초록 ▼

A hand-held tool including an electromagnetic hammer mechanism (1) for applying a percussion movement to a working tool (3) and including at least one stator, at least one coil (4a), a striking piston formed as a yoke (10) supported in a magnetic flux for a limited displacement along the oscillation

A hand-held tool including an electromagnetic hammer mechanism (1) for applying a percussion movement to a working tool (3) and including at least one stator, at least one coil (4a), a striking piston formed as a yoke (10) supported in a magnetic flux for a limited displacement along the oscillation axis (A) and having at least one magnetomotive region (11) formed of a soft magnetic ferroelectric material, and at least one magnet (5a) associated with the stator, magnetizable along the oscillation axis (A), and arranged along and adjacent to at least one segment of the coil (4a) located at an end of the stator.

대표청구항 ▼

A hand-held tool including an electromagnetic hammer mechanism (1) for applying a percussion movement to a working tool (3) and including at least one stator, at least one coil (4a), a striking piston formed as a yoke (10) supported in a magnetic flux for a limited displacement along the oscillation

A hand-held tool including an electromagnetic hammer mechanism (1) for applying a percussion movement to a working tool (3) and including at least one stator, at least one coil (4a), a striking piston formed as a yoke (10) supported in a magnetic flux for a limited displacement along the oscillation axis (A) and having at least one magnetomotive region (11) formed of a soft magnetic ferroelectric material, and at least one magnet (5a) associated with the stator, magnetizable along the oscillation axis (A), and arranged along and adjacent to at least one segment of the coil (4a) located at an end of the stator. steps of: (a) forming a choke element which defines a choke orifice having a flow area which is less than the flow area of the seat orifice; and (b) placing the choke element in registry with the valve mounting surface so that the choke element is spaced from the check valve. 40. A method as claimed in claim 39; and (c) insering a resilient ring into a slot defined by the seat to thereby restrain movement of the choke element relative to the seat.