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Патент USA US3099909

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Aug. 6, 1963
3,099,902
e. A. CARLSON
FLUID PRESSURE OPERATED OSCILLATORY BUFFING HEAD
3 Sheets-Sheet 1
Filed June 1'7, 1960
IN VEN TOR.
6
76
Aug. 6,‘ 1963
G. A. CARLSON
3,099,902
FLUID PRESSURE OPERATED OSCILLATORY BUFFING HEAD
Filed June 17, 1960
3 Sheets-Sheet 2
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INVENTOR.
610V 9. C/Mus ‘M
Aug- 6, 1963
G. A. CARLSON
3,099,902
FLUID PRESSURE OPERATED OSCILLATORY BUFFING HEAD
Filed June 17, 1960
3 Sheets-Sheet 5
~/
INVENTOR.
W H. C??éé' /Vw
BY
5“ ,éi/é
3,g9,90-2
Fatented Aug. 6, 1963
2
equivalent stroke. Although not particularly limited in
34999302
respect to the length of the stroke or the speed at which
it is performed, it is contemplated that such stroke may
BUFFING EEAD
Glen A. Qarlson, 1359 Country Club Drive,
be in length up to or in excess of one foot, and its ra
FLUE PRESSURE OPERATED GSCEJLATGRY
Bloom?eld Hills, Mich.
Filed lune 17, 196i), Ser. No. 36,963
5' Claims. (Cl. 51-33)
pidity may be as desired, although in most instances a rela
tively slow travel of the buf?ng wheel discs across the
workpiece surface will be desired. These factors of
stroke and speed are readily controllable by regulation
of the pneumatic pressure under which the bui?ng head
The present invention relates to improvements in a
polishing 'or bu?ing machine of the oscillatory head type, 10 is caused to oscillate, and the hydraulic checking pres
sure which determines its stroke limits.
i.e., in which a boiling wheel, suitably driven for rotation
In accordance with the invention, the buf?ng head ‘of
at a ‘high speed, is mounted for oscillatory movement about
the invention, generally designated by the reference nu
a given axis, which movement is controlled as to the
meral 10, is sustained by a heavy and massive pedestal
stroke and and rate of operation thereof by ?uid pressure
means.
It is an object of- the invention to provide an oscillatory
bu?ing machine of this type, in which the axis of oscilla
tion is preferably that of an appropriate motor drivingly
connected with a spindle or shaft upon which the buf?ng
wheel is carried for rotation. Thus, the motor may be
base 11, although provisions for mounting the equip
ment from above may also be employed.
As shown in FIGS. 1 and 2, the pedestal 11 is one
which inclines upwardly and rearwardly from its ?oor
support, then extends vertically upwardly in the dorm of
a rigid bracket 12. This bracket has a forward ?at sur
given an appropriately rugged and ?xed mount, as on a
face 13 of substantial height and ‘width, to which is bolted
?oor pedestal or the like, and the oscillating action of the
boiling head and wheel be performed without effect on
or otherwise secured a rear mounting plate 14 for a suit
the motor and such mount.
Another object is to provide an ‘oscillatory buf?ng ma
chine as described, in which the oscillation of the head
and wheel is produced under ?uid pressure actuated
means, preferably a suitable pneumatic cylinder operative
ably rated drive motor 15 for the head 10, the motor
15 constituting 1a part of the head 10, considered gener—
ally. It is desirable that the motor mounting plate 14
be mounted upon bracket 12, as by an adjustable swivel
connection at 14' (FIG. 2) which will permit some de
gree of adjustment, for example up to 15° in either di
rection, about a horizontal axis, and thus permit motor
ly connected with the head to e?ect timed oscillation
thereof under the control of appropriate valving by which 3O 15 and various other ?uid pressure means carried there
?uid pressure is applied to and exhausted from the
cylinder.
Another object is to provide a pneumatic pressure oper
ated machine of this type, with which appropriate hy
by to be adjusted and locked in a ?xed position at an
angle to the horizontal.
In accordance with the invention, the pedestal 11 may
also support, either directly or by means of a welded or
draulic check provisions are associated for the purpose 35 other connection to the motor mounting plate 14, a suit
of controlling the limits of the oscillatory stroke, its speed,
able side bracket, generally designated 16, for the ?uid
and the like.
pressure actuated or governed controls of the present in
vention. As herein illustrated, the bracket provision 16
may comprise a ‘suitable rigid channel bracket 18, to the
rear of which a pair of depending bracket yoke arms 19
are rigidly welded or otherwise secured in parallel rela
More speci?cally, in accordance with the foregoing ob
ject, the improved machine is provided with hydraulic
check devices, which may be individually of well-known
type, on either side of its axis of oscillation, or on either
side of the axis of the drive motor for the equipment, in
tion to one another.
The upper and lower portions of the channel bracket 18
the embodiment thereof illustrated herein. Thus, under
serve as supports for a pair of upper and lower hydraulic
the control ‘of such hydraulic devices acting in the general
manner of dashpots, the speed of swing of the bu?ng head 45 check units, generally designated 20, 21, respectively.
These are conventional dashpot type devices operating
and wheel, under actuation of a pneumatic pressure cylin
through suitable adjustable valve provisions to govern the
der as described above, may be controlled in a cushioned,
rate of stroke of plungers or pistons (not shown) there
anti-shock mmner.
'
in; and it is under the control of the hydraulic check
The foregoing as well as other objects will become
devices 20, 21 that the speed of swing of the oscillatory
more apparent as this description proceeds, especially
when considered in connection with the accompanying
head 10 is determined, and its stroke limited.
The bracket provisions 16 further comprise an angled
drawings illustrating the invention, wherein:
FIG. 1 is 1a view in perspective of the improved ma
upright bracket member 23 received within the top and
bottom ?anges of the channel bracket 18 and projecting
chine of the invention, a bu?ng wheel thereof being in
55 forwardly out of [the latter. The angle bracket 23 serves
dicated in dotted line;
in part as a support for a special swinging mounting plate
PEG. 2 is a "fragmentary view of the machine in side
elevation, showing its basic pneumatic actuating and hy
25, this plate 25 being bolted or otherwise secured rigidly
draulic check control devices as operatively connected to
the buf?ng head of the machine; ‘and
to an oscillatory or swinging housing 26 of the oscilla
tory bu?ing head unit 10. The swinging plate 25, as
FIG. 3 is a view in vertical cross section along a line
bolted or otherwise rigidly secured to the housing 26 to
corresponding to broken line 3—3 of FIG. 2.
The machine of the present invention is one adapted
swing the latter and swing therewith, is provided with a
radially projecting crank bracket 28 adjacent the top
thereof, in the form of a generally triangular plate having
to be associated with appropriate provisions (not shown)
for supporting a workpiece of one sort or another ro
a clevis 29 pivotally connected thereto by a pin 30. The
tatively or for linear motion, or for any combination of 65 clevis 29 is carried on a plunger rod 32 of the upper
motions by which the oscillatory stroke of a rotary buf
hydraulic check unit 20; and the rod 32 may also be
?ng wheel of the machine may best perform the polish
threaded to receive an adjustable stop collar 31 to limit
ing or buffing of the workpiece. 'Ilhe oscillatory stroke
the movement of the rod into the cylinder 20‘.
is of assistance in enabling the usual buffing discs [of
Appropriate hydraulic valve control provisions, such
the bul?ng wheel to enter into all recesses or re-entrant 70 as are illustrated in FIG. 2 and designated 33, are associ
areas of the workpiece, in a manner not as well accom
ated with the valve unit 20, as at 34, so that ‘as the plunger
plished by a bul?ng wheel lacking an oscillatory or
3,099,902
rod moves outwardly of the unit 20, hydraulic ?uid will
be restrictedly bled from the unit 20 to control the speed
of this movement, and accordingly the oscillatory down
ward movement of the bu?‘ing head 10 as a whole about
the pilot axis of the unit, which is the axis of the shaft
of motor I15, as piloted in housing 26.
The ‘angle bracket 23 rigidly supports forwardly thereof
a ?xed mounting plate 34 *of forwardly projecting tri—
4
the arms 19. As shown in FIG. 3, the trunnion bearing
sleeves 60 are releasably secured on the respective bracket
arms 19, as by screws 160, to enable the ready assembly
of the cylinder 54 between the arms. It will be noted
that the overall ‘axial dimension across the trunnions 59
exceeds the inside space of arms 19.
The bulfering wheel of the machine is generally desig
nated W, being shown in ‘dotted line in FIG. 1, since it
angular outline, the plate 34 being suitably secured to
is entirely conventional in character. It is carried on a
a side of the angle bracket 23 by bolts 3'5 or the like. 10 shaft 62 paralleling and outwardly of the shaft of motor
The swinging plate 25 is piloted, for its swing in a ver
15, being appropriately journaled in a housing extension
tical plane, Within the inner side of the mounting plate
63
34 and coaxially of the shaft of motor 15, in a boss 36
The wheel shaft 62 is connected by belts (not shown)
of plate 34.
within the housing extension 63, connected to suitable
For the purpose of mounting the hydraulic check unit 15 multi-sheave pulleys (not shown) on the Wheel shaft
20 for its necessary swing in the action of its plunger rod
62 and shaft of motor 15, in an entirely conventional
32, the cylinder 37' of this unit carries a transverse trun
manner. Likewise, the housing extension 63 is adapted
nion 38 at its forward end, and is pivotally mounted by
for longitudinal adjustment within the housing 26, in
this pin between upright bracket ears 39 ?xedly supported
order to maintain belt tension, being suitably clamped
upon the upper ?ange 40 of the channel bracket 18.
20 rigidly to the latter in an adjusted position, as by means
The lower hydraulic check unit 21 is similarly mounted
of bolts or studs 64. Any suitable provisions may be
upon the lower ?ange 41 of bracket channel 18, where
made to mechanically hold parts or limit motions there
fore corresponding parts will be employed to designate
of relative to one another. Thus, an adjustable set or
corresponding mounting provisions, it being noted that
limit screw 66 may be provided on the belt housing ex
the bracket ears 39 in this case are mounted to depend 25 tension 63 to engage the mounting plate 25 and rigidly
from the channel ‘23. Otherwise, the action is the same,
i.e., when the plunger rod of hydraulic unit 21 moves
outwardly upon clockwise swing of the head 10 in the
upward direction there will be a metered bleeding ?ow
of hydraulic ?uid out of the unit 21 to limit the speed
of such upward swing of unit 10. Hydraulic devices of
this sort are conventional and well known, and readily
available commercially, so that further detailed descrip
tion thereof is deemed unnecessary and super?uous.
For the purpose ‘of mounting the hydraulic check unit
21 to the swinging plate 25, the latter is formed with an
integral depending extension 43 having actuator plates
44, 45 rigidly secured thereto adjacent the bottom
thereof, as by bolts 46. One of the actuator plates 44
is provided with an upward extension nose at 47, to which
the connecting clevis 48 of the plunger rod of hydraulic
unit 21 is pivotally attached.
The plates ‘44, 45 are thus secured on opposite sides of
the depending extension 43 of swinging plate 25, and
hold the housing in desired position. Likewise, the hous
ing 26 may be provided with a limit screw 67 on the top
and/or bottom thereof to engage a ?xed bracket part
and thereby mechanically ‘limit the swing of the head 110
as a whole.
It is seen that the invention provides an improved
?uid pressure actuated and controlled bu?ing machine,
in which a continued oscillatory stroke of the buffing head
10 and its bu?ing wheel W may be had in a desired speed
of oscillation, as well as length of stroke, through the
agency of an improved oneaway pneumatic actuator cyl
inder unit '54, operated under the control of appropriate
pneumatic valving (not shown); with the limits of this
stroke determined ‘and controlled in an anti-shock way
by the hydraulic check units 20, 21, respectively.
The parts are simple, rugged and reliable in character,
and the limiting adjustments are readily and easily made
by unskilled persons through appropriate manipulation
of the respective pneumatic and hydraulic control Valve
adjacent the bottom thereof receive a transverse pin 50 45 means referred to above.
upon which the connector block 51 of a pneumatic plunger
What I claim as my invention is:
52 is pivotally mounted.
The plunger 52 is a component of a pneumatic cylinder
unit, generally designated 54, by which the head 10 has
imparted thereto its oscillatory working movement. The
pneumatic cylinder 54 is provided with air pressure con
necting lines 55, 56, leading respectively to its forward and
1. An oscillatory polishing or bu?ing head, compris
ing a rotary operating tool, :a ?xed support, a drive motor
operatively connected to said tool to drive the same, means
mounting said tool to oscillate relative to said support
about an axis spaced transversely of said tool, said means
extending radially of said axis and said bu?‘ing tool be
rearward ends; and under the control of suitable control
ing mounted adjacent an outward end thereof for rota
valve means (not shown) of an entirely conventional
tion, said mounting means comprising an actuator mem
nature, the plunger 52' is caused to move forwardly or 55 ber pivotally mounted coaxially of ‘said ‘axis of oscilla
outwardly of the cylinder 54 upon application of pneu
tion and connected to said tool for pivotal movement of
matic pressure to the rear {of the latter, i.e., through con
the latter therewith about said axis, a ?uid pressure unit
nection 56, air being voided forwardly of the cylinder
operatively connected to said member to swing the same
through the connection 55.
in one direction of said oscillation, a ?uid pressure check
60
This produces the desired upward and clockwise motion
unit operatively connected to said member in transversely
'of the mounting plate 25, housing 26 and remaining parts
of the bui?ng head unit 10, as controlled by the hydraulic
dashpot checking action at the hydraulic unit 21. Re
o?set relation to the axis thereof on one side of said axis
to oppose said motion of the member, and a further ?uid
pressure check unit operatively connected to said member
verse, counterclockwise and downward swing of the unit
in
transversely offset relation to said axis of the member
is under the weight of its pants, as controlled in timing 65 on the opposite side of the last named axis, said further
by the hydraulic check unit 20 at the top.
