US Patent: 3,133,740 - Hydraulic Type Holder for Drill Chucks and the Like


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US Patent: 3,133,740

Hydraulic Type Holder for Drill Chucks and the Like

Patentee:

Albert W. Drantz (exact or similar names) - Norridge, Cook County, IL

USPTO Classifications:

242/571.1, 279/156, 279/4.03, 451/398

Tool Categories:

metalworking machines : metalworking machine mechanisms : hydraulic apparatus

metalworking machines : metalworking machine mechanisms : tool changers and storage mechanisms

Assignees:

Scully-Jones & Co. - Chicago, Cook County, IL

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Nov. 08, 1961
Granted:	May 19, 1964

Patent Pictures:

USPTO (New site tip)
Google Patents
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"Vintage Machinery" entry for Scully-Jones & Co.

Description:

Claim:

A hydraulic type holder for drill chucks and the like comprising, in combination, a generally tubular body, a generally tubular thin-walled shell telescoped within said body to form an annular chamber therebetween, means for conducting fluid under pressure to said chamber to compress said shell radially inwardly and thus permit frictional gripping of a member to be held therein.