US3675439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable container refrigeration system
Assignee: Enviri Corp
•
Filing: 1970-09-25
•
Granted: 1972-07-11
•
Expires: 1990-09-25
Abstract
Abstract A cryogenic liquid spray refrigeration system detachably mounted on a portable product shipping container for in-transit refrigeration of said container in which refrigeration system requires minimal alteration of said shipping container.
Inventors
- 👤 David Paul Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/74; B65D88/745; F; F25; F25D; F25D19/00; F25D19/02; F25D3/00; F25D3/10; F25D3/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
Apparatus for refrigeration of stored product within a portable thermally insulated shipping container having at least one porthole therein, which apparatus comprises a liquefied gas refrigerant storage tank with associated flow control means removably attached to said shipping container; a refrigerant dispensing means and a temperature sensing means disposed within said shipping container; a porthole closure assembly arranged to detachably gas tightly seal said porthole; pressure relief means within said porthole closure assembly; connection means disposed through said porthole closure assembly and arranged to operably connect said flow control means with said refrigerant dispensing means and said temperature sensing means such that refrigerant flow is responsive to the temperature sensed by said temperature sensing means within said shipping container; and detachable couplings within said connection means between said porthole closure assembly and said flow control means.
Claim 2
Dependent Claim
136 words
Apparatus for refrigeration of stored product within a portable thermally insulated shipping container having at least one porthole therein, which apparatus comprises a liquefied gas refrigerant storage tank with associated flow control means removably attached to said shipping container; a refrigerant dispensing means and a temperature sensing means disposed within said shipping container; a porthole closure assembly arranged to detachably gas tightly seal said porthole; pressure relief means within said porthole closure assembly; connection means disposed through said porthole closure assembly and arranged to operably connect said flow control means with said refrigerant dispensing means and said temperature sensing means such that refrigerant flow is responsive to the temperature sensed by said temperature sensing means within said shipping container; and detachable couplings within said connection means between said porthole closure assembly and said flow control means.
Claim 3
Dependent Claim
26 words
An apparatus as described in claim 1 wherein the refrigerant dispensing means comprises a perforated conduit means disposed within the upper portion of said shipping container.
Claim 4
Dependent Claim
19 words
An apparatus as described in claim 1 wherein the temperature sensing means is detachably connected to said shipping container.
Claim 5
Dependent Claim
43 words
An apparatus as described in claim 1 wherein said flow control means comprises a refrigerant flow control valve operably disposed between said connection means and said refrigerant storage tank; and a refrigerant flow control valve control means responsive to said temperature sensing means.
Claim 6
Dependent Claim
232 words
Apparatus for refrigerating stored product within a portable thermally insulated shipping container having at least one porthole therein, which apparatus comprises a liquefied gas refrigerant storage tank with associated flow control means removably attached to said shipping container; a perforated refrigerant dispensing conduit means disposed within the upper portion of said shipping container; temperature sensing means detachably disposed within said shipping container proximate the shipping container porthole; a porthole closure assembly arranged to detachably, gas tightly seal said porthole, said closure assembly having at least one gas pressure relief means therein; said temperature sensing means being connected through said porthole closure assembly to a temperature sensing means connector which is mounted outside of said porthole closure assembly; a porthole closure refrigerant conduit which passes through said closure and attaches at one end to a refrigerant connector fitting mounted outside of said closure and is removably attachable at the other end to the perforated refrigerant dispensing conduit within said shipping container; said refrigerant flow control means being detachably connected to said temperature sensing means connector fitting such that refrigerant flow control is responsive to temperature sensed by said temperature sensing means and said flow control means contains a refrigerant flow control valve which is operably disposed within a refrigerant conduit connected at one end to said refrigerant storage tank and at the other end detachably connected to said porthole closure refrigerant connector fitting.
Claim 7
Dependent Claim
232 words
Apparatus for refrigerating stored product within a portable thermally insulated shipping container having at least one porthole therein, which apparatus comprises a liquefied gas refrigerant storage tank with associated flow control means removably attached to said shipping container; a perforated refrigerant dispensing conduit means disposed within the upper portion of said shipping container; temperature sensing means detachably disposed within said shipping container proximate the shipping container porthole; a porthole closure assembly arranged to detachably, gas tightly seal said porthole, said closure assembly having at least one gas pressure relief means therein; said temperature sensing means being connected through said porthole closure assembly to a temperature sensing means connector which is mounted outside of said porthole closure assembly; a porthole closure refrigerant conduit which passes through said closure and attaches at one end to a refrigerant connector fitting mounted outside of said closure and is removably attachable at the other end to the perforated refrigerant dispensing conduit within said shipping container; said refrigerant flow control means being detachably connected to said temperature sensing means connector fitting such that refrigerant flow control is responsive to temperature sensed by said temperature sensing means and said flow control means contains a refrigerant flow control valve which is operably disposed within a refrigerant conduit connected at one end to said refrigerant storage tank and at the other end detachably connected to said porthole closure refrigerant connector fitting.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |