Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1978-10-26
1980-11-11
Schroeder, Werner H.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
B25B 2102
Patent
active
042327504
ABSTRACT:
An impact wrench comprises a casing accommodating an axially immovable anvil having impact jaws, an axial bore and a counterbore in the axial bore, a composite hammer including a driving part coupled to a motor for rotation together therewith, an outer driven part having impact jaws engageable with the impact jaws of the hammer, and an inner driven part received in the counterbore of the anvil. The outer and inner driven parts of the hammer are connected to each other and to the driving part of the hammer for combined rotation therewith and being axially movable relative to the driving part of the hammer and to the anvil. The impact wrench also comprises a device for a preliminary interaction of the hammer and anvil before engagement of their impact jaws, including spring-loaded locking members. The spring-loaded locking members are mounted in the inner driven part of the hammer in an axial space between the impact jaws of the hammer and anvil. This construction of the impact wrench results in reduced axial dimension of the tool and improved reliability.
REFERENCES:
patent: 2520920 (1950-09-01), Fosnot
patent: 2786376 (1957-03-01), Roggenburk
patent: 3760886 (1973-09-01), Mori et al.
patent: 3804180 (1974-04-01), Gelfand et al.
patent: 3952814 (1976-04-01), Gelfand et al.
Antipov Georgy A.
Galimov Apas G.
Gelfand Mikhail L.
Goldshtein Boris G.
Rutgaizer Mikhail I.
Falik Andrew M.
Schroeder Werner H.
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