Patent ID: 6234972
Filing Date: 2001-05-22
Classification: G01L

Abstract:
An axial gearless movement mechanism for a blood pressure gage, said gage including a bellows assembly disposed on one side of a housing interior, and a dial indicator face disposed on an opposite side of said housing interior, said mechanism comprising:a shaft member having a first end in contact with said bellows assembly and an opposite second end having a pointer attached thereto adjacent to indicia on said dial indicator face, said first and second ends defining a shaft axis; anda spring member coaxially positioned along the shaft axis and helically wound about said shaft member, said spring member having a first end attached to an intermediate portion of said shaft member and a second end attached to a fixed support, wherein movement of said bellows assembly along the shaft axis directly engages the first end of said shaft member, causing said shaft member to translate in an axial direction, and said spring member to flex against the fixed support, the flexion of said spring member causing said shaft member to rotate to allow said pointer to move circumferentially relative to said dial face, and in which said spring member acts to bias said axial movement mechanism.