EP0354852A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Syringe pump apparatus
Assignee: Terumo Corp
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Filing: 1989-08-10
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Granted: —
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Expires: 2009-08-10
Abstract
Abstract Disclosed is a syringe pump apparatus adapted to have a syringe (3) mounted thereon so as to supply in a specified amount per specified unit of time an aqueous solution such as medication within the syringe. A first shaft (26) is fixed to a slider (7) for causing a piston portion (3b) of the syringe to operate. Between this slider and a drive motor (20) there are provided a block (24) and a second shaft (29), the block being provided with an overload detecting mechanism (51). When the movement of the slider is forcedly stopped during a time period in which the slider is being moved through driving of the drive motor, the resulting load is transmitted to the first shaft in response to the forced stoppage of the slider. In accordance with this load, the overload detecting mechanism detects the state of overload of the slider. Then, when the value detected has exceeded a specified value, the drive motor is stopped by a drive halting mechanism.
Inventors
- 👤 Yoshio Ito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/1452; A61M5/1456; A61M5/168; A61M5/16831; A61M5/16854; Y; Y10; Y10S; Y10S128/00; Y10S128/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
274 words
A syringe pump apparatus adapted to suppply a specified amount of aqueous solution per unit of time from a syringe within which the aqueous solution is accommodated, characterized by comprising: a main body (1) of the syringe pump apparatus; syringe holding means (4,5,9) provided on said main body for having said syringe placed thereon; a slider (7) for engaging a piston portion of said syringe when said syringe is placed on said main body of the pump apparatus, the slider being slidably mounted on said main body so as to move said piston portion; first shaft means (26); fixing means (38) for fixing said first shaft means so as to enable the same to move in one with said slider; a drive source (20) for supplying a drive force for sliding movement of said slider; connecting means for disconnectably connecting said drive source and said slider, the connecting means including second shaft means (29) connected to said slider and a block (24) connected to said second shaft means; overload detecting means (51) provided on said block, the overload detecting means being adapted to detect a state of overload of said slider in accordance with the load produced in said first shaft means due to a forced stop of said slider, said load being produced when the sliding movement of said slider is forcedly stopped during a time period in which said slider is being driven by said drive source; and drive halting means (50) capable of operating so as to caouse the driving of said drive source to be halted in accordance with a result of the detection made by said overload detecting means.
Claim 2
Dependent Claim
274 words
A syringe pump apparatus adapted to suppply a specified amount of aqueous solution per unit of time from a syringe within which the aqueous solution is accommodated, characterized by comprising: a main body (1) of the syringe pump apparatus; syringe holding means (4,5,9) provided on said main body for having said syringe placed thereon; a slider (7) for engaging a piston portion of said syringe when said syringe is placed on said main body of the pump apparatus, the slider being slidably mounted on said main body so as to move said piston portion; first shaft means (26); fixing means (38) for fixing said first shaft means so as to enable the same to move in one with said slider; a drive source (20) for supplying a drive force for sliding movement of said slider; connecting means for disconnectably connecting said drive source and said slider, the connecting means including second shaft means (29) connected to said slider and a block (24) connected to said second shaft means; overload detecting means (51) provided on said block, the overload detecting means being adapted to detect a state of overload of said slider in accordance with the load produced in said first shaft means due to a forced stop of said slider, said load being produced when the sliding movement of said slider is forcedly stopped during a time period in which said slider is being driven by said drive source; and drive halting means (50) capable of operating so as to caouse the driving of said drive source to be halted in accordance with a result of the detection made by said overload detecting means.
Claim 3
Dependent Claim
94 words
The syringe pump apparatus as set forth in claim 1, characterized in that said overload detecting means (51) includes an elastic member (30) capable of being deformed in accordance with the load produced in said first shaft means, a detecting plate (31) capable of being moved in accordance with the deformation of said elastic member, and sensor means (33) for causing said drive halting means to operate at the time when the amount of said detecting plate moved is detected and exceeded a specified value, whereby the driving of said drive source is halted.
Claim 4
Dependent Claim
22 words
The syringe pump apparatus as set forth in claim 2, characterized in that said sensor means is a reflective type photosensor (33).
Claim 5
Dependent Claim
45 words
The syringe pump apparatus as set forth in claim 1, characterized in that said first shaft means (26) is constituted by an elongate pipe shaft and said second shaft means (29) of said connecting means is constituted by a shaft passed through said pipe shaft.
Claim 6
Dependent Claim
91 words
The syringe pump apparatus as set forth in claim 4, characterized in that said pipe shaft (26) constituting said first shaft means has one end (26a) fixed to a frame (34) of said slider by said fixing means, said fixing means being constituted by a seal nut (38) screwed over said one end (26a) of said pipe shaft via a first seal member (39), said seal nut having a through hole (38a) permitting a shaft (29) of said second shaft means to be passed therethrough via a second seal member (40).
References Cited (Backward Citations)
No citation records indexed.
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