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Патент USA US2407127

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Sept. 3, 1946.
F. M. ASPIN-
,
' 2,407,127
DRIVING MEANS FOR ROTARY VALVES OF_ INTERNALr-COMBUSTION
ENGINES, COMPRESSORS AND THE LIKE
Filed May 19, 1944
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Sept; 3, 1946.
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F. M. ASPIN
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2,407,127
DRIVING MEANS FOR ROTARY VALVES OF INTERNAL-COMBUSTION
. ENGINES,
" -
Filed May 19, 1944
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COMPRESSIORS AND THE LIKE
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2 Sheets-Sheet 2
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Patented Sept. 3, 1946
2,407,127
UNITED STATES ‘ PATENT‘ OFFICE
2,407,127 ‘
DRIVING MEANS FOR ROTARY VALVES OF
INTERNAL-COMBUSTION ENGINES, COM-p
PRESSORS, AND THE LIKE
Frank Metcalf Aspin, Bury, England '
Application May 19, 1944, Serial No. 536,328
In Great Britain March 12, 1943
'7 Claims.
( Cl. 123-80)
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This invention relates to driving means for ro
tary valves of internal combustion engines, com
pressors and the like and is particularly, but not
are made with a certain clearance to permit rela
tive movement.
The gear wheel I6 is located in a bearing hous
exclusively applicable to rotary valves of the kind
ing which is shown in detail in Figs. 2 and 3
described in the speci?cation of my earlier Pat
and comprises a lower part 2|, adapted to be
ent No. 2,283,594, and in the speci?cations of
secured by bolts 22 (see Fig. 1) to the valve hous
several of my subsequent patents and patent ap
ing [2, and an upper part 23 adapted to be lo
plications in which the complementary gas-seal
cated on and secured to pillars 24 of the lower
ing and bearing surfaces of the rotary valve mem
part by bolts 25. The upper part 23 includes a
ber and its housing are of tapered shape, pref 10 hub 26 which is formed with grooves 2'! to hold
erably conical.
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rubber sealing rings 28 adapted to engage a
In the construction of such rotary valve mech
flange in a cover plate 29. Internally, the hub,
anism as described and illustrated in the speci
26 is adapted at 30 to‘ form a guide and seal for
?cations, of my earlier ‘patents and patent ap
the upper end of the valve stem. A coil spring
plications, the rotary valve is driven by a gear 15‘ 3| surrounds‘the stem, the lower part bearing
wheel, secured to the stem of the valve.
‘
' against said splines, and the upper part bearing
The object of the invention'is an improved
against anv adjustable member 32. This main
construction of driving mechanism for a rotary
tains the desired contact pressure between the
valve.
valve and its housing.
According to the invention driving means are 20
In use, owing to the provision of the bearings
provided for the rotary valve member comprising
' l1 and i8‘ and the clearance at the driving splines
a driving member arranged substantially co
all thrust and lateral stresses at the driving wheel
axially relative to the rotary valve member, bear
it are taken on such bearings and are not trans
ing means for such driving member separate from
mittedto the stem‘of the rotary valve member.
that of the rotary valve member, and comple 25 Also some error of alignment is possible so that
mentary slidably inter-engaging driving parts on
the valve member is permitted relative freedom
the driving member and rotary valve member per
of movement for self-alignment on its bearing
mitting some freedom of self-alignment and axial
surfaces, which freedom of movement is of great
displacement of the rotary valve member rela
value in‘maintaining the efficiency of the com
tive to the driving member and vice-versa.
30 plementary conical gas-sealing and bearing sur
The accompanyingdrawings illustrate the up
faces of the rotary valve member and housing.
per end of an internal combustion engine having
Obviously the splines forming the inter-engaging
driving means for the rotary valve member in
driving parts between the driving member (gear
accordance with one example of the invention
l5) ‘and the rotary valvemember also permit rel-v
in which Fig. 1 is a sectional elevation and Figs. 35 ative axial movement, of the rotary valve member.
2 and 3 are side elevational‘views, some parts
The two parts 2| and 23 of the bearing hous
being omitted and some parts being shown in sec
ing are adapted,‘ to be assembled as a unit with
tion for clearness.
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the bearing‘s‘and gear wheel in situ so that it may
, As shown in the- drawings, the internal com
be ?tted to the engine as unit, and if necessary
bustionengine comprises a piston l0, cylinder ll, 40 removed and replaced by a new unit by means
valve housing l2 and rotary valve member I3, the
‘ only of the screws 22.
complementary bearing and gas sealing surfaces
‘The invention is obviously not limited to all the
of the valve member and housing being conical
and the rotary valve member being substantially
details of construction of the'example above de
scribed. For instance, the construction of the
as described in my prior Patent No. 2,283,594, 45 rotary valve member arid housing may he dif
aforesaid.
ferent ‘from. that described and illustrated and
The valve housing includes bearings at one
di?ere‘nt‘ types of bearings may be used in place
side for a driving shaft l4 carrying, for each
of the combination of plain and anti-friction
bearings above described.
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rotary valve, a helical multi-start driving wheel
[5. Secured to the housing is a bearingassem 50
What I claim is:
bly carrying a complementary gear wheel l6 and
l. A rotary valve assembly for internal com
comprising an upper plain bearing including a
bustion engines, compressors and the like com
bush I‘! secured in the gear wheel l6 and a lower
prising a housing ‘having aconical valve seating,
anti-friction ball bearing l8. The gear wheel l6,
a rotary‘ valve member having a stem part and
which forms the driving member for the rotary 55 a conical head at one end of the stem comple
valve member, is of two-part construction so that
' mentary to‘said conical seating, a pinion hub,
different and most ‘suitable materials may be
longitudinal, internal splines on said hub, exter
used‘ for their respectivefunctions, the hub part‘
nal longitudinal ‘splines on said stem, a pinion on
l9 having splines 20 to engage complementary
said hub, a pair of bearings mounted on said hub
splines on the-stem of the valve. ‘These splines 60 andpiniomsaid hub,‘ pinionand bearings con
2,407,127
3
mounted laterally of said pinion in, said unit,
said splines being directly in mesh and permit
per and lower co-operating parts, means for hold
ing said parts together as a unit, and means on
the lower part for securing the same to said valve
ting relative lateral and axial freedom of move
ment of the said stem and driving pinion so that
the rotary valve member may at all times ?nd
its effective seating position whilst lateral or other
housing.
5. A rotary valve assembly for internal com
bustion engines, compressors and the like com
prising a housing having a conical valve seating,
a rotary valve member having a stem part and
a conical head at one end of the stem comple
mentary to said conical seating, a pinion hub,
thrust on the driving pinion is taken by the
bearings.
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bearings for said driving pinion secured in said
bearing housing, said bearing housing having up
stituting an assembled unit, a driving gear
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2. A rotary valve assembly for internal com
bustion engines, compressors and the like com
prising a housing having a conical valve seating,
a rotary valve member having a stem part and
longitudinal internal splines on said hub, exter
nal longitudinal splines on said stem, a pinion
a conical head at one end of the stem comple
mentary to said conical seating, a pinion hub, 15 on said hub, a pair of bearings mounted on said
hub and pinion, said hub, pinion and bearings
longitudinal internal splines on said hllb, external
constituting an assembled unit, a driving gear
longitudinal splines on said stem, a pinion on
mounted laterally of said pinion in said unit,
said hub, a pair of bearings mounted on said
said splines being directly in mesh and permit
hub and pinion, said hub, pinion and bear
ings constituting an assembled unit, a driving 20 ting relative lateral and axial freedom of move~
ment of the said stem and driving pinion so that
gear mounted laterally‘ of said pinion in said unit,
the rotary valve member may at all times ?nd
said splines being directly in mesh and permit
its effective seating position whilst lateral or
ting relative lateral and axial freedom of move
other thrust on the driving pinion is taken by
ment of the said stem and driving pinions so
that the rotary valve member may at all times 25 the bearings, a bearing housing and an inwardly
projecting flange thereon contacting with the
?nd its effective seating position whilst lateral
upper end of said stem and constituting a guide
or other thrust on the driving pinion is taken
and seal for said stem.
