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:
Jun. 25, 1991
Filed:
Nov. 09, 1990
Applicant:
Inventors:
Pedro P Montaner, Esplugues De Llobregat, ES;
Victor R Turro, Barcelona, ES;
Assignee:
Monturas, S.A., Barcelona, ES;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
222321 ; 417552 ; 222385 ;
Abstract
The pump comprises: a main cylinder (24); a main plunger (12) urged by a first spring (62) and extended by a hollow stem (10) and having a valve seat therein; a secondary cylinder (52) comprised within the main cylinder (24); a secondary plunger (64) urged by a second spring (70) having an upper extension (66) and being provided with a cavity (72) which is closed in the proximity of the end (68) engageable with the valve seat; while it is open at the lower end thereof, maintaining communication with the space (54).