Patent GB-669730-A (GB)
Title: Improvements in or relating to a windshield cleaner
IPC: B60S1/34
Filed: 1950-06-26
Abstract: 669,730. Windscreen cleaners. TRICO PRODUCTS CORPORATION. June 26, 1950 [Aug. 30, 1949], No. 15942(50. Class 138 (i). A windscreen cleaner comprises a pneumatic motor having a shaft journalled in the motor casing, which shaft has an extension unit comprising a sleeve having a shaft journalled therein and secured against axial displacement, one end of the unit shaft having a coupling part engageable with a mating coupling part of the motor shaft, and the other end of the unit shaft being connectible to a wiper arm, and means for anchoring the sleeve to the motor casing thereby securing the two shafts coupled together. The pneumatic motor 1, Fig. 1, comprises a casing. having a removable cover.2 and provided with a chamber to receive a piston or vane 3 fixed to a. shaft 4 journalled in bearings, at the opposite sides of the casing, of which one, 7, is shown. The shaft 4 extends into a counterbore 8 in the casing and is formed at its end with a coupling part 9. An extension unit for coupling to the shaft 4 comprises a sleeve 10 having an extension shaft journalled therein. The extension shaft comprises a central section 11 and enlarged heads 12 and 14 at each end, the heads being secured, to the. knurled ends 16 of the shaft 11 with pressed fits. The' head 12 isformed with a coupling part 13 for coacting,with the part 9. The head 12 is secured against axial displacement relative to the sleeve 10 by abutting a shoulder 18 in a counterbore therein which also receives the shaft 4. The outer end of the shaft 11 is journalled in a bronze bushing 17 received in another counterbore in the sleeve 1.0. The head 14 is adapted for operative connection to a wiper 15 as by means of a nut 27. The sleeve 10 is anchored in the counterbore 8 in the motor casing by one or more pins 19 which pass through openings in the motor casing and engage in peripheral chordal slots in the exterior surface of the sleeve. When the sleeve is so anchored in position the coupling parts 9 and 13 are secured together. The outer surface of the sleeve is threaded at its outer end to receive a clamping nut 22 by which the motor 1 is secured to a frame structure 23 of the vehicle. Two other forms of sleeves are described with reference to Figs. 4 and 5 (not shown) and relate to means for securing the shaft 11 and head 12 against axial displacement in the sleeve. An alternative head 14 for connection with a different type of wiper arm is also described with reference to Fig. 2 (not shown). The control valve 32 for the motor is operable by a slide member 33 provided with a downturned end 34. Threaded into the end 14 is a manually shapeable shank 35 and the other end of the shank is threaded into a knob or handle 36. Preferably the shank is in the form of a pliable self-sustaining wire core 37, so as to be capable of retaining its manually imparted shape when pushed or pulled, which core is enclosed in a coiled flexible wire sheath. The handle may thus be positioned so as to be accessible to the driver. By utilizing different extension units and handle shanks the motor 1 can be adapted to various models of vehicles.