by the bearings, a bearing housing separate from
6. A rotary valve assembly forinternal com
and located on and secured to said valve hous
ing, said bearings for said driving pinion contact 30 bustion engines, compressors and the like com
prising a housing having a conical valve seating,
ing with said bearing housing.
a rotary valve member having a stem part and
3. A rotary valvev assembly for internal com‘
a conical head at one end of the stern comple
bustion engines, compressors and the like com
mentary to said conical seating, a pinion hub,
prising a housing having a conical valve seating,
longitudinal internal splines on said hub, ex
a rotary valve member having a stem part and
ternal longitudinal splines on said stem, a pinion
a conical head at one end or the stem comple
on said hub, a pair of bearings mounted on said
mentary to said conical seating, a pinion hub,
hub and pinion, said hub, pinion and bearings
longitudinal internal splines on said hub, exter
constituting an assembled unit, a driving gear
nal longitudinal splines on said stem, a pinion
on said hub, a pair of bearings mounted on said 40? mounted laterally of v said pinion in said unit, said
hub and pinion, said hub. pinion and bearings
constituting an assembled unit, a driving gear
mounted laterally of said pinion in said unit, said
splines being directly in mesh and permitting
splines being directly in mesh and} permitting
rotary valve member may at all times ?nd its
effective seating position whilst lateral or other
thrust on the driving pinion is taken by the
bearings, and spring means above said splines
bias'ing and maintaining axial alinement of said
relative lateral and axial freedom of movement
of the said stem and driving pinion so that the
relative lateral and axial freedom of movement
of the said stem and driving pinion so that the
rotary Valve member may at all times ?nd its
effective seating position whilst lateral or other
thrust on the driving pinion is taken by the bear
ings, a bearing housing separate from and lo-'
pinion and valve.
cated on and secured to Said valve housing, and
bearings for said driving pinion secured in said
contacts a bearing for said pinion.
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4. A rotary valve assembly for internal coin
bustion engines, compressors and the like com
prising a housing having a conical valve seating,v
a rotary valve member having a stem part and
a conical head at one end of the stem comple
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a rotary valve member having a stem part and
a conical head at one end of the stem comple
bearing housing, said bearing housing ‘having
upper and lower co-operating parts, each of which
,
‘7. A rotary valve assembly for internal com=
bustion engines, compressors and the like com
prising a housing having a conical valve seating,
55 mentary to said conical seating, a pinion hub,
longitudinal internal splines on said hub, exter
nal longitudinal splines on said stem, a pinion
onsaid hub, a pair of bearings mounted on said
hub and pinion, said hub, pinion and bearings
constituting an assembled unit, a driving gear
, mentary to said conical seating, a pinion hub,
longitudinal internal splines on said hub, external
mounted laterally of said pinion in said unit,
said splines being directly in mesh and permit
longitudinal splines on said stem, a pinion on said
ting relative lateral and axial freedom of move;
hub, a pair of bearings mounted on said hub
and pinion, said hub, pinion and bearings con
stituting an assembled unit, a driving gear
mounted laterally of said pinion in said unit, said
splines being directly in mesh-and permitting
relative lateral and axial freedom of movement
of the said stem and driving pinion so that the 70
ment of the said stern and driving pinion so that
the rotary valve member may at’ all times ?nd
its effective seating position whilst lateral or other
thrust on the driving pinion is taken by the
bearings, a bearing housing separate from and
located on and secured to said valve housing,
said bearings for said driving pinion contacting
with said bearing housing, the upper bearing being
on the inner face of said pinion and the lower
effective seating position ‘whilst lateral or other
bearing being on the outer face of said hub below
thrust on the driving pinion is taken by the
bearings, a bearing housing separate from and
FRANK METCALF ASPIN.
located on and secured to said valve housing, and 75 '
rotary valve member may at all times ?nd its
said
pinion.
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