EP0126641A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements relating to guard arrangements for portable rotary cutters
Assignee: Kango Ltd
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Filing: 1984-05-18
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Granted: —
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Expires: 2004-05-18
Abstract
Abstract A guard arrangement for a portable rotary cutter is provided which enables the position of a guard plate (12) for the cutter blades to be readily adjustably positioned in the most convenient position about the axis of rotation of the blade. In one arrangement, the hub of the guard plate is secured to an inner ring (15) the outer surface of which has notches (26) over half of its circumferential extent. Inner ring (15) is encircled by a slightly oval outer ring (20) guided for diametral movement. Outer ring (20) has internal detents (26) and is spring loaded to urge the detents in engagement with the notches. Outer ring (20) has an arm (22) constituting a handle for disengaging the detents from the notches to allow the guard plate and inner ring to be rotated into another position. In alternative constructions, equivalents of the detent and notches may be formed in axial faces of components of the guard arrangement, a releasable axial clamping device being provided to permit adjustment of the rotational position of the guard plate.
Inventors
- 👤 Leslie Walter Ford
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 00:21
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/22; B26B; B26B29/00; B27; B27G; B27G19/00; B27G19/02; B27G19/04; F; F16; F16P; F16P1/00; F16P1/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A guard arrangement for a portable rotary cutter, comprising a mounting member adapted to be secured to the casing of the cutter about the output shaft of the cutter, and a guard plate having a central portion extending about the axis of the output shaft and an outer portion extending part way about said axis, characterised in that said guard plate is mounted by the central portion thereof on said mounting member for rotational movement relative thereto about the axis of the output shaft, and in that releasable means is provided for fixing the guard plate in selected rotational positions relative to the mounting member.
Claim 2
Dependent Claim
105 words
A guard arrangement for a portable rotary cutter, comprising a mounting member adapted to be secured to the casing of the cutter about the output shaft of the cutter, and a guard plate having a central portion extending about the axis of the output shaft and an outer portion extending part way about said axis, characterised in that said guard plate is mounted by the central portion thereof on said mounting member for rotational movement relative thereto about the axis of the output shaft, and in that releasable means is provided for fixing the guard plate in selected rotational positions relative to the mounting member.
Claim 3
Dependent Claim
22 words
A guard arrangement as claimed in claim 1, characterised in that said means is releasable against the action of biasing spring means.
Claim 4
Dependent Claim
83 words
A guard arrangement as claimed in claim 2, characterised in that the releasable means for fixing the guard plate relative to the fixed member comprises a detent or detents and a set of notches spaced about said axis, said detent or detents and said set of notches being provided one on the fixed member and the other on the guard plate for movement into and out of engagement with each other and being biased by said spring means into engagement with each other.
Claim 5
Dependent Claim
40 words
A guard arrangement as claimed in claim 3, characterised in that the detent is provided on a ring which encircles the axis of said output shaft and which is mounted on the fixed member for guided diametral movement relative thereto.
Claim 6
Dependent Claim
49 words
A guard arrangement as claimed in claim 4, characterised in that the ring has a radially outwardly extending handle extending in alignment with the direction of said guided diametral movement by which handle the ring can be operated to disengage the detent or detents from the set of notches.
Claim 7
Dependent Claim
132 words
A guard arrangement as claimed in claim I or claim 2, characterised in that the guard plate is disposed axially between a fixing clamp plate and a cam device which is selectively operable into a first position to move the guard plate into axial abutment with the clamp plate and into a second position to permit the guard plate to move axially away from the clamp plate, a detent and a set of notches spaced apart about said axis being provided one on the guard plate and the other on the clamp plate such that the detent can be engaged in any one of the notches when the cam device is in said second position and can be secured in such engagement by operation of the cam device into said first position.
Claim 8
Dependent Claim
58 words
A guard arrangement as claimed in claim 6, wherein said cam device comprises one or more circumferentially-extending axially-facing ramp surfaces on said mounting member, each of which surfaces is positioned for engagement by a fixed surface such that rotation of the mounting member about said axis causes the mounting member to move axially relative to said fixed surface.
Claim 9
Dependent Claim
22 words
A guard arrangement as claimed in claim 7, wherein said fixed surface or surfaces are provided by the casing of the tool.
Claim 10
Dependent Claim
39 words
A guard arrangement as claimed in claim 8, wherein the casing of the tool provides a matching ramp surface constituting said fixed surface and corresponding to the ramp surface or each of the ramp surfaces on the mounting ring.
References Cited (Backward Citations)
No citation records indexed.
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