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US3945226A Expired / Lapsed US ⏱️ 0.0 years remaining

Tub and drum of a washing-machine

Assignee: Whirlpool International BV
•
Filing: 1974-02-13
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Granted: 1976-03-23
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Expires: 1994-02-13
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Abstract

Abstract A tub for a washing and spin-drying machine having a horizontal spin axis. The flanks of the tub are attached to a cylindrical part by a conical portion; the cross-section of the tub in a plane through the spin axis is rectangular with flattended corners.

Inventors

  • 👤 Philippe de Hedouville

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 02:49
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/26; D06F37/267; D06F37/268; D06F37/02; D06F37/04; D06F37/269

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 203 words
A laundry washing and spin-drying machine having a high ratio of drum volume to housing width, comprising a housing, a tub, means for resiliently mounting said tub within said housing, a drum mounted within said tub for rotation about a horizontal axis, means for driving said drum at agitating speed for washing and at high speed for spin-drying, and means for obtaining access to the interior of the drum to insert and remove laundry, said tub comprising: a cylindrical part having two end edges; two flanks, each of said flanks comprising a truncated conical surface extending outward, said truncated surface having a large base edge and a small base edge, said base edges lying in parallel planes, the large base edge of each flank adjoining a respective end edge of the cylindrical part, each flank further comprising a substantially planar surface having an outer edge fixed to said small base edge; and means for fixing each large base edge to the respective end edge, said fixing means being entirely located inwardly of the plane in which said small base edge lies, whereby said fixing means has adequate clearance from said housing despite angular movements of said axis due to laundry unbalance during spin-drying.
Claim 2
Dependent Claim 203 words
A laundry washing and spin-drying machine having a high ratio of drum volume to housing width, comprising a housing, a tub, means for resiliently mounting said tub within said housing, a drum mounted within said tub for rotation about a horizontal axis, means for driving said drum at agitating speed for washing and at high speed for spin-drying, and means for obtaining access to the interior of the drum to insert and remove laundry, said tub comprising: a cylindrical part having two end edges; two flanks, each of said flanks comprising a truncated conical surface extending outward, said truncated surface having a large base edge and a small base edge, said base edges lying in parallel planes, the large base edge of each flank adjoining a respective end edge of the cylindrical part, each flank further comprising a substantially planar surface having an outer edge fixed to said small base edge; and means for fixing each large base edge to the respective end edge, said fixing means being entirely located inwardly of the plane in which said small base edge lies, whereby said fixing means has adequate clearance from said housing despite angular movements of said axis due to laundry unbalance during spin-drying.
Claim 3
Dependent Claim 32 words
A machine as claimed in claim 1, wherein said fixing means lies in a plane parallel to the planes in which said large and small bases lie, closer to the large base.
Claim 4
Dependent Claim 42 words
A machine as claimed in claim 2, wherein said drum is mounted in bearings fitted in a dished central portion of each flank, and said substantially planar surface is an annular surface having an inner surface connected to said dish central portion.
Claim 5
Dependent Claim 200 words
A machine as claimed in claim 3, wherein said drum is concentric within said tub, and comprises a cylindrical part and two flanks having a configuration corresponding to those of the tub, each drum flank being adjacent a respective tub flank, said drum flanks each comprising a truncated conical surface extending outward, said drum flank truncated surface having a large base edge and a small base edge, said drum base edges lying in parallel planes, the large base edge of each drum flank adjoining a respective end edge of the cylindrical part, each drum flank further comprising a substantially planar surface having an outer edge fixed to said small drum flank base edge; and means for fixing each large drum base edge to the respective drum end edge, said fixing means being entirely located inwardly of the plane in which said drum small base edge lies, each tub and drum flank conical surface having an included angle, the included angle of each drum conical part being at least as small as the included angle of the corresponding conical part of the respective tub flank, whereby said drum has a volume which is maximized in comparison with that of the tub.

References Cited (Backward Citations)

US285934A Cited
US2213453A Cited
US2323765A Cited
FR1213067A Cited
US2904982A Cited
FR1407860A Cited
US3276229A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-03-23 1979-09-22 1980-03-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-03-23 1983-09-22 1984-03-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-03-23 1987-09-22 1988-03-23 $7700.00 Window Closed / Lapsed

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