Easily detachable ultrasonic clamping device

An ultrasonic surgical instrument comprising:

• an end effector including blade and clamp means for the engagement of tissues located therebetween;
• an elongated shaft element having said end effector arranged at a first end thereof;
• an elongated tubular member extending about said elongated shaft element in coaxial relationship, said clamp means being movable relative to said blade and said tubular member, said elongated tubular member having a first end in operative engagement with said end effector;
• a handle portion for receiving second opposite ends of respectively said elongated shaft element and said elongated tubular member, said handle portion including finger-actuatable scissors-like thumb and finger ring structure for imparting axial displacement between said elongated shaft element and said elongated tubular member, said tubular member biasing said clamp means so as to cause said blade and clamp means to selective open and close relative to each other.