US4605345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus with wall-covering protection
Assignee: Individual
•
Filing: 1984-05-25
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Granted: 1986-08-12
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Expires: 2004-05-25
Abstract
Abstract A protective device for a fabric or other soft wall covering upon the drilling of a hole therethrough into a support wall behind the covering has a sleeve which closely surrounds the drill bit, a spring braced against the sleeve and a roller bearing to permit immobilization of the sleeve as the drill bit rotates and is axially displaced in the latter. The sleeve has a circular array of pins projecting from its face turned away from the chuck and adapted to penetrate the wall covering. A light supplementary spring can be provided on this side of the sleeve as well to compress the wall covering.
Inventors
- 👤 Michel Giughese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:46
CPC Classifications
B; B23; B23B; B23B51/00; B23B35/00; B23B35/005; B23B2260/00; B23B2260/122; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5623; Y10T408/56245; Y10T408/96; Y10T408/97
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
221 words
A tool for use in interior decoration for the drilling of a hole in a support covered by a yieldable and tearable covering, the tool comprising: a chuck member rotatable about an axis; a solid drill bit received coaxially in said chuck member and adapted to bore axially forward into said support and having a front end remote from said chuck member for penetrating axially forward through said covering into said support when pressed axially forward thereagainst while rotating about the axis; a covering-protective sleeve member closely surrounding said bit and having a front face turned away from said chuck member a multiplicity of pins projecting axially forward from said face and forming respective axially forwardly directed points distributed uniformly in at least one circle around said bit for piercing said covering, lodging in said support, and holding said sleeve member out of contact with said covering; a coil spring surrounding said bit and braced axially between said sleeve member and said chuck member and enabling travel of said bit through said sleeve member with compression of said spring; and at least one bearing operatively connected between one of said members and said spring to enable rotation of said chuck member and said bit while permitting said sleeve member to be immobilized by said points upon engagement of said covering therewith.
Claim 2
Dependent Claim
221 words
A tool for use in interior decoration for the drilling of a hole in a support covered by a yieldable and tearable covering, the tool comprising: a chuck member rotatable about an axis; a solid drill bit received coaxially in said chuck member and adapted to bore axially forward into said support and having a front end remote from said chuck member for penetrating axially forward through said covering into said support when pressed axially forward thereagainst while rotating about the axis; a covering-protective sleeve member closely surrounding said bit and having a front face turned away from said chuck member a multiplicity of pins projecting axially forward from said face and forming respective axially forwardly directed points distributed uniformly in at least one circle around said bit for piercing said covering, lodging in said support, and holding said sleeve member out of contact with said covering; a coil spring surrounding said bit and braced axially between said sleeve member and said chuck member and enabling travel of said bit through said sleeve member with compression of said spring; and at least one bearing operatively connected between one of said members and said spring to enable rotation of said chuck member and said bit while permitting said sleeve member to be immobilized by said points upon engagement of said covering therewith.
Claim 3
Dependent Claim
50 words
The tool defined in claim 1 wherein said spring is braced at one end against said chuck member and at its opposite end against an inner race of said bearing, said sleeve being formed with a recess receiving said bearing, said bearing having an outer race fitted into said recess.
Claim 4
Dependent Claim
37 words
The tool defined in claim 1, further comprising a casing surrounding said bit proximal to said chuck member, said bearing being received in said casing, said spring being braced against said casing and against said sleeve member.
Claim 5
Dependent Claim
40 words
The tool defined in claim 3 wherein a supplementary spring is mounted on said sleeve member and surrounds said pins while yieldably extending in the direction of said pins for compression upon pressing of said sleeve member against said covering.
Claim 6
Dependent Claim
40 words
The tool defined in claim 2 wherein a supplementary spring is mounted on said sleeve member and surrounds said pins while yieldably extending in the direction of said pins for compression upon pressing of said sleeve member against said cover.
Claim 7
Dependent Claim
24 words
The tool defined in claim 4 wherein said sleeve member is provided with a circumferential groove, said supplementary spring being received in said groove.
Claim 8
Dependent Claim
24 words
The tool defined in claim 5 wherein said sleeve member is provided with a circumferential groove, said supplementary spring being received in said groove.
Claim 9
Dependent Claim
35 words
The tool defined in claim 1 wherein at least twelve such pins are provided in an equispaced relationship in a circle surrounding a bore traversed by said bit and extending centrally through said sleeve member.
Claim 10
Dependent Claim
15 words
The tool defined in claim 1 wherein said sleeve member is composed of a polyamide.
Claim 11
Dependent Claim
34 words
The tool defined in claim 1 wherein said sleeve member is provided with a central bore traversed by said bit and of a diameter substantially 0.1 mm greater than the diameter of said bit.
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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |