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. 28, 2019
Filed:
Jul. 07, 2015
Applicant:
Cnh Industrial America Llc, New Holland, PA (US);
Inventors:
Assignee:
CNH Industrial America LLC, New Holland, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60H 1/00 (2006.01); B60H 3/06 (2006.01); B01D 46/00 (2006.01); B60H 1/24 (2006.01);
U.S. Cl.
CPC ...
B60H 1/00378 (2013.01); B01D 46/0023 (2013.01); B01D 46/0041 (2013.01); B01D 46/0087 (2013.01); B60H 1/245 (2013.01); B60H 3/0625 (2013.01); B60H 3/0641 (2013.01);
Abstract
A selective filtration system for an operator cab attached to an agricultural vehicle. A HVAC unit supplies conditioned air to an operator space selectively from a CAT 4 filter and a CAT 2 filter. A pressurization blower and two way valve controls flow from the CAT 4 filter to the HVAC unit. Control of flow or isolation of the CAT 2 filter is provided by pressure variations within the system. The CAT 4 filter and CAT 2 filter are isolated from the ambient when they are not in use by valves. A calibrated orifice enables positive pressurization to the CAT 2 filter to hold the valves closed.