Back to results
US 4,339,839 AGranted
Windscreen wipers
AssigneeKnights, Brooks and Partners Limited
InventorRobert E. Knights
Life of this patent
Estimating the term…
Abstract
A windscreen wiper comprises a carrier adapted for mounting on a windscreen wiper arm and for supporting a pair of spaced parallel wiping lips which, in use, together with the windscreen surface bound a space into which cleaning fluid can be introduced and a brush or plastics material step device in said space, the cross-sectional area of the carrier being constant throughout its length.
Claims16
A windscreen wiper comprising:
- an elongate blade carrier,
- a flexible blade arrangement mounted on the carrier, the blade arrangement including a pair of longitudinally extending parallel spaced resilient lip members adapted to engage a windscreen surface so as to bound a hollow space which is closed in use by the windscreen,
- at least one conduit for cleaning fluid communicating with said space, and
- a longitudinally extending resilient screen scrubbing arrangement mounted in the hollow space between but spaced from the lip members, the scrubbing arrangement when in use contacting the windscreen surface,
- the blade carrier, the blade arrangement, and the scrubbing arrangement each having a constant cross-section along its entire length, a recess in one of the blade carrier and blade arrangement for accommodating the scrubbing arrangement,
- the blade arrangement and the scrubbing arrangement each being uniformly longitudinally flexible at all points along its length.
3 more elements
Dependencies are inferred from the claim text.