Work vehicle with flap for cab pressure control

Patent metadata

Field	Value
Publication number	US-10960726-B2
Application number	US-201916418159-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	May 21, 2019
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A cab for a work vehicle includes: walls enclosing a cab environment; a door coupled to one of the walls, one of the walls or the door comprising a vent opening; a heating, ventilation, and air conditioning (HVAC) system coupled to the cab environment and configured to regulate a temperature and a pressure of the cab environment; and a pressure control flap associated with the vent opening and comprising a pressure-relief opening and a magnetic portion that is configured to hold the flap closed when the pressure of the cab environment is below a threshold pressure and allow the pressure to open the flap when the pressure exceeds the threshold pressure.

First claim

What is claimed is:

1. A cab for a work vehicle, comprising:
a plurality of walls enclosing a cab environment;
a door coupled to one of the walls, one of the walls or the door comprising a vent opening;
a heating, ventilation, and air conditioning (HVAC) system coupled to the cab environment and configured to regulate a temperature and a pressure of the cab environment; and
a pressure control flap associated with the vent opening and comprising a pressure-relief opening and a magnetic portion that is configured to hold the flap closed when the pressure of the cab environment is below a threshold pressure and allow the pressure to open the flap when the pressure exceeds the threshold pressure.

2. The cab of claim 1 , wherein the pressure-relief opening is formed in a center of the flap.

3. The cab of claim 2 , wherein the pressure-relief opening is a circular opening.

4. The cab of claim 1 , wherein the magnetic portion comprises a magnetic strip extending along a first edge of the flap.

5. The cab of claim 4 , wherein at least a portion of the wall or the door comprising the vent opening comprises a ferrous metal and the magnetic strip is magnetically attracted to the ferrous metal.

6. The cab of claim 4 , wherein the flap is hingedly connected to the wall or the door comprising the vent opening at a second edge that is opposite the first edge.

7. The cab of claim 1 , wherein the flap is a flexible flap.

8. The cab of claim 7 , wherein the flap is hingedly connected to the wall or the door comprising the vent opening.

9. The cab of claim 1 , wherein the threshold pressure is between 50 Pa and 130 Pa.

10. A work vehicle, comprising:
a chassis;
a cab carried by the chassis, the cab comprising:
a plurality of walls enclosing a cab environment;
a door coupled to one of the walls, one of the walls or the door comprising a vent opening;
a heating, ventilation, and air conditioning (HVAC) system coupled to the cab environment and configured to regulate a temperature and a pressure of the cab environment; and
a pressure control flap associated with the vent opening and comprising a pressure-relief opening and a magnetic portion that is configured to hold the flap closed when the pressure of the cab environment is below a threshold pressure and allow the pressure to open the flap when the pressure exceeds the threshold pressure.

11. The work vehicle of claim 10 , wherein the pressure-relief opening is formed in a center of the flap.

12. The work vehicle of claim 11 , wherein the pressure-relief opening is a circular opening.

13. The work vehicle of claim 10 , wherein the magnetic portion comprises a magnetic strip extending along a first edge of the flap.

14. The work vehicle of claim 13 , wherein at least a portion of the wall or the door comprising the vent opening comprises a ferrous metal and the magnetic strip is magnetically attracted to the ferrous metal.

15. The work vehicle of claim 13 , wherein the flap is hingedly connected to the wall or the door comprising the vent opening at a second edge that is opposite the first edge.

16. The work vehicle of claim 10 , wherein the flap is a flexible flap.

17. The work vehicle of claim 16 , wherein the flap is hingedly connected to the wall or the door comprising the vent opening.

18. The work vehicle of claim 10 , wherein the threshold pressure is between 50 Pa and 130 Pa.

Assignees

• Cnh Ind America Llc

Inventors

• Singh Samrendra K
• Abbassi Hesam
• Tamamidis Panos
• Chernyavsky Leonid

Classifications

• B60H1/00735

  Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models · CPC title

• B62D33/06

  Drivers' cabs {(overhead guards, e.g. against loads falling down B60R21/11; roll-over protection B60R21/13)} · CPC title

• B62D33/0617

  for tractors or off-the-road vehicles (protective devices for drivers in case of overturning of tractors B60R21/131) · CPC title

• B60H1/00378 Primary

  for tractor or load vehicle cabins · CPC title

• B60H1/249

  using one-way valves · CPC title