US4807344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical sampling needle removal and disposal device
Assignee: Individual
•
Filing: 1987-10-13
•
Granted: 1989-02-28
•
Expires: 2007-10-13
Abstract
Abstract A device for removing and disposing of blood sampling needles with a minumum of manipulation and without manual contact with any contaminated part. An electrical motor operates a cog wheel to unscrew the needle from the vacuum container sleeve to drop into a closed disposal receptacle. The motor is initiated by depression of a starting switch by the sleeve. The cog wheel is recessed for unimpeded insertion of the needle and sleeve for needle removal. A cycle control circuit assures that the wheel stops in the proper position with the recess adjacent the needle insertion site.
Inventors
- 👤 Lance P. Kelson
- 👤 Ross J. Kelson
- 👤 Allan F. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:46
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M2005/3208; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53687
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
122 words
A device for safely removing a medical cannula from a body fluid sampling assembly said cannula being mounted within an externally threaded hub, an external sleeve, and an internally threaded boss carried by the sleeve and engaging the threads of the hub, said removal device comprising: a base plate having an upper side and a lower side; an electrical motor mounted on the base plate and having a rotating output shaft; a wheel mounted to be rotated by the shaft; hub engaging means on at least a portion of the periphery of the wheel; and means positioning the sleeve for engagement of the hub by the periphery of the wheel, so that the hub is rotated to be unthreaded from the assembly.
Claim 2
Independent Claim
122 words
A device for safely removing a medical cannula from a body fluid sampling assembly said cannula being mounted within an externally threaded hub, an external sleeve, and an internally threaded boss carried by the sleeve and engaging the threads of the hub, said removal device comprising: a base plate having an upper side and a lower side; an electrical motor mounted on the base plate and having a rotating output shaft; a wheel mounted to be rotated by the shaft; hub engaging means on at least a portion of the periphery of the wheel; and means positioning the sleeve for engagement of the hub by the periphery of the wheel, so that the hub is rotated to be unthreaded from the assembly.
Claim 3
Dependent Claim
41 words
The device of claim 1, further comprising: a normally open initiation switch controlling the operation of the motor, and positioned to be closed by contact with the sampling assembly when it is placed into the device for removal of the cannula.
Claim 4
Dependent Claim
30 words
The device of claim 2, wherein: the device is configured so that the cannula and hub fall below the base plate when the hub is unthreaded from the sampling assembly.
Claim 5
Dependent Claim
20 words
The device of claim 3, further comprising: means securing the device to the mouth of a used cannula disposal receptacle.
Claim 6
Dependent Claim
58 words
The device of claim 2, wherein: the periphery of the wheel has at least one recess providing clearance for unimpeded placement of the sampling assembly into the device for removal of the cannula; and the device further includes indexing control means causing the wheel to stop rotating after each use with said recess in position for such placement.
Claim 7
Dependent Claim
53 words
The device of claim 5, wherein the indexing control means comprises: a normally closed cycle control switch connected in parallel with the initiation switch; and a cam closing the cycle control switch at a rotated position of the wheel in which the recess is in position for the next use of the device.
Claim 8
Dependent Claim
15 words
The device of claim 6, wherein: the motor is a direct current stepper type motor.
Claim 9
Dependent Claim
52 words
The device of claim 7, further comprising: a control unit for passing current to the motor in response to an electrical command signal; and an electrical circuit for generation of time spaced electrical command signals to the control unit, said signal generating circuit being controlled by the initiation and cycle control switches.
Claim 10
Dependent Claim
14 words
The device of claim 8, further comprising: a source of direct current electrical power.
Claim 11
Dependent Claim
18 words
The device of claim 9, wherein: the direct current power source is at least one direct current battery.
Claim 12
Dependent Claim
29 words
The device of claim 10, wherein: the device is configured so that the cannula and hub fall below the base plate when the hub is unthreaded from the sleeve.
Claim 13
Dependent Claim
20 words
The device of claim 11, further comprising: means securing the device to the mouth of a used cannula disposal receptacle.
Claim 14
Dependent Claim
35 words
The device of claim 8, wherein: the direct current battery, the signal generating circuit, the initiation and cycle control switches, the motor control unit, and the sleeve positioning means are carried by the base plate.
Claim 15
Dependent Claim
16 words
The device of claim 10, further comprising: an alternating current powered direct current battery recharging circuit.
Claim 16
Dependent Claim
16 words
The device of claim 13, further comprising: an alternating current powered direct current battery recharging circuit.
Claim 17
Dependent Claim
15 words
The device of claim 15, wherein: the recharging circuit is mounted upon the base plate.
Claim 18
Dependent Claim
19 words
The device of claim 9, wherein: the direct current power source is an alternating current transformer and rectifier circuit.
Claim 19
Dependent Claim
36 words
The device of claim 17, wherein: the transformer and rectifier circuit, the signal generating circuit, the initiation and cycle control switches, the motor control unit, and the sleeve positioning means are carried by the base plate.
Claim 20
Dependent Claim
18 words
The device of claim 5, wherein: the wheel is secured directly to the output shaft of the motor.
Claim 21
Dependent Claim
18 words
The device of claim 6, wherein: the wheel is secured directly to the output shaft of the motor.
Claim 22
Dependent Claim
18 words
The device of claim 8, wherein: the wheel is secured directly to the output shaft of the motor.
Claim 23
Dependent Claim
13 words
The device of claim 21, wherein: the cam is located upon the wheel.
Claim 24
Dependent Claim
28 words
The device of claim 5, further comprising: a wheel axle mounted upon the base plate; and a gear train mounted to act between the shaft and the wheel.
Claim 25
Dependent Claim
28 words
The device of claim 6, further comprising: a wheel axle mounted upon the base plate; and a gear train mounted to act between the shaft and the wheel.
Claim 26
Dependent Claim
28 words
The device of claim 8, further comprising: a wheel axle mounted upon the base plate; and a gear train mounted to act between the shaft and the wheel.
References Cited (Backward Citations)
US3469750A
Cited
US3851555A
Cited
US4569258A
Cited
US4275628A
Cited
US4255996A
Cited
US4375849A
Cited
US4667821A
Cited
US4738362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |