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:
May. 26, 1992
Filed:
Jul. 03, 1990
Applicant:
Inventors:
Harold L Hull, Sparks, NV (US);
Terrence W Stevenson, Sparks, NV (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
303-7 ; 303-973 ; 303 40 ; 303 54 ;
Abstract
A pneumatic braking system for a tractor and trailer which delivers air to the trailer substantially first and in a greater amount than to the tractor but which continues to deliver to the tractor until the pressure at the tractor approaches the pressure at the trailer. This gives better control and substantially avoids jack-knifing. A valve is also provided to lessen the time factor of air to the tractor when a greater braking pressure is applied. Also when 'bob-tailing' only substantially 50% of air is delivered to the tractor to prevent over-braking.