pilot means ?xed in openings
in the cheek portions and projecting into the
by pressure and centrifugal force through the
plug passages 53 to the adjacent cheek portion
passages 30' and through the disk passages 4'2 to
the interior of therod bearing portions of the
openings therein in a relation to enter the, slot
crankshaft. The oil passes over the ?attened
ted portions of said plug means to register the
portions 45 of ?anges 44 into the space therebe
.plug means passages with the cheek portion pas
tween and then through passages 26 to the groove
sages and prevent rotation of the plug means, and
25 in the rod bushing. Any foreign particles in
means clamping the plug means sections axially
the oil in the hollow crankshaft bearing portions 1'1? against said pilot means.
will be thrown outwardly by'centrifugal force so
4.. A plug structure for a hollow crankshaft
that the ?anges 44 will substantially prevent
bearing portion comprising three aligned sec
such particles from moving to the outlet passages
tions, the end sections each'having a stem with
26, con?ning them in the bearing portion in
a radially extending disk ?ange at one end and
terior. As'the diagonal feeding passages in the
the middle section having a stem with radially
disk portions of both types of plug sections ter—
extending spaced disk ?anges intermediate its
ends, said spaced disk ?anges having correspond
ing ?attened portions, the adjacent ends of said
stems interlocking to prevent relative rotation of
minate Within the periphery of the hollow bear
ing portions of the crankshaft, foreign particles,
heavier than oil, thrown outwardly by centrifugal
force will be held outside of the ends of such
passages so that they will not ?ow therethrough.
Thus foreign particles in the oil fed into the
crankshaft will, for the most part, be trapped
sothat they will not ?ow on to the bearing sur
said sections, and means securing the sections
together axially.
skilled in the art.
ing portions having axial openings and radial
= passages therethrough, cheek portions connect
Although the invention has been described in
connection with aspeci?c embodiment, the prin
ciples involved are susceptible of numerous'other ,
applications which
5. A crankshaft comprising main and rod bear
will readily occur to persons .
The invention is therefore 75
ing said bearing portions having axial openings
therethrough aligned with‘ the bearing ‘portion
openings and radial passages therethrough cone
necting the'openings therein, pilot means in the
radial passages in the cheek‘portions and pro
Jecting into the axial openings therein, a plug in
of disks being cut away on a peripheral por
the openings in the bearing and cheek portions
tion thereof and all of the disks being other
having three axially aligned sections adapted to
wise similar in radius to the interior of the
interlock in a predetermined relationship at their
bearing portion, and means clamping the stem
adjacent ends, the end sections having openings
portions of the sections together in an axial di
therethrough connecting the passages in the
cheek portions with the openings in the bearing
portions and peripheral slots for receiving the
pilot means, the intermediate plug sections hav
ing a pair of radially extending disk members for 10
shielding the zone around the radial openings in
The following references are of record in the
?le of this patent:
the bearing portions when assembled in the crank
shaft and ?attened peripheries diametric to the
radial openings in the bearing portions to allow
oil ?ow axially through the openings in the bear
ing portions, and means clamping the plug sec
tions together axially with the pilot means lying
in the peripheral slots in the end sections of the
6. A plug structure for a hollow crankshaft
bearing portion comprising three aligned sections 20
having interlocking stem portions, disk ?anges
extending radially from the remote ends of
said end sections and a pair of disks extend
ing radially from the middle section, said. pair
Fessenden ________ __ Feb. 24,
Green et a1 ________ __ Feb. 24,
Duesenberg ______ __ Sept. 29,
Chilton __________ __ June 19,
Number ,
British ___________ __ Oct. 26, 1934
British ____________ __ Aug. 7, 1924
French ____________ __ Oct. 2, 1925
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