Invention Grant
- Patent Title: Cushioning system for trailer drawbar
- Patent Title (中): 拖车牵引杆缓冲系统
-
Application No.: US14290097Application Date: 2014-05-29
-
Publication No.: US09441696B2Publication Date: 2016-09-13
- Inventor: Zachery McCurter
- Applicant: Premier Equipment, Inc.
- Applicant Address: US OR Tualatin
- Assignee: Premier Equipment, Inc.
- Current Assignee: Premier Equipment, Inc.
- Current Assignee Address: US OR Tualatin
- Agency: Klarquist Sparkman, LLP
- Main IPC: F16F3/087
- IPC: F16F3/087 ; F16F1/44 ; B60D1/02 ; B60D1/24 ; B60D1/50

Abstract:
A trailer drawbar has a housing with a cylindrical outer chamber and a cylindrical inner chamber separated from one another by a stop. First and second compressible bushings respectively fit in the outer and inner chambers. The bushings have aligned bores. A rod extends through the bores in the bushings. One rod end contains an annular base, which abuts the first bushing, and a drawbar eye. The other rod end is threaded. An annular seal is positioned on the rod adjacent to the second bushing. The first bushing has a length and compressibility such that the seal remains entirely within the inner chamber when the first bushing is compressed to a pre-determined level. The second bushing has a length and compressibility such that the first seal is not located completely inside of the inner chamber when the second bushing is compressed up to a second pre-determined level.
Public/Granted literature
- US20150345582A1 CUSHIONING SYSTEM FOR TRAILER DRAWBAR Public/Granted day:2015-12-03
Information query