Rotary clamping apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 5, 2000
Grant Date -
N/A
app pub date -
Oct 31, 1997
filing date -
Nov 6, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An annular piston (4) is inserted into a housing (1) axially movably but unrotatably. A clamp rod (9) is hermetically inserted into a through-hole (4a) of the piston (4). When the piston (4) is lowered by a clamping spring (20), a back pressure is produced in pressurized oil within a second chamber (12) formed below the piston (4). The back pressure pushes an input portion (9a) for clamping provided at a lower end of the clamp rod (9) to a stopper (23) through a bearing (24) and a transmission plate (25). The piston (4) is lowered relatively to the clamp rod (9) at a raised position, whereby the clamp rod (9) is rotated by a converting mechanism (21).
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