In order to support the pneumatic actuating cylinder
54 for its necessary swing in the actions referred to above,
the same is provided with Xa ?xed gimbal ring v58 encir
unit opposing oscillatory motion of said member and tool
in the reverse oscillatory direction.
2. An oscillatory polishing or bu?ing head, comprising
a rotary operating tool, a ?xed support, a drive motor
cling the same midway of its axial length; ‘and this ring 70 operatively connected to ‘said tool to drive the same,
is equipped with diametrically opposed, outwardly pro
means mounting said tool to oscillate relative to said
jecting trunnions 59 (FIG. 3), which are pivotally re
support about an :axis spaced transversely of said tool,
ceived in bearing sleeves 60 applied to the depending
said means extending radially of said axis ‘and said buf?ng
bracket arms 19 adjacent the lower ends thereof, the cyl
tool being mounted adjacent an outward end thereof for
inder 54 thus swinging freely in a vertical plane between 75 rotation, said mounting means comprising an actuator
3,099,902
5
4. The combination with a rotary bu?ing tool having
member pivotally mounted coaxially of said axis of oscil
lation and connected to said tool for pivotal movement
of the latter therewith about said axis, a ?uid pressure
unit operatively connected to said member to swing the
same in one direction of said oscillation, a valve-con
trolled hydraulic check unit operatively connected to said.
member in transversely o?set relation to the axis thereof
on one side of said axis to oppose said motion of the
member; and a further valve-controlled hydraulic check
unit operatively connected to said member in transversely
offset relation to said axis of the member on the opposite
side of the last named axis, said further unit opposing
oscillatory motion of said member and tool in the re
verse oscillatory direction.
3. An ‘oscillatory polishing or buf?ng head, compris
ing a rotary operating tool, a ?xed support, a drive motor
means mounting the same for oscillatory movement about
an axis paralleling and spaced from the rotary axis of the
tool, of means operatively engaging said mounting means
to control said oscillatory movement, comprising a pneu
matic cylinder and plunger ‘device acting on said mount
ing means to produce one directional component of said
oscillatory movement, and a pair of hydraulic cylinder
and plunger devices operatively connected to said mount
ing means on opposite sides of said oscillatory axis, one
10
in a manner to oppose said one component of movement
and the other in a manner to oppose an opposite com
ponent.
5. The combination with a rotary bu?ing tool having
15
means mounting the same for oscillatory movement about
an axis paralleling and spaced from the axis of the tool,
said movement being in a ‘direction transverse of a plane
?xedly carried by said support and operatively connected
through said axes and including a gravity produced di
to said tool to drive the same, means mounting said tool
to oscillate relative to said support about a horizontal
rectional component, of means operatively engaging said
axis spaced transversely of said tool and coaxial with
that of said motor, said means extending radially of said
axis and said buffing tool being mounted adjacent an out
‘ing on said mounting means to produce a non-gravity
ward end thereof for rotation, said mounting means com
prising an actuator member pivotally mounted coaxially
of said axis of oscillation and connected to said tool for
pivotal movement of the latter therewith about said axis,
a valve-controlled pneumatic unit operatively connected
mounting means to control said oscillatory movement,
‘comprising ‘a pneumatic cylinder and plunger device act
produced directional component of said oscillatory move
ment, and a pair of hydraulic cylinder and plunger de
vices operatively connected to said mounting means on
opposite sides of said oscillatory axis, one in a manner
to ‘oppose said gravity produced component of movement
and the other in a manner to oppose the non-gravity pro
to said member to swing the same upwardly in one direc
duced component.
tion of said oscillation, a hydraulic check unit operatively
connected to said member in transversely offset relation 30
References Cited in the ?le of this patent
to the axis of ‘the latter to oppose said upward swing, and
UNITED STATES PATENTS
a further ‘hydraulic check unit operatively connected to
said member in diametrically opposed relation across said
Robinson ____________ __ Nov. 11, 1941
2,26 2, 049
axis to the connection of said ?rst named hydraulic unit,
Dreher _______________ __ July 25, 1944
2,3 5 4, 5 O9‘
35
to said member, said vfurther hydraulic check unit oppos
ing oscillatory motion of said member and tool in the
reverse, downward oscillatory direction.
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