Guide tube support for rotary impact hammer

Details Guide tube support for rotary impact hammer Guide tube support for rotary impact hammer

1980-08-27

1982-10-12

Schroeder, Werner H.

Tool driving or impacting

Impacting devices

With means for rotating tool

173139, B25D 1106, B25D 1724

Patent

active

043534252

ABSTRACT:
There is disclosed a combination rotary and percussive portable tool driven by an electric motor. The percussive tool includes a reciprocating cylinder having embodied therein a reciprocatable piston striker. The cylinder is mounted in a guide tube which is spring loaded by a spring positioned between an internal wall in the housing and a cap removably mounted over an opening of the housing. The opening provides access to the housing in order to remove the guide tube and spring. With the guide tube resiliently mounted in the housing, the guide tube and its interface with the housing is much less affected by the vibration and thermal conditions developed during operation of the tool. In addition, the tolerances required to mount the guide tube in the housing do not have to be kept as tight as they would have to be if a conventional mounting arrangement using welds or other rigid fastening devices were used.

REFERENCES:
patent: 2559478 (1951-07-01), Stone
patent: 3023413 (1962-03-01), Fischer et al.
patent: 3055344 (1962-09-01), Fisher
patent: 3881554 (1975-05-01), Cooley et al.
patent: 4203446 (1980-05-01), Hufert et al.

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