×

Dolly stabilizer

  • US 9,987,893 B2
  • Filed: 11/30/2015
  • Issued: 06/05/2018
  • Est. Priority Date: 11/28/2014
  • Status: Active Grant
First Claim
Patent Images

1. A device that prevents a train from fishtailing said device comprising:

  • a stabilizer plate mounted onto a rear end of a trailer frame comprising a vertical dolly tongue stabilizer pin opening for accepting a dolly tongue stabilizer pin, said dolly tongue stabilizer pin opening being formed on a first face of the stabilizer plate, said stabilizer plate further including a second face that includes a chamber that houses a spring-biased piston which includes a piston rod end which extends when actuated to force alignment of a dolly with the trailer frame;

    the dolly tongue stabilizer pin arranged within the dolly tongue stabilizer pin opening and having a shank, said dolly tongue stabilizer pin having a flared cavity into which said piston rod end is driven when said device is activated, said dolly tongue stabilizer pin having an upper bearing and a lower bearing arranged on the shank to allow the dolly tongue stabilizer pin to twist within the dolly tongue stabilizer pin opening when the piston rod end is retracted, said dolly tongue stabilizer pin having an upper end that comprises a yoke and a pair of aligned openings which receive a trailer tongue coupler, a lower end of said shank having threads which receive a locknut to secure the dolly tongue stabilizer pin within the dolly tongue stabilizer pin opening; and

    ,a source of pressurized air which provides air into said piston when fishtailing occurs between the dolly and trailer frame.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×