US Patent: 2,338,624
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| Elevating Mechanism for Machine Tool Knees
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Patentee:
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| Frank W. Curtis (exact or similar names) - Springfield, Hampden County, MA |
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Patent Dates:
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| Applied: |
Mar. 08, 1940 |
| Granted: |
Jan. 04, 1944 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Van Norman Machine Tool Co.
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Description: |
| Original application 08 Mar 1940, now patent #2,301,525, dated 10 Nov 1942. Divided and this application 27 Nov 1940.
This patented elevating mechanism is similar to that used on the Van Norman Models 26, 36, 28, and 38.
Abstract:
One object of the invention is to improve the knee structure so 'as to give improved stability and guidance to the elevating mechanism and so that the elevating mechanism itself will contribute to the stability of the knee. A further object is to improve the drive and stability of operation of the knee to the end that smooth operation and freedom from chatter will be present even when the elevating mechanism is driven at a rapid traverse rate. A further object is to provide a construction of knee elevating mechanism in which the telescopic parts extending between the vertically movable knee and base will have a maximum protection against dirt and metal chips. A further object is to provide a construction which will prevent leakage of oil from the interior of the knee when, as is preferable, the knee acts as an oil reservoir for the gearing contained in it.
Claim:
A knee structure for milling machines and the like comprising a frame, a hollow knee vertically movable on the frame, a vertical splined shaft journaled for rotation upon the frame and having a free end extending upwardly into the knee, a gear splined to the shaft, distributing gearing within the knee coupled to said gear, and a tubular member having a closed upper end and secured to said gear in position to completely enclose that part of the splined shaft above the gear and within the hollow knee to form an oil seal, said closed upper end being remote from the gear a distance substantially corresponding to the maximum vertical travel of the knee. |
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