Hydraulic tool with rapid ram advance

Details Hydraulic tool with rapid ram advance Hydraulic tool with rapid ram advance

2006-06-27

2006-06-27

Banks, Derris H. (Department: 3725)

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

C060S481000

Reexamination Certificate

active

07066003

ABSTRACT:
A hydraulic tool including a frame having a hydraulic conduit system; a ram movably connected to the frame; and a multi-speed ram advancement system for advancing the ram in at least two different rates of movement on the frame. The multi-speed ram advancement system includes a hydraulic pump connected to the hydraulic conduit system of the frame; and a conduit tube extending into a hydraulic chamber inside the ram and fixedly connected to the frame. The conduit tube is adapted to conduit hydraulic fluid from the hydraulic conduit system into the hydraulic chamber inside the ram. The conduit tube is axially rotatably connected to the frame and longitudinally stationarily fixed to the frame.

REFERENCES:
patent: 3972218 (1976-08-01), Pawloski
patent: 4339942 (1982-07-01), Svensson
patent: 5778755 (1998-07-01), Boese
patent: 5979215 (1999-11-01), Lefavour et al.
patent: 6446482 (2002-09-01), Heskey et al.
patent: 6564610 (2003-05-01), Lefavour et al.
patent: WO-03/089165 (2003-10-01), None

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