B - Operations – Transporting – 60 – S
Patent
B - Operations, Transporting
60
S
141/9
B60S 3/06 (2006.01)
Patent
CA 1039460
ABSTRACT OF THE DISCLOSURE A control system for car washing apparatus having a primary arm pivotally supported at one end and extending rearwardly along the path of the car, a secondary arm pivotally supported on the free end of the primary arm and extending across the path of the car, and a rotary brush on the free end of the secondary arm. A piston and a cylinder are connected between the primary and secondary arms, and the rod and butt ends of the cylinder are connected through flow controls to the control inlets of a 4-way valve. The 4-way valve controls a primary arm piston and cylinder which retract and extend the primary arm as required. When a car strikes the brush, the pressure increase at one end of the secondary arm cylinder pilots the 4-way valve, operating the primary arm piston and cylinder. When the brush passes the front corner of the car and the secondary arm begins to unfold, the pressure increase at the other end of the secondary arm cylinder pilots the 4-way valve oppositely, reversing the primary arm movement. The butt end flow control is sufficiently open to prevent at low car speeds false piloting but is restrictive enough to pilot the 4-way valve at car speeds above 10 feet per minute. Fluid bypass at high car speeds is provided by a relief valve in parallel with the butt end flow control.
225038
Barber Ivan J.
Whetham Calvin
LandOfFree
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