Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1982-05-11
1985-10-22
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525039, B60S 104
Patent
active
045479259
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a carrier for a windscreen wiper. The carrier of a windscreen wiper for a motor vehicle is normally an elongate metal member which is detachably connectable to an arm which in turn is more permanently attached to a motor on the motor vehicle. The carrier has means for attachment to a wiper blade which in turn is an elongate piece of resiliently flexible material, normally rubber, which is strengthened by a steel backing strip. The rubber blades get worn in the course of service and need to be replaced. Replacement blades are normally sold ready-attached to a carrier, mainly for the reason that it is a comparatively easy operation to change a complete windscreen wiper comprising carrier and blade, while it is rather more difficult to fit a blade to a carrier where it has to be supported at each end and at intermediate points. However the differences from one motor vehicle to another mean that wiper replacements have to be stocked in a great number of sizes which is a difficult retailing problem and adds to the expense of the replacement unit.
The invention is aimed at reducing the number of carriers required to cover the full range of windscreen wipers.
In accordance with the invention there is provided a windscreen wiper blade carrier which is adjustable at both ends so as to permit the attachment to the carrier of refill wiper blades of a plurality of different lengths.
Preferably the carrier comprises socket means at each tip constructed so as to permit the attachment to the carrier refill wiper blades of a plurality of different lengths.
The main embodiment of the invention which is described hereafter is based upon a carrier comprising a rigid bowed stem. However if desired the carrier may be formed in a plurality of flexibly linked sections. Carriers of this type are known in which the carrier is formed in two hinged sections with the blade conforming generally to the contour of the carrier, the hinge sections being resiliently stressed in the direction of the chord so that the wiper blade conforms to the contour of the windscreen. In the description which follows it will become apparent that the construction of the end portions of the rigid carrier may be readily adapted to a flexible carrier.
In accordance with a preferred form of the invention there is provide a carrier for a windscreen wiper comprising a rigid bowed stem with means for engaging a wiper arm and having a chord length corresponding generally with the length of a wiper blade, socket means at each tip for receiving a respective end of a wiper blade, support means extending from the stem towards the chord for engaging a wiper blade at at least two points intermediate of the tips, the support means comprising respective retainers for engaging with a blade at the said points to resist lateral bowing of a fitted blade and to provide resilient force to press such blade against a windscreen, wherein the socket means are constructed to allow the fitting of blades of a plurality of different lengths.
Preferably the support means comprise resilient arms. However they could be provided e.g. by rigid arms with a spring connection to the stem. The stem may be of channel shape, open to the chord. It may have a central aperture fitted with a pin for receiving a wiper arm tip in the normal way and the support means may comprise a member having a pair of spring arms joined by generally parallel webs formed to seat within the aperture. The webs may each have a recess formed to snap-engage with the pin to hold the support member in position.
In the preferred case, the end portions of the stem are separate from a main stem portion and are telescopically received by the main stem portion, each end of the main stem portion and its corresponding end portion comprising cooperating means for locking the end portion in one of a plurality of predetermined positions to adjust the effective length of the stem. Each stem end portion may be of channel shape and received within the channel of the main stem portion, the latter compris
REFERENCES:
patent: 2663043 (1953-12-01), Oishei
patent: 2713695 (1955-07-01), Oishei
patent: 2772436 (1956-12-01), Deibel
patent: 3922749 (1975-12-01), Castleman, Jr. et al.
patent: 4180885 (1980-01-01), Thornton et al.
patent: 4336625 (1982-06-01), Maiocco
Blackborow Malcolm H.
Langley Marlyn
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