Abstract:
An improved method of shrink fit assembly of two components increases resistance to torsional and/or axial loads without the need for a separate key element. Use of a roughened surface, in combination with a softer deformable material, creates a keyed type interaction at the contact areas of the shrink fitted components. One of the shrink fitted components may comprise the softer material, though intermediate layers and sleeves can be used.
Abstract:
Comminution apparatus is described which is tailored for the processing of green, soft, and fibrous waste. Inner and outer comminution drums bear projecting macerating features which can progressively interact to provide a shearing action on material on waste within the outer comminution drum. Screening apertures on the outer comminution drum allow for the exit of comminuted material.
Abstract:
The present invention relates to hogger and reducing apparatus and considers issues associated with fibrous and other materials clogging screening apertures (407). The use of a paddle arrangement (401) having an open framework is discussed, this arrangement (401) rotating relative to the screening apertures (407) provided on a drum (40). Either or both the paddle arrangement (401) and drum (40) may rotate, the resultant action increasing agitation of raw material (being reduced in size by a reducing means) in the vicinity of the screening apertures (407) and also providing a wiping type effect to help clear material from within the apertures (407). Use of paddle arrangements in inclined and vertical type hoggers is discussed.
Abstract:
The present invention relates to hogging, sometimes known as reducing, apparatus for reducing wood waste into hog fuel, though some embodiments may also be used for reducing other materials including demolition timber, demolition masonry, mild steel scrap (thin sections), soft