Marine Systems > Linear Window Wipers

McNab Linear Window Wipers Model A & B

Model A & B Linear Wipers are superior to conventional non-linear wipers in all applications requiring a wide peripheral viewing area during all kinds of inclement environmental conditions.

Typical Applications

Marine and inland waterway use –

Model A & B Linear Window Wipers are ideally suited for vessels working inland waterways, rivers, estuaries, and coastal waterways.  Solid construction enables these wipers to operate effectively under rolling and pitching conditions.  Heavy duty arms and blades keep the windows clear of mist, spray, snow, and ice.

Huge vehicles such as those employed in the mining, lumber and other heavy-duty construction industries often times operate under extremely harsh conditions.  The rugged Model A & B Linear Wiper provides a wide field of clear vision under all conditions, even when windows are being covered with wet dust or splattered by mud.

US navy approval has been granted on the McNab wipers where heavy-duty green water operations are anticipated and patrol duty requires operation under extremely harsh conditions. The rugged McNab Linear Wiper provides a wide field of clear vision under all conditions, due to its greater pounds per square inch at the blade contact edge.

Features

Typical wiper blade

• Suitable for All Types of Windows – Model A & B Linear Window Wipers can be installed for fixed, angled, and sliding windows, glass or  Plexiglas.  A spring tensioned hinge on the wiper blade arm assembly allows the blade arm assembly to swing back more than 75 degrees that Model A & B Wipers may even be used for hinged windows.

• Simple and Quick Installation – Four mounting screws or bolts and a single drive shaft hole through the mounting surface.  Cutting of the widow glass is not required.  Although it is generally preferable to mount the wiper above the window, the wiper may be mounted below the window and operate with equal efficiency.

• Noncorrosive Construction - Model A & B Linear Window Wipers are designed to perform year after year in the worst environments.  All components are constructed of stainless steel or other materials resistant to corrosive elements.

• Variable Speed Option Available - A continuously variable speed control is available to match most motor options (except 12 VDC commutator).

• Electric De-icing - The Model A & B Linear Window Wiper may be supplied with an optional electric de-icer, in order to prevent ice from building up on the wiper mechanism under icing conditions.

• Adjustable Fresh Water Spray Jet with Pump Accessory - The spay jet may be rotated and aimed at any point on the window from inside, permitting complete and easy cleaning of the window whenever necessary.  The spray jet is operated by a self-priming foot pump.  Window de-icer fluid or antifreeze may be added to the cleaning water to provide a de-icing solution that will keep the window clear of ice during' even the worst weather.

• Dual Bladed Wipers - Two blades are operated from a single wiper assembly to cover very large widows or smaller side-by-side widows.  Consult McNab, Inc., for particulars.

Description

The Model A & B Linear Window Wipers are designed to clear vision obstructing material from the exterior windows of coastal/inland waterway vessels, heavy duty construction equipment, or any purpose requiring a clean, widespread field of view during vision impairing environmental conditions.  They install simply and easily and have a reputation for reliability over an extended  period of service.  Model A & B Wipers are available in three standard stroke  lengths (horizontal area cleaned): 15, 21, and 27 inches, and a standard blade length (vertical area cleaned) of 14 inches.  Other stroke lengths and blade lengths are available when ordered specially, as are special configurations such as the motor mounted on the opposite end of the housing: consult McNab, Inc.  (ask for form MWW0479, Rev.  B).

See Detail

The Model A & B Wiper assembly is composed of an attractive white finished, exterior mounted, aluminum alloy wiper housing containing a corrosion resistant drive belt, drive pulley, and tension-adjustable idler pulley (see diagram).  Attached to the drive belt by means of a carriage assembly is the wiper arm, and affixed to it is the wiper blade.  A spring at the top of the wiper arm supplies the tension necessary to hold the wiper blade firmly against the window.  The drive pulley is rotated by a drive shaft which protrudes through a hole drilled in the bulkhead or firewall to the internally mounted electric drive motor.  For single speed wipers, an on/off toggle switch controls the wiper, and a sturdy rheostat is provided for variable speed wipers.  Table 1 gives approximate speeds with respect to stroke length for the single and variable speed wipers.  Variable speed wipers may be continuously adjusted up to the maximum for a given stroke length.

Table 1. Stroke Length vs. Speed