Patent US3577752A successfully refreshed from Google Patents.
US3577752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laundry apparatus
Assignee: GA Braun Inc
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Filing: 1968-11-12
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Granted: 1971-05-04
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Expires: 1988-11-12
Abstract
Abstract Institutional laundry equipment including laundry washing and extracting apparatus having a substantially airtight casing, with separate loading and unloading doors, disposed in a partition dividing a laundry area into a laundry-receiving room and a clean laundry room, the receiving room having an exhaust fan for maintaining subatmospheric pressure in the receiving room, an air duct connecting the casing with outside air, port means in the casing opening into the receiving room, and interlocking means for the doors to maintain at least one of the doors closed at all times, the port means being either an air duct or a casing water dump valve open to the receiving room or both.
Inventors
- 👤 Max Hertig
- 👤 Peter J Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:24
CPC Classifications
D; D06; D06F; D06F95/00; A; A61; A61L; A61L2103/00; A61L2103/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
Laundry equipment for institutional use comprising a laundry washing and extracting apparatus having a substantially airtight casing, said casing having separate loading and unloading doors, a laundry area separated by a partition in which the lauNdry apparatus casing is disposed with its unloading door opening into the clean laundry room, and the loading door opening into the receiving room, said receiving room having an exhaust fan means for maintaining subatmospheric pressure in the receiving room, an air duct connecting said casing with outside air other than from the clean room, port means separate from the air duct in the casing opening into said receiving room of a sufficient size in relation to said air duct to effect subatmospheric pressure in the casing, and interlocking means for said doors to maintain at least one of said doors closed at all times.
Claim 2
Dependent Claim
140 words
Laundry equipment for institutional use comprising a laundry washing and extracting apparatus having a substantially airtight casing, said casing having separate loading and unloading doors, a laundry area separated by a partition in which the lauNdry apparatus casing is disposed with its unloading door opening into the clean laundry room, and the loading door opening into the receiving room, said receiving room having an exhaust fan means for maintaining subatmospheric pressure in the receiving room, an air duct connecting said casing with outside air other than from the clean room, port means separate from the air duct in the casing opening into said receiving room of a sufficient size in relation to said air duct to effect subatmospheric pressure in the casing, and interlocking means for said doors to maintain at least one of said doors closed at all times.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein the port means comprises an air duct of greater cross section than said outside air duct.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 1 wherein the port means comprises a water dump valve for the casing communicating with the receiving room during the extracting operations of the apparatus.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 1 wherein the port means comprises both an air duct open to the receiving room and a casing water dump valve open to the receiving room during the extracting operations of the apparatus.
References Cited (Backward Citations)
US3318122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |