Patent US3868896A successfully refreshed from Google Patents.
US3868896A
Expired / Lapsed
US
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Vehicle cab enclosure with ventilation means
Assignee: Massey Ferguson Inc
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Filing: 1973-03-28
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Granted: 1975-03-04
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Expires: 1993-03-28
Abstract
Abstract A vehicle cab enclosure has a forced air ventilation system including a horizontally arranged intake and filter. The cab is otherwise relatively air tight so that sudden closing of the cab door causes a reverse flow of air through the filter and a loosening of particles thereon. The ventilation system also includes a central air plenum chamber connecting a blower with a pair of side chambers having vents into the cab interior. Heat exchanger means can be provided as can recirculation means.
Inventors
- 👤 Robert M Doll
- 👤 Joseph L Jessup
- 👤 Lawrence J Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:11
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00378; B60H3/00; B60H3/06; B60H3/0608; B60H3/0616; B60H2003/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
In a vehicle cab enclosure including a forced air ventilation system, a forced air means for drawing air from outside the cab, means for distributing air from the forced air means in the cab, an air intake opening connected to the forced air means and providing for air entering or leaving the cab, filter and screen in said air intake opening, a cab door swingable between an open position and a closed position, and characterized by said filter having a lower outwardly exposed surface facing downward and facing said opening so that air passing from outside the cab to said forced air means moves upward through the filter, said air intake opening constituting the major path for air leaving the cab when the door is closed so that as the door is rapidly swung from its open to its closed position there is sudden flow of air in a reverse direction through said forced air means and said filter and screen, whereby foreign particles collected on the lower outwardly exposed surface of the filter are loosened and fall away by gravitational force.
Claim 2
Dependent Claim
182 words
In a vehicle cab enclosure including a forced air ventilation system, a forced air means for drawing air from outside the cab, means for distributing air from the forced air means in the cab, an air intake opening connected to the forced air means and providing for air entering or leaving the cab, filter and screen in said air intake opening, a cab door swingable between an open position and a closed position, and characterized by said filter having a lower outwardly exposed surface facing downward and facing said opening so that air passing from outside the cab to said forced air means moves upward through the filter, said air intake opening constituting the major path for air leaving the cab when the door is closed so that as the door is rapidly swung from its open to its closed position there is sudden flow of air in a reverse direction through said forced air means and said filter and screen, whereby foreign particles collected on the lower outwardly exposed surface of the filter are loosened and fall away by gravitational force.
Claim 3
Dependent Claim
24 words
In a cab enclosure of claim 1 wherein the air intake opening is horizontally arranged and said filter is removably located across the opening.
Claim 4
Dependent Claim
116 words
In a vehicle cab enclosure including a forced air ventilation system arranged in the upper portion of the cab, an air intake opening, filter in said opening, blower means having an intake connected to said air intake opening, a first central plenum chamber extending fore and aft along the length of the top of the cab and connected at one end to the output of the blower means, second and third side plenum chambers arranged laterally outward of said central chamber and connected thereto at the end opposite to the blower means connected to the end of the central chamber, vent means in said second and third chambers opening into the cab interior for directing air.
Claim 5
Dependent Claim
116 words
In a vehicle cab enclosure including a forced air ventilation system arranged in the upper portion of the cab, an air intake opening, filter in said opening, blower means having an intake connected to said air intake opening, a first central plenum chamber extending fore and aft along the length of the top of the cab and connected at one end to the output of the blower means, second and third side plenum chambers arranged laterally outward of said central chamber and connected thereto at the end opposite to the blower means connected to the end of the central chamber, vent means in said second and third chambers opening into the cab interior for directing air.
Claim 6
Dependent Claim
29 words
In a cab of claim 3 wherein adjustable bypass means are provided to aLlow controlled recirculation of air from the interior of the cab into the blower means intake.
Claim 7
Dependent Claim
83 words
The cab of claim 3 wherein the cab enclosure has a door swingable between open and closed positions and wherein said air intake opening constitutes the major path for flow of air between the interior and exterior of the cab when the door is closed so that rapid swinging of the door to a closed position causes a sudden flow of air out through said air intake opening and through the filter means therein to dislodge foreign particles on the outside surface thereof.
Claim 8
Dependent Claim
28 words
In a cab of claim 5 wherein said filter means is substantially horizontally arranged with the intake surface extending downward whereby dislodged particles will fall away by gravity.
Claim 9
Dependent Claim
133 words
In a vehicle cab enclosure including a forced air ventilation system arranged in the upper portion of the cab, an air intake opening, filter means in said opening, blower means having an intake connected to said air intake, a first central plenum chamber extending for and aft along the length of the top of the cab and connected at one end to the output of the blower means, second and third side plenum chambers arranged laterally outward of said central chamber and connected thereto at the end opposite to the blower means connected to the end of the central chamber, vent means in said second and third chambers opening into the cab interior for directing air and heat exchanger means are located at the junction between the central chamber and the side chambers.
Claim 10
Dependent Claim
133 words
In a vehicle cab enclosure including a forced air ventilation system arranged in the upper portion of the cab, an air intake opening, filter means in said opening, blower means having an intake connected to said air intake, a first central plenum chamber extending for and aft along the length of the top of the cab and connected at one end to the output of the blower means, second and third side plenum chambers arranged laterally outward of said central chamber and connected thereto at the end opposite to the blower means connected to the end of the central chamber, vent means in said second and third chambers opening into the cab interior for directing air and heat exchanger means are located at the junction between the central chamber and the side chambers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |