US3799348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the automatic balancing of washing and drying machines
Assignee: Industrie Zanussi SpA
•
Filing: 1971-07-27
•
Granted: 1974-03-26
•
Expires: 1991-07-27
Abstract
Abstract A device for rebalancing the rotary baskets of washing machines and the like, of the kind in which liquid masses are used for balancing the basket. The rear wall of the basket is elastically deformed (for example, it is a metal disc) and the deformations are transferred to a valve which feeds with liquid a number of peripheral chambers mounted on the basket. As rebalancing is achieved, the deformation of the disc ceases and the valve is closed. Water is spontaneously discharged in the usual suds tub.
Inventors
- 👤 L Mazza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:18
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/20; D06F37/22; D06F37/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A device for the automatic balancing of washing and centrifuging machines of the type including a horizontal driving shaft, a rotary basket, said basket having an elastically deformable vertical rear wall, said rear wall being mounted on the driving shaft whereby the basket is carried in a cantilever manner on the driving shaft, and means within the basket defining peripheral chambers for receiving an amount of liquid for balancing the unbalancing stresses due to an irregular distribution of the basket load, improvement comprising valve means for feeding liquid to at least one of the chambers, means operably mounting the valve means on the shaft and basket for rotation in unison therewith, a plate affixed to the deformable rear wall of the basket adjacent the valve means, and a valve actuating member carried by the plate and operated by the deformation of said rear wall for actuating the valve means to feed liquid to said at least one chamber.
Claim 2
Independent Claim
158 words
A device for the automatic balancing of washing and centrifuging machines of the type including a horizontal driving shaft, a rotary basket, said basket having an elastically deformable vertical rear wall, said rear wall being mounted on the driving shaft whereby the basket is carried in a cantilever manner on the driving shaft, and means within the basket defining peripheral chambers for receiving an amount of liquid for balancing the unbalancing stresses due to an irregular distribution of the basket load, improvement comprising valve means for feeding liquid to at least one of the chambers, means operably mounting the valve means on the shaft and basket for rotation in unison therewith, a plate affixed to the deformable rear wall of the basket adjacent the valve means, and a valve actuating member carried by the plate and operated by the deformation of said rear wall for actuating the valve means to feed liquid to said at least one chamber.
Claim 3
Independent Claim
248 words
A device for the automatic balancing of washing and centrifuging machines of the type including a driving shaft, a rotary basket mounted in an overhanging manner on the driving shaft, and means within the basket defining peripheral chambers for receiving an amount of liquid for balancing the unbalancing stresses due to an irregular distribution of the basket load, the improvement comprising valve means for feeding liquid to at least one of the chambers, means operably mounting the valve means on the shaft and basket for rotation in unison therewith, said basket having a portion thereof which is elastically deformable under the action of an unbalance of the rotary basket, and means directly operatEd by the deformation of such portion for actuating the valve means to feed liquid to said at least one chamber, in which there is a valve means for each chamber, each valve having a hollowed body integral with the driving shaft, said body having an outlet, a head for closing the outlet, an actuating stem secured to the valve head extending axially of the hollow body, and an operating member affixed to said elastically deformable portion operative upon deformation of said portion to actuate the stem to move the head to open the outlet, an outer tub in which the basket is located and each chamber having an outlet in direct and continuous communication with the outer tub, with the outlet of each valve extending through the outlet of each chamber into the interior thereof.
Claim 4
Independent Claim
248 words
A device for the automatic balancing of washing and centrifuging machines of the type including a driving shaft, a rotary basket mounted in an overhanging manner on the driving shaft, and means within the basket defining peripheral chambers for receiving an amount of liquid for balancing the unbalancing stresses due to an irregular distribution of the basket load, the improvement comprising valve means for feeding liquid to at least one of the chambers, means operably mounting the valve means on the shaft and basket for rotation in unison therewith, said basket having a portion thereof which is elastically deformable under the action of an unbalance of the rotary basket, and means directly operatEd by the deformation of such portion for actuating the valve means to feed liquid to said at least one chamber, in which there is a valve means for each chamber, each valve having a hollowed body integral with the driving shaft, said body having an outlet, a head for closing the outlet, an actuating stem secured to the valve head extending axially of the hollow body, and an operating member affixed to said elastically deformable portion operative upon deformation of said portion to actuate the stem to move the head to open the outlet, an outer tub in which the basket is located and each chamber having an outlet in direct and continuous communication with the outer tub, with the outlet of each valve extending through the outlet of each chamber into the interior thereof.
Claim 5
Dependent Claim
82 words
The device as claimed in claim 2 in which a duct located externally of the basket is affixed to the driving shaft and valve body, the driving shaft having an axial bore for feeding liquid, said axial bore being in communication with the interior of the duct to allow flow of the feeding liquid into the chamber when the head opens the valve body outlet, and spring means within the valve body normally biasing the head to close the valve body outlet.
Claim 6
Dependent Claim
23 words
The device as claimed in claim 2 including a rubber container inserted in said chamber as snugly mating the means defining the chamber.
Claim 7
Dependent Claim
43 words
The device as claimed in claim 2, in which said operating member includes a plate affixed to said elastically deformable portion in front of said actuating stem secured to the valve head, and a screw carried by said plate for actuating said stem.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |