Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1984-05-25
1986-11-25
Schran, Donald R.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
173 94, 173139, 173163, B25D 1500
Patent
active
046243240
ABSTRACT:
The invention relates to a turning mechanism for driving in or extracting piles by means of tangential rotary blows being imparted by a rocker arm equipped with balance weights and arranged in a rotary manner relative to the pile. In order to render superfluous the hitherto necessary noise-damping, additional damping means, damping members made from an incompressible, elastic material are used, which are placed in recesses in at least one stop of a pair of stops in such a way that there is a deformation, particularly at right angles to the impact direction, which is within the elastic limit of the member and prevents direct contact between the stop pairs. These members are arranged on all parts of the rocker arm which, in operation, form noise sources. As a result of this arrangement and construction of the incompressible, elastic members, the working noise of the turning mechanism is reduced to such an extent that it falls within the limits for residential areas, without requiring the hitherto necessary, additional damping means.
REFERENCES:
patent: 2966138 (1960-12-01), Quackenbush
patent: 3542140 (1970-11-01), Hochstrasser et al.
patent: 3727702 (1973-04-01), Snider
patent: 3880245 (1975-04-01), Anderson, Jr.
patent: 4441644 (1984-04-01), Farian
patent: 4465145 (1984-08-01), Kuhn
Hochstrasser Jurgen
Mathieu Hans
Hochstrasser Jurgen
Hochstrasser nee Wack Elisabeth
Schran Donald R.
Wolfe James L.
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