LTI Locking Shoulder Joint
Shoulder Joint
The LTI Locking Shoulder Joint is supplied as an exoskeletal version. The SJ90 joint is supplied with aconvenient exoskeletal humeral mounting plate. This can be converted to an endoskeletal joint, by obtaining
the Endoskeletal Adapter Kit (SJ62). The joint is normally attached to the socket with a mounting ring. If thesocket does not have adequate stiffness to support this joint, an optional 3-spoke mounting plate (SJ60) canbe substituted providing exceptional strength.

SJ90 LTI Locking Shoulder Joint, Endoskeletal, Manual Lock Actuator
This joint has an mechanical lock actuator
For remote lock actuation, use one of the mechanical release levers:
The joint is supplied with the exoskeletal plate attached.

SJ92 LTI Locking Shoulder Joint, Endoskeletal, Electric Lock Actuator
This joint has an electric lock actuator
For electric lock actuation, a cable, switch, battery and charger are required
The joint is supplied with the exoskeletal plate attached.

Lock Releases
This joint can be controlled in several ways; the user can simply activate the lever on the side of the joint tounlock it, use a remote lock release lever, use a chin-activated nudge switch or use an optional powered
actuator for the users convenience. To simplify fabrication, the activation lever can be repositioned to any
convenient location around the perimeter of the joint.
Alternatively, a Lock Release on a cable can be used to provide better access. The SJ43L and SJ44R are
spring-loaded and alternately lock and unlock the shoulder joint flexion/extension. These releases merely
reposition the manual unlock making it more convenient for the user to operate the lock release lever with
their sound-side hand. These Lock Release Kits contain the release mechanism with a mounting plate, alow-friction Teflon-lined cable and a joint mounting plate with a cable alignment/adjustment piece. The
SJ45L and SJ46R are “nudge switches” intended for chin activation. The optional Motor-Driven Lock/Unlock(SJ77) will perform these same actions. It is operated by any convenient switch.

SJ43L Lock Release Kit, Spring Loaded, Left
With this spring-loaded release, the joint may be switched from locked tounlock and back alternatively.
For use with SJ90 Locking Shoulder Joints

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LTI Locking Shoulder JointSJ44R Lock Release Kit, Spring Loaded, Right
With this spring-loaded release, the joint may be switched from locked tounlock and back alternatively.
For use with SJ90 Locking Shoulder Joints

SJ45L Lock Release, Sierra Nudge Control, Left
Supplied with cable alignment/adjustment plate
Use this release to momentarily unlock the joint.
For use with SJ90 Locking Shoulder Joints

SJ46R Lock Release, Sierra Nudge Control, Right
Supplied with cable alignment/adjustment plate
Use this release to momentarily unlock the joint.
For use with SJ90 Locking Shoulder Joints

Shoulder Joint Accessories:
SJ53 Boston Arm Adapter, Endoskeletal
Adapter kit for connecting a Boston Digital Arm to an LTI Locking Shoulder
Joint (SJ90)

SJ55 Boston Arm Trial Fitting Adapter
An adapter especially for trial fittings. Both the length of the humeral section
and the angle of the elbow turntable can be adjusted. Supplied with bent
and slotted attachment plate. When used with Adjustable Check Socket
Collar (BE309), angle can be adjusted off-axis up to 7°.
Adapter can be rented – call LTI 800-437-0024

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LTI Locking Shoulder Joint
SJ60 3-Spoke Mounting Plate
Because it can be readily shaped with bending irons, this plate is often
used for trial fittings even though the standard mounting ring will be
used on the definitive prosthesis

SJ61 Spare Exoskeletal Attachment Plate
The plate measures 5.45” x 1.25” (137mm x 32mm) with mounting holes
on both ends of plate allowing it to be mounted in either direction,straight or angled.

SJ62 Endoskeletal Adapter Kit
This kit contains a 20 mm diameter tube with suitable stainless steel
attachment clips. The tube is often used during a trial fitting after which
the endoskeletal plate may be used in the definitive prosthesis.

SJ63 Straight Mounting Plate
Because it can be readily shaped with bending irons, this plate is often
used for trial fittings even though the standard mounting ring will be
used on the definitive prosthesis

SJ77 Electric Lock Conversion Kit for SJ90
This small actuator assembly mounts just below the SJ90 joint and will notinterfere with its motion.
For electric lock actuation, a cable, switch, battery and charger are required

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LTI Locking Shoulder Joint
SJ81 Adapter-Cable, SJ77, for Bock Switch
Operates using most Bock dual-action switches, i.e. 9X14, 9X18, or 9X25 (butnot 9X37) or the VASI BE234 Dual-Action Push Switch, Bock compatible.
A 9E185=30, =40 or =50 extension cable may be required. Supplied with plugs
to connect to the SJ77/SJ92, any Bock compatible switch, and any LTI Type “S”
built-in battery.

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