BRAKING SYSTEM

A braking system for a powered rotary tool of the type in which a shaft is rotated about an axis by a motor, comprises (i) a first brake element mounted for rotation with said shaft; (ii) a second brake element which is restrained from rotation; (iii) resilient means urging said first brake element...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	THOMAS, W. ROGER, TEMPLE, MELVIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS FISHING FORESTRY GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HARVESTING HEATING HUMAN NECESSITIES HUNTING LIGHTING MECHANICAL ENGINEERING MOWING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS THERMAL INSULATION IN GENERAL TRAPPING WEAPONS
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Beschreibung
Zusammenfassung:	A braking system for a powered rotary tool of the type in which a shaft is rotated about an axis by a motor, comprises (i) a first brake element mounted for rotation with said shaft; (ii) a second brake element which is restrained from rotation; (iii) resilient means urging said first brake element in an axial direction into braking contact with said second brake element and (iv) means to release the braking contact between said first brake element and said second brake element on start-up of said motor. On start-up of said motor, said shaft is free to rotate through a small angle of rotation before rotation of said first brake element is initiated, and said means for releasing the braking contact on start-up of said motor comprises at least one pair of co-operating ramp surfaces one of said or each pair of ramp surfaces being arranged for rotation with said shaft and said co-operating ramp surface being arranged for rotation with said first brake element. The braking system is particularly suitable for use an a lawn mower of the rotary type.