US3818648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-change wheel guard for tool and cutter grinder
Assignee: Milacron Inc
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Filing: 1973-01-10
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Granted: 1974-06-25
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Expires: 1993-01-10
Abstract
Abstract A quick-change guard for machine tools supporting a rotating tool, the guard having a backplate located perpendicular to the axis of and to the rear of the rotating tool, the backplate being cup-shaped with the cupped portion partially enveloping the cutting tool. The cupped portion is further suited to receive an energy absorbing liner interposed between the cutting tool and the inner surface of the cupped portion for substantially dissipating the energy of broken tool fragments in the event of wheel fracture. The quick-change guard further includes a ring releasably secured to the outer surface of said cupped portion, the ring encircling the tool and containing a shield extending therefrom to enclose a substantial portion of the rotating tool.
Inventors
- 👤 W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:16
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
A quick-change guard for a tool and cutter grinder having a rotating grinding wheel, said guard comprising: a. a cup-shaped backplate forming a primary shield, the base of which is located perpendicular to the axis of and to the rear of the rotating wheel, said backplate fixedly secured to the tool and cutter grinder; b a secondary shield; c a plurality of studs secured to the secondary shield and placed in one quadrant of the periphery of the secondary shield; d a channel around the periphery of said backplate suited to receive said studs; e a spring designed to fit within said channel and secured to the secondary shield in a quadrant opposite said stud quadrant whereby release of the spring secures said secondary shield to said backplate; and f a face plate extending from said secondary shield and enclosing a predetermined portion of said wheel.
Claim 2
Dependent Claim
146 words
A quick-change guard for a tool and cutter grinder having a rotating grinding wheel, said guard comprising: a. a cup-shaped backplate forming a primary shield, the base of which is located perpendicular to the axis of and to the rear of the rotating wheel, said backplate fixedly secured to the tool and cutter grinder; b a secondary shield; c a plurality of studs secured to the secondary shield and placed in one quadrant of the periphery of the secondary shield; d a channel around the periphery of said backplate suited to receive said studs; e a spring designed to fit within said channel and secured to the secondary shield in a quadrant opposite said stud quadrant whereby release of the spring secures said secondary shield to said backplate; and f a face plate extending from said secondary shield and enclosing a predetermined portion of said wheel.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein there is further comprised a positive stop secured to said secondary shield for facilitating placement of the secondary shield with respect to the backplate.
Claim 4
Dependent Claim
27 words
The apparatus of claim 1 wherein there is furtheR comprised a deformable liner placed within the cup-shaped backplate and interposed between said backplate and the grinding wheel.
Claim 5
Dependent Claim
99 words
A quick change guard comprised in part of a cup shaped primary shield attached to a machine tool and a cylindrical secondary shield, said secondary shield having a faceplate to enclose a predetermined portion of rotating tool, wherein the improvement comprises: a a plurality of studs attached to an interior surface of the secondary shield and located along a circumferential line in a first quadrant of the secondary shield; b an annular channel located on an exterior surface of the primary shield for receiving said studs; and c means for releasably securing said secondary shield to said primary shield.
Claim 6
Dependent Claim
99 words
A quick change guard comprised in part of a cup shaped primary shield attached to a machine tool and a cylindrical secondary shield, said secondary shield having a faceplate to enclose a predetermined portion of rotating tool, wherein the improvement comprises: a a plurality of studs attached to an interior surface of the secondary shield and located along a circumferential line in a first quadrant of the secondary shield; b an annular channel located on an exterior surface of the primary shield for receiving said studs; and c means for releasably securing said secondary shield to said primary shield.
Claim 7
Dependent Claim
99 words
The apparatus of claim 4 wherein the means for releasably securing comprises: a a slot in the secondary shield located along the circumferential line opposite the first quadrant; and b a leaf spring having one end configured to form a loop and being attached to the secondary shield at a location permitting the loop to pass through the slot and to engage the channel in the primary shield, whereby said spring secures said secondary shield to said primary shield and flexing of the spring to remove the loop from the channel releases the secondary shield from the primary shield.
Claim 8
Dependent Claim
41 words
The apparatus of claim 5 wherein the improvement further comprises a second plurality of studs attached to the inside surface of the secondary shield along a second circumferential line to facilitate locating the secondary shield with respect to the primary shield.
Claim 9
Dependent Claim
36 words
The apparatus of claim 6 wherein the improvement further comprises a deformable liner placed circumferentially along an interior surface of the primary shield whereby said liner is interposed between said primary shield and the rotating tool.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |