Patent US3782628A successfully refreshed from Google Patents.
US3782628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable heating unit
Assignee: Galt Equipment Ltd
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Filing: 1971-03-19
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Granted: 1974-01-01
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Expires: 1991-03-19
Abstract
Abstract A portable self-contained temperature controlling unit is removably inserted in a shipping container so that the contents may be heated or cooled during shipment. In the instance of heating, the portable unit derives its heat output from the operation of an internal combustion engine which is embodied in the unit along with its fuel supply. The heating unit includes primary and secondary air circuits in heat exchange relation with each other, and connections of these circuits to outside air have thermostatically controlled valves arranged so that the heat output of the unit is regulated while the operating speed of the engine remains constant.
Inventors
- 👤 M Beaudet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:44
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008; F24; F24H; F24H3/00; F24H3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A portable self-contained heating unit comprising a housing, an internal combustion engine provided in said housing, a supply of fuel in the housing for said engine, said engine having a combustion air intake and an exhaust pipe communicating with the exterior of the housing, a continuous primary air circuit provided in the housing past said engine and said exhaust pipe, a secondary air circuit through the housing in heat exchange relation with said primary air circuit, and a blower driven by said engine for circulation of air through the secondary air circuit.
Claim 2
Dependent Claim
92 words
A portable self-contained heating unit comprising a housing, an internal combustion engine provided in said housing, a supply of fuel in the housing for said engine, said engine having a combustion air intake and an exhaust pipe communicating with the exterior of the housing, a continuous primary air circuit provided in the housing past said engine and said exhaust pipe, a secondary air circuit through the housing in heat exchange relation with said primary air circuit, and a blower driven by said engine for circulation of air through the secondary air circuit.
Claim 3
Dependent Claim
32 words
The device as defined in claim 1 together with thermostatically controlled air inlet and outlet valve means communicating each of said primary and secondary air circuits with the exterior of said housing.
Claim 4
Dependent Claim
47 words
The device as defined in claim 1 together with a valved primary air inlet and a valved primary air outlet communicating said primary air circuit with the exterior of said housing, and a thermostat within the primary air circuit for controlling the valved air inlet and outlet.
Claim 5
Dependent Claim
47 words
The device as defined in claim 1 together with a valved secondary air inlet and a valved secondary air outlet communicating said secondary air circuit with the exterior of said housing, and a thermostat within the secondary air circuit for controlling the valved air inlet and outlet.
Claim 6
Dependent Claim
96 words
The device as defined in claim 1 together with a valved primary air inlet and outlet and a valved secondary air inlet and outlet communicating the respective primary and secondary air circuits with the exterior of said housing, and thermostats within the respective primary and secondary air circuits for controlling the primary air inlet and outlet and secondary air inlet and outlet respectively, the device being further characterized in that the heat output of the heating unit is controlled by the valued air inlets and outlets while the operating speed of said engine remains substantially constant.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |