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:
Mar. 28, 1995
Filed:
Apr. 09, 1993
Applicant:
Inventor:
Paul A Richardson, Salisbury, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ; F23J / ;
U.S. Cl.
CPC ...
180 534 ; 15314 ; 60432 ; 60469 ; 97136 ; 180 538 ; 296 26 ;
Abstract
A power vacuum truck having a movable roof to accommodate expanding vacuum bags, and a method of raising the roof are disclosed. The power vacuum truck utilizes a hydraulic pump to drive a fan and compressor in order to eliminate mechanical linkages and the concomitant breakdown and maintenance associated therewith, and eliminates holes in the roof previously necessary to accommodate the expandable vacuum bags. An vehicle having an automatic transmission can be used.