Support arm for surgical light apparatus
First Claim
1. An arm assembly for supporting a surgical lighthead of a surgical light apparatus, the arm assembly comprisinga first arm,a first clevis appended to the first arm and having a pair of separated first flanges, the first clevis including a first stop surface and a second stop surface,a second arm formed to include an interior region, the surgical lighthead being supported by the second arm,a second clevis appended to the second arm and having a pair of separated second flanges, the second clevis including a third stop surface and a fourth stop surface,a pair of pivot pins pivotably coupling each of the pair of second flanges to a respective one of the first flanges so that the second arm and second clevis are pivotable about a main pivot axis relative to the first arm and first clevis, the pivot pins being spaced apart to define a gap therebetween,a rod extending within the interior region of the second arm,a link coupled to the rod and pivotably coupled to the first clevis for pivoting movement about a link pivot axis that is spaced apart from the main pivot axis,a spring extending within the interior region of the second arm, the spring exerting a force on the rod and the link to counterbalance the surgical lighthead, andwherein the second arm and second clevis are pivotable about the main pivot axis relative to the first arm and first clevis between a first position in which the third stop surface engages the first stop surface to limit pivoting movement of the second clevis and second arm in a first direction and a second position in which the fourth stop surface engages the second stop surface to limit pivoting movement of the second clevis and second arm in a second direction, the link moving into the gap between the pair of pivot pins during movement of the second arm and second clevis between the first position and the second position.
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Accused Products
Abstract
An arm assembly for supporting a surgical lighthead of a surgical light apparatus includes a first arm and a first clevis appended to the first arm and having a first stop surface and a second stop surface. The arm assembly also includes a second arm formed to include an interior region and a second clevis appended to the second arm and having a third stop surface and a fourth stop surface. The surigcal lighthead is supported by the second arm. The second arm and second clevis are pivotable about a main pivot axis relative to the first arm and first clevis between a first position in which the third stop surface engages the first stop surface to limit pivoting movement of the second clevis and second arm in a first direction and a second position in which the fourth stop surface engages the second stop surface to limit pivoting movement of the second clevis and second arm in a second direction
87 Citations
21 Claims
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1. An arm assembly for supporting a surgical lighthead of a surgical light apparatus, the arm assembly comprising
a first arm, a first clevis appended to the first arm and having a pair of separated first flanges, the first clevis including a first stop surface and a second stop surface, a second arm formed to include an interior region, the surgical lighthead being supported by the second arm, a second clevis appended to the second arm and having a pair of separated second flanges, the second clevis including a third stop surface and a fourth stop surface, a pair of pivot pins pivotably coupling each of the pair of second flanges to a respective one of the first flanges so that the second arm and second clevis are pivotable about a main pivot axis relative to the first arm and first clevis, the pivot pins being spaced apart to define a gap therebetween, a rod extending within the interior region of the second arm, a link coupled to the rod and pivotably coupled to the first clevis for pivoting movement about a link pivot axis that is spaced apart from the main pivot axis, a spring extending within the interior region of the second arm, the spring exerting a force on the rod and the link to counterbalance the surgical lighthead, and wherein the second arm and second clevis are pivotable about the main pivot axis relative to the first arm and first clevis between a first position in which the third stop surface engages the first stop surface to limit pivoting movement of the second clevis and second arm in a first direction and a second position in which the fourth stop surface engages the second stop surface to limit pivoting movement of the second clevis and second arm in a second direction, the link moving into the gap between the pair of pivot pins during movement of the second arm and second clevis between the first position and the second position.
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11. An arm assembly for supporting a surgical lighthead of a surgical light apparatus, the arm assembly comprising
a first arm, a first clevis appended to the first arm and having a pair of separated first flanges, a second arm formed to include an interior region, the surgical lighthead being supported by the second arm, a second clevis appended to the second arm and having a pair of separated second flanges, the second flanges being pivotably coupled to respective first flanges so that the second arm and second clevis are pivotable about a main pivot axis relative to the first arm and first clevis, a rod extending within the interior region of the second arm and having spaced apart first and second end surfaces, a link pivotably coupled to the rod adjacent to the first end surface, the link having a portion pivotably coupled to the first clevis for pivoting movement about a link pivot axis that is spaced apart from the main pivot axis, a spring extending within the interior region of the second arm, and an adjuster threadedly coupled to the rod, the adjuster including a rod-engaging portion and a spring-engaging portion, the rod-engaging portion having a first end face facing toward the second clevis, the spring-engaging portion having a second end face facing away from the second clevis, the spring being compressed between the spring-engaging portion and the second clevis so as to exert a force on the rod and the link to counterbalance the surgical lighthead, the adjuster being movable relative to the rod between first and second positions to adjust compression of the spring, and the second end surface or the rod being positioned to lie between the first and second end faces when the adjuster is in any position between the first and second positions.
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16. An arm assembly for supporting a surgical lighthead of a surgical light apparatus, the arm assembly comprising
a first arm, a first clevis appended to the first arm and having a pair of first flanges that are separated to define a first space therebetween, a second arm formed to include an interior region, a structure coupling the surgical lighthead to the second arm, a second clevis appended to the second arm and having a pair of second flanges that are separated to define a second space therebetween, at least a portion of the pair of first flanges being positioned to lie in the second space such that each first flange is adjacent to a respective one of the second flanges, the second flanges being pivotably coupled to respective first flanges so that the second arm and second clevis are pivotable about a main pivot axis relative to the first arm and first clevis, a rod extending within the interior region of the second arm, a link coupled to the rod and having a portion positioned to lie in the first space and pivotably coupled to the first clevis for pivoting movement about a link pivot axis that is spaced apart from the main pivot axis, a spring extending within the interior region of the second arm, the spring exerting a force on the rod and the link to counterbalance the surgical lighthead, and a space filler positioned to lie in the first space, each first flange having a first edge, each second flange having a second edge, and the space filler having a third edge, the third edge substantially spanning the first space between the first flanges, and the third edge cooperating with the first edge to substantially span the second space between the second flanges.
Specification