The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2002
Filed:
Oct. 13, 2000
Applicant:
Inventor:
John W. Duckett, Carson City, NV (US);
Assignee:
Barrier Systems, Inc., Rio Vista, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01F 1/300 ;
U.S. Cl.
CPC ...
E01F 1/300 ;
Abstract
A roadway barrier includes a plurality of movable roadway barrier modules forming a barrier chain, hardware for connecting the barrier modules together to form a first length, and a control for resisting increase and decrease of the barrier chain length when the barrier chain is in place on a roadway, and for permitting increase and decrease of the barrier chain length when the barrier chain is raised from the roadway by a transfer machine.