WOOD CORER DEVICE

WOOD CORER DEVICE

A WOOD CORING DRILL BIT COMPRISING A HOLLOW TUBE HAVING A INTERNAL BORE (103) AND AN EXTERIOR (100) WITH EQUALLY SPACED BODIES (10) OF SUBSTANTIALLY UNIFORM WIDTH EXTENDING IN A HELICAL MANNER FROM A CUTTING END (10) OF SAID DRILL BIT, SAID BODIES (10) DEFINING EQUALLY SPACED FLUTES (15) BETWEEN THE...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DAVID SPENCER, M L COURTNEY, TERRENCE CHARLES ELLIOTT, GARY JOHN NEVILL, IAN KENNETH BYRNE, ANTHONY MASON ADAMS
Format: Patent
Sprache:eng
Schlagworte:
ACCESSORY MACHINES OR APPARATUS
BORING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MACHINE TOOLS
MEASURING
METAL-WORKING NOT OTHERWISE PROVIDED FOR
NAILING OR STAPLING MACHINES IN GENERAL
PERFORMING OPERATIONS
PHYSICS
PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FORWOOD OR SIMILAR MATERIAL
SAFETY DEVICES, e.g. THOSE FOR SAWS
TESTING
TRANSPORTING
TURNING
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Beschreibung
Zusammenfassung:A WOOD CORING DRILL BIT COMPRISING A HOLLOW TUBE HAVING A INTERNAL BORE (103) AND AN EXTERIOR (100) WITH EQUALLY SPACED BODIES (10) OF SUBSTANTIALLY UNIFORM WIDTH EXTENDING IN A HELICAL MANNER FROM A CUTTING END (10) OF SAID DRILL BIT, SAID BODIES (10) DEFINING EQUALLY SPACED FLUTES (15) BETWEEN THE EDGES OF ADJACENT BODIES (10), EACH BODY (10) COMPRISING A LAND (20) UPSTANDING FROM A RELIEF (21) AT THE LEADING EDGE OF THE BODY (10), A RESPECTIVE CUTTING FACE (12) AND ASSOCIATED LIP (25) BEING FORMED AT THE END OF EACH BODY (10) AT SAID CUTTING END. THE WOOD CORING DRILL BIT IS CHARACTERISED BY HAVING THREE EQUALLY SPACED BODIES (10) AND FLUTES (15) SAID CUTTING FACE (12) HAS A INCLUDING ANGLE WHICH IS PREFERABLY 1250 FOR HARDWOOD AND DRYWOOD AND 112? FOR SOFTWOOD. THE LIP (25) HAS A LIP CLEARANCE ANGLE THAT IS ABOUT 6?: 10, THE LANDS (20) ON THE BODIES (10) EXTEND FOR AN AXIAL DISTANCE OF ABOUT 65 MM : 5 MM FROM SAID CUTTING END (101) AND THE INTERNAL BORE (103) OF THE HOLLOW TUBE IS TAPERED OUTWARDLY FROM OR ADJACENT THE CUTTING END (101) (FIG. 1)