Pneumatically operated rammer
AssigneeM-B-W Inc.
InventorRobert M. Motl
Life of this patent
Estimating the term…
Abstract
A pneumatically operated percussion apparatus for compacting soil, or other material. The apparatus includes a gear case that supports a percussion unit that is adapted to engage the soil to compact the same. A pneumatically operated motor is mounted on the gear case and air is supplied to the motor via a manually-operated "deadman" valve unit. A centrifugal clutch connects the output shaft of the motor to the percussion unit. The air flow to the motor is controlled by a governor to obtain a substantially uniform rotational speed for the motor output shaft.
Claims12
A pneumatically operated percussion apparatus for compacting soil and other materials, comprising a supporting structure, a percussion unit mounted on the supporting structure and including a percussion member disposed to engage the soil, a pneumatic motor mounted on the supporting structure and having an output shaft, air supply conduit means for supplying air under pressure to said motor, manually operated valve means mounted on the supporting structure and disposed to open and close said air supply conduit means, centrifugal clutch means interconnecting said output shaft and said percussion unit, and speed governing means interconnecting said valve means and said motor for controlling the supply of air to said motor to obtain a substantially constant speed of rotation for said output shaft.
A pneumatically operated percussion apparatus for compacting soil and other material, comprising a gear case, a percussion unit mounted on the gear case and including reciprocating ram means to engage the soil, a pneumatic motor mounted on the gear case and including a rotor having an output shaft, an air supply conduit connecting a source of air under pressure with said motor, manually operated valve means mounted on the gear case and operably connected in said air supply conduit and disposed to open and close said air supply conduit, air control means disposed in said air supply conduit between said valve means and said motor for controlling the flow of air through said air supply conduit to the rotor and providing a substantially uniform rotational speed for said output shaft, and connecting means connecting said output shaft with said ram means and converting rotation of said output shaft to reciprocating motion of said ram means, said connecting means including a centrifugal clutch.
Dependencies are inferred from the claim text.