US 12,290,866 B2
Systems and methods for cutter ram return
William Kreutter, Mosinee, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed on Mar. 3, 2022, as Appl. No. 17/686,140.
Claims priority of provisional application 63/156,197, filed on Mar. 3, 2021.
Prior Publication US 2022/0281020 A1, Sep. 8, 2022
Int. Cl. B23D 15/14 (2006.01); B23D 29/00 (2006.01)
CPC B23D 15/14 (2013.01) [B23D 29/002 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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.