This case arises out of a tragic accident in which plaintiff Ronald Childress lost both legs and a thumb while using a log splitter manufactured by LaFont Log Splitting Company (“LaFont”). The log splitter causing the injury incorporated as a component part a hydraulic valve designed and manufactured by defendant Gresen Manufacturing Company (“Gresen”).
Plaintiffs appeal from the district court’s summary judgment which was based on the premise that a component part manufacturer does not have a duty under Michigan law to analyze the safety of a completed product that incorporates its nondefec-tive component part. Plaintiffs attempt to base their case on two distinct legal theories. First, they claim that the valve was defectively designed, not because it malfunctioned or deviated from its intended operation, but because when incorporated into the log splitter it caused the log splitter to function in an unreasonably dangerous manner. Second, they claim that the valve was negligently supplied to LaFont because Gresen knew or should have known that its incorporation into LaFont’s log splitter would create an unreasonable risk of danger to the user of the log splitter. Before examining the merits of these 'assertions, some background facts must be reviewed. 1
A typical log splitter consists of numerous component parts. The main section of the log splitter is the beam. The beam holds the log in place while the log is being *47 split. At one end of the beam is a wedge. The wedge is a knife-like object that remains in a stationary position. At the opposite end of the beam is a push pad or ram. The ram is a mobile object which moves along the beam toward the wedge. The ram forces the log into the wedge, thereby causing the log to split. The ram is connected to a cylinder. The cylinder obtains its power from a hydraulic fluid pump. A control valve is used to channel the fluid and the cylinder in a desired direction.
An operator activates movement of the ram by depressing one or two control levers, depending on the particular design of the log splitter used. A log splitter is said to have a “deadman’s control” if the ram halts its movement toward the wedge upon release of pressure on the lever(s), whereupon the ram either stops or automatically retracts. The log splitter involved here, like the model manufactured by LaFont prior to incorporation of the Gresen valve, did not have a deadman’s control. 2 Therefore, once the lever was depressed, the ram would automatically extend toward the wedge whether or not the operator continued to apply pressure to the lever. This movement could be interrupted only by manually resetting the lever. Once the ram on the splitter involved here was fully extended, the lever would automatically spring into the reverse position, causing the ram to retract. The lever would then settle in the neutral position.
Ronald Childress was employed by a person in the business of selling firewood. His job assignment for about a month prior to the accident was to split logs. On February 3, 1984, Childress placed a log on the beam of the splitter. After pulling the lever to begin the splitting process, Chil-dress let go of the lever and held the log in place with his right hand so that it would not become dislodged. As the ram moved toward the wedge, Childress’ right thumb became caught between the log and the wedge, causing the thumb to be amputated. He became weak and unstable and fell across the beam. Childress was unable to reach the control lever to stop the progression of the ram. Consequently, the ram continued forward, forcing his legs against the wedge. Childress’ injuries were so extensive that it eventually became necessary to amputate both legs.
Gresen was requested by LaFont to manufacture a valve for use in its log splitter with the following specifications: 1) spring extension; 2) knock-out; 3) pressure setting; and 4) handle location. Gresen assigned the valve the number CP-4119-A to designate that it was made in accordance with LaFont’s specifications. Plaintiffs presented evidence that LaFont’s employees lacked the expertise necessary to supply technical specifications for a valve design, though Gresen’s evidence is uncontra-dicted on the point that LaFont made no request for Gresen to provide any design or safety analysis for use of the valve on a log splitter. The valve as supplied consisted of a spring extended valve, with a hydraulic knock-out positioner added to it. In order to make the cylinder retract after full extension of the ram toward the wedge, Gresen modified the knock-out positioner to cause the valve to return to the opposite power position rather than to neutral. According to testimony by plaintiffs’ expert, the spring extended valve without the addition of a knock-out positioner would have functioned in LaFont’s log splitter like a deadman’s control in that the ram would automatically have ceased its forward movement upon release of the operating lever. The knock-out positioner caused the ram to continue extending toward the wedge even if the operator released the lever. The positioner, as modified for La-Font, also reversed the direction of the ram upon full extension. Prior to working with LaFont, Gresen had supplied spring extended with hydraulic knock-out valves to other completed product manufacturers. Such valves are commonly used in equipment such as fork lift trucks and garbage bin dump trucks.
*48 Plaintiffs make much of the fact that Gresen modified the spring extended valve by adding the altered knock-out positioner prior to supplying it to LaFont. Gresen added the positioner to the valve in order to meet LaFont’s specifications. This does not make Gresen a “designer” of the component part. The uncontradicted evidence shows that a spring extended valve with a knock-out positioner is a distinct component with recognized features that are useful in a variety of applications. The valve Gresen supplied is properly identified as a single unit consisting of a spring extended with knock-out valve. In any event, the fact that an unaltered spring extended valve would cease operation upon release of pressure is not in itself intended to be a “safety feature” of that valve. Removing that characteristic by adding a knock-out positioner (even when the positioner has been modified to facilitate a function unrelated to the automatic progression of the ram toward the wedge) cannot properly be described as destroying a “safety feature” of the valve, as plaintiffs attempt to do.
We also agree with the district court that there is no need to examine this case under two theories, negligent supply and defective design. In a case of defective design, the product has been manufactured in accordance with its intended design but is not sufficiently safe.
Prentis v. Yale Manufacturing Co.,
Therefore, we must examine whether the manufacturer of a component part, supplying the part with knowledge of its ultimate function in an allegedly dangerous finished product pursuant to the design requested by the manufacturer of the finished product, may be liable under Michigan law for negligently supplying that part. In
Jordan v. Whiting Corp.,
In granting summary judgment, the district court distinguished Scott on the ground that liability there
was premised upon a defect in the design of the component part itself, i.e. the failure to incorporate a safety device. No such claim is made in the case at bar. Plaintiffs do not offer evidence to suggest that Gresen improperly designed the *49 spring extension valve or that the valve should have incorporated some safety device. Rather, it is Plaintiffs’ contention that Gresen was negligent in supplying a non-defective component part to LaFont without analyzing the overall design of the completed product.
We observe that there is a marked difference between knowing the identity of the equipment into which a component part will be integrated and anticipating any hazardous operation by that equipment that might be facilitated by the addition of the component part. Indeed, extending the duty to make a product safe to the manufacturer of a non-defective component part would be tantamount to charging a component part manufacturer with knowledge that is superior to that of the completed product manufacturer. The law in Michigan does not go this far. The court in
Jordan v. Whiting Corp., supra,
stated, “The obligation that generates the duty to avoid injury to another which is reasonably foreseeable does not — at least yet — extend to the anticipation of how manufactured components not in and of themselves dangerous or defective can become potentially dangerous dependent upon the nature of their integration into a unit designed, assembled, installed, and sold by another.”
Jordan, supra,
For the reasons stated above, the judgment of the district court is AFFIRMED.
Notes
. We integrate herein the description of a log splitter’s structure and operation set forth in the district court's memorandum order and opinion of July 26, 1988, granting summary judgment. That opinion is reported at
. Several features of the LaFont log splitter were altered when the Gresen valve was added, including the ability to actuate a single automatic cycle of log splitting with one lever instead of two.
