SPACE HAMMER Russian patent published in 2015 - IPC B25D1/12 

FIELD: process engineering.

SUBSTANCE: invention relates to space engineering, particularly, to tools to be used by astronauts in space suits outside sealed compartment under zero-gravity conditions. Claimed hammed comprises head with cavity filled with loose filler. Cavity length is defined by the following relationship: $$L=\frac{4\left(\mathrm{0,4}÷\mathrm{0,5}\right)M}{\pi d^2\rho }\left(\mathrm{1,1}÷\mathrm{1,2}\right),$$ where M is hammer weight, d is diameter of circle inscribed in the had cross-section, c is specific density of loose filler. Note here that loose filler bulk is m = (0.4÷0.5)M while degree of cavity filling with loose filler is - l = L/(1.1÷1.2).

EFFECT: ruled our hammer recoil.

4 dwg