Railway hydraulic stabilizer

Abstract

A hydraulic stabilizer for a railway freight car truck, the truck having a bolster and side frames each respectively supporting at least one railway axle/wheel set. The hydraulic stabilizer being contained within the area of the spring set between the bolster and the side frame, and having a working cylinder and piston contained within a housing. The device having a rod seal affixed intermediate said cylinder and said piston; and an oil seal affixed intermediate said cylinder and said piston. The oil seal having at least two lip profiles extending radially inward to said cylinder.

1 . A hydraulic stabilizer for a railway freight car truck, the truck comprising a bolster and side frames supporting at least one railway axle/wheel set, the hydraulic stabilizer being contained within the area of the spring set between the bolster and an side frame, said hydraulic stabilizer comprising:
 a housing;   said housing having a hydraulic fluid reservoir;   a hydraulic cylinder at least partially contained within said housing;   a working piston generally aligned within said cylinder having a piston rod for axial movement within said cylinder to dampen relative movement between said bolster and said side frame;   an oil seal affixed intermediate said cylinder and said piston rod; and   said oil seal having at least two lip profiles extending radially inward of said cylinder.   
     
     
         2 . The hydraulic stabilizer for a railway freight car truck of  claim 1  further comprising said seal having an outer lip seal disposed on an outer surface of said seal generally radially opposite one of said two lip profiles. 
     
     
         3 . The hydraulic stabilizer for a railway freight car truck of  claim 2 , further comprising said seal having a resilient expander. 
     
     
         4 . The hydraulic stabilizer for a railway freight car truck of  claim 3  having an anti-extrusion ring positioned on said seal axially outward of said two lip profiles. 
     
     
         5 . The hydraulic stabilizer for a railway freight car truck of  claim 1  further including a rod wiper in said cylinder axially outward of said seal. 
     
     
         6 . The hydraulic stabilizer for a railway freight car truck of  claim 5  further comprising said wiper having a resilient lip extending upward and inward; and said wiper including a J-shaped reinforcing member. 
     
     
         7 . The hydraulic stabilizer for a railway freight car truck of  claim 6  wherein said reinforcing member includes a hook portion extending into said wiper and a vertical portion of said J-shaped reinforcing member positioned radially outward of said lip and circumferential about said wiper. 
     
     
         8 . The hydraulic stabilizer for a railway freight car truck of  claim 7  wherein said wiper includes a valley in said wiper separating said lip from said reinforcing member. 
     
     
         9 . The hydraulic stabilizer for a railway freight car truck of  claim 4  further including a rod wiper in said cylinder axially outward of said seal. 
     
     
         10 . The hydraulic stabilizer for a railway freight car truck of  claim 9  further comprising said wiper having a resilient lip extending upward and inward; and said wiper including a J-shaped reinforcing member. 
     
     
         11 . The hydraulic stabilizer for a railway freight car truck of  claim 10  wherein said reinforcing member includes a hook portion extending into said wiper and a vertical portion of said J-shaped reinforcing member positioned radially outward of said lip and circumferential about said wiper. 
     
     
         12 . The hydraulic stabilizer for a railway freight car truck of  claim 11  wherein said wiper includes a valley in said wiper separating said lip from said reinforcing member. 
     
     
         13 . The hydraulic stabilizer for a railway freight car truck of  claim 5  wherein said piston rod has a finish generally equal to the range of #2 and #3 RMS.