GB2301419A - Drive mechanism - Google Patents
Drive mechanismInfo
- Publication number
- GB2301419A GB2301419A GB9620182A GB9620182A GB2301419A GB 2301419 A GB2301419 A GB 2301419A GB 9620182 A GB9620182 A GB 9620182A GB 9620182 A GB9620182 A GB 9620182A GB 2301419 A GB2301419 A GB 2301419A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead screw
- engaging
- engaging element
- traveller
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2025—Screw mechanisms with means to disengage the nut or screw from their counterpart; Means for connecting screw and nut for stopping reciprocating movement
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/1458—Means for capture of the plunger flange
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Anesthesiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A lead screw drive comprises a lead screw (10) which is rotated by a motor. A traveller (40) is clamped at one end to a rod (14) parallel to the lead screw, the rod in turn engaging the plunger of a medical syringe. The other end of the traveller (40) has a U-shaped engaging element (42) with the two parallel arms (44, 46) thereof having grooves on their inner surfaces for engaging with the lead screw thread. The grooves also extend upwardly and downwardly of the region of engagement with the lead screw thread and radial movement of the engaging element (42) therefore moves the region of contact with the lead screw without causing disengagement. The device is particularly suitable for use with a medical syringe pump, to prevent inadvertent disengagement of the engaging element from the lead screw.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9502877.5A GB9502877D0 (en) | 1995-02-03 | 1995-02-03 | Drive mechanism |
PCT/GB1996/000228 WO1996023535A1 (en) | 1995-02-03 | 1996-02-02 | Drive mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9620182D0 GB9620182D0 (en) | 1996-11-13 |
GB2301419A true GB2301419A (en) | 1996-12-04 |
Family
ID=10769582
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9502877.5A Pending GB9502877D0 (en) | 1995-02-03 | 1995-02-03 | Drive mechanism |
GB9620182A Withdrawn GB2301419A (en) | 1995-02-03 | 1996-02-02 | Drive mechanism |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9502877.5A Pending GB9502877D0 (en) | 1995-02-03 | 1995-02-03 | Drive mechanism |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0754066A1 (en) |
GB (2) | GB9502877D0 (en) |
WO (1) | WO1996023535A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978261A (en) * | 1989-12-08 | 1990-12-18 | Wright Iii Charles O | Quill stop |
EP0445499A1 (en) * | 1990-01-08 | 1991-09-11 | Ivac Corporation | Screw drive engagement/disengagement and decoupling mechanism |
GB2247665A (en) * | 1990-09-06 | 1992-03-11 | Carl Morris | Jacking device |
EP0514816A1 (en) * | 1991-05-23 | 1992-11-25 | Ivac Corporation | Dynamic lead screw engagement and indicator |
-
1995
- 1995-02-03 GB GBGB9502877.5A patent/GB9502877D0/en active Pending
-
1996
- 1996-02-02 GB GB9620182A patent/GB2301419A/en not_active Withdrawn
- 1996-02-02 WO PCT/GB1996/000228 patent/WO1996023535A1/en not_active Application Discontinuation
- 1996-02-02 EP EP96901445A patent/EP0754066A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978261A (en) * | 1989-12-08 | 1990-12-18 | Wright Iii Charles O | Quill stop |
EP0445499A1 (en) * | 1990-01-08 | 1991-09-11 | Ivac Corporation | Screw drive engagement/disengagement and decoupling mechanism |
GB2247665A (en) * | 1990-09-06 | 1992-03-11 | Carl Morris | Jacking device |
EP0514816A1 (en) * | 1991-05-23 | 1992-11-25 | Ivac Corporation | Dynamic lead screw engagement and indicator |
Also Published As
Publication number | Publication date |
---|---|
GB9620182D0 (en) | 1996-11-13 |
EP0754066A1 (en) | 1997-01-22 |
WO1996023535A1 (en) | 1996-08-08 |
GB9502877D0 (en) | 1995-04-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |