US4339839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windscreen wipers
Assignee: Knights Brooks and Partners Ltd
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Filing: 1980-03-14
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Granted: 1982-07-20
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Expires: 2000-03-14
Abstract
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.
Inventors
- 👤 Robert E. Knights
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/46; B60S1/48; B60S1/52; B60S1/522; B60S1/524; B60S1/04; B60S1/32; B60S1/38; B60S2001/3812; B60S2001/3817; B60S2001/3818; B60S2001/3827; B60S2001/3829; B60S2001/3834; B60S2001/3836; B60S2001/3837
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
145 words
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.
Claim 2
Dependent Claim
145 words
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.
Claim 3
Dependent Claim
17 words
A windscreen wiper as claimed in claim 1, in which the blade carrier is an extruded element.
Claim 4
Dependent Claim
23 words
A windscreen wiper as claimed in claim 2, in which the blade carrier is uniformly longitudinally flexible at all points along its length.
Claim 5
Dependent Claim
71 words
A windscreen wiper as claimed in claim 1, in which the blade carrier has two side members and a cross member, each side member at its base having an inwardly directed flange adapted to be accommodated in a longitudinal groove formed in a side of the blade assembly, and the blade assembly comprises said two lips and a cross member in which a back portion of the scrubbing arrangement is mounted.
Claim 6
Dependent Claim
45 words
A windscreen wiper as claimed in claim 1, in which the blade carrier has two side members and a cross member and respective recesses in one face thereof to accommodate two separate lip members of the flexible blade arrangement and to accommodate said scrubbing arrangement.
Claim 7
Dependent Claim
35 words
A windscreen wiper as claimed in claim 4, in which said conduit includes a longitudinally extending passage defined by the side and cross members of the carrier and the cross member of the blade assembly.
Claim 8
Dependent Claim
44 words
A windscreen wiper as claimed in claim 5, in which said conduit means includes a longitudinally extending passage defined by the side and cross members of the carrier and a top member accommodated at its edges in inwardly facing grooves in said side members.
Claim 9
Dependent Claim
21 words
A windscreen wiper as claimed in claim 6, in which passages are provided through said cross member bounding said hollow space.
Claim 10
Dependent Claim
15 words
A windscreen wiper as claimed in claim 7, in which said top member is rigid.
Claim 11
Dependent Claim
15 words
A windscreen wiper as claimed in claim 7, in which said top member is resilient.
Claim 12
Dependent Claim
31 words
A windscreen wiper as claimed in claim 1, in which said scrubbing arrangement is a brush extending along substantially the entire length of the space and having a continuous flexible spine.
Claim 13
Dependent Claim
31 words
A windscreen wiper as claimed in claim 1, in which said scrubbing arrangement is a continuous flexible plastic material bearing member adapted to bear the main loads exerted on the wiper.
Claim 14
Dependent Claim
64 words
A windscreen wiper as claimed in claim 12, in which the bearing member is provided with a concave depression in its face engaging the windscreen, such that it makes contact therewith along two spaced lines, and the outside faces of the member in the vicinity of the face are inclined outwardly such that the edges between the base and the faces have knife-edge configurations.
Claim 15
Dependent Claim
26 words
A windscreen wiper as claimed in claim 13, in which passage means for cleaning fluid extend through said bearing member and terminate in said concave depression.
Claim 16
Dependent Claim
35 words
A windscreen wiper as claimed in claim 6, in which said longitudinally extending passage is divided into two parts by a transversely extending partition, whereby each part may receive a separate supply of cleaning fluid.
Claim 17
Dependent Claim
28 words
A windscreen wiper as claimed in claim 1, in which an end cap carried by the carrier has cleaning fluid connection means formed therein leading to the conduit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |