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US 12,290,866 B2Granted
Systems and methods for cutter ram return
AssigneeMilwaukee Electric Tool Corporation
InventorWilliam Kreutter
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention provide systems and methods for ram return in cutting tools. A cutting tool can include a frame, a cutting blade coupled to the frame, and an outer ram coupled to the frame. The outer ram can include a bore to receive hydraulic fluid to provide a first stage of movement for the cutting blade into to a cutting position. The cutting tool can also include an inner ram, an extension spring, a compression spring, or a gas spring to provide a second stage of movement to return the ram and the cutting blade to a non-cutting position.
Claims13
A hydraulic cutter tool comprising:
- a cylinder;
- a first frame;
- a first cutting blade coupled to the first frame;
- an outer ram including an outer bore to receive hydraulic fluid, the outer ram movably received within the cylinder and is coupled to the first frame;
- a conduit tube coupled to the outer ram within the outer bore, the conduit tube including a ram cavity;
- an inner ram including an inner bore to receive hydraulic fluid, the inner ram positioned inside the ram cavity of the conduit tube, and the inner ram including an annular groove;
- a seal positioned in the annular groove so that the seal is positioned within the ram cavity to contact between the conduit tube and the inner ram to prevent leakage between the inner bore and the outer bore;
- and
- a valve fluidly coupled to the inner bore and the outer bore to control a flow of hydraulic fluid so that the inner bore fills with hydraulic fluid before the outer bore to move both the conduit tube and the outer ram in a first direction toward an extended position to actuate the first cutting blade.
6 more elements
Dependencies are inferred from the claim text.