Blood-profusing apparatus

Claim 2

Apparatus for holding a fluid-filled bag and dispensing said fluid therefrom comprising: a frame having a first wall and a second wall; a plate inside said frame in operative relation with said first wall and movable away from and toward said first wall; means normally holding said plate in contact with said first wall; said means including spring means and a portion engaging said second wall and manipulatable in a first mode of operation to apply a retracting force to said plate to draw it away from said first wall to a retracted position and to provide a space between said plate and said first wall into which a fluidfilled bag may be inserted; and said portion in said first mode of operation bearing against said second wall and thereby being able to hold said plate in its retracted position, said portion of said means also being manipulatable in a second mode of operation to remove it from contact with said second wall, thereby releasing said plate from its retracted position and permitting it, with the aid of said spring means, to move toward said first wall and at the same time to apply pressure to said bag to dispense fluid therefrom.

Claim 3

The apparatus defined in claim 1 and including heating means secured to said frame for heating a blood bag carried thereby.

Claim 4

The apparatus defined in claim 1 and including heating means secured to said first wall for heating a blood bag carried in said frame.

Claim 5

Fluid-dispensing apparatus comprising: an open chamber having a plurality of walls including a front wall and a rear wall; a movable plate inside said chamber in operative relation with said front wall and adapted to be moved away from said front wall to provide a space in which a fluid-filled bag can be inserted; spring means positioned between said movable plate and said rear wall inside said chamber; a shaft secured to said movable plate and extending vertically therefrom through an aperture in said rear wall, said shaft having a free and outside said chamber; an operating handle threadedly coupled to said free end of said shaft outside said chamber and bearing against the outside surface of said rear wall; said handle being rotatable in one direction while bearing against said rear wall to move said movable plate away from said front wall and to hold said plate away from said front wall at any desired spacing from said front wall; said spring means being compressed by movement of said movable plate away from said front wall; and said operating handle being rotatable in a direction opposite to said one direction so that it can move along said shaft away from said rear wall whereby its holding action on said shaft is released and the compressed spring means can apply driving pressure to said movable plate and can move said movable plate back toward said front wall whereby said movable plate can apply pressure to said bag and can force said fluid therefrom.

Claim 6

Fluid-dispensing apparatus comprising: an open chamber having a plurality of walls including a front wall and a rear wall; a movable plate inside said chamber in operative relation with said front wall and adapted to be moved away from said front wall to provide a space in which a fluid-filled bag can be inserted; spring means positioned between said movable plate and said rear wall inside said chamber; a shaft secured to said movable plate and extending vertically therefrom through an aperture in said rear wall, said shaft having a free and outside said chamber; an operating handle threadedly coupled to said free end of said shaft outside said chamber and bearing against the outside surface of said rear wall; said handle being rotatable in one direction while bearing against said rear wall to move said movable plate away from said front wall and to hold said plate away from said front wall at any desired spacing from said front wall; said spring means being compressed by movement of said movable plate away from said front wall; and said operating handle being rotatable in a direction opposite to said one direction so that it can move along said shaft away from said rear wall whereby its holding action on said shaft is released and the compressed spring means can apply driving pressure to said movable plate and can move said movable plate back toward said front wall whereby said movable plate can apply pressure to said bag and can force said fluid therefrom.

Claim 7

The apparatus defined in claim 4 wherein said plate is about the same size and shape as said wall portion.

Claim 8

The apparatus defined in claim 4 wherein said shaft is threaded and said spring means comprises a cylindrical spring which is threaded on said shaft between said plate and said rear wall.

Claim 9

The apparatus defined in claim 4 wherein said shaft is threaded and said spring means comprises a cylindrical spring which is threaded on said shaft between said plate and said rear wall, the diameter of said spring being such that the spring exerts its force over a relatively large portion of the surface of said plate.

Claim 10

Fluid-dispensing apparatus comprising: an open chamber having a plurality of walls including a front wall and a rear wall; a movable plate inside said chamber in operative relation with said front wall and adapted to be moved away from said front wall to provide a space in which a fluid-filled bag can be inserted; a generally cylindrical spring positioned between said movable plate and said rear wall inside said chamber; a threaded shaft secured to said movable plate and extending vertically therefrom through said cylindrical spring and through an aperture in said rear wall, said shaft having a free End outside said chamber; an operating handle threadedly coupled to said free end of said threaded shaft outside said chamber and bearing against the outside surface of said rear wall; said handle being rotatable in one direction, while bearing against said rear wall, to move said movable plate away from said front wall and to hold said plate away from said front wall at any desired spacing from said front wall; said spring being compressed by movement of said movable plate away from said front wall; and said operating handle being removable from said threaded shaft by threading in a direction opposite to said one direction and away from said rear wall whereby the compressed spring can apply driving pressure to said movable plate and can move said movable plate back toward said front wall whereby said movable plate can apply pressure to said bag and can force said fluid therefrom.

Claim 11

Fluid-dispensing apparatus comprising: an open chamber having a plurality of walls including a front wall and a rear wall; a movable plate inside said chamber in operative relation with said front wall and adapted to be moved away from said front wall to provide a space in which a fluid-filled bag can be inserted; a generally cylindrical spring positioned between said movable plate and said rear wall inside said chamber; a threaded shaft secured to said movable plate and extending vertically therefrom through said cylindrical spring and through an aperture in said rear wall, said shaft having a free End outside said chamber; an operating handle threadedly coupled to said free end of said threaded shaft outside said chamber and bearing against the outside surface of said rear wall; said handle being rotatable in one direction, while bearing against said rear wall, to move said movable plate away from said front wall and to hold said plate away from said front wall at any desired spacing from said front wall; said spring being compressed by movement of said movable plate away from said front wall; and said operating handle being removable from said threaded shaft by threading in a direction opposite to said one direction and away from said rear wall whereby the compressed spring can apply driving pressure to said movable plate and can move said movable plate back toward said front wall whereby said movable plate can apply pressure to said bag and can force said fluid therefrom.

Claim 12

The apparatus defined in claim 8 wherein said handle includes a hub in which the free end of said shaft lies outside said chamber; said free end of said shaft including a first threaded portion and a second smaller-diameter, unthreaded portion; and said hub including a threaded portion at its end which is adapted to engage said first threaded portion of said shaft, said hub being rotatable to move it from said first threaded portion to said second portion whereby said handle and said shaft are disconnected from each other.