EP0054368A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in or relating to a smoothing pad
Assignee: Thomas Hunter Ltd
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Filing: 1981-11-26
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Granted: —
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Expires: 2001-11-26
Abstract
Abstract A smoothing pad having a working surface (1, 33) formed with a plurality of depressions (6, 12, 30) for indicating wear of the working surface of the pad. Each depression preferably diverges towards the working surface of the pad so that the dimension of each depression in a direction transverse to its depth will diminish as the working surface wears. Each depression constitutes a reservoir for an abrasive slurry used with the pad and a gradual transition is preferably defined between each depression (30) and the working surface whereby, in use, the abrasive slurry (S") will be encouraged to flow from each depression on to the working surface.
Inventors
- 👤 Cyril Kenneth Edwards
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 04:30
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A smoothing pad having a working surface formed with at least one depression for indicating wear of the working surface. Characterised in that the depression (6, 12, 30) is formed so that the dimension of the depression in a direction transverse to its depth will change as the working surface (1) wears.
Claim 2
Dependent Claim
52 words
A smoothing pad having a working surface formed with at least one depression for indicating wear of the working surface. Characterised in that the depression (6, 12, 30) is formed so that the dimension of the depression in a direction transverse to its depth will change as the working surface (1) wears.
Claim 3
Dependent Claim
37 words
.A smoothing pad according to claim 1 characterised in that the depression (6, 12, 30) diverges towards the working surface (1, 33) so that the said dimension of the depression will diminish as the working surface wears.
Claim 4
Dependent Claim
24 words
A smoothing pad according to claims 1 or 2 characterised in that the depression (6, 12, 30) constitutes a reservoir for an abrasive slurry.
Claim 5
Dependent Claim
49 words
A smoothing pad according to claim 3 characterised in that there is a gradual transition (32, 32a) between the wear indicator depression (30) and the working surface (33) whereby, in use, the abrasive slurry S" will be encouraged to flow from the depression on to the working surface (33).
Claim 6
Dependent Claim
22 words
A smoothing pad according to any preceeding claim characterised in that the width of the depression changes as the working surface wears.
Claim 7
Dependent Claim
65 words
A smoothing pad according to any preceding claim characterised in that a plurality of depressions (6) in the form of wear indicator grooves are formed in the working surface (1), the wear indicator grooves being arranged so that wear indicator grooves (6A, 6B) in one portion of the working surface are transverse to wear indicator grooves (6C, 6D) in another portion of the working surface.
Claim 8
Dependent Claim
42 words
A smoothing pad according to claim 6 characterised in that a wear indicator groove (6A) in one porition of the working surface is connected by a further groove (10) to a wear indicator groove (6B) in another portion of the working surface.
Claim 9
Dependent Claim
17 words
A.smoothing pad according to any preceding claim characterised in that depression (6) is of trapezoidal cross section.
Claim 10
Dependent Claim
22 words
A smoothing pad according to any of clams 1 to 7 characterised in that the depression (6) is of V-shaped cross section.
Claim 11
Dependent Claim
22 words
A smoothing pad according to any of clams 1 to 7 characterised in that the depression (6) is of V-shaped cross section.
Claim 12
Dependent Claim
27 words
A smoothing pad according to any of claims 1 to 5 characterised in that a multiplicity of frusto-conical depressions (12) is formed in the working surface (1).
Claim 13
Dependent Claim
23 words
A smoothing pad according to claim 10 characterised in that the frusto-conical depressions (12) are interconnected by grooves (15) in the working surface.
Claim 14
Dependent Claim
42 words
A smoothing pad according to any preceding claim characterised in that the depression (6; 12; 30) has, in cross section, side walls inclined so that the rate of change in said dimension will be greater than the rate of working surface wear.
References Cited (Backward Citations)
No citation records indexed.
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