Cutting apparatus and method

A device, technique of guides, used in mortise recesses, devices for holes such as cylindrical cylinder pin lockholes or round handle shaft holes, devices for hinge notches or latch plate notches, and for cutting letterboxes on facades Equipment field of opening

Inactive Publication Date: 2009-12-23
W S NORMAN ENG IOM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this guide is that it leaves a curved tip around the

Method used

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  • Cutting apparatus and method
  • Cutting apparatus and method
  • Cutting apparatus and method

Examples

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no. 1 example

[0087] The carrier 80 has a bearing block 150 that fits within a bearing block hole 160 of the carrier 80 . The bearing block 150 has a through axial hole through which the drill bit 200 can pass. According to a first embodiment, the bore is lined with a pair of low-friction bushings 159 which grip the inner surface of the bearing block 150 tightly. In a variant of the first embodiment, the bushing is glued inside the hole. A drill bit inserted through the bore is slidably rotated relative to the bushing.

[0088] The bearing block 150 is oriented so that, in use, the axis of rotation of the drill head 200 is substantially normal to the slide bar 70 and transverse to the slide rails 20,30. The bearing block is located between the rack 60 and the slide bar 70 .

[0089] Liners are made of porous metal materials such as sintered (e.g., Oilite TM Bearings) made of self-lubricating materials. In some embodiments, the bushing is made of a low friction plastic material such as ...

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Abstract

An apparatus for use in cutting a mortice pocket in a leading edge of a door in-situ, the apparatus comprising: at least one elongate guide means (60, 70); clamping means (22) for clamping the elongate guide means to a door (300) or other workpiece; a drill guide means mounted on the elongate guide means; and translating means (20, 30); wherein the drill guide means comprises a bearing block (150) and a saddle member(80), the saddle member(80) having a bearing block aperture (160) formed therethrough arranged to releasably receive the bearing block therein, the bearing block (150) having a hole therethrough adapted snugly to receive a drill shaft (200) such that the drill shaft is supported, directly or indirectly, by the bearings of the bearing block and is rotatable therein, and wherein at least one of the bearing block aperture (160) and the bearing block (150) is tapered.

Description

technical field [0001] The invention relates to an apparatus for cutting workpieces. In particular, but not exclusively, the present invention relates to apparatus for cutting mortise pockets, hinge notches or latch plate notches in vertical edges of doors. The invention also relates to apparatus for cutting holes such as cylindrical cylinder lock holes or round handle shaft holes in doors. The invention also relates to an apparatus for cutting openings for letterboxes in facades. Background technique [0002] Cutting a mortise or front panel notch in a door edge, or cutting hinge sockets, or cutting a cylindrical hole in a door face can be challenging tasks even for skilled workers. The problem is particularly acute if the cutting is done in situ, for example when installing a lock on a door that is already hung on the door. Mistakes in gouging or machining can render the entire door useless and have to be replaced. [0003] GB2238749 discloses a jig for cutting mortise...

Claims

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Application Information

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IPC IPC(8): B27F5/12B23B49/02B23B47/28B25H1/00
CPCB23B2247/12B27G13/002B27F5/12B23B49/023B23B47/287
Inventor H·G·奥斯本
Owner W S NORMAN ENG IOM
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