초록 ▼

An impulse tool (20) having a housing (22), a motor (26), drive mechanism (30), impulse mechanism (28), trigger mechanism (67), and sensor (32) for automatic shut-off is disclosed. The sensor (32) uses a spring-biased ball (144) that sits on a ball seat (149) adjacent an entry orifice (108) and a sp

An impulse tool (20) having a housing (22), a motor (26), drive mechanism (30), impulse mechanism (28), trigger mechanism (67), and sensor (32) for automatic shut-off is disclosed. The sensor (32) uses a spring-biased ball (144) that sits on a ball seat (149) adjacent an entry orifice (108) and a spring-biased piston (112) such that when a predetermined non-transient torque is reached, the strength, duration and frequency of pulses of the working fluid entering the entry orifice (108) will lift the ball (144) sufficiently to impose on the piston (112) and to progressively lift the piston (112) to allow the working fluid to a triggering height which starts the shut-off of the impulse tool (20). A delay mechanism is also disclosed that may include a regulator (172), dashpot (170), spring latch (204), and trigger bar (56) or latch. A method of cooling an impulse tool with cold, dense air throughout is also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] A method of cooling a compressible-fluid-operated tool having an entry orifice and an exhaust orifice, the method comprising the steps of:supplying a compressible fluid to the interior of the tool through the entry orifice; andproviding a shut-off means that substantially

[ What is claimed is:] [1.] A method of cooling a compressible-fluid-operated tool having an entry orifice and an exhaust orifice, the method comprising the steps of:supplying a compressible fluid to the interior of the tool through the entry orifice; andproviding a shut-off means that substantially closes the exhaust orifice allowing the fluid to build to a substantially uniform pressure throughout the tool thereby causing the fluid to compress and be held in the interior of the tool.