US3720842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportable refrigeration unit having induction alternator-induction motor reconnection and control system
Assignee: Thermo King Corp
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Filing: 1971-10-07
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Granted: 1973-03-13
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Expires: 1991-10-07
Abstract
Abstract This invention relates to a transportable refrigeration unit having two modes of operation and more particularly to such a refrigeration unit having an induction machine that may function as a prime mover or as a generator of electric power after the proper connection to an appropriate receptacle has been made with a power cord which is connected to the induction machine and is adapted to be received by either a receptacle that is attached to the unit and has passive electrical components so connected thereto for converting the induction machine to an electric generator or to be received by an external electric power source receptacle without passive components connected thereto when the induction machine is to function as a prime mover.
Inventors
- 👤 R Martin
- 👤 L Howland
- 👤 Roy Eichinger Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:01
CPC Classifications
F; F25; F25B; F25B27/00; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3222; H; H02; H02K; H02K17/00; F25B2327/00; F25B2327/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
280 words
A transportable refrigeration unit having two modes of operation to be powered by a first prime mover in the first mode of operation or from a receptacle of an electric power source to be connected to a second prime mover in the second mode of operation and comprising, a first prime mover, an induction machine operable as a generator in the first mode of operation and as a motor to be a second prime mover in the second mode of operation, a mechanical load connected to be driven with said induction machine, an electrical load, a power cord and plug, a receptacle having passive electrical components connected thereto and attached to the transportable unit, means to connect said first prime mover to said mechanical load and to said Induction machine when functioning as a generator in the first mode of operation and to disconnect said first prime mover from the mechanical load and said induction maching when functioning as a second prime mover in the second mode of operation, means to connect said power cord to said induction machine and to said electrical load during the first and second modes of operation, said plug adapted to be received in said attached receptacle to connect said passive components to said induction machine to enable said induction machine to function as a generator of electric power for said electric load in the first mode of operation, said cord and plug being adapted to be connected to the external electric power receptacle in the second mode of operation to power said electrical load and said induction machine therefrom for causing said induction machine to function as a motor and the second prime mover.
Claim 2
Dependent Claim
280 words
A transportable refrigeration unit having two modes of operation to be powered by a first prime mover in the first mode of operation or from a receptacle of an electric power source to be connected to a second prime mover in the second mode of operation and comprising, a first prime mover, an induction machine operable as a generator in the first mode of operation and as a motor to be a second prime mover in the second mode of operation, a mechanical load connected to be driven with said induction machine, an electrical load, a power cord and plug, a receptacle having passive electrical components connected thereto and attached to the transportable unit, means to connect said first prime mover to said mechanical load and to said Induction machine when functioning as a generator in the first mode of operation and to disconnect said first prime mover from the mechanical load and said induction maching when functioning as a second prime mover in the second mode of operation, means to connect said power cord to said induction machine and to said electrical load during the first and second modes of operation, said plug adapted to be received in said attached receptacle to connect said passive components to said induction machine to enable said induction machine to function as a generator of electric power for said electric load in the first mode of operation, said cord and plug being adapted to be connected to the external electric power receptacle in the second mode of operation to power said electrical load and said induction machine therefrom for causing said induction machine to function as a motor and the second prime mover.
Claim 3
Dependent Claim
280 words
A transportable refrigeration unit having two modes of operation to be powered by a first prime mover in the first mode of operation or from a receptacle of an electric power source to be connected to a second prime mover in the second mode of operation and comprising, a first prime mover, an induction machine operable as a generator in the first mode of operation and as a motor to be a second prime mover in the second mode of operation, a mechanical load connected to be driven with said induction machine, an electrical load, a power cord and plug, a receptacle having passive electrical components connected thereto and attached to the transportable unit, means to connect said first prime mover to said mechanical load and to said Induction machine when functioning as a generator in the first mode of operation and to disconnect said first prime mover from the mechanical load and said induction maching when functioning as a second prime mover in the second mode of operation, means to connect said power cord to said induction machine and to said electrical load during the first and second modes of operation, said plug adapted to be received in said attached receptacle to connect said passive components to said induction machine to enable said induction machine to function as a generator of electric power for said electric load in the first mode of operation, said cord and plug being adapted to be connected to the external electric power receptacle in the second mode of operation to power said electrical load and said induction machine therefrom for causing said induction machine to function as a motor and the second prime mover.
Claim 4
Dependent Claim
280 words
A transportable refrigeration unit having two modes of operation to be powered by a first prime mover in the first mode of operation or from a receptacle of an electric power source to be connected to a second prime mover in the second mode of operation and comprising, a first prime mover, an induction machine operable as a generator in the first mode of operation and as a motor to be a second prime mover in the second mode of operation, a mechanical load connected to be driven with said induction machine, an electrical load, a power cord and plug, a receptacle having passive electrical components connected thereto and attached to the transportable unit, means to connect said first prime mover to said mechanical load and to said Induction machine when functioning as a generator in the first mode of operation and to disconnect said first prime mover from the mechanical load and said induction maching when functioning as a second prime mover in the second mode of operation, means to connect said power cord to said induction machine and to said electrical load during the first and second modes of operation, said plug adapted to be received in said attached receptacle to connect said passive components to said induction machine to enable said induction machine to function as a generator of electric power for said electric load in the first mode of operation, said cord and plug being adapted to be connected to the external electric power receptacle in the second mode of operation to power said electrical load and said induction machine therefrom for causing said induction machine to function as a motor and the second prime mover.
Claim 5
Dependent Claim
48 words
The invention as defined in claim 1 having means to control the operation of said first prime mover, said attached receptacle having means connected to said control means whereby said first prime mover is able to be operable only when said plug is received in said attached receptacle.
Claim 6
Dependent Claim
49 words
The invention as defined in claim 2 having means to control the operation of said first prime mover, said attached receptacle providing electrical connections between said power cord and said prime mover control means for enabling said first prime mover to be operable during the first mode of operation.
Claim 7
Dependent Claim
48 words
The invention as defined in claim 1 wherein the means for connecting the first prime mover to said mechanical load and to said induction machine in the first mode of operation and for disconnecting said first prime mover in the second mode of operation is a centrifugal clutch.
References Cited (Backward Citations)
US3512373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |