JOEL L STAHMER
Engineering in Pennington, NJ
License number
Massachusetts 43303
Issued Date
Apr 25, 2002
Expiration Date
Jun 30, 2018
Type
Structural Engineer
Address
Address
Pennington, NJ 08534
Professional information
Ground Retractable Automobile Barrier
US Patent:
5762443, Jun 9, 1998
Filed:
Feb 26, 1996
Appl. No.:
8/606600
Inventors:
Matthew A. Gelfand - Rockville Centre NY
James C. Herrmann - Rockville Centre NY
John M. R. Fitzgerald - Stony Brook NY
Joseph Vellozzi - Ardsley NY
Joel L. Stahmer - Pennington NJ
James C. Herrmann - Rockville Centre NY
John M. R. Fitzgerald - Stony Brook NY
Joseph Vellozzi - Ardsley NY
Joel L. Stahmer - Pennington NJ
Assignee:
Universal Safety Response, Inc. - Rockville Centre NY
International Classification:
E01F 1304, B61L 2900
US Classification:
404 6
Abstract:
A heavy duty shock absorber system for resisting large forces as may be encountered, for example, in a restraining barrier for a railroad crossing. A concrete bunker with an upstanding concrete-filled steel pipe has a hydraulic, compressive shock absorber mounted on the steel pipe for rotational, axial, and orthogonal movement. Forces applied to the shock absorber always pass through the axis of the steel pipe, thereby maximizing the resistance to the force while minimizing the necessary size of the system. A net is stored in a pit transverse the roadway parallel to the railroad tracks and is raised and lowered as appropriate. Each end of the net is attached to shock absorbing systems of the type described above.