US Patent: 2,963,298
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| Hydraulically Expanding Thin Walled Tools
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Patentees:
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| Bernard R. Better (exact or similar names) - Chicago, Cook County, IL |
| Richard F. Wharton (exact or similar names) - Chicago, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 16, 1958 |
| Granted: |
Dec. 06, 1960 |
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Joel Havens
"Vintage Machinery" entry for Scully-Jones & Co.
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Description: |
| Claim:
An expanding hydrostatic type holder for a tool or work, comprising a relatively thin expansible shell having one surface thereof cylindrical and the other sur-face tapered, a relatively thick substantially inexpansible body having a tapered surface cooperating with said tapered shell surface to alford tight securement between the shell and body, a recess in said tapered body surface defining an expansion chamber with the tapered shell surface, a bore in said body, passage means connecting said bore and expansion chamber, fluid in said passage means, bore, and chamber, and means in the bore to exert pressure on said fluid for effecting expansion of the shell, said tapered surfaces facilitating assembly of the shell and body and acting to effect longitudinal shifting of the shell on the body upon development of fluid pressure in excess of a predetermined value to relieve such excess pressure. |
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