Patent US3874282A successfully refreshed from Google Patents.
US3874282A
Expired / Lapsed
US
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Domestic refuse compactor
Assignee: Hitachi Ltd
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Filing: 1973-08-23
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Granted: 1975-04-01
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Expires: 1993-08-23
Abstract
Abstract A domestic refuse compactor comprising a cabinet with a front entrance, a device for compressing or crushing refuse, an arrangement for holding a refuse-receiving container accommodated in the cabinet selectively movably between an inner hidden position for refuse compaction and an outer exposed position for placement or removal of the refuse, a motor for the compressingcrushing device, a key switch mechanism for the motor, and a mechanism for locking the refuse-container holding arrangement in the inner position for compaction. The key switch mechanism is operatively connected to the locking mechanism so that it can work only when the latter is operable, and has a cam which can close a microswitch for power supply and, at the same time, actuate a spring-loaded stopper of the lock mechanism to lock the door securely while the machine is in operation.
Inventors
- 👤 Keizi Oouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:23
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/30; B30B9/3003; B30B9/3007; B30B9/3032
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A safety key switch device comprising: microswitch means, locking means, and a cam member installed in the key switch device in such a manner that it moves upon actuation to a position which simultaneously closes the microswitch means and actuates the locking means, wherein said locking means includes return spring means for pressing an end of said locking means against the cam member, wherein said cam member has a configuration which is longer in one of its length and its width, wherein said key switch device includes means to stop the cam member in said position slightly beyond its dead center when the key switch device is actuated, so that the spring means operates to avoid movement of the cam out of said position, and wherein the device is operationally connected with a machine in such a manner that the locking means locks a door of the machine when actuated and the microswitch means actuates an electric motor drive of the machine when closed.
Claim 2
Dependent Claim
164 words
A safety key switch device comprising: microswitch means, locking means, and a cam member installed in the key switch device in such a manner that it moves upon actuation to a position which simultaneously closes the microswitch means and actuates the locking means, wherein said locking means includes return spring means for pressing an end of said locking means against the cam member, wherein said cam member has a configuration which is longer in one of its length and its width, wherein said key switch device includes means to stop the cam member in said position slightly beyond its dead center when the key switch device is actuated, so that the spring means operates to avoid movement of the cam out of said position, and wherein the device is operationally connected with a machine in such a manner that the locking means locks a door of the machine when actuated and the microswitch means actuates an electric motor drive of the machine when closed.
Claim 3
Dependent Claim
13 words
A device according to claim 1, wherein the machine is a refuse compactor.
Claim 4
Dependent Claim
186 words
A domestic refuse compactor comprising a cabinet base, compressing-crushing means installed on the base to compress or crush refuse contained in refuse receiving means, motor means for driving the compressing-crushing means, key switch means for the motor means, and locking means for locking a refuse receiving holding means, said key switch means being operatively connected to the locking means in the condition where the locking means is actuated, wherein said key switch means includes microswitch means, wherein cam means is installed in the key switch means in such a manner that the cam means moves upon actuation to simultaneously close the microswitch means and actuate the locking means, wherein said locking means has return spring means that presses one end of the locking means against the cam means, and wherein said key switch means has means to stop the cam means in a position slightly beyond its dead center when the key switch means is actuated, so that a spring force of the spring means can be utilized to absorb vibrations of the compactor and to avoid movement of the cam means out of said position.
Claim 5
Dependent Claim
186 words
A domestic refuse compactor comprising a cabinet base, compressing-crushing means installed on the base to compress or crush refuse contained in refuse receiving means, motor means for driving the compressing-crushing means, key switch means for the motor means, and locking means for locking a refuse receiving holding means, said key switch means being operatively connected to the locking means in the condition where the locking means is actuated, wherein said key switch means includes microswitch means, wherein cam means is installed in the key switch means in such a manner that the cam means moves upon actuation to simultaneously close the microswitch means and actuate the locking means, wherein said locking means has return spring means that presses one end of the locking means against the cam means, and wherein said key switch means has means to stop the cam means in a position slightly beyond its dead center when the key switch means is actuated, so that a spring force of the spring means can be utilized to absorb vibrations of the compactor and to avoid movement of the cam means out of said position.
Claim 6
Dependent Claim
71 words
A compactor according to claim 3, wherein the locking means is a stopper, wherein the locking means further comprises means for holding the refuse receiving means selectively movably between a preset inner position for compaction on the base and an outer exposed position where the compact mass of refuse is to be removed from the compactor, and wherein the locking means locks the refuse receiving holding means in a preset position.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |