Automatic injector for hypodermic syringes or the like and lancet holder for use in conjunction with an automatic injector
First Claim
1. An apparatus for propelling a needle bearing device into biological tissue comprising:
- an inner sleeve forming an open-ended longitudinal chamber therein for removably receiving said needle bearing device, said inner sleeve having first and second spaced apart recesses disposed in the outer surface thereof, said first recess being of a greater depth than said second recess;
an outer sleeve forming an open-ended longitudinal chamber therein for receiving and for permitting the movement therein of said inner sleeve between first and second positions, said outer sleeve having at least one aperture disposed therethrough;
biasing means for biasing said inner sleeve into said first position relative to said outer sleeve;
ball bearing means dimensioned to reside within said at least one aperture and to selectively reside within said second recess when aligned with said aperture when said inner sleeve is in said second position relative to said outer sleeve; and
locking sleeve means forming an open-ended longitudinal chamber therein for receiving and for permitting the movement therein between first and second positions of a portion of said outer sleeve adjacent to said at least one aperture disposed therein, said locking sleeve including an inner wall surface for forcing said ball bearing means into said second recess, when said outer sleeve is in said second position relative to said locking sleeve means, so as to lock the position of said inner sleeve relative to said outer sleeve, when said inner sleeve is in said second position thereof relative to said outer sleeve, longitudinal force on said locking sleeve means in a direction urging the same from said second position relative to said outer sleeve causing said ball bearing means to disengage said raised surface and said inner sleeve to shift position from said second position to said first position relative to said outer sleeve as a result of the action of said biasing means thereon, said first recess being provided to accept said ball bearing means during assembly of said apparatus, said first recess being of sufficient depth to permit the passage of said locking sleeve means over said ball bearing means during said assembly.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for propelling an elongated device including a sharp object such as a hypodermic syringe and needle or the like into biological tissue, the apparatus including an inner sleeve for carrying the hypodermic syringe or the like and an outer sleeve in which the inner sleeve reciprocates, biasing means being provided for biasing the inner sleeve relative to the outer sleeve. The locking sleeve receives therein the outer sleeve and through at least one recess and ball bearing arrangement, the inner sleeve can be locked relative to the outer sleeve. When the locking sleeve is forced against biological tissue, the ball bearing or bearings release the locked relationship between the inner and outer sleeves and propel the needle of the hypodermic syringe or the like into the biological tissue. An improvement in assembly is provided by the present invention such that the ball bearings can be placed in position without the boring of a ball bearing loading aperture in the locking sleeve. Additionally, a lancet holder is provided which simulates the shape of a syringe. The lancet holder carries a lancet for insertion into the aforedescribed apparatus for utilization in taking of blood samples or the like.
38 Citations
14 Claims
-
1. An apparatus for propelling a needle bearing device into biological tissue comprising:
-
an inner sleeve forming an open-ended longitudinal chamber therein for removably receiving said needle bearing device, said inner sleeve having first and second spaced apart recesses disposed in the outer surface thereof, said first recess being of a greater depth than said second recess; an outer sleeve forming an open-ended longitudinal chamber therein for receiving and for permitting the movement therein of said inner sleeve between first and second positions, said outer sleeve having at least one aperture disposed therethrough; biasing means for biasing said inner sleeve into said first position relative to said outer sleeve; ball bearing means dimensioned to reside within said at least one aperture and to selectively reside within said second recess when aligned with said aperture when said inner sleeve is in said second position relative to said outer sleeve; and locking sleeve means forming an open-ended longitudinal chamber therein for receiving and for permitting the movement therein between first and second positions of a portion of said outer sleeve adjacent to said at least one aperture disposed therein, said locking sleeve including an inner wall surface for forcing said ball bearing means into said second recess, when said outer sleeve is in said second position relative to said locking sleeve means, so as to lock the position of said inner sleeve relative to said outer sleeve, when said inner sleeve is in said second position thereof relative to said outer sleeve, longitudinal force on said locking sleeve means in a direction urging the same from said second position relative to said outer sleeve causing said ball bearing means to disengage said raised surface and said inner sleeve to shift position from said second position to said first position relative to said outer sleeve as a result of the action of said biasing means thereon, said first recess being provided to accept said ball bearing means during assembly of said apparatus, said first recess being of sufficient depth to permit the passage of said locking sleeve means over said ball bearing means during said assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A lancet holder for use in conjunction with an apparatus for propelling the needle of a hypodermic syringe into biological tissue comprising:
-
an elongated body portion having first and second ends; a head portion disposed at said first end of said elongated body portion, said head portion and said body portion substantially simulating the shape of a hypodermic syringe; and retaining means for retaining a portion of a lancet disposed adjacent to said second end of said elongated body portion. - View Dependent Claims (12, 13, 14)
-
Specification