Hydraulic tool release system
AssigneeFCI Americas Technology, Inc.
InventorsJohn D. Lefavour, Armand T. Montminy
Life of this patent
Estimating the term…
Abstract
A hydraulic tool including a frame; a ram movably connected to the frame; and a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure. The hydraulic drive system includes an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system. The automatic release system comprises a first valve which is adapted to be automatically opened by a predetermined hydraulic pressure and a second valve which is adapted to be opened by hydraulic fluid passing through the first valve.
Claims25
A hydraulic tool comprising:
- a frame;
- a ram movably connected to the frame;
- and
- a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure, wherein the hydraulic drive system comprises an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system, wherein the automatic release system comprises a first valve which is adapted to be automatically opened by a predetermined hydraulic pressure and a second valve which is adapted to be opened by hydraulic fluid passing through the first valve, wherein the second valve comprises a second valve seat on the frame, a ball adapted to sit on the valve seat and a pilot spool at the valve seat and adapted to move the ball off of the valve seat.
A hydraulic tool comprising:
- a frame;
- a ram movably connected to the frame;
- and
- a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure, wherein the hydraulic drive system comprises an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system, wherein the automatic release system comprises a first valve and a second valve, wherein the second valve is adapted to be closed by physical contact of the ram against a bumper portion of the second valve.
A hydraulic tool comprising:
- a frame;
- a ram movably connected to the frame;
- and
- a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure, wherein the hydraulic drive system comprises an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system and a manual release system for manually releasing hydraulic fluid from the hydraulic drive system, wherein the automatic release system comprises a first valve and a second valve, and wherein the manual release system is adapted to allow a user to manually move a portion of the first valve or the second valve.
A hydraulic tool comprising:
- a frame;
- a ram movably connected to the frame;
- and
- a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure, wherein the hydraulic drive system comprises an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system, wherein the automatic release system comprises a first valve which is adapted to be automatically opened by a predetermined hydraulic pressure and a second valve which is adapted to be opened by hydraulic fluid passing through the first valve, wherein the automatic release system is configured to close the first valve while the second valve remains open.
Dependencies are inferred from the claim text.