US 12,145,828 B2
Synchronized hybrid clamp force controller for lift truck attachment
Christopher M. Walthers, Gresham, OR (US)
Assigned to Cascade Corporation, Fairview, OR (US)
Filed by Cascade Corporation, Fairview, OR (US)
Filed on Apr. 11, 2023, as Appl. No. 18/298,653.
Application 18/298,653 is a continuation of application No. 17/349,739, filed on Jun. 16, 2021, granted, now 11,655,130.
Application 17/349,739 is a continuation in part of application No. 16/420,000, filed on May 22, 2019, granted, now 11,220,417, issued on Jan. 11, 2022.
Claims priority of provisional application 63/041,014, filed on Jun. 18, 2020.
Prior Publication US 2023/0242388 A1, Aug. 3, 2023
Int. Cl. B66F 9/22 (2006.01); F15B 15/20 (2006.01); B66C 1/42 (2006.01); B66C 3/16 (2006.01); B66F 9/14 (2006.01)
CPC B66F 9/22 (2013.01) [F15B 15/20 (2013.01); B66C 1/427 (2013.01); B66C 3/16 (2013.01); B66F 9/143 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic control circuit comprising:
an input port configured to receive pressurized fluid from a pump and return unpressurized fluid to a reservoir;
a first output port connectable to a first hydraulic actuator and a second output port connectable to a second hydraulic actuator, each of the first output port and the second output port configured to receive pressurized fluid from the input port and also configured to simultaneously deliver said pressurized fluid to its respectively connected hydraulic actuator and receive fluid discharged therefrom; and
a selector capable of selectively causing any fluid discharged into the first output port to be delivered from the second output port; wherein
the first output port and the second output port are each configured to deliver said pressurized fluid from the input port to a respectively connected hydraulic actuator regardless of whether the selector causes fluid discharged into the first output port to be delivered from the second output port.