Pneumatic bar feeding apparatus for feeding a length of bar stock to a lathe or the like

A bar feeding apparatus comprising:

• a. an elongated hollow outer tubular member;
• b. an elongated hollow inner tubular member adapted to receive a length of bar stock therein, the inner tubular member disposed within said outer tubular member and spaced from an interior surface of said outer tubular member by a plurality of spaced apart bearing and bushing members for permitting the inner tubular member to rotate when the bar stock is rotating and preventing noise and vibration;
• c. an elongated hollow housing for housing said inner and outer tubular members;
• d. a slidable bar carrier disposed within said inner tubular member for receiving one end of the bar stock and having a plurality of step-down interior portions for accommodating a plurality of different size diameters of the bar stock and a central opening extending through to the plurality of step-down interior portions;
• e. an actuating assembly including a slidable piston, an elongated rod connected to the piston and biasing means for biasing the rod, the actuating assembly disposed within said inner tubular member and located behind said bar carrier for longitudinal movement therein, where the rod is aligned with said central opening of said bar carrier and the biasing means biasing the rod from engaging with said bar stock before said bar carrier reaches a front end of said inner tubular member;
• and
• f. means for supplying fluid under pressure within said inner tubular member and thereby cause said piston and said rod to advance longitudinally within said inner tubular member which in turn pushes said bar carrier, which in turn pushes the bar stock to a processing machine for processing, where said rod can further enter into said opening of said bar carrier to engage the one end of the bar stock to further advance the bar stock to the processing machine so that no material of the bar stock is left within said inner tubular member;
• g. whereby said bar feeding apparatus prevents vibrations and noise from generating when said bar feeding apparatus is in operation.

A bar feeding apparatus comprising:

• a. an outer tubular member;
• b. an inner tubular member adapted to receive a length of bar stock therein, the inner tubular member disposed within said outer tubular member and spaced from an interior surface of said outer tubular member by at least three bearing and bushing members for permitting the inner tubular member to rotate when the bar stock is rotating and preventing noise and vibration;
• c. a slidable bar carrier disposed within said inner tubular member for receiving one end of the bar stock and having a plurality of step-down interior portions for accommodating a plurality of different size diameters of the bar stock and an opening extending through to the plurality of step-down interior portions;
• d. an actuating assembly including a slidable piston, a rod connected to the piston and means for biasing the rod, the actuating assembly disposed within said inner tubular member for longitudinal movement therein, where the rod is aligned with said opening of said bar carrier and said biasing mean biasing the rod from engaging with said bar stock before said bar carrier reaches a front end of said inner tubular member;
• and
• e. means for supplying fluid under pressure within said inner tubular member and thereby cause said piston and said rod to advance longitudinally within said inner tubular member which in turn pushes said bar carrier, which in turn pushes the bar stock to a processing machine for processing, where said rod can further enter into said opening of said bar carrier to engage the one end of the bar stock to further advance the bar stock to the processing machine so that no material of the bar stock is left within said inner tubular member;
• f. whereby said bar feeding apparatus prevents vibrations and noise from generating when said bar feeding apparatus is in operation.