Ottobock 3R15 Manual Del Usuario página 7

1 Components and Service Parts
(fig. 1), (Components of Titanium in brackets)
(1) 4 G30=N Upper Joint Section
with Pyramid
(2) 4 G208 Lower Joint Section
(3) 4 G20=N (4G145) Swing Block
(4) 4 G28 Knee Axis
(5) 4 A62=N Swing Axis
(6) 4 G26 Pressure Block
(7) 5 06G3=M6x12 Set Screw
(8) 4 G38 Plastic Block
(9) 4 L7=2 Compression Spring
(10) 4R36 Plastic Guide Pin
(11) 4Z32 Stance Control Adjustment Screw
(12) 4G37 Extension Stop*
(13) 4Z46 Bumper*
(14) 501T8=M4x6 Fillister Head Screw*
2 Description and Function
2.1 Application
The monocentric 3R15 (stainless steel) and 3R49 (titanium) Modular Knee Joints with a
stance phase friction brake activated by weight bearing were designed to be used
exclusively for the prosthetic fitting of lower extremities.
According to the Otto Bock Classification
recommended for transfemoral amputees with moderate functional demands (high
degree of stance phase stability and moderate swing phase control) and a body weight up
to 100 kg/220 lbs. Also suitable for amputees with lower functional levels who desire to
avoid using a locking knee. Not recommended for amputees with higher functional levels.
The joint is especially suited for above-knee amputees who require a high degree of stability.
The brake increases the stability of the knee and, for example, compensates for weak
musculature.
2.2 Construction
The Swing Block (3) is connected to the Upper Joint Section (1) through the Swing Axis (5)
and with the Lower Joint Section (2) through the Knee Axis (4). The slotted Swing Block (3)
accepts the slotted Brake Bushing (15) which surrounds the knee axis. During weight
bearing, resistance to movement between the knee axis and brake bushing increases the
stability of the knee.
In the unloaded condition the Compression Spring (9) and the elasticity of the Swing Block
(3) release the brake effect.
Extension of the knee joint is provided by the Extension Assist (20–25). The Extension
Assist Cable (20) runs round the Distal Anchor Shell (21) and is hooked to the Swing Axis (5)
(fig. 2) with the end of the Extension Assist Cable pointing to the rear (fig 3, arrow).
3 Alignment
The starting point for correct alignment is the determination of the individual weight bearing
line and the transfer of these values to the components in the prosthesis according to the
illustrated alignment recommendations (see illustration).
(15) 4B74 Brake Bushing*
(16) 4G31 Bushing Safety Device*
(17) 4Z47 Axis Screw*
(18) 4Z60=25 Brass Washer*
(19) 507S16=10x1 External Lock Ring*
(20) 21Y113=2 Extension Assist Cable*
(21) 21Y66 Distal Anchor Shell
(22) 21Y67 Adjustment Ring
(23) 506G1=M8x25 Adjustment Screw*
(24) 513D28 Compression Spring
(25) 21Y70 Flexible Plastic Cover
(26) 4Z60=17 Brass Washer*
(27) 4Z59=4x6 Extension Stop*
(28) 501Z2=M6x20 Cap Screw*
*Service Parts
©
System these monocentric knee joints are
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