US 5,887,665 A · Striking element

Abstract

The striking element (1) according to the invention serves for the production of shocks which act on a tool. It has a body (3) with a plurality of parallel bores (4). A piston (2), heavy in mass, runs pressure-tight in each of these bores (4) and strikes stops which may be mounted without or within the piston (2). An end space (9) lies at each of the faces of the piston (2). The pistons (2) serve to control the function of the striking element (1). At least one of the pistons (2) produces shocks on the tool. The striking element may execute working shocks in the direction of the tool and, in a special embodiment, execute loosening shocks in the opposite direction. In a special embodiment the magnitude of the energy of loosening shocks may be adjusted or suppressed. The striking element is employed principally in surgery, but also in the general manufacture of apparatus.

Claims26

Dependent claims

A striking element for producing mechanical shocks for transmission to a tool comprising:

a body having a first bore and a second bore;
stops fastened to the body and located at each end of said bores;
a first piston in said first bore and a second piston in said second bore, each of said pistons having faces and being mounted to travel pressure-tight in its bore, the length of each of said pistons being less than the distance between stops located at the end of the associated bore, leaving an end space remaining between the faces of each of said pistons and the stops;
and
a shank supporting said tool and passing axially through the first bore;
the striking element being actuable by a medium supplied under pressure to cause the pistons to deliver the mechanical shocks;
wherein
said first piston is annular and radially surrounds said shank;
wherein said shank is provided with a pair of shank stops located within said piston and said first piston strikes one or the other of said shank stops, depending upon the direction of said first piston's longitudinal motion within said first bore.

6 more elements

Dependencies are inferred from the claim text.

Striking element

Life of this patent

Striking element

Life of this patent

Abstract

Claims26