US3908900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating automotive heating system
Assignee: Individual
•
Filing: 1974-04-29
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Granted: 1975-09-30
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Expires: 1994-04-29
Abstract
Abstract An air recirculating assembly adapted for use in combination with a vehicle including an enclosable passenger compartment, an air-cooled engine having an engine cooling blower, and a heating system including at least one heat exchanger in heat exchange relationship with the engine for heating ambient air, a supply duct for conducting ambient air to the heat exchanger from the outlet side of the engine cooling blower, and an air distribution network for conducting heated air from the heat exchanger to the passenger compartment; the assembly comprising a recirculating blower having an inlet and outlet, the inlet being adapted for communication with the passenger compartment of the vehicle, and a return air duct adapted for connection between the outlet of the recirculating blower and the supply duct on the outlet side of the engine cooling blower for conducting air from the passenger compartment to the heat exchanger.
Inventors
- 👤 James R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/02; B60H1/14; B60H1/16
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
143 words
A recirculating heating system for a vehicle having an enclosable passenger compartment comprising: heat exchange means for heating ambient air, primary blower means having an inlet side and an outlet side, supply duct means for conducting ambient air from the outlet side of said primary blower means to said heat exchange means, air distribution means connected to said heat exchange means for conducting heated air to the interior of the passenger compartment of the vehicle, and air recirculating means including secondary blower means having inlet means and outlet means, said inlet means communicating with the interior of the passenger compartment, and return air duct means connected to said outlet means of said secondary blower means for conducting air to said heat exchange means, said return air conducting means communicating with said supply duct means on the outLet side of said primary blower means.
Claim 2
Dependent Claim
143 words
A recirculating heating system for a vehicle having an enclosable passenger compartment comprising: heat exchange means for heating ambient air, primary blower means having an inlet side and an outlet side, supply duct means for conducting ambient air from the outlet side of said primary blower means to said heat exchange means, air distribution means connected to said heat exchange means for conducting heated air to the interior of the passenger compartment of the vehicle, and air recirculating means including secondary blower means having inlet means and outlet means, said inlet means communicating with the interior of the passenger compartment, and return air duct means connected to said outlet means of said secondary blower means for conducting air to said heat exchange means, said return air conducting means communicating with said supply duct means on the outLet side of said primary blower means.
Claim 3
Dependent Claim
36 words
A system as set forth in claim 1 wherein said air recirculating means includes check valve means for substantially preventing air flow through said air recirculating means in a direction away from said supply duct means.
Claim 4
Dependent Claim
55 words
A system as set forth in claim 2 wherein said check valve means includes a valve member openable in response to air flow in a first direction and closable in reponse to air flow in a second direction and to a condition of no air flow, said first direction being toward said supply duct means.
Claim 5
Dependent Claim
27 words
A system as set forth in claim 3 wherein said return air duct means includes connection means for intersectingly connecting the same to said supply duct means.
Claim 6
Dependent Claim
24 words
A system as set forth in claim 4 wherein said connection means includes a connection member having two inlet branches and one outlet branch.
Claim 7
Dependent Claim
21 words
A system as set forth in claim 5 wherein said outlet means of said secondary blower means includes two outlet members.
Claim 8
Dependent Claim
38 words
A system as set forth in claim 6 wherien said return air duct means includes two return air hose members, one of said hose members being connected to each of said outlet members of said secondary blower means.
Claim 9
Dependent Claim
24 words
A system as set forth in claim 7 wherein said primary blower means includes a fan and a fan shroud having two outlet pipes.
Claim 10
Dependent Claim
30 words
A system as set forth in claim 8 wherein said heat exchange means includes a pair of heat exchangers in heat exchange relationship with a heated portion of the engine.
Claim 11
Dependent Claim
35 words
A system as set forth in claim 9 wherein said supply duct means includes a pair of heater hose members connected between said two outlet pipes of said fan shroud and said two heat exchangers.
Claim 12
Dependent Claim
36 words
A system as set forth in claim 7 wherein said heated air distribution means includes valve means for controlling the flow of air of various parts of the passenger compartment and for selectively preventing air flow.
Claim 13
Dependent Claim
150 words
An air recirculating assembly adapted for use in combination with a vehicle including an enclosable passenger compartment, an air-cooled engine having an engine cooling blower, and a heating system including at least one heat exchanger in heat exchange relationship with the engine for heating ambient air, a supply duct for conducting ambient air to the heat exchanger from the outlet side of the engine cooling blower, and an air distribution network for conducting heated air from the heat exchanger to the passenger compartment; said assembly comprising recirculating blower means having inlet means and outlet means, said inlet means being adapted for communication with the passenger compartment of the vehicle, and return air duct means adapted for connection between said outlet means of said recirculating blower means and the supply duct on the outlet side of the engine cooling blower for conducting air from the passenger compartment to the heat exchanger.
Claim 14
Dependent Claim
150 words
An air recirculating assembly adapted for use in combination with a vehicle including an enclosable passenger compartment, an air-cooled engine having an engine cooling blower, and a heating system including at least one heat exchanger in heat exchange relationship with the engine for heating ambient air, a supply duct for conducting ambient air to the heat exchanger from the outlet side of the engine cooling blower, and an air distribution network for conducting heated air from the heat exchanger to the passenger compartment; said assembly comprising recirculating blower means having inlet means and outlet means, said inlet means being adapted for communication with the passenger compartment of the vehicle, and return air duct means adapted for connection between said outlet means of said recirculating blower means and the supply duct on the outlet side of the engine cooling blower for conducting air from the passenger compartment to the heat exchanger.
Claim 15
Dependent Claim
35 words
An assembly as set forth in claim 12 wherein said assembly includes check valve means for substantially preventing air flow through said return air duct means in a direction away from the supply duct means.
Claim 16
Dependent Claim
55 words
An assembly as set forth in claim 13 wherein said check valve means includes a valve member openable in response to air flow in a first direction and closable in response to air flow in a second direction and to a condition of no air flow, said first direction being toward the supply duct means.
Claim 17
Dependent Claim
22 words
An assembly as set forth in claim 14 wherein said return air duct means includes at least one return air hose member.
Claim 18
Dependent Claim
29 words
An assembly as set forth in claim 15 wherein said return air duct means includes connection means for intersectingly connecting said return air hose member to the supply duct.
Claim 19
Dependent Claim
24 words
An assembly as set forth in claim 16 wherein said connection means includes a connection member having two inlet branches and one outlet branch.
Claim 20
Dependent Claim
33 words
An assembly as set forth in claim 17 wherein said outlet means of said recirculating blower means includes two outlet members and said return air duct means includes two return air hose members.
Claim 21
Dependent Claim
24 words
An assembly as set forth in claim 18 wherein one of said connection members is provided for each of said return air hose members.
Claim 22
Dependent Claim
34 words
An assembly as set forth in claim 19 wherein said check valve means includes two valve members, one of which is hingedly attached to each of said outlet members of said recirculating blower means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |