Patent · US Expired

Solenoid drive apparatus for an external infusion pump

US4678408A · kind A · utility

755Cited by

7References

11Claims

0Family size

Assignee

Pacesetter Infusion, Ltd. · US

Inventors

Clyde K. Nason · Valencia, US
Gordon W. Culp · San Fernando, US

Key dates

Filing date	Sep 24, 1985
Grant date	Jul 7, 1987
Priority date	—
Expiry date	Sep 24, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2136
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A solenoid drive apparatus for driving a lead screw of an External Infusion Pump (1) having a housing (302), solenoid winding (356) within the housing (302), a solenoid armature (358) which is driven by the field of the solenoid winding (356), push rod (362) which is driven by the armature (358), pawn (314) which is driven by push rod (362), a first pawl (320) which is driven by pawn (314) and a second pawl (326) which is an antibacklash device, a ratchet wheel (318) having teeth (319) around its periphery and engaged by the first pawl (320) and the second pawl (326) and the drive shaft (316) which is drawn by the ratchet of the ratchet wheel (318).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.