US3872694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washing machine
Assignee: Hitachi Ltd
•
Filing: 1973-05-11
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Granted: 1975-03-25
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Expires: 1993-05-11
Abstract
Abstract A washing machine with a drying basket rotatably provided in a water tank and with a pulsator provided at the bottom portion of the drying basket has a difference between the optimum number of revolutions of the drying basket and that of the pulsator. The washing machine is provided with a pole change motor for driving the drying basket and the pulsator wherein the motor is driven with a large number of poles in washing and rinsing operations and with a small number of poles in a drying operation to drive the dehydrating basket and the pulsator at an optimum speed of rotation.
Inventors
- 👤 Tamotu Sikamori
- 👤 Haruyuki Kaito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:48
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/30; D06F37/304; D06F34/00; D06F34/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the basket means during drying operation of the washing machine, brake means for holding said basket means stationary during washing and rinsing operations of the washing machine, means for operating said clutch means during drying operation of the machine so as to transmit the power from said motor means to the basket means, means for releasing said brake means during drying operation, and switch means for selecting the number of poles of said motor means corresponding to a maximum number or an intermediate number during washing and rinsing operations of the machine.
Claim 2
Dependent Claim
162 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the basket means during drying operation of the washing machine, brake means for holding said basket means stationary during washing and rinsing operations of the washing machine, means for operating said clutch means during drying operation of the machine so as to transmit the power from said motor means to the basket means, means for releasing said brake means during drying operation, and switch means for selecting the number of poles of said motor means corresponding to a maximum number or an intermediate number during washing and rinsing operations of the machine.
Claim 3
Dependent Claim
140 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the basket means during drying operation of the machine, brake means for holding said basket means stationary during washing and rinsing operations of the machine, means for operating said clutch means and releasing said brake means during drying operation of the machine, and switch means for selecting the number of poles of said motor means corresponding to a minimum number or an intermediate number during drying operation of the machine.
Claim 4
Dependent Claim
140 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the basket means during drying operation of the machine, brake means for holding said basket means stationary during washing and rinsing operations of the machine, means for operating said clutch means and releasing said brake means during drying operation of the machine, and switch means for selecting the number of poles of said motor means corresponding to a minimum number or an intermediate number during drying operation of the machine.
Claim 5
Dependent Claim
171 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the Basket means during drying operation of the machine, brake means for holding said basket means stationary during washing and rinsing operations of the machine, means for operating said clutch means and releasing said brake means during drying operation of the machine, first switch means for selecting the number of poles of said motor means corresponding to a maximum number or an intermediate number during washing and rinsing operations of the machine, and second switch means for selecting the number of poles of said motor means corresponding to a minimum number or an intermediate number during drying operation of the machine.
Claim 6
Dependent Claim
171 words
A washing machine comprising basket means for receiving articles to be washed, said means being rotatably mounted in a water tank, pulsating means provided for said basket means, pole change motor means for driving said basket means and pulsating means, the number of poles of said motor means being adjustable to control the motor means speed in three steps, clutch means for transmitting driving power from the motor means to the Basket means during drying operation of the machine, brake means for holding said basket means stationary during washing and rinsing operations of the machine, means for operating said clutch means and releasing said brake means during drying operation of the machine, first switch means for selecting the number of poles of said motor means corresponding to a maximum number or an intermediate number during washing and rinsing operations of the machine, and second switch means for selecting the number of poles of said motor means corresponding to a minimum number or an intermediate number during drying operation of the machine.
Claim 7
Dependent Claim
34 words
A washing machine according to claim 3, wherein said first and second switch means are connected to contacts of cam switches changed-over during drying operation and during washing and rinsing operations of the machine.
Claim 8
Dependent Claim
45 words
A washing machine according to claim 1, wherein the pulsating means is located at a central bottom portion of the basket means, and wherein the clutch means transmits driving power from the motor means to the basket means only during drying operation of the machine.
Claim 9
Dependent Claim
45 words
A washing machine according to claim 2, wherein the pulsating means is located at a central bottom portion of the basket means, and wherein the clutch means transmits driving power from the motor means to the basket means only during drying operation of the machine.
Claim 10
Dependent Claim
45 words
A washing machine according to claim 3, wherein the pulsator means is located at a central bottom portion of the basket means, and wherein the clutch means transmits driving power from the motor means to the basket means only during drying operation of the machine.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |