Chicago Pneumatic Tool Co. v. Hughes Tool Co, 192 F.2d 620, 10th Cir. (1951)
Chicago Pneumatic Tool Co. v. Hughes Tool Co, 192 F.2d 620, 10th Cir. (1951)
Chicago Pneumatic Tool Co. v. Hughes Tool Co, 192 F.2d 620, 10th Cir. (1951)
2d 620
1,865,706; of all claims of Reed patent No. 1,997, 345; of claims 35, 36, 37,
and 42 of Reed patent No. 2,047,110; of claims 1, 2, 3, 4, 8, 9, 10, 11, and 12 of
Reed patent No. 2,058,624; and of claims 5 and 7 of Reed patent No.
2,065,742. All of these patents likewise relate to cone drills or cone cutters for
use in the drilling of deep wells for oil and gas. By reply to the counterclaim,
invalidity of the patents and non-infringement were pleaded as defenses. The
court found that the respective claims of the several patents pleaded in the
complaint were valid; that they had been infringed; that there had not been any
insufficiency of patent markings; that there had been no misuse of the patents;
and that Hughes was not precluded from recovering on account of laches or
estoppel. In respect to the counterclaim, the court found that the respective
claims of the several patents pleaded therein had not been infringed; and that if
such claims be construed in such manner as to bring the Hughes structures
within their scope, they would be invalid for anticipation and lack of invention.
The court entered judgment enjoining Pneumatic from continuing its acts of
infringement; awarding damages for infringement of the Scott and Garfield
patent, the Scott patent, and the Garfield and Scott patent; appointing a master
to ascertain and report the amount of such damages; reserving for jury trial later
the question of damages for infringement of the Fletcher patent in the event the
court should first determine that such patent was valid and had been infringed;
and dismissing the counterclaim. 90 F.Supp. 845. Pneumatic appealed.
2
It is urged with emphasis that the respective claims of the several patents
pleaded in the complaint are invalid. This is not the first attack made upon
these patents on the ground of invalidity. Every claim involved here has been
previously challenged on that ground. Some of them have been sustained by the
Court of Appeals of the Fifth Circuit, some have been sustained by this court,
and some have been expressly upheld by both courts. Williams Iron Works Co.
v. Hughes Tool Co., 10 Cir., 109 F.2d 500; Robertson Rock Bit Co. v. Hughes
Tool Co., 5 Cir., 176 F.2d 783, certiorari denied, 338 U.S. 948, 70 S.Ct. 487, 94
L.Ed. 585, petition for rehearing denied, 340 U.S. 923, 71 S.Ct. 355, 95 L.Ed.
666, second petition for rehearing denied, 340 U.S. 939, 71 S.Ct. 487, 95 L.Ed.
678; Williams v. Hughes Tool Co., 10 Cir., 186 F.2d 278, certiorari denied, 341
U.S. 903, 71 S.Ct. 612, 95 L.Ed. 1342, petition for rehearing denied, 341 U.S.
934, 71 S.Ct. 802, 95 L.Ed. 1362, second petition for rehearing denied, 341
U.S. 956, 71 S.Ct. 1013, 95 L.Ed. 1377. In view of the painstaking care with
which the question of validity of such claims was considered in the cases to
which reference has just been made, there is no need to explore the question
anew, patent by patent, or claim by claim. To do so, would merely extend the
length of this opinion without serving any useful purpose. But in this
connection, one ground of attack upon the Garfield and Scott patent No.
2,030,442, not determined in any of the earlier cases, merits discussion. It is
said that this patent is invalid for prior invention as shown in Harrington patent
No. 2,000,076. The application for the Harrington patent was filed October 3,
1932, and the patent was issued May 7, 1935. The application for the Garfield
and Scott patent was filed October 28, 1933, and the patent was issued
February 11, 1936. Pneumatic introduced evidence tending to carry the
Harrington invention back to March 15, 1932. But the court found upon
evidence adequate to support the finding that Garfield and Scott conceived the
invention disclosed and claimed in their patent in the middle of December,
1931; that they reduced it to practice by February 6, 1932; and that they
diligently continued development of it until commercial production began in
August, 1932. The rule to be applied in a contest between two or more rival
inventors whose applications for patent are pending at the same time is that the
one who first conceives the invention and exerts reasonable diligence in
perfecting it and reducing it to practice is the first inventor. Willard v. Union
Tool Co., 9 Cir., 253 F. 48. Since Garfield and Scott conceived their invention
prior to the filing of the application for the Harrington patent, or any date of
invention claimed for Harrington, they were the original inventors and
therefore the patent issued to them is not invalid for prior invention as shown in
the Harrington patent. In the light of the previous cases determining that the
respective claims in the several patents were valid, supplemented by the views
just expressed with respect to Garfield and Scott being prior inventors over
Harrington, we have no difficulty in reaching the conclusion that the attack
upon the validity of the respective claims of the several patents pleaded in the
complaint is without merit.
