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. 17, 1998
Filed:
Dec. 20, 1995
Michael A Laskaris, Collegeville, PA (US);
Glenn D Quinty, Harleysville, PA (US);
Hale Fire Pump Company, Conshohocken, PA (US);
Abstract
A pump for use in additive systems such as foam chemical additive systems for fire fighting water, the pump including impeller elements and flow meter elements in a common casing. The pump casing provides a gear pump arrangement using two enmeshed gears on an inlet side, and a closely adjacent gear flow meter arrangement downstream of the gear pump arrangement within the same pump casing. The gear flow meter elements are driven only by the force of liquid pumped by the enmeshed gears of the gear pump and cause very low pressure drop across the flow meter elements. Therefore, inaccurate measurements of flow rates due to slippage and viscosity variation are reduced compared to measuring the rotary speed of gear pump gears directly. The system is optimally used to meter and add foam chemical into a pressurized water line for fighting fires.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile