US3828479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spindle cluster for sheet glass core drilling machine
Assignee: Unicorn Industries Ltd
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Filing: 1973-05-17
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Granted: 1974-08-13
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Expires: 1993-05-17
Abstract
Abstract A multiple spindle cluster assembly for use in association with a core drilling machine to drill a plurality of holes simultaneously in a glass sheet. A pair of such identical cluster assemblies are located on opposite sides of the sheet with the respective pairs of opposed spindles axially aligned. The respective drills are fed alternatingly into the sheet to a depth less than the thickness of the glass. Each assembly includes an adapter and at least one spindle clamp attachable to the adapter to support the spindles in parallel alignment and in a predetermined pattern and spacing relative to one another. The spindles are adjustable in an axial direction relative to one another to position the drill tips in a common plane parallel to the plane of the glass sheet.
Inventors
- 👤 C Highberg
- 👤 G Roesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:55
CPC Classifications
B; B24; B24B; B24B27/00; B24B27/06; B24B27/0641; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/167; B23B41/00; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/375; Y10T408/378; Y10T408/3788
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
Apparatus for drilling a plurality of holes simultaneously in a glass sheet with a pair of opposed drilling assemblies located on opposite sides of the sheet and adapted to be fed alternatively toward and into said sheet, comprising for each drilling assembly: a slide, means for reciprocating said slide and for applying required pressure for drilling said glass sheet a plurality of spindles and drills therefor, means operatively connected to said spindles for turning said drills at like speeds at least one adapter connected to said slide, at least one spindle clamp attachable to said adapter and cooperable therewith to support said spindles with their respective axis parallel and in a predetermined pattern and spacing relative to one another, and means operatively associated with said clamps for adjusting said spindles axially relative to one another whereby the drill tips may be positioned in a common plane parallel to said glass sheet.
Claim 2
Dependent Claim
151 words
Apparatus for drilling a plurality of holes simultaneously in a glass sheet with a pair of opposed drilling assemblies located on opposite sides of the sheet and adapted to be fed alternatively toward and into said sheet, comprising for each drilling assembly: a slide, means for reciprocating said slide and for applying required pressure for drilling said glass sheet a plurality of spindles and drills therefor, means operatively connected to said spindles for turning said drills at like speeds at least one adapter connected to said slide, at least one spindle clamp attachable to said adapter and cooperable therewith to support said spindles with their respective axis parallel and in a predetermined pattern and spacing relative to one another, and means operatively associated with said clamps for adjusting said spindles axially relative to one another whereby the drill tips may be positioned in a common plane parallel to said glass sheet.
Claim 3
Dependent Claim
50 words
Apparatus as defined in claim 1 wherein said means for applying required drilling pressure comprises a fluid cylinder, a piston in said cylinder operatively connected to said slide and fluid pressure means operatively connected to said fluid cylinder to operate said piston and said slide at a constant feed rate.
Claim 4
Dependent Claim
51 words
Apparatus as defined in claim 2 wherein said fluid pressure means comprises a fluid pressure source adapted to supply pressure substantially greater than the pressure required for drilling, and flow restricting means for controlling the feed rate to provide a constant feed rate for said drills regardless of the loads encountered.
Claim 5
Dependent Claim
57 words
Apparatus as defined in claim 1 wherein said spindles comprises cylindrical housings and wherein at least two of said spindles have flat surfaces machined in their respective housings parallel to their respective axes whereby said two spindles may be positioned with the flat surfaces of their housings abutting one another to provide minimal spacing between their axEs.
Claim 6
Dependent Claim
49 words
Apparatus as defined in claim 1 wherein said means for turning said drills at like speeds comprises a drive motor adapted to be reciprocated with said slide, at least one pulley on said motor, a belt driven by said motor pulley, and a pulley for each of said spindles.
Claim 7
Dependent Claim
30 words
Apparatus as defined in claim 5 wherein said motor has a plurality of pulleys, each of which drives a belt and wherein each belt drives at least one spindle pulley.
Claim 8
Dependent Claim
23 words
Apparatus as defined in claim 6 comprising at least three spindles and wherein at least two spindle pulleys are driven by one belt.
Claim 9
Dependent Claim
72 words
Apparatus as defined in claim 1 wherein said means for adjusting said spindles axially comprises a lateral slot formed in the respective spindle, a key adapted for engagement with said slot, a threaded element operatively connected to said key and threadedly connected to the respective spindle clamp for turning movement about an axis parallel to said spindle axis, whereby turning movement of said threaded element adjusts said spindle in an axial direction.
References Cited (Backward Citations)
US3461615A
Cited
US3746459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |