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. 04, 1993
Filed:
Apr. 01, 1991
Applicant:
Inventor:
Richard G Bisker, Salisbury, MD (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
222189 ; 222563 ; 210234 ; 210418 ;
Abstract
An apparatus for isolating an underground piping system from dispensers having a filter assembly. The isolation apparatus includes a seal member and a securing member which replace an in-line filter assembly. The seal member has a similar cross-sectional shape of the filter with a pair of inner and outer seals. The securing member is receivable on a nipple adapter that the filter assembly was received on and abuts the back portion of the seal member to engage the seals against an outlet conduit of the underground piping system.