US3594958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector for grinding tool
Assignee: Rexnord Industries LLC
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Filing: 1969-02-03
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Granted: 1971-07-27
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Expires: 1989-02-03
Abstract
Abstract The disclosure is directed to an improved dust collector for a manually operable grinder comprising a hood overlying the top of a cupstone grinding wheel and having a depending skirt to form a dust-collecting chamber and at least one passage through the back wall of the cupstone wheel for connecting its hollow center to the dust-collecting chamber. With the added passages in the back wall of the cupstone wheel the edge of the depending skirt of the hood may be located at a height so as not to interfere with the use of the lower peripheral edge of the wheel.
Inventors
- 👤 Guy F Cusumano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:01
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/06; B24B55/10; B24B55/102
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A grinding tool having a cup-shaped grinding Stone with a continuous back and sidewalls to form a hollow center, a motor connected to rotate the cupstone wheel, a hood overlying the backwall of the cupstone wheel in spaced relation thereto to form a chamber therebetween, said hood having a depending skirt overlying the outer periphery of the backwall of the cupstone wheel in spaced relation thereto to form an annular passage therebetween, the backwall of the cupstone wheel having a plurality of unobstructed openings therein between its hollow center and the chamber, and means for producing a partial vacuum in the chamber to cause dust produced by the cupstone wheel to flow into the dust-collecting chamber through the annular passage around the periphery of the cupstone and the openings from the hollow center.
Claim 2
Dependent Claim
133 words
A grinding tool having a cup-shaped grinding Stone with a continuous back and sidewalls to form a hollow center, a motor connected to rotate the cupstone wheel, a hood overlying the backwall of the cupstone wheel in spaced relation thereto to form a chamber therebetween, said hood having a depending skirt overlying the outer periphery of the backwall of the cupstone wheel in spaced relation thereto to form an annular passage therebetween, the backwall of the cupstone wheel having a plurality of unobstructed openings therein between its hollow center and the chamber, and means for producing a partial vacuum in the chamber to cause dust produced by the cupstone wheel to flow into the dust-collecting chamber through the annular passage around the periphery of the cupstone and the openings from the hollow center.
Claim 3
Dependent Claim
82 words
A grinding tool in accordance with claim 1 comprising a frame, a motor mounted on the frame and having a shaft with a threaded end, the cupstone wheel having a tapped fitting, the hood being supported on the frame in spaced relation to the backwall of the cupstone and having a depending skirt overlying the upper periphery of the cupstone in spaced relation thereto, and the means for producing a partial vacuum comprising a suction line and a source of partial vacuum.
Claim 4
Dependent Claim
79 words
A grinding tool in accordance with claim 1 in which the cupstone has an outer periphery in the form of a truncated cone, and the skirt of the hood depending to overly the top of the sidewall of the cupstone for a short distance only so that the angular corner at the bottom of the cupstone projects outwardly beyond the skirt whereby to prevent the depending skirt from interfering with the use of the corner edge of the stone.
Claim 5
Dependent Claim
73 words
A grinding tool in accordance with claim 1 in which the cupstone has an outer periphery in the form of a right cylinder, the depending skirt of the hood overlapping the top of the sidewall of the cupstone for a short distance only so that the angular corner at the bottom of the cupstone can be tilted to engage the surface of a workpiece without interference by the depending skirt of the hood.
Claim 6
Dependent Claim
98 words
A grinding tool comprising, in combination, a frustoconical grinding wheel having relatively small diameter and a relatively large diameter end surfaces, a motor connected to rotate said wheel, a hood positioned adjacent to said small diameter surface to form a chamber therebetween, said hood having a depending skirt extending a short distance only along the conical surface of said wheel and spaced therefrom to form an annular passage, and means for producing a partial vacuum in said chamber to cause dust produced by the grinding action of said wheel to flow through said annular passage into said chamber.
Claim 7
Dependent Claim
98 words
A grinding tool comprising, in combination, a frustoconical grinding wheel having relatively small diameter and a relatively large diameter end surfaces, a motor connected to rotate said wheel, a hood positioned adjacent to said small diameter surface to form a chamber therebetween, said hood having a depending skirt extending a short distance only along the conical surface of said wheel and spaced therefrom to form an annular passage, and means for producing a partial vacuum in said chamber to cause dust produced by the grinding action of said wheel to flow through said annular passage into said chamber.
Claim 8
Dependent Claim
47 words
A grinding tool according to claim 5 wherein the diameter of said large diameter surface is greater than the diameter of the lower periphery of said skirt to prevent said hood from interfering with usage of the peripheral portions of said wheel near said large diameter surface.
Claim 9
Dependent Claim
106 words
A grinding tool comprising, in combination, a frustoconical cupstone grinding wheel having a continuous back and sidewalls cooperating to define a central cavity therein, a motor connected to rotate said wheel, a hood positioned adjacent to said backwall to form a chamber therebetween, said hood having a depending skirt that extends a short distance only along the conical surface of said grinding wheel, a plurality of passages extending through said backwall from said cavity to said chamber and means for producing a partial vacuum in said chamber to cause dust produced by the grinding action of said wheel to flow through said passages into said chamber.
Claim 10
Dependent Claim
106 words
A grinding tool comprising, in combination, a frustoconical cupstone grinding wheel having a continuous back and sidewalls cooperating to define a central cavity therein, a motor connected to rotate said wheel, a hood positioned adjacent to said backwall to form a chamber therebetween, said hood having a depending skirt that extends a short distance only along the conical surface of said grinding wheel, a plurality of passages extending through said backwall from said cavity to said chamber and means for producing a partial vacuum in said chamber to cause dust produced by the grinding action of said wheel to flow through said passages into said chamber.
Claim 11
Dependent Claim
43 words
A grinding wheel according to claim 7 wherein the maximum diameter of said wheel is greater than the maximum diameter of said skirt to prevent said hood from interfering with usage of the larger diameter portions of the conical surface of said wheel.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |