Abrasion-resistant hydraulic hammer with low noise level

Details Abrasion-resistant hydraulic hammer with low noise level Abrasion-resistant hydraulic hammer with low noise level

1995-11-20

1998-05-26

Smith, Scott A.

Tool driving or impacting

Impacting devices

With impact cushioning means

173128, 173219, 173171, B23B 4516

Patent

active

057552940

ABSTRACT:
There is provided an improved abrasion-resistant hydraulic hammer with a low noise level for preventing the leak-out of the noise made inside. The object is to provide an abrasion-resistant hydraulic hammer with a low noise level which can contribute to the establishment of a comfortable working environment and meet environmental standards against noise pollution by reducing leaked-out crashing sound. To achieve the object, a cylindrical plastic member containing oil is installed to a hole formed outward under a piston installed inside the hydraulic hammer, for guiding a tool in contact with the circumferential surface thereof.

REFERENCES:
patent: 3168324 (1965-02-01), Kennell
patent: 3566978 (1971-03-01), Udert
patent: 3783970 (1974-01-01), Danielson
patent: 4548278 (1985-10-01), Gidlund
patent: 4614241 (1986-09-01), Crover
patent: 4673042 (1987-06-01), Steiner
patent: 5370193 (1994-12-01), Sippus et al.
patent: 5431235 (1995-07-01), Drumheller et al.

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