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:
Feb. 22, 2005
Filed:
Mar. 01, 2004
Robert S. Hunka, Oakland, CA (US);
Robert S. Hunka, Oakland, CA (US);
Acutherm L.P., Hayward, CA (US);
Abstract
A thermally powered VAV diffuser assembly () having a housing () formed for coupling to a supply air duct or conduit (), a damper () mounted across a supply air opening () for movement relative thereto to vary the volume of supply air discharge from the diffuser and a thermally powered damper position controlled device or assembly (). The control assembly () includes not more than two sensor-actuators () and a movable linkage assembly. The linkage assembly transmits movement of the sensor-actuators () to the damper () for displacement of the damper () to vary the volume discharged and to produce change-overs between heating and cooling modes. The heating mode and cooling mode set point temperatures are each independently adjustable, and the movable linkage assembly includes a lever () pivoted about two pivot points by axles () which slide in slots (). The sensor-actuators () and all of the movable linkage assembly are located on a room side of the movable damper () so that removal of the appearance panel () exposes these elements for ease of maintenance, repair and replacement. An adjustable minimum flow stop () balancing arm () and change-over linkage () also are provided.