US3777648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle ventilating system
Assignee: British Leyland Truck and Bus Div Ltd
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Filing: 1971-07-12
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Granted: 1973-12-11
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Expires: 1991-07-12
Abstract
Abstract A heating/ventilating system of a public service vehicle includes a plenum chamber formed in the vehicle''s roof to which air is supplied by a heating/ventilating unit, the windows of the vehicle being demisted or defrosted by air escaping from the plenum chamber through outlets adjacent the tops of the windows.
Inventors
- 👤 J Mcgowan
- 👤 G Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
B; B62; B62D; B62D31/00; B62D31/02; B60; B60H; B60H1/00; B60H1/00357; B60H1/00371; B60H1/00007; B60H1/00207; B60H2001/00235
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A passenger vehicle body including, a. A vehicle body having a hollow roof, said roof having an elongated plenum chamber; b. a heating/ventilating unit connected to the plenum chamber to feed air into one end of said chamber; c. structural members in the form of apertured panels extending transversely across the plenum chamber normal to the longitudinal axis thereof and spaced apart with respect to one another longitudinally of the plenum chamber to sub-divide the plenum chamber into a plurality of sub-compartments; d. at least one window on each side of said vehicle body; e. each said sub-compartment having a plurality of outlets which are aligned in two lines parallel to the longitudinal axis of the plenum chamber and vehicle body, one line being adjacent and laterally aligned with the top of a window on one side of the vehicle body and the other line being adjacent and laterally aligned with the top of another window on the opposite side of the vehicle body.
Claim 2
Dependent Claim
164 words
A passenger vehicle body including, a. A vehicle body having a hollow roof, said roof having an elongated plenum chamber; b. a heating/ventilating unit connected to the plenum chamber to feed air into one end of said chamber; c. structural members in the form of apertured panels extending transversely across the plenum chamber normal to the longitudinal axis thereof and spaced apart with respect to one another longitudinally of the plenum chamber to sub-divide the plenum chamber into a plurality of sub-compartments; d. at least one window on each side of said vehicle body; e. each said sub-compartment having a plurality of outlets which are aligned in two lines parallel to the longitudinal axis of the plenum chamber and vehicle body, one line being adjacent and laterally aligned with the top of a window on one side of the vehicle body and the other line being adjacent and laterally aligned with the top of another window on the opposite side of the vehicle body.
Claim 3
Dependent Claim
85 words
The passenger vehicle body of claim 1 including: f. a plurality of throttling devices being coupled with the said plurality of outlets, each throttling device comprising a box having an inlet and an outlet, said box outlet being coextensive with said sub-compartment outlet, said inlet being upstream of said outlet, said inlet being defined by means for impeding the flow of air into said box to even out variations of air pressure in said box and thus promote a constant air flow through said outlet.
Claim 4
Dependent Claim
26 words
A passenger vehicle body as claimed in claim 2 in which said flow impedance means comprises a perforated plate which defines one wall of said box.
Claim 5
Dependent Claim
38 words
A passenger vehicle body as claimed in claim 2 in which each said flow impedance means comprises a plurality of mutually spaced apart baffles on said box and which extend in a direction transverse of the plenum chamber.
References Cited (Backward Citations)
US2204114A
Cited
US2065445A
Cited
US2154801A
Cited
US2673512A
Cited
US2719475A
Cited
US2775186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |