Patent ID: 8308689
Filing Date: 2012-11-13
Classification: A61M

Abstract:
1. A drive ram for a medical fluid injector, the drive ram comprising: a first gripper member pivotally interconnected with a plunger engaging end of the drive ram, wherein the first gripper member comprises a first end, a second end, and a main body portion between the first and second ends of the first gripper member, wherein the first end of the first gripper member is engageable with a syringe plunger, and wherein the second end of the first gripper member comprises a first aperture and a first raised contact portion; a second gripper member pivotally interconnected with the plunger engaging end of the drive ram, wherein the second gripper member comprises a first end, a second end, and a main body portion between the first and second ends of the second gripper member, wherein the first end of the second gripper member is engageable with a syringe plunger, and wherein the second end of the second gripper member comprises a second aperture and a second raised contact portion; and a pivot pin within the first aperture of the first gripper member and the second aperture of the second gripper member; wherein contact between the first and second gripper members is limited to the respective first and second raised contact portions; wherein each of the first and second gripper members is pivotable about a common pivot axis that coincides with the pivot pin; and wherein the first and second gripper members are pivotable between a first position and a second position, the first ends of the first and second gripper members being spaced apart by a first distance when the first and second gripper members are in the first position, and the first ends being spaced apart by a second distance greater than the first distance when the first and second gripper members are in the second position.