Presses – Reciprocating press construction – Fluid pressure actuation
Patent
1996-09-16
1998-09-01
Gerrity, Stephen F.
Presses
Reciprocating press construction
Fluid pressure actuation
7245303, 100285, B30B 108
Patent
active
057995737
ABSTRACT:
A single-cylinder hydraulic press has a ram member spaced apart from a lower head die, and a work area being defined therebetween. The cylinder and the piston rod enable reciprocating movement of the ram member relative to the lower head die. A linkage mechanism enables cooperative engagement between the piston rod and the ram member. The linkage mechanism provides rolling contact with the ram member along four distinct linear locations. The linkage mechanism includes four pivot brackets, enabling pivotal rotation of the bell cranks relative thereto, and two lever pins retaining the bell cranks with the piston rod. Sandwiched between the bell cranks are two cam followers, which are driven upwardly and downwardly by the piston rod, the bell cranks each including a pair of rollers which engage with the ram member and provide "four point" contact therewith.
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Gerrity Stephen F.
Tishken Products, Inc.
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