US 10,376,396 B2
Coupling units for medical device delivery systems
Ashok Nageswaran, Irvine, CA (US); Cong Dang, Garden Grove, CA (US); Aaron Barrett, San Clemente, CA (US); and James Phan, Santa Ana, CA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Jan. 19, 2017, as Appl. No. 15/410,444.
Prior Publication US 2018/0200092 A1, Jul. 19, 2018
Int. Cl. A61F 2/90 (2013.01); A61F 2/95 (2013.01); A61F 2/966 (2013.01); A61F 2/82 (2013.01); A61F 2/86 (2013.01)
CPC A61F 2/90 (2013.01) [A61F 2/95 (2013.01); A61F 2/966 (2013.01); A61F 2/86 (2013.01); A61F 2002/823 (2013.01); A61F 2002/9505 (2013.01); A61F 2002/9665 (2013.01); A61F 2230/0069 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stent delivery system, comprising:
a core member having a distal segment;
a coupler positioned about the core member distal segment and rotatably and slidably coupled to the core member, the coupler comprising a rigid plate having:
a first substantially flat end surface,
a second substantially flat end surface,
a side surface extending between the first and second end surfaces, the side surface comprising one or more projections separated by recesses, wherein a maximum diameter of the first and second end surfaces is at least 5 times greater than a length of the side surface, and
an aperture extending through the first and second end surfaces and receiving the core member therethrough, the aperture defining a radial gap between an outer surface of the core member and an inner surface of the coupler, the gap configured to permit the coupler to slide and rotate with respect to the core member distal segment;
a proximal restraint coupled to the core member distal segment at a position proximal to the first plate,
a distal restraint coupled to the core member distal segment at a position distal to the first plate,
one or more second rigid plates slidably and rotatably coupled to the core member distal segment between the proximal restraint and the distal restraint;
one or more spacers coupled to the core member distal segment between the proximal restraint and the distal restraint; and
a stent extending along the core member distal segment such that an inner surface of the stent is engaged by the one or more projections of the coupler,
wherein the proximal restraint and the distal restraint are spaced apart along the core member by a longitudinal distance that is greater than the combined length of the first and second rigid plates and the one or more spacers coupled to the core member distal segment between the proximal restraint and the distal restraint.