Syringe pump and related method

US11615886B2 · kind B2 · utility

Assignee

• DEKA Products Limited Parternship · US

Inventors

• Dean Kamen · Bedford, US
• Larry B. Gray · Merrimack, US
• Jesse T. Bodwell · Manchester, US
• John M. Kerwin · Manchester, US
• Dirk A. van der Merwe · Canterbury, US
• Stephen L. Fichera · Salem, US
• Jonathan R. Thurber · Deerfield, US
• Martin D. Desch · Newburyport, US

Key dates

• Filing date: Feb 12, 2020
• Grant date: Mar 28, 2023
• Expiry date: May 9, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/8206
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A syringe pump includes a lead screw, a motor, and a sliding block assembly. The lead screw has threads and the motor is coupled to the lead screw to rotate it. The half-nut housing has a half nut and a barrel cam. The half nut is disposed within the half-nut housing. The half nut has half-nut threads at an end adjacent to the lead screw void. The half nut engages or disengages with the threads of the lead screw. The half nut includes a half-nut cam-follower surface and a half nut slot. The barrel cam is disposed within the half-nut housing and engages with the half-nut cam-follower surface. The barrel cam includes a pin to fit within the half nut slot such that the barrel cam rotates between a first position and a second position to actuate the half nut between the engagement position and the disengagement position, respectively.