3
It was the view of the trial court that the type E bit manufactured and marketed
by Pneumatic infringes all of the respective claims of the several patents
pleaded in the complaint. Pneumatic concedes that if Scott & Garfield patent
No. 1,983,316 is valid, it is infringed. It is argued briefly that the bit does not
infringe Scott patent No. 2,011,084, or Garfield & Scott patent No. 2,030,442.
But we are unable to share that view. It is clear that the bit responds to the
respective claims of these two patents presently in issue. With respect to
Fletcher patent No. 1,856,627, claims 1 and 3 each include as an element teeth
on the cutters of approximately the same size. The teeth on the type E bit are
not substantially uniform or equal in size. Some are approximately twice as
long as others. That difference between claims 1 and 3 of the patent and the
accused structure is substantial and therefore it cannot be said that the structure
infringes such claims. But claim 2 is completely silent in respect to uniformity
or sameness in size of the teeth, and the accused structure does infringe that
claim. The patent has expired. No question is presented in respect of present or
future infringement of it. And since the accused bit did infringe claim 2 during
the life of the patent, the rights of the parties on the accounting will be the same
Pneumatic contends that Hughes should not prevail for the reason that it has
misused the patents on which it relies. The argument in support of the
contention is that while in form Hughes leases its drilling devices with title
reserved and exacts a commitment on the part of each lessee to return the
device when its useful life has ended, the transactions are in reality sales; that
after receiving its full reward, Hughes objects to legitimate repair of the
devices; and that it has filed numerous suits against others for retipping worn
teeth on cones. It is said that in this manner, Hughes has extended the
monopoly of the patents beyond their permitted scope. This contention was
pressed and rejected in Robertson Rock Bit Co. v. Hughes Tool Co., supra, and
in Williams v. Hughes Tool Co., supra. On the authority of those cases, and
without reiteration or amplification of that which was said in them, we fail to
find merit in the contention.
Pneumatic urges the further contention that Hughes is barred by laches and
estoppel from asserting any rights under any of its patents in suit. It is argued
that Hughes led Pneumatic to believe that it did not consider the type E bit an
infringement of the Hughes patents and would not sue for infringement based
upon the manufacture and marketing of such bits; and that in reliance thereon,
Pneumatic spent more than $400,000 in the expansion of its facilities for the
manufacture of bits of that type. To support the argument that Hughes led
Pneumatic to believe that it did not consider the type E bit an infringement of
the Hughes patents and would not sue for infringement based upon the
manufacture and marketing of such bits, reliance is placed upon certain
statements made by Hughes in its brief filed in an action between these same
parties pending in the United States Court for Delaware, upon certain
statements contained in its brief filed in the case on appeal to the Court of
Appeals for the Third Circuit, and upon certain statements contained in its brief
filed in the Supreme Court in opposition to the granting of certiorari in the case.
The critical statements in the three briefs were substantially the same. There
was no material difference between them. The pertinent part of the brief filed in
the Court in Delaware and the pertinent part of the brief filed in the Court of
Appeals for the Third Circuit were considered in Chicago Pneumatic Tool Co.
v. Hughes Tool Co., 10 Cir., 180 F.2d 97, certiorari denied, 340 U.S. 816, 71
S.Ct. 46, 95 L.Ed. 600; and it was there held in effect that such statements
failed to support a charge of deception or misrepresentation. We think that the
statements could not reasonably have been construed as intended to constitute
vertical axis. The spindle has an annular groove in its surface at a depth
approximately equal to the width of the segmental piece measured along the
radius thereof enabling the segmental piece to lie within the groove of the
spindle so as to permit the cutter shell to thrust axially into place on the spindle.
In the act of placing the cutter on the spindle its wall at the small end of the
cone engages a plunger member and forces it inwardly parallel with the axis of
the spindle. That stresses a spring which bears at its inner end upon a cup form
having a conical end adapted to go between and force radially outward a
plurality of plungers or pins which at their outer ends bear upon the segmental
locking pieces. Power stored in the spring as a consequence of thrusting the
cutter axially along the spindle exerts itself to force the conical pin or member
between the inner ends of the plungers which are moved radially outward and
thus the segmental locking pieces are moved radially outward to enter the
groove in the cutter shell, the outward movement being arrested by the outer
edge of the segment coming against the bottom of the groove in the shell. In
thus assembling the cutter with the spindle, the locking means is set to hold the
cutter on the spindle as a consequence of placing the roller in working position
on the spindle. The spreader pins or plungers bear upon the segmental pieces
about midway of their length and maintain them in position against
circumferential displacement. Instead of mounting the cutter on the spindle
without a wear piece or bushing, the use of wear pieces or bushings between
the cutter and the spindle is preferred. The wear pieces or bushings are split
into halves and are placed on the spindle back of the shoulder or wall defining
the front part of the spindle and are spaced apart therefrom so that the front
edge of the bushing forms virtually a continuation of the inner wall of the
spindle groove. The bushing is provided with a conical bearing surface or
portion, and the cutter shell has a bore or recess flared to provide an inclined
bearing wall to bear upon the conical or inclined face of the bushing to sustain
the thrust of the cutter. Some of the claims asserted to have been infringed
expressly call for a bore and flaring counterbore near the base of the cone, and
means for holding the cutter irremovably on the spindle, such locking means
including a member movable radially of the spindle and operating means for
such member housed within the spindle. Unlike the teachings of this patent, in
the Hughes structures the cutters are retained on their shafts by a rolling ballbearing arrangement. And the locking means may be removed by drilling out
the plug, removing the balls, and then removing the cutter from the spindle.
The Hughes bits do not employ ring segments adapted to lie initially in a
spindle recess and be pressed outwardly from the spindle by means of springs
or plungers. They do not have a bore and flared counterbore near the base of the
cone. And they do not have locking means inaccessibly and permanently
enclosed in the cutter which hold the cutter irremovably to the spindle. These
differences are broad and distinctive and for that reason it cannot be said that
any structure manufactured and marketed by Hughes does substantially the
same thing in substantially the same way as that taught in the patent.
9
Reed patent No. 1,997,345 relates to a rock bit. The several claims in the patent
delineate in varying language a bit in which the spindle rather than the ends of
the roller bearings take the end thrusts outwardly from the rotation of the
conical cutter. In the structures manufactured and marketed by Hughes,
clearance is provided at the shoulder between the cutter and the spindle.
Differing from the patent, the end thrust in the Hughes bits is taken by the end
of the roller bearings. Moreover, the application for the patent was originally
filed in 1932. The Patent Office required division; and in 1934, a divisional
application was filed which matured as the patent presently under
consideration. Prior to November, 1934, no claims in either the original
application or the divisional application blueprinted a bit in which the spindle
takes the end thrusts and relieves the rollers of that function. That feature was
added to the claims more than two years after Hughes had begun the
manufacture and marketing of cutters substantially the same in respect of that
element as the ones now said to infringe the patent, more than two years after
such cutters were in public use, and after Reed had seen one or more of them.
An applicant for a patent cannot enlarge his pending application in such
manner as to embrace and include for the first time the essential elements of an
article, device, or structure which has been in public use more than two years.
A patent obtained in that manner does not represent patentable invention. It is
mere appropriation of the inventive skill of another. Railway Co. v. Sayles, 97
U.S. 554, 24 L.Ed. 1053; Schriber-Schroth Co. v. Cleveland Trust Co., 305
U.S. 47, 59 S.Ct. 8, 83 L.Ed. 34; Hazeltine Research v. General Motor Corps.,
6 Cir., 170 F.2d 6, certiorari denied, 336 U.S. 938, 69 S.Ct. 750, 93 L.Ed. 1097.
The bits manufactured and marketed by Hughes do not infringe this patent; but
if the claims of the patent may properly be construed as sufficiently broad to
bring within their scope the structures alleged to infringe, the claims are invalid
for prior public use of devices embodying the essential elements of the asserted
invention.
10
surfaces on the spindle, and floating means rotatively locking the cutter on the
spindle. And claim 42 calls for a cutter assembly comprising a roller cutter
having an annular frictional bearing surface directly engaging a surface on a
spindle, the spindle having a free end separately formed and the other end of
the spindle being integral with its support, floating retaining elements between
the cutter and the spindle, such elements bearing on the spindle portion integral
with its support and projecting beyond the spindle into a groove formed in the
cutter, and roller bearings positioned between the spindle and the cutter. It is to
be noted that in each claim one element is floating means between the cutter
and the spindle for retaining the cutter rotatively on the spindle. In substantial
departure from these claims in the patent, the Hughes devices do not employ
floating means or floating elements between the cutter and the spindle for
retaining the cutter rotatively on the spindle. The accused structures
manufactured and marketed by Hughes employ a row of balls as a retaining
element. But if the claims in the patent may properly be construed as broad
enough to bring within their scope the roller ball arrangement in the accused
structures, the patent is anticipated by earlier Hughes structures.
11
Reed patent No. 2,058,624 relates to an arrangement for retaining the cutter on
the spindle of a drill bit. This patent has never been used. No device or structure
has ever been manufactured and sold under it. The charge of infringement is
limited to claims 1, 2, 3, 8, 9, 10, 11, and 12. It is said on behalf of Pneumatic
that invention in these claims resides in providing a conical cutter rock bit in
which the balls take end thrusts and the rollers take the radial load at the base
of the cutter. As stated in the patent, one object of the invention is to provide a
rolling bearing raceway, or raceways, between the cutter and the spindle which
does not necessitate the weakening of any parts to provide for the insertion of
the rolling elements into their operative positions. A further object is to reduce
the friction between a retaining ring and that portion of the spindle on which
the ring rotates. And still a further object is to take up the thrusts between the
cutter and its spindle by means of antifriction bearings. And as explained,
rollers and balls are mounted within smooth raceways devoid of any openings
tending to weaken either the spindle or the cutter. A retaining ring is employed
normally rotatable with a cone cutter but removable therefrom, such ring
engaging locking elements disposed within an annular recess in the spindle.
Rollers are inserted between the ring and the spindle, the rollers preferably
being in the form of cylinders having axes parallel to the spindle axis. For
locking the cutter on the spindle in such manner that it will be retained in
proper position relative to the bit head and yet be capable of free rotative
movement about the spindle, floating segments are mounted in a groove on the
spindle, of such external diameter as to project from the spindle and thus
provide in effect an annular rib or shoulder. The portion of the bore in the cutter
adjacent the rib or shoulder made up of the segments is formed to fit the rib. At
the large or rear end of the bore of the cutter a ring is mounted, this being
connected with the cutter member by a screwthread, so that the ring turns with
the cutter. In order to reduce friction between the screw ring and the spindle,
rollers are mounted within the reduced portion of the groove on the spindle,
which lies between the base plate and an annular flange. The cutter near its
closed end is provided with a cylindrical bearing portion engaging the free end
of the spindle and serving as a centering means of keeping the axis of the cutter
in proper alignment with the spindle axis. Adjacent to the bearing portion, the
cutter is provided with a radial wall and cylindrical wall. Ball bearings engage
both of these walls as well at two complementary surfaces on the spindle
comprising the bearing portion and a shoulder. And by virtue of the
engagement of the balls with the four surfaces, the balls are capable of resisting
thrust components on the cutter in the direction of its axis and at right angles
thereto. In varying language, the several claims in suit call for rolling bearings
interspersed between the cutter and the spindle, and means for removably
holding or locking the cutter on the spindle. Differing from the disclosures of
the patent, the Hughes structures do not employ floating segments as a means
of retaining the cutters on their spindle. Instead, the Hughes structures employ
ball bearings which are inserted through the inside of the spindle and they serve
as locking means as well as bearings.
12
Reed patent No. 2,065,742 has not been used. No devices or structures have
been manufactured and marketed under its protection. The alleged infringement
is limited to claims 5 and 7. Other claims are not involved. Claim 5 delineates a
roller cutter comprising a spindle support, a spindle projecting at right angles
therefrom, the spindle comprising a portion of large diameter integral with the
support and a portion of reduced diameter projecting from the first mentioned
portion and having a free end cutter, a cutter enclosing the spindle, the cutter
having rows of teeth in a frusto-conical zone and having rows of teeth in
another zone tapered with respect to the frusto-conical zone, a plurality of
bearing means between the cutter and the spindle and adapted to support the
cutter without direct contact between the interior surface of the cutter and the
peripheral surfaces of the spindle portions, and bearing means comprising
rolling bearings between the cutter and the large diameter portion of the spindle
and comprising a bearing sleeve surrounding and fitting the spindle portion of
reduced diameter, the sleeve being surrounded by the frusto-conical zone and
the rolling bearings being surrounded by the tapered zone, whereby the bearing
means cooperate to sustain radial thrusts from both cutter zones. And claim 7
calls for a roller cutter arrangement comprising a spindle support, a spindle
portion integral therewith and projecting at right angles therefrom, the spindle
portion providing a raceway for ball bearings, another spindle portion of
reduced diameter projecting from the first mentioned spindle portion and
having a free end, a cutter enclosing the spindle portions, a plurality of bearing
means between the cutter and the spindle portions, one of which comprises
balls mounted in the raceway and cooperating with a groove in the cutter to lock
the cutter rotatively on the spindle portion of large diameter and another of
which comprises a bearing sleeve surrounding and fitting the spindle portion of
reduced diameter, such bearing means cooperating to space the cutter normally
out of direct contact with the peripheral surfaces of both spindle portions, the
open end of the cutter having clearance preventing contact between the cutter
and the spindle support. The application for the patent was amended by adding
claims, two of which became claims 5 and 7 of the patent as finally issued. The
specification referred to the removable portion of the spindle as the terminal
spindle section. In the added claims which became claims 5 and 7 no reference
is made to a terminal spindle section. These claims brought into the patent as an
element a bearing sleeve surrounding and fitting the spindle portion of reduced
diameter. For more than two years prior to the filing of the added claims, two
of which became claims 5 and 7 of the patent, bits manufactured and marketed
by Hughes of the general type now charged to infringe the patent had been in
wide public use. And furthermore, Schlumpf patent No. 2,104,819 discloses the
invention claimed in claims 5 and 7 of the Reed patent. The original application
for the Reed patent was filed September 7, 1933. The added claims, two of
which became claims 5 and 7, were filed May 8, 1936. And the patent was
issued October 27, 1936. The application for the Schlumpf patent was filed
March 9, 1935. And the patent was issued January 11, 1938. Thus, the
applications for the two patents were pending at the same time. But the record
before us indicates clearly that the application for the Schlumpf patent was
executed prior to any effective assertion or disclosure on the part of Reed of the
critical patentable novelty claimed in claims 5 and 7. If claims 5 and 7 of the
Reed patent be construed as broad enough to bring within their scope the
accused structures manufactured and marketed by Hughes, they are invalid for
anticipation.
13
Complaint is made that the court denied the demand of Pneumatic for a jury
trial upon the issues of validity and infringement of Fletcher patent No.
1,856,627. The complaint alleged among other things past infringement of this
patent, continuing infringement, future infringement unless enjoined, and
damages. The prayer was for injunctive relief to prevent future infringement,
and damages for past infringement. After issue had been joined and while the
cause was pending in the trial court, the patent expired. Nine days after such
expiration the demand for trial by jury was filed, accompanied by an
explanation that the patent had expired less than ten days previously. The court
denied the demand in respect to the questions of validity and infringement, but
Finally, error is assigned upon the action of the court in denying the demand of
Pneumatic for trial by jury of the issues of validity, infringement, and damages
as to Reed patent No. 1,835,523. With respect to all of the patents pleaded
therein, the counterclaim alleged past infringement, infringement in the future
unless enjoined, and damages. The prayer in conventional language was for an
injunction to prevent future infringement and damages for past infringement.
After issues had been joined and while the cause was pending for trial, patent
No. 1,835,523 expired. Thereafter, Pneumatic filed an amendment to its
counterclaim. The amendment related solely to the prayer in the counterclaim;
and the prayer was unchanged except as to this particular patent. In respect to
such patent, the amendment limited the prayer to damages for past
infringement. The amendment was accompanied by a demand for a trial by jury
of the issues of validity, infringement, and damages as to that patent. In a single
order, the court allowed the amendment and granted the demand for trial by
jury only on the question of damages in the event the court should previously
determine that the patent was valid and infringed. Reply in the nature of an
answer to the counterclaim having been filed, the counterclaim could be
amended only with leave of the court. Rule of Civil Procedure 15(a), 28
U.S.C.A. And it lay well within the range of sound judicial discretion of the
court to allow the amendment in toto, to deny it altogether, or to permit it with
reasonable conditions and limitations. Construing as a harmonious whole the
parts of the order relating to this particular patent, the effect of the order was to
allow the amendment to the counterclaim but at the same time and as a part or
condition thereof to limit to trial by jury the issue of damages if validity and
infringement were first found by the court. And inasmuch as it was within the
power of the court to deny the amendment altogether, or to permit it with
reasonable conditions and limitations attached, Pneumatic cannot be heard to
complain that it was allowed only in part, trial by jury being limited to the issue
of damages in the event validity and infringement were first determined by the
court.
15