US 4,382,634 A · Material fracturing apparatus

Abstract

An impacting apparatus (10) for fracturing material includes a housing (14) and a fracturing shank (12) which is mounted adjacent the housing (14) so as to reciprocate about a pivot axis (24). The fracturing shank (12) has an impact receiving portion (28) and a sealing portion (26). The sealing portion (26) has a cylindrical sealing surface (26a) which is arranged about a longitudinal axis (26b). Such longitudinal axis (26b) is perpendicular to a radial line (33) extending from the pivot axis (24) and is inclined at a predetermined angle to a longitudinal axis (28b) extending through the impact receiving portion (28). An annular seal (16) is connected to the sealing surface (26a) and the housing (14) to obstruct the passage of material into and out of the housing (14). The seal (16) has a flexible portion (40) whose inner margin (46) lies along the radial line (33 ).

Claims11

Dependent claims

An impact apparatus (10) for delivering intermittent impact blows comprising:

a housing (14);
a fracturing shank (12) reciprocatably mounted about a pivot axis (24), said shank (12) being reciprocatable along a reciprocation path and having a sealing portion (26), said sealing portion (26) having a cylindrical sealing surface (26a) disposed about a longitudinal axis (26b) which is perpendicular to a radial line (33) extending from said pivot axis (24);
and
an annular seal (16) connected to said shank's sealing surface (26a) and said housing (14) to prevent ingress of foreign matter into said housing (14) and egress of lubricating fluid from said housing (14), said seal (16) having a longitudinal axis (16a) and a flexible portion (40) which is bounded by an inner margin (46) which lies along said radial line (33).

1 more element

Dependencies are inferred from the claim text.

Material fracturing apparatus

Life of this patent

Material fracturing apparatus

Life of this patent

Abstract

Claims11