Cooling System for Actuator

Abstract

An actuator wherein an internal coolant line or chamber extends through both the housing member and the cover member of the actuator. Each of the coolant chambers terminates in a pair of ports. In one embodiment, an external line connects one of the ports in the housing member with one of the ports in the cover member and the other of the ports in the housing member and the cover member are adapted for coupling to respective external coolant input and output lines respectively. In one embodiment, each of the coolant chambers is a generally U-shaped internal conduit.

1 . An actuator comprising respective housing and cover members including respective coolant lines. 
     
     
         2 . The actuator of  claim 1  wherein each of the respective coolant lines is internal to the housing and cover members and terminates in a pair of ports in the housing and cover members respectively. 
     
     
         3 . The actuator of  claim 2  wherein an external coolant line interconnects one of the pair of ports in the housing member with one of the pair of ports in the cover member. 
     
     
         4 . The actuator of  claim 3  wherein an external coolant input line is coupled to the other one of the pair of ports in the housing member and an external coolant output line is coupled to the other one of the ports in the cover member. 
     
     
         5 . The actuator of  claim 2  wherein an external coolant input line and an external coolant output line are coupled to the pair of ports in the housing and cover members respectively. 
     
     
         6 . The actuator of  claim 2  wherein each of the respective coolant lines is generally U-shaped and includes respective first and second spaced-apart segments terminating in the pair of ports and a third segment interconnecting the lower ends of the first and second segments. 
     
     
         7 . An actuator comprising:
 a housing member including a coolant chamber terminating in a pair of ports;   a cover member including a coolant chamber terminating in a pair of ports; and   an external line extending between and interconnecting one of the ports in the housing member and one of the ports in the cover member.   
     
     
         8 . The actuator of  claim 7  wherein each of the coolant chambers in each of the housing and the cover members includes first and second spaced-apart and generally parallel conduit segments including respective first ends terminating in the pair of ports and respective second ends connected to a third conduit segment extending between the first and second conduit segments. 
     
     
         9 . The actuator of  claim 8  wherein each of the coolant chambers is generally U-shaped.