This аction -was brought by the appellant, Micromatic Hone Corporation, for alleged infringement by the appellee, Midwest Abrasive 'Company, of claim 1 of Calvert patent No. 1,908,218 for “Abrasive Stone Holder,” issued May 9, 1933. The stone holder is used in conjunction with honing equipment for finishing internal cylindrical surfacеs such as the cylinder bores of internal combustion engines. The District Judge dismissed the complaint.
Appellant is the owner of the Calvert patent, claim 1 of which is the only claim in suit, and which reads as follows: “A honing element for a grinding tool including, an abrasive element and a metal backing member therefor having upstanding sides which are flanged laterally at their upper ends outwardly from the element.”
Appellant also manufactures and owns patent rights to a honing tool on which these abrasive stone holders are mounted and used. The honing tool is reciprocated and rotated in the cylinder bore with the hоning elements in abrading contact with the walls of the cylinder bore for the purpose and with the result of grinding the bore to a finish size and providing a finished and polished surface.
The tool head is provided with honing element receiving shoes, which are long, narrow, channel-shaped steel members provided with оutwardly presented channels to receive the honing elements. There are usually six of these receiving shoes in each tool head, which are spaced apart about the circumference of the tool head, and arranged so that they may be moved inwardly and outwardly radially with resрect to the center of the tool head. These receiving shoes are permanent parts of the tool and are adapted to receive and hold the honing elements which are covered by the patent in suit.
The abrading stone which forms part of the honing element is a manufacturеd article composed of small particles of abrasive grit, secured together by a vitreous bond and pressed and molded in heat to the desired shape, which is usually long and rectangular. The stone is secured by an adhesive cement in a thin sheet-metal channel, the sides of which extend only part way up the sides of the stone. The ends of the backing member are provided with projections that form hooks by means of which the stone shell unit is secured in the steel receiving shoe which forms part of the honing tool.
The appellant also owns the Jeschke abrasive stone holder patent No. 1,821,518, in which the metal shell in which the abrasive stone is placed was a thin steel or backing member of channel shape with straight sides. Prior to the patent in suit, great care had to be taken to replace the stones in the honing elements before they became worn down to such an extent that the surfаce of the cylinder bore being ground would be engaged by the hardened and ground receiving shoe which would result in scoring the wall of the cylinder. Some stones wore faster than others and some parts of a single stone wore faster than other parts of the same stone. The Calvert patent relates to an improved holder of the abrasive stone in that the edges of the sides of the channel-shaped backing member are flanged outwardly, so that when the stone becomes worn or broken the stone holder will not score the interior of the bore, and is less subject to chatter or vibration.
Appellant does not manufacture abrasive stones, but purchases them from various companies and mounts them in its abrasive stone holders. The abrasive stones are not patented to appellant. Appellant’s honing tools endure many years in operation, but the abrasive stones wear оut in about six hours of continuous use and have to be replaced. Formerly, when the abrasive stone wore out, appellant would purchase back from the customer the abrasive stone holder with the used stone herein for two cents and would then refill the old stone holder with a new stone and agаin sell it to its customer. Later in view of the low cost of the metal stone holder, appellant adopted the practice of mounting each new abrasive stone in a new stone holder. The used stone holder was scrapped.
The infringement charged by appellant in this section is the removing of the old stone from the metal backing member or shell, the reconditioning of the metal backing member, the placing of a nеw stone óf appellee’s manufacture in the old metal backing member, and the resale of the unit to the hone user. Appellee contended in the District Court that it was not infringing, because (1) it was merely replacing a perishable element, unpatented per se, in the combination of claim 1; (2) thаt reconditioning the stone holder was a repair of appellant’s patented product and not reconstruction thereof; (3) that claim 1 of the Calvert patent was invalid because it was'directed solely to the improvement of an element of an old patented combination and appellant had not limited his claim to the improved element, as required by law; (4) that claim 1 of the Calvert patent was invalid because it did not constitute invention; (5) that it was invalid in view of the prior art; and (6) that appellant came into Court with unclean hands because of its efforts to monopolizе the sale of unpatented abrasive stones when used in connection with its patented honing tools and patented stone holders. The judgment as entered did not refer to the last three issues, but merely adjudged and decreed that: (1) Claim 1 of the Calvert patent was invalid because it defined the old combinаtion of the Jeschke patent while disclosing only an improvement of a single element of an old combination without changing the function of the combination; (2) appellee was not infringing because it was supplying a perishable unpatented component only of an old combination; (3) aрpellee was not infringing because it was repairing rather than reconstructing the metal stone holders.
We agree with the ruling of the District Judge that the appellee was not infringing because it was supplying a perishable unpatented component of an old combination. It has long been the established rule that if one of the parts of a patented combination, the part being not patentable per se, is made of soft material and wears out, the other parts of the combination remaining capable of performing their normal and expected functions, the right to replaсe the worn-out part exists quite as definitely as in the case of breakage. Wil
We also think that the District Judge was correct in his ruling that the appellee was not infringing because it was; repairing rather than reconstructing thе metal stone holders. In Wilson v. Simpson, supra, the Supreme Court also held that repairing partial injuries, whether they occur from accident or from wear and tear, is only refitting a machine for use and not reconstruction of a new machine. As stated in that opinion—“It is the use of the whole of that which а purchaser buys, when the patentee sells to him a machine; and when he repairs the damages which may be done to it, it is no more than the exercise of that right of care which every one may use to give duration to that which he owns, or has a right to use as a whole.” See Automotive Parts Co. v. Wiscоnsin Axle Co., 6 Cir.,
Each question of repair or reconstruction must be decided upon its own facts. Keeping in mind that the abrasive stone is not patented, that the dominant element of the invention resides in the flanging of the sides of the stone holder, that appellee does not attempt to straighten out or repair the flanged sides, and that the work done on such shells as are found suitable for refilling is of a minor nature done with pliers and a carpenter’s hammer, the case falls into the class of repair work rather than reconstruction. Goodyear Shoe Machinery Co. v. Jackson, 1 Cir.,
Appellant relies upon Cotton-Tie Co. v. Simmons,
The District Court’s holding that claim 1 of the Calvert patent was invalid was based upоn the ruling of the Supreme Court in Lincoln Engineering Co. v. Stewart-Warner Corp.,
The judgment of the District Court is so modified and affirmed.
