1. A seal assembly for providing a seal between a cylindrical member and a housing with the cylindrical member rotatable around a central axis and relative the housing, said seal assembly comprising:
a casing unit defined by a side wall and a flange extending radially from said side wall; and
a sleeve secured to said flange and presenting a first edge and a second edge with said first edge defining an inclined surface extending angularly relative to the central axis for providing a seal between the cylindrical member and the housing.
2. A seal assembly as set forth in claim 1, wherein said inclined surface extending angularly relative said second edge.
3. A seal assembly as set forth in claim 2, wherein said first edge further defines a flat segment extending in a parallel relationship with said second edge and an inclined segment sloping from said flat segment towards said second edge thereby continuously lubricating the cylindrical member as lubricant circulates about said flat segment and said inclined segment.
4. A seal assembly as set forth in claim 3, wherein said sleeve includes a wafer portion extending to an annular lip, said wafer portion presenting said first edge defining an upper diameter and said annular lip presenting said second edge defining a lower diameter.
5. A seal assembly as set forth in claim 4, wherein said sleeve is formed from at least one of the elastomeric materials, such as rubber, silicone, polyacrylic, fluoroelastomer, ethylene acrylic, silicone, polytetrafluoroethylene (PTFE).
6. A seal assembly as set forth in claim 5, wherein said inclined segment presents an angle of inclination in the range of 0 to 10 degrees relative to the central axis.
7. A seal assembly as set forth in claim 6, including a collar member connected to said sleeve to secure said sleeve to said flange.
8. A seal assembly as set forth in claim 7, wherein said collar member presents a neck portion and an inclined annular wall defining a seat to receive said annular lip.
9. A seal assembly as set forth in claim 8, wherein said neck portion homogeneously extends from said inclined annular wall to an upper lip and a lower lip defining a nest therebetween to sandwich said flange between said upper lip and said lower lip.
10. A seal assembly as set forth in claim 9, including a rib defined on said upper lip and extending around said upper lip for reinforcement and structural integrity of said collar member.
11. A seal assembly as set forth in claim 10, wherein said collar member is formed from flexible polymeric material.
12. A seal assembly as set forth in claim 11, wherein said sleeve presents frustoconical configuration.
13. A method of forming a seal for a seal assembly to seal space defined between a cylindrical member and a housing with the cylindrical member rotatable around an axis relative the housing, said method comprising the steps of:
forming a casing unit having a side wall and a flange extending radially from the side wall;
forming a sleeve having a first edge and a second edge; and
forming an inclined surface at the first edge extending angularly relative to the axis to form a seal between the cylindrical member and the housing.
14. A method as set forth in claim 13, including the step of forming a flat segment extending in a parallel relationship with the second edge and an inclined segment sloping from the flat segment towards the second edge to continuously lubricate the cylindrical member as lubricant circulates about the flat segment and the inclined segment.
15. A method as set forth in claim 13, wherein the step of forming the sleeve is further defined by forming a wafer portion of the sleeve extending to an annular lip.
16. A method as set forth in claim 13, including the step of forming the sleeve from at least one of the elastomeric materials, such as rubber, silicone, polyacrylic, fluoroelastomer, ethylene acrylic, silicone, polytetrafluoroethylene (PTFE).
17. A method as set forth in claim 13, including the step of forming the inclined segment at an angle of inclination in the range of 0 to 10 degrees relative to the axis.
18. A method as set forth in claim 13, including the step of forming a collar member to define an inclined annular wall.
19. A method as set forth in claim 13, including the step of forming a seat in the inclined annular wall to receive the annular lip.
20. A seal assembly for providing a seal between a cylindrical member and a housing with the cylindrical member rotatable around a central axis and relative the housing, said seal assembly comprising:
a sleeve secured to the housing and presenting a first edge and a second edge; and
an inclined surface of said first edge extending angularly relative to the central axis for providing a seal between the cylindrical member and the housing.
21. A seal assembly as set forth in claim 20, wherein said inclined surface extending angularly relative said second edge.
22. A seal assembly as set forth in claim 20, including a casing unit defined by a side wall and a flange extending radially from said side wall said sleeve connected to said flange.
23. A seal assembly as set forth in claim 20, wherein said first edge further defines a flat segment extending in a parallel relationship with said second edge and an inclined segment sloping from said flat segment towards said second edge.
24. A seal assembly as set forth in claim 20, wherein said sleeve includes a wafer portion extending to an annular lip, said wafer portion presenting said first edge defining an upper diameter and said annular lip presenting said second edge defining a lower diameter.
25. A seal assembly as set forth in claim 20, wherein said sleeve is formed from at least one of the elastomeric materials, such as rubber, silicone, polyacrylic, fluoroelastomer, ethylene acrylic, silicone, polytetrafluoroethylene (PTFE).
26. A seal assembly as set forth in claim 20, wherein said inclined segment presents an angle of inclination in the range of 0 to 10 degrees relative to the central axis.
27. A seal assembly as set forth in claim 20, including a collar member connected to said sleeve to secure said sleeve to said flange.
28. A seal assembly as set forth in claim 20, wherein said collar member presents a neck portion and an inclined annular wall defining a seat to receive said annular lip.
