Application of Walter Ernst

305 F.2d 468, 49 C.C.P.A. 1219
CourtCourt of Customs and Patent Appeals
DecidedJuly 18, 1962
DocketPatent Appeal 6806
StatusPublished
Cited by1 cases

This text of 305 F.2d 468 (Application of Walter Ernst) is published on Counsel Stack Legal Research, covering Court of Customs and Patent Appeals primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Application of Walter Ernst, 305 F.2d 468, 49 C.C.P.A. 1219 (ccpa 1962).

Opinions

KIRKPATRICK, Judge.

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the •examiner’s refusal to allow claims 24 through 28 of appellant’s application :Serial No. 507,283, filed May 10, 1955, for “Hydraulic Press and Method of Designing and Manufacturing Thereof.” No claims have been allowed.

The sole reference relied on is:

Ernst 2,672,836 March 23,1954

Claim 24, which is representative, reads:

“24. In a method of manufacturing correlated hydraulic presses; forming a plurality of press heads for the same tonnage capacity that differ only as to side to side and front to back dimensions so that said dimensions form substantially a geometric progression, forming a plurality of press beds for the same tonnage capacity that correspond in side to side and front to back dimensions to said press heads, forming a plurality of press uprights that differ from each other as to height according to a geometric progression and correspond in front to back dimensions to said heads and beds, assembling the heads, beds and uprights to form a plurality of press structures of substantially the same tonnage capacity which differ from each other only as to dimensions that influence the size of the working space of the press, detach-ably mounting a hydraulic motor in each press head, detachably receiving a hydraulic power unit in each head to supply pressure fluid to the motor therein and providing blank-holder and die cushion assemblies adapted for being detachably mounted on the beds of the presses whereby different tonnages and operating speeds may be obtained in a press of the same tonnage capacity.”

Appellant’s application discloses procedures for designing and manufacturing hydraulic presses of different capacity ratings and sizes suitable for different kinds of work. The procedure involves predesigning various parts in a relatively limited number of standardized capacities or sizes, which parts may be combined in various combinations to make available a large number of presses of differing characteristics.

A press construction to be utilized with appellant’s procedure is described in the application as follows:

“ * * * the basic press unit comprises the press head, the press bed, the uprights and strain rods, the fluid tank mounted on the press head, and the main press platen. The hydraulic motor for actuating the platen is detachably mounted in the press head, and thus can be replaced by one of a different type or one of a different size if desired in order to vary the basieing (basic) working characteristics of the press.
“The blankholder assembly, consisting of the blankholder platen, the pickup rods therefor, the blank-holder pulldown rods, and the hydraulic pressure devices for the [470]*470blankholder, forms a unit adapted for ready assembly or ready detachment from the press frame. Similarly, the die cushion or ejector assembly, consisting of the die cushion platen, the ram connected therewith, the cylinder into which the ram extends, and the supporting beams therefor, can be assembled with the press or removed therefrom, depending upon the requirements of the job to be operated on the press.”

In connection with the range of tonnages to be made available, appellant states that the widest selection is desired in the smaller press sizes with fewer models being required in presses of the larger sizes. He discloses establishing a series of tonnages on the basis of a preferred number series,1 referring specifically to the number series consisting of the successive powers of the tenth root of ten. Actual tonnages in a series may be 125, 200, 300, 500, 800, 1250 and 2000 tons, or higher.

Appellant further discloses that, since a low tonnage press is normally operated at a higher speed than a high tonnage press, pressing speeds may be made inversely proportional to the square roots of the tonnages. On the assumption of a constant uniform working pressure for all press sizes, he discloses establishment of that relationship by varying the displacement horsepower with the square root of the tonnage.

According to appellant, his line of basic presses is so designed that each press is adapted for detachably receiving attachments such as low or high tonnage die cushion assemblies and blankholder assemblies. It is stated that the die cushion assemblies follow a preferred number system as to their rated tonnages.

Another aspect of appellant’s procedure is the provision of a range of bed sizes and stroke-daylight combinations so that each press, “in addition to meeting the purchaser’s requirements as to tonnage and function, will also meet his requirements as to physical size.” The application discloses that the parts of the presses governing the dimensions are designed to result in the available dimensions also following a preferred number series, which may be a ten series, as is disclosed for use in connection with the selection of tonnages, or “a twenty series consisting of the successive powers of the twentieth root of ten.”

The Ernst patent discloses a basic press design which is said to be more' subject to modification for a particular job or class of work than presses previously available. That patent discloses-that the press head and cylinder mounted-therein are separate castings whereby the cylinder can be of the exact size necessary to do the work required and full advantage can be taken of the available hydraulic horsepower. It is also stated that the guides, which are mounted on the press uprights, are cut off at the correct length to give the required daylight and stroke combination with the-result that “there is no pattern change- or redesigning of the press necessary in changing the stroke-daylight relationship.”

It is also disclosed that the construction of the Ernst patent permits optional use of certain accessories. Thus, the die cushion or ejector assembly “can be mounted in the press or removed therefrom.” Also, no change in press design is required to add a blank holder if it is wanted in a press, and a blank holder already in a press can readily be removed. The patent further points out that the-blank holder imposes no loading which influences the design of the press frame, with the result that it is unnecessary to redesign the press frame of a three hundred ton press “in order to associate with it a blank holder arrangement with a rating, say, of one hundred tons.”

Another feature of the press of the - Ernst patent is that the pump and its. [471]*471•conduits can readily be removed from the press for repair or replacement.

The Board of Appeals reversed the ex.aminer as to two grounds for refusal of the appealed claims relied on by him; viz., that the claims were improper method claims because of the inclusion ■of recitations of mental steps and that they were drawn to an aggregation. A .refusal to allow all the claims on the ground that they are unpatentable over the Ernst patent was affirmed by the board and that ground is the only one before us.

The board set forth its reasons for affirmance as follows:

“Considering illustrative claim 24 and the Ernst patent we are in accord with the examiner’s views as to the recited method being no more than a description of expected production planning in a large scale plant arranged to produce a line of sueli presses in assorted sizes and tonnage ratings.

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Related

Application of Walter Ernst
305 F.2d 468 (Customs and Patent Appeals, 1962)

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Bluebook (online)
305 F.2d 468, 49 C.C.P.A. 1219, Counsel Stack Legal Research, https://law.counselstack.com/opinion/application-of-walter-ernst-ccpa-1962.