US5214820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dish scrubber
Assignee: Individual
•
Filing: 1992-05-05
•
Granted: 1993-06-01
•
Expires: 2012-05-05
Abstract
Abstract A dish scrubber has an elongated handle and a cylindrical scrubbing element attached at one end to the handle. The scrubbing element is of laminar configuration having a leading layer of scouring material glued to an underlying layer of foam. The element is longitudinally grooved to provide circumferentially spaced teeth with cutting edges. The scrubber is configured so that the scouring layer contacts the bottom and the cutting edges contact the sides to clean the interior cavity of a coffee mug or similar cylindrical dishware cavity.
Inventors
- 👤 Craig S. Shumway
- 👤 Amy Shumway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:37
CPC Classifications
A; A47; A47L; A47L17/00; A47L13/00; A47L13/10; A47L13/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
133 words
A handled dish scrubber suitable for cleaning dishware internal cavities, comprising: a handle elongated in a longitudinal direction and having opposite ends; and a cylindrical scrubbing element coaxially mounted at one end of the handle; the scrubbing element being of laminate construction including a cylindrical inner layer of foam material and a cylindrical outer layer of scouring material superposed in matching coaxial relationship over the inner layer, in a position longitudinally outward of the inner layer relative to the other end of the handle; and the scrubbing element further having a solid central core region and an annular region circumferentially surrounding the core region; the annular region having a plurality of grooves extending in the longitudinal direction and defining a corresponding plurality of longitudinally extending cutting edges circumferentially spaced about the core region.
Claim 2
Dependent Claim
133 words
A handled dish scrubber suitable for cleaning dishware internal cavities, comprising: a handle elongated in a longitudinal direction and having opposite ends; and a cylindrical scrubbing element coaxially mounted at one end of the handle; the scrubbing element being of laminate construction including a cylindrical inner layer of foam material and a cylindrical outer layer of scouring material superposed in matching coaxial relationship over the inner layer, in a position longitudinally outward of the inner layer relative to the other end of the handle; and the scrubbing element further having a solid central core region and an annular region circumferentially surrounding the core region; the annular region having a plurality of grooves extending in the longitudinal direction and defining a corresponding plurality of longitudinally extending cutting edges circumferentially spaced about the core region.
Claim 3
Dependent Claim
22 words
A handled dish scrubber as in claim 1, wherein the cutting edges are circumferentially spaced at equiangular positions about the core region.
Claim 4
Dependent Claim
29 words
A handled dish scrubber as in claim 2, wherein the foam material comprises a double cell polyurethane foam material, and the scouring material comprises a non-scratching nylon mesh material.
Claim 5
Dependent Claim
26 words
A handled dish scrubber as in claim 3, wherein the layer of foam material is at least 10 times thicker than the layer of scouring material.
Claim 6
Dependent Claim
25 words
A handled dish scrubber as in claim 4, wherein the diameter of the core region is a majority of the diameter of the scrubbing element.
Claim 7
Dependent Claim
33 words
A handled dish scrubber as in claim 5, wherein the grooves define flutes that separate lands between flutes of the annular region into teeth having radially directed tooth faces presenting the cutting edges.
Claim 8
Dependent Claim
22 words
A handled dish scrubber as in claim 6, wherein the cutting edges are parallel to a longitudinal axis of the scrubbing element.
Claim 9
Dependent Claim
19 words
A handled dish scrubber a in claim 7, wherein the cutting edges are provided with positive radial rake angles.
Claim 10
Dependent Claim
16 words
A handled dish scrubber as in claim 8, wherein the tooth faces are made slightly convex.
Claim 11
Dependent Claim
21 words
A handled dish scrubber as in claim 9, wherein the widths of the lands behind the cutting edges are left unrelieved.
Claim 12
Dependent Claim
29 words
A handled dish scrubber as in claim 10, wherein the arcuate distance of the grooves at the scrubbing element outside diameter is one-third the arcuate distance of the teeth.
Claim 13
Dependent Claim
173 words
A handled dish scrubber suitable for cleaning dishware internal cavities, comprising: a handle elongated in a longitudinal direction and having opposite ends; and a cylindrical scrubbing element coaxially mounted at one end of the handle; the scrubbing element being of laminate construction, including a cylindrical inner layer of foam material and a cylindrical outer layer of scouring material superposed in matching coaxial relationship over the inner layer, in a position longitudinally outward of the inner layer relative to the other end of the handle; the inner layer having a thickness substantially greater than a corresponding thickness of the outer layer; and the scrubbing element further having a uniform cross-section, with a solid core region and an annular region circumferentially surrounding the core region; the annular region having a plurality of grooves extending in the longitudinal direction and defining a corresponding plurality of longitudinally extending cutting edges circumferentially spaced at equiangular positions about the core region; and the core region having a diameter which is at least one-half the diameter of the scrubbing element.
Claim 14
Dependent Claim
173 words
A handled dish scrubber suitable for cleaning dishware internal cavities, comprising: a handle elongated in a longitudinal direction and having opposite ends; and a cylindrical scrubbing element coaxially mounted at one end of the handle; the scrubbing element being of laminate construction, including a cylindrical inner layer of foam material and a cylindrical outer layer of scouring material superposed in matching coaxial relationship over the inner layer, in a position longitudinally outward of the inner layer relative to the other end of the handle; the inner layer having a thickness substantially greater than a corresponding thickness of the outer layer; and the scrubbing element further having a uniform cross-section, with a solid core region and an annular region circumferentially surrounding the core region; the annular region having a plurality of grooves extending in the longitudinal direction and defining a corresponding plurality of longitudinally extending cutting edges circumferentially spaced at equiangular positions about the core region; and the core region having a diameter which is at least one-half the diameter of the scrubbing element.
References Cited (Backward Citations)
US1804240A
Cited
FR1115137A
Cited
US2941225A
Cited
US3317944A
Cited
GB1188381A
Cited
US3646628A
Cited
US4055897A
Cited
US4190921A
Cited
US4856136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |