Locking device for aspirator, syringe or like instrument
First Claim
1. An aspirator assembly, comprising:
- a) an elongated hollow barrel having a first open end, a second open end with a lock adapted to have an auxiliary device attached and secured thereto, an interior and an interior surface;
b) a plunger being reciprocally movable within said barrel along a length thereof;
c) said plunger including an elongated stem having an outer end and an inner end, a grip attached to said stem at said outer end, and a plunger head attached to said stem at said inner end, said plunger head being disposed inside said barrel and being slidably disposed in sealing engagement with said interior surface of said barrel;
d) locking means selectively positionable into and out of a locked position and formed in part on both said barrel and said stem and adapted for removably locking said plunger head in a plurality of spaced apart locations within and along the length of said barrel;
e) means for selectively disengaging said locking means and for allowing free reciprocating movement between said plunger and said barrel; and
f) said stem being formed with a thread and said plunger head being threadingly attached to said thread for finely adjusting a position of the plunger head relative to said barrel.
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0 Petitions
Accused Products
Abstract
An aspirator assembly enabled to remove fluids from a patient comprises an elongated hollow interior barrel, a plunger reciprocally movable within the barrel along the length thereof and extending outwardly from a rear end of the barrel. The plunger includes an elongated stem having a grip at an outer end thereof and a plunger head secured to an inner end of the stem. The plunger head is slidably engagable with an interior surface of the barrel. The improvement is found in a locking device which is selectively positionable into and out of a locked position. The locking device is formed in part on both the barrel and the stem and is adapted for removably locking the plunger head in a plurality of spaced apart locations within and along the length of the barrel. Additionally, the stem may be rotated so as to disengage the locking device and provide an aspirator with unobstructed reciprocation. Furthermore, a threaded stem connects the plunger head to the main plunger stem, so as to allow accurate adjustment of the aspirator volume by turning the handle. A flow control valve is provided at the second end of the barrel which allows selective closing of the end.
119 Citations
23 Claims
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1. An aspirator assembly, comprising:
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a) an elongated hollow barrel having a first open end, a second open end with a lock adapted to have an auxiliary device attached and secured thereto, an interior and an interior surface; b) a plunger being reciprocally movable within said barrel along a length thereof; c) said plunger including an elongated stem having an outer end and an inner end, a grip attached to said stem at said outer end, and a plunger head attached to said stem at said inner end, said plunger head being disposed inside said barrel and being slidably disposed in sealing engagement with said interior surface of said barrel; d) locking means selectively positionable into and out of a locked position and formed in part on both said barrel and said stem and adapted for removably locking said plunger head in a plurality of spaced apart locations within and along the length of said barrel; e) means for selectively disengaging said locking means and for allowing free reciprocating movement between said plunger and said barrel; and f) said stem being formed with a thread and said plunger head being threadingly attached to said thread for finely adjusting a position of the plunger head relative to said barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. In an aspirator assembly of the type having an elongated hollow barrel with a first open end and a second open end adapted to be attached at an auxiliary device;
- a plunger received in the hollow barrel through the first open end and being reciprocatingly movable within the barrel;
the plunger including an elongated stem and a plunger head attached to the stem and being slidably disposed in sealing engagement with an interior surface of the barrel, wherein the improvement comprises;locking means for selectively locking said elongated stem and said plunger head in any one of a plurality of spaced-apart positions along a length of said barrel, and disengaging means for disengaging said locking means and for allowing free reciprocating movement of the plunger with the barrel; and adjusting means for finely adjusting a position of said plunger head relative to said barrel. - View Dependent Claims (19, 20, 21, 22, 23)
- a plunger received in the hollow barrel through the first open end and being reciprocatingly movable within the barrel;
Specification