Applicators are described suitable for the application of liquid to patient's skin. An applicator pad (3) is supported on a support flange (23) of an applicator housing (2), which receives a liquid cartridge (5). To moderate the rush of liquid on to the back of the applicator pad a flow distributor
Applicators are described suitable for the application of liquid to patient's skin. An applicator pad (3) is supported on a support flange (23) of an applicator housing (2), which receives a liquid cartridge (5). To moderate the rush of liquid on to the back of the applicator pad a flow distributor plate (6) is positioned on the rear position of the pad (3), restricting flow onto the pad to an annular slit opening around the plate (6). The front surface of the plate (6), opposing the pad (3), may have one or more grooves so that liquid can flow from the edge towards the center. Also disclosed, as an alternative, is the use of a projecting cantilevered tongue structure to distribute liquid across the rear surface of the sponge pad. The pad may have a hooked lobe shape for a front end of the applicator pad.
대표청구항▼
1. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion with an outer peripheral edge and a front surface for contact with a patient's skin in use;
1. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion with an outer peripheral edge and a front surface for contact with a patient's skin in use; anda reservoir of surgical prep liquid being comprised or received in the applicator housing, wherein flow access to the rear surface of the pad is through a generally annular slit which is radially outward of said outer peripheral edge. 2. A surgical prep applicator according to claim 1 in which the applicator pad is substantially flat, and has a layer thickness less than the smallest length or width of its front surface. 3. A surgical prep applicator according to claim 1 in which the plan outline of the applicator pad has at least one angle subtending less than 90°. 4. A surgical prep applicator according to claim 1 in which the applicator housing defines an antechamber immediately above the pad support portion, and a flow entry construction upstream of this antechamber by means of which liquid enters the antechamber from said reservoir which is a discrete container of said surgical prep liquid having an openable front end wall. 5. A surgical prep applicator according to claim 1 in which the applicator housing includes an interior structure for opening a front end wall of a liquid container retaining said surgical prep liquid when the liquid container is advanced into engagement with said interior structure. 6. The surgical prep applicator of claim 1 wherein said applicator pad has an outer edge periphery which includes a narrow lobe portion and a concave portion which is adjacent said narrow lobe portion. 7. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion and a front surface for contact with a patient's skin in use; and a reservoir of surgical prep liquid being comprised or received in the applicator housing, wherein flow access to the rear surface of the pad is through a generally annular slit, wherein said generally annular slit is defined by an outer periphery of a flow distributor element, covering a central region of the pad rear surface, and a pad support component engaging around the pad rear surface at a spacing from the outer periphery of the flow distributor element. 8. A surgical prep applicator according to claim 7 in which the flow distributor element is fluid-impermeable over its area. 9. A surgical prep applicator according to claim 8 in which the front of the distributor element, opposed to the rear surface of the applicator pad, has one or more flow channels whereby liquid may flow from the outer periphery towards the center of the distributor element against the rear surface of the applicator pad. 10. A surgical prep applicator according to claim 9 in which the distributor element is a flat disc. 11. A surgical prep applicator according to claim 10 in which the applicator housing defines an antechamber immediately above the pad support portion, and a flow entry construction upstream of this antechamber by means of which liquid enters the antechamber from said reservoir which is a discrete container of said surgical prep liquid having an openable front end wall. 12. A surgical prep applicator according to claim 11 in which the applicator includes an interior structure or mechanism for opening the front end wall of a liquid container when the container is advanced into engagement. 13. A surgical prep applicator according to claim 7 in which said generally annular slit through which liquid flows to the rear of the pad is defined by rearward spacing between a periphery of a flow distributor element and a forwardly-directed shoulder of an applicator housing flange behind it. 14. A surgical prep applicator according to claim 7 in which the front of the distributor element, opposed to the rear surface of the applicator pad, has one or more flow channels whereby liquid may flow from the outer periphery towards the center of the distributor element against the rear surface of the applicator pad. 15. A surgical prep applicator according to claim 14 in which the distributor element is a flat disc. 16. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion and a front surface for contact with a patient's skin in use; a reservoir of surgical prep liquid being comprised or received in the applicator housing, wherein flow access to the rear surface of the pad is through a generally annular slit; and wherein an outer wall of an applicator flow conduit has an outwardly-extending flange formation constituting a support for the rear of the pad, a peripheral part of this flange formation being bonded to the rear of the pad to hold the pad in place, whereas inside the bonded part the front surface of the support flange contains a flow distributor plate in a recess corresponding substantially in size and shape to the distribution plate with a flow clearance around its periphery. 17. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion and a front surface for contact with a patient's skin in use; and a reservoir of surgical prep liquid being comprised or received in the applicator housing, wherein flow access to the rear surface of the pad is through a generally annular slit, wherein a slit clearance through which liquid flows to the rear surface of the pad is defined by radial clearance between a portion of the outer periphery of a distributor element and a portion of an inwardly-directed border of an opening of an applicator housing flange in which opening the distributor element sits for liquid flow over an edge portion of said outer periphery. 18. A surgical prep applicator comprising: an applicator housing including a flange which defines a recess;an applicator pad which is connected to said applicator housing;a flow distributor disc positioned between a portion of said applicator pad and a portion of said applicator housing and being received within said recess; andwherein said flow distributor disc includes an outer edge and wherein said flange and said flow distributor disc cooperate to define a flow path over said outer edge. 19. The surgical prep applicator of claim 18 wherein said flow distributor disc includes an applicator pad-facing surface which defines a flow channel which is open at said outer edge for creating an inward flow path. 20. The surgical prep applicator of claim 19 wherein said flow distributor disc is trapped between said flange and said applicator pad by the connection of said applicator pad to said applicator housing. 21. The surgical prep applicator of claim 18 wherein said recess is annular. 22. The surgical prep applicator of claim 18 wherein said applicator housing includes a flange with a shoulder and said recess is defined in part by a peripheral wall of said shoulder. 23. The surgical prep applicator of claim 18 wherein said applicator housing includes a flange with a shoulder wherein said shoulder is segmented by a lug which contacts said flow distributor disc. 24. The surgical prep applicator of claim 18 wherein said flow path encompasses a majority of said outer edge. 25. A surgical prep applicator comprising: an applicator housing including a flange which defines a valve seat;an applicator pad which is connected to said applicator housing; anda flow distributor disc initially positioned between a portion of said applicator pad and a portion of said applicator housing so as to place said flow distribution disc against a surface of said applicator pad, said flow distributor disc being movable into a sealing position against said valve seat in response to sufficient force on said applicator pad. 26. The surgical prep applicator of claim 25 wherein said flow distributor disc includes an outer edge and wherein said flange and said flow distributor disc cooperate to define a flow path over a portion of said outer edge. 27. The surgical prep applicator of claim 26 wherein said flow distributor disc includes an applicator pad-facing surface which defines a flow channel which is open at said outer edge for creating an inward flow path. 28. A surgical prep applicator comprising: an applicator housing;an applicator pad which is connected to said applicator housing; anda flow distributor disc having an outer peripheral edge and being positioned between a portion of said applicator pad and a portion of said applicator housing, said flow distributor disc further including an applicator pad-facing surface, said applicator pad-facing surface defining a flow channel which is open at a portion of said outer peripheral edge for creating an inward flow path. 29. The surgical prep applicator of claim 28 wherein said applicator housing includes a flange and said flange defines an annular recess wherein said flow distributor disc is received within said annular recess. 30. The surgical prep applicator of claim 28 wherein said applicator housing defines a valve seat and said flow distributor disc is movable into a sealing position against said valve seat in response to sufficient force on said applicator pad. 31. A surgical prep applicator comprising: an applicator housing with a head having a pad support portion;a deformable, liquid-permeable applicator pad with a rear surface connected to the pad support portion and a front surface for contact with a patient's skin in use;a reservoir of surgical prep liquid being comprised or received in the applicator housing, wherein flow access to the rear surface of the pad is through a generally annular slit; andwherein a front of a distributor element, opposed to the rear surface of the applicator pad, has one or more flow channels whereby liquid may flow from an outer periphery of said distributor element towards the center of the distributor element against the rear surface of the applicator pad. 32. A surgical prep applicator comprising: an applicator housing including a first portion of a valve;an applicator pad joined to said applicator housing; anda second portion of said valve positioned between a portion of said applicator pad and a portion of said applicator housing, said second portion including an outer peripheral edge which in cooperation with said first portion defines a flow path over said outer peripheral edge, said second portion being movable into sealing contact against said first portion, wherein said second portion includes an applicator pad-facing surface which defines a flow channel which is open at said outer edge for creating an inward flow path. 33. The surgical prep applicator of claim 32 wherein said first portion is a flange shoulder. 34. The surgical prep applicator of claim 33 wherein said second portion is a flow distributor disc. 35. The surgical prep applicator of claim 32 wherein said second portion is a flow distributor disc. 36. A surgical prep applicator comprising: an applicator housing including a flange shoulder;an applicator pad joined to said applicator housing; anda flow distributor disc positioned between a portion of said applicator pad and a portion of said applicator housing, said flow distributor disc being movable into sealing contact against said flange shoulder, wherein said flow distributor disc includes an outer peripheral edge which in cooperation with said flange shoulder defines a flow path over a portion of said outer peripheral edge, wherein said flow distributor disc includes an applicator pad-facing surface which defines a flow channel which is open at said outer edge for creating an inward flow path.
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