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:
Jul. 08, 1997
Filed:
Apr. 18, 1994
Applicant:
Inventors:
Matthew G Kraemer, Seattle, WA (US);
Richard M Curtin, Redmond, WA (US);
Paul K Smith, Kirkland, WA (US);
Assignee:
Genie Industries, Redmond, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ; B66B / ;
U.S. Cl.
CPC ...
187372 ; 188189 ; 188136 ; 187226 ; 182148 ;
Abstract
Apparatus for braking relative vertical movement between two vertical members includes a ramp mounted on one of the members to oppose a vertical face on the other. If the ramp member accelerates downwardly a wedging roller is wedged between the ramp and the vertical face. This roller is on a slide rod which normally compresses a spring carried at the bottom of the ramp, but downward acceleration on the ramp results in expansion of the spring and movement of the wedging roller into wedging position to stop the acceleration.