DAEDALUS TECHNOLOGIES, INC.
MAKING TECHNOLOGY MORE ACCESSIBLE
Fitting the DAESSY Rigid Mount - DRM1 and DRM1ROP
Determine the Vertical Tube Length and Shape
Background
The Vertical Tube of the DRM1 is supported in the Frame Clamp Outer Piece and connected to the Horizontal Tube by the Tube Connector (TC90). Often the correct position for the device requires the Horizontal Tube to be offset forward or backwards from the location of the Frame Clamp Outer Piece and the Vertical Tube will have two bends to form an S-shape that offsets the ends of the tube. On some wheelchairs an offset may be needed to allow the upper end of the Vertical Tube to clear a lap tray or control module.
Vertical Tube dimensions (Length and Offset)
Two measurements are needed to determine the length and shape of the Vertical Tube. As shown in the diagram, these measurements are the horizontal distance (X) and vertical distance (Y) up the side of the wheelchair, between the Frame Clamp Outer Piece and the intended location of the Horizontal Tube. These measurements must be taken from the location of the Frame Clamp Outer Piece not the location of the Frame Clamp Inner Piece. When an Offset Link is used the Outer Piece will not be located at the same place as the Inner Piece.
When the DAESSY Quick Release is used to attach the device to the Horizontal Tube the centerline of most devices is between 1 inch and 3 inches forward of the tube (away from the user). For very precise horizontal positioning contact Daedalus Technologies Inc. for more information.
Interference between the Vertical Tube and Fittings on the Wheelchair
Fittings on the wheelchair between the location of the Frame Clamp Outer Piece and the position of the Horizontal Tube may interfere with the Vertical Tube. Sometimes this can be avoided by the correct placement of the S-bend. This is often possible when the S-bend can be nearer one end of the tube with the offset above the obstruction.
Position and Orientation of S-Bend
The S-bend on the Vertical Tube can be placed near one end of the tube or at the midpoint. The standard tube shown in the "Parts" has 4 inches of straight tube at one end and 12 inches at the other. Either end may be at the top or bottom and the only limit on the location of the bend is that the shortest straight end possible is 2 inches.
Interference within 10 inches of the Frame Clamp Location
When the obstruction is directly above the location of the Frame Clamp Inner Piece and at a distance of less than 10 inches it may not allow sufficient clearance for the Vertical Tube to be lowered into the hole in the Frame Clamp Outer Piece. When the Frame Clamp Inner Piece is located very low on the wheelchair frame or above the front caster wheel height adjustment of the mount by moving the Index Clamp up and down the Vertical Tube will be limited to the amount of clearance between the bottom of the Frame Clamp Outer Piece and the obstruction. In both these cases it may be necessary to use an Offset Link (O3L) or Spacer (UFCSPCR) to move the Outer Piece away from the location of the Inner Piece.
Specifying the Dimensions of the Vertical Tube
When the X and Y measurements are used for specifying the length and offset the Vertical Tube supplied will have 4 inches of straight tube at one end. X will be the S-offset distance. The length will be the Y measurement rounded up to the nearest even number of inches. When the S-bend must be a different distance from the end, or when extra length is added to provide a greater range of height adjustment the complete specification described in the section on S-Tubes should be used.
Steps in Fitting Procedure:
Fitting the DRM1 has the following steps:- Selecting a Frame Clamp location
- Measuring and Specifying the Frame Clamp Size
- Determining the Vertical Tube length and shape
Rigid Mount