29. A seal assembly as set forth in claim 20, wherein said neck portion homogeneously extends from said inclined annular wall to an upper lip and a lower lip defining a nest therebetween to sandwich said flange between said upper lip and said lower lip.
30. A seal assembly as set forth in claim 20, including a rib defined on said upper lip and extending around said upper lip for reinforcement and structural integrity of said collar member.
31. A seal assembly as set forth in claim 20, wherein said collar member is formed from flexible polymeric material.
32. A seal assembly as set forth in claim 20, wherein said sleeve presents frustoconical configuration.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
We claim:
1. An implantable active medical device of the defibrillatorcardiovertor type, including means for sensing ventricular and atrial activity; means for detecting a tachycardia in the sensed activity; means for classifying said detected tachycardia, said classifying means operating in an iterative manner; means for delivering a therapy; and means for selectively controlling the therapy delivering means as a function of the classified tachycardia; wherein the improvement comprises the classification means further comprises means for analyzing said post-therapy detected tachycardia after delivery of a therapy and determining whether said detected tachycardia corresponds to a post-therapy sinusal tachycardia, and means for inhibiting the therapy delivering means from delivering a therapy in response to the determined post-therapy tachycardia being a post-therapy sinusal tachycardia.
2. The device of claim I wherein the classifying means further comprises means for determining an atrial rate and a ventricular rate; means for determining a stability of the ventricular rate; means for determining an association of the atrial and ventricular rates; means for determining whether the ventricular rate is in a predetermined range corresponding to a slow ventricular tachycardia range; and wherein said analyzing means determines a post-therapy sinusal tachycardia as a detected tachycardia having astable ventricular rate, a 1:1 association of atrial and ventricular rates, and a ventricular rate in said predetermined range.
3. The device of claim 2, further comprising means for comparing the ventricular rate to a predetermined frequency limit, wherein the analyzing means further comprises means for determining that the post-therapy detected tachycardia is a post-therapy sinusal tachycardia in response to the ventricular rate being lower than said predetermined frequency limit.
4. The device of claim 3, further comprising means for adjusting the predetermined frequency limit to a limit between 120 and 160 bpm.
5. The device of claim 2, wherein the classifying means further comprises means for determining a ventricular tachycardia in an absence of 1:1 association, and further comprising means for positioning an indicator to a first value before delivery of the therapy, and further comprising means for inhibiting the therapy delivering means from delivering a therapy in response to a determined post-therapy sinusal tachycardia and said indicator being positioned to said first value.
6. The device of the claim 5, wherein the classifying means further comprises means for determining the ventricular rate is out of the slow ventricular tachycardia range, and means for positioning said indicator to a second value before delivery of the therapy, and further comprising means for inhibiting the therapy delivering means from delivering a therapy in response to a determined post-therapy sinusal tachycardia and said indicator being positioned to said first value.
7. The device of claim 2, wherein the classifying means further comprises:
means for comparing the ventricular rate to a predetermined frequency limit and determining whether the ventricular rate is higher than the predetermined frequency limit;
means for determining that the detected tachycardia corresponds to a ventricular fibrillation; and
wherein the analyzing means further comprises means for determining that the post-therapy detected tachycardia is a post-therapy sinusal tachycardia in response to the ventricular rate being lower than said predetermined frequency limit;
said device further comprising means for positioning an indicator to a first value before delivery of a therapy, and means for setting the indicator to a second value in response to the ventricular rate being higher than the predetermined frequency limit; and means for inhibiting the therapy delivering means from delivering a therapy in response to a determined post-therapy sinusal tachycardia and said indicator being positioned to said first value.
8. The device of claim 2, wherein the classifying means further comprises;
means for determining a ventricular tachycardia in an absence of a 1:1 association;
means for comparing the ventricular rate to a predetermined frequency limit and determining whether the ventricular rate is higher than the predetermined frequency limit;
wherein the analyzing means further comprises means for determining that the post-therapy detected tachycardia is a post-therapy sinusal tachycardia in response to the ventricular rate being lower than said predetermined frequency limit;
said device further comprising;
means for positioning an indicator to a first value before delivery of the therapy and setting the indicator to a second value in response to the ventricular rate being higher than the predetermined frequency limit; and
means for inhibiting the therapy delivering means from delivering a therapy in response to a determined post-therapy sinusal tachycardia and said indicator being positioned to said first value.
9. The device of claim 1 wherein the classifying means further comprises means for determining that the detected tachycardia corresponds to a ventricular fibrillation and further comprising means for positioning an indicator to a first value before delivery of a therapy, and means for inhibiting the therapy delivering means in response to said indicator being positioned to said first value and a determined post-therapy sinusal tachycardia.
10. The device of the claim 9, wherein the classifying means further comprises means for determining the ventricular rate is out of the slow ventricular tachycardia range, and means for positioning said indicator to a second value before delivery of the therapy, and means for inhibiting the shock therapy delivering means for delivering a therapy in response to a determined post-therapy sinusal tachycardia and said indicator being positioned to said first value.
11. The device of claim 1 further comprising means for memorizing a determined post-therapy sinusal tachycardia.