Mechanism for screw drive and syringe plunger engagement/disenga

Details Mechanism for screw drive and syringe plunger engagement/disenga Mechanism for screw drive and syringe plunger engagement/disenga

1980-12-15

1984-01-10

Staab, Lawrence J.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

74 97, 744248A, 128DIG1, 222390, 604155, F16H 2520, A61M 500

Patent

active

044247206

ABSTRACT:
A mechanism for screw drive and syringe plunger engagement and disengagement for a syringe infusion pump, wherein a split-nut pair are moveable into and out of engagement with a lead screw by means of rotary cam control, the rotary cam being keyed with a crank disk that is coupled to a crank arm, which operates as the syringe plunger mover. The crank arm is rotatable into and out of engagement with the syringe plunger, such rotation also causing the split-nut pair to move into and out of engagement with the lead screw. Index and cam means are carried by the crank arm to aid in proper alignment with the syringe plunger, and a sensor is provided for monitoring proper engagement of the crank arm with the plunger.

REFERENCES:
patent: 1231625 (1917-07-01), Lee
patent: 1255786 (1918-02-01), Phillips
patent: 1393111 (1921-10-01), Getchell
patent: 1905569 (1933-04-01), Rapellin
patent: 2345148 (1944-03-01), Protor
patent: 2498672 (1950-02-01), Glass
patent: 2612057 (1952-09-01), Gray et al.
patent: 2627270 (1953-02-01), Glass
patent: 2702547 (1955-02-01), Glass
patent: 2779366 (1957-01-01), McKenzie
patent: 3701350 (1972-10-01), Guenther
patent: 3858581 (1975-01-01), Kamen
patent: 4189950 (1980-02-01), Killian
patent: 4191187 (1980-03-01), Wright

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