Qualification Of The Prosthetist; Vacuum Pump; Technical Data - Otto HarmonyP3 4R147 Instrucciones De Uso

2.4 Qualification of the prosthetist

The fitting of a patient with a Harmony System may only be carried out by prosthetists who have
been authorized by Ottobock after completion of a corresponding training course.
2.5 Function
2.5.1 Description of the components (Fig. 1)
(1) Shaft
(2) Base
(3) Clamp Ring
(4) Functional Ring
(5) Intake Valve
(6) Expulsion Valve

2.5.2 Vacuum pump

The Harmony P3 is an mechanical pump that can create an elevated vacuum in a prosthetic
socket, thereby improving the connection between the amputee and the prosthesis. The system
consists of a polyurethane liner, an airwick, a rigid socket (which is connected to the pump), a
sealing sleeve and the Harmony P3 Pump.
Once the environment is sealed, the Functional Ring – which is compressed and released during
normal walking – draws air from the socket through one-way valves and evacuates it through the
pump. After multiple cycles of compression an elevated vacuum of 508-847 mbar (15 – 25 inHg)
is created in the sealed socket environment.
2.5.3 Shock absorption and rotational function
The Functional Ring in the Harmony P3 Pump has a shock absorption and rotational function
that help to reduce vertical and torsional forces in the extremities during walking. The result is an
improvement for both the function and loading situation of the prosthesis wearer.

3 Technical data

Pump Weight
Pump Height
Pump System Height
Weight range
Torques
Material
­armonyy3 44147
All manuals and user guides at all-guides.com
4R147 Harmony P3 Pump
425 grams
117 mm (4.6in)
175 mm (6.9 in)
40 – 125 kg (88 – 276 lbs)
Receiver Set Screws (Fig. 2, items 7 & 8): 15 Nm (133 in-lbs)
Clamp Ring Screw (Fig. 2, item 9): 10 Nm (88 in-lbs)
Retaining Screw (Fig. 5, item 10): 7 Nm (60.0 in-lbs)
Aluminium/Titanium/Nylon
Ottobock | 15