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:
Apr. 13, 1982
Filed:
May. 03, 1979
Applicant:
Inventor:
Richard W Hanson, Spokane, WA (US);
Assignee:
R. A. Hanson Co., Inc., Spokane, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28C / ;
U.S. Cl.
CPC ...
425 59 ; 425 63 ; 425140 ; 425149 ; 425170 ;
Abstract
A concrete pressure monitoring device in an apparatus for continuously forming an elongated monolithic concrete structure within a prepared excavation. The device includes a pressure sensitive membrane exposed to wet concrete between a bottom surface of the excavation and an inner form member of the apparatus. The membrane covers an open end of a fluid filled housing so that variations in concrete pressure adjacent the membrane will flex the membrane to cause displacement of fluid within the housing. A remote indicator responsive to displacement of fluid within the housing is operatively connected to the housing to indicate the concrete pressure variations.