Coyote Air-Lock Properties

A lightweight, dual-suspension pin system designed to combine suction suspension comfort with pin suspension security. The airtight seal prevents air from coming into the bottom of the socket, creating suction and reducing pistoning even without a sleeve!

Also available with a longer pin for patients who struggle with pin engagement.

  • Suction allows for less traction on the limb for increased comfort and decreased liner wear
  • Expulsion valve or suspension sleeve are not needed to maintain suction in most cases
  • Water-resistant
  • Do not use with elevated vacuum
  • Dual suspension, suction pin lock system
  • Gain extra suspension even without a sleeve
  • Reduces pistoning and traction on end of limb
  • Improves suspension and comfort
  • Decreases distal pressure
  • Single-stage lamination
  • Offset alignment capability
Coyote Air-Lock Creating Suction Graphic

Air-Lock Sizes and Depth

CD103 | Air-Lock  

84 grams, 2.26″ diameter

350 lb weight limit

Build height: 1.77″

Amputation Type: AK, BK

Activity Level: Any

Patent No. 6334876

CD103M |  Medium Air-Lock  

57 grams, 1.85” diameter

350 lb weight limit

Build height: 1.71”

Amputation Type: AK, BK, UE, Peds

Activity Level: Any

CD103S |  Small Air-Lock  

35 grams, 1.24” diameter

350 lb weight limit

Build height: 1.62”

Amputation Type: AK, BK, UE, Peds

Activity Level: Any

CD103D | Deep Air-Lock  

Deeper housing to accept the long pin. Ads extra .25″ of length to the pin. Includes most parts of fabrication.

Pin and connector sold separately

Build height: 2.19″

350 lb weight limit

CD103MD | Medium Deep Air-Lock  

57 grams, 1.85” diameter

350 lb weight limit

Build height: 2.125”

Amputation Type: AK, BK, UE, Peds

Activity Level: Any

CD103SD |  Small Deep Air-Lock  

Deeper housing to accept the long

pin. Adds extra 0.350” of length to pin.

Includes most parts for fabrication. Pin and Connector sold separately.

Build height: 2.01”

350 lb weight limit

Coyote Air-Lock Distscription

PINS ARE SOLD SEPARATELY and come 2 per package

To view the Build Height Sheet 

Which pin to choose?
The two-part pin has been our standard for years.
The solid brass pin can be quieter and has a higher pull strength.
The thread is determined by which liner you choose.

Air-Lock Lamination Instruction Video

Very thorough instructions of entire prosthetic fabrication process using Coyote CD103 Air-Lock.  Video depicts layup, lamination and finishing of prosthetic.  The layup uses Coyote Composite and Coyote Design’s CD103AF Alignable Connector. The lamination uses modified acrylic resin (Nano Resin). The cast is modified with the StabileFlex Transtibial Socket Design.

If lock plate replacement is happening frequently make sure you are adjusting pin spacers to minimize pistoning. If the prosthetic is used in a gritty, sandy environment you might have the patient clean out the bottom of the socket more frequently.

CD103LP – is the part number for the replacement lock plate which includes three replacement springs. This part can be used for the Air-Lock, Small Air-Lock, Medium Air-Lock, Drop-In Air-Lock, and the Air-Lock Locking Lanyard. 

Prosthetic arm is using a Small Air-Lock with a deep recess for the button. This recess was created by using a CD103ELD  Exo Lamination Plug during fabrication. The button is capped with a CD103RBC Release Cover Button filling the hole nicely, giving the recessed hole a more finished look while making the button more comfortable to push.

The CD103RBC Release Botton Cover can give a more finished look when using the Exo Lamination Plug.

The Release Button Cover is added to end of release button to make it easier for patients to release the lock. Ideal for geriatric patients or others with lower dexterity or limited hand strength

The recessed button in this

Air-Lock transtibial socket was fabricated using the CD103ELD  Exo Lamination Plug .

Coyote Design’s prosthetic locks are made to stand up to the elements so you can participate in whatever life brings.

CD103L or CD117L |  Locking Lanyard

Airtight, water-resistant, lanyard lock

  • – The lanyard pin helps elongate the limb when donning.
  • – The pin gives audible confidence of engagement.
  • – The o-ring at the end of the pin creates an airtight socket helping to reduce air noise.

Same simple fabrication as the Deep Air-Lock and Deep Easy-Off Lock pin systems.

It is recommended to use the Deep Air-Lock or Deep Easy-Off Lock with the Locking Lanyard Pin.

Coyote’s Small Air-Lock and Medium Air-Lock can also be used for pediatric prosthetics.

Our prosthetic locks are sand, mud and water-resistant which is a great attribute for prosthetics for children.

Let kids be kids.

Pin lock wear and care instructions

Single Lamination and Offset Fabrication
The fabrication procedure for the Air-Lock and Easy-Off Lock is a time and money saver. The Alignable Connector is attached to the lock in the desired location for prosthetic alignment, allowing the lock to remain in ideal lock alignment for easy engagement. A single lamination is done that incorporates the lock and the connector into the socket. The offset capability saves money by eliminating need for offset components, and saves time with a single lamination and easy component setup.

Billing Information Recommended Codes

L5671   Addition to lower extremity, Below Knee/Above Knee suspension locking mechanism (shuttle, lanyard or equal), excludes socket insert.

L5647*    Addition to lower extremity, Below Knee, suction socket.

L5652*   Addition to lower extremity, suction suspension, Above Knee or Knee Disarticulation Socket.

L6698    Upper extremity addition, Below  Elbow / Above Elbow Lock Mechanism, Excludes socket insert.

L6686*   Upper extremity addition, suction socket.

*Not recommended for billing Medicare. Coyote® believes that “suction” in a prosthetic refers to the negative pressure created inside the socket, rather than componentry such as an expulsion valve or sleeve. Because we think of suction as a function, we believe it should be permitted to bill L5671 in conjunction with the L5647 or L5652 in cases when it is medically necessary. As with other situations where multiple suspension methods are used and billed we feel the combination of a lock and suction helps to increase safety for the patient.

For more information on billing the Air-Lock and on our socket pressure study between airtight and traditional pins contact Coyote.

The listing of codes with our products should not be construed as a guarantee for coverage or payment.

The ultimate responsibility for the coding of services/products rests with the individual practitioner.


CD118P Locking Lanyard Pin

Air-Lock Instruction videos

Thorough video of entire Air-Lock fabrication process.

Fabrication for Locking Lanyard Pin and 5 Degree Connector.

Air-Lock & Easy Off Lock – Step1 – Installing lock on mold

Air-Lock & Easy Off Lock – Step 2 – Drape Molding Check Socket Fabrication Instructions.

Air-Lock & Easy Off Lock – Step 3 – Transferring Alignment CD103

Air-Lock & Easy Off Lock Step 4Layup CD103 and CD117 Easy Off Lock

Air-Lock and Easy-Off Lock -Step 5- Finish

How to install Coyote Brass Pin the CD103P8H

CD103P8 Pin Adjustment

Sealing leaky prosthetic socket

CD103FD Flexible Inner Socket with and without Coyote Fabrication Dummy

Salvaging Coyote Lock Parts

Blister forming Air-Lock test socket with connector

Blister forming Air-Lock test socket without connector

How to take an Air-Lock apart

Patient Air-Lock Maintenance.

Modifying Air-Lock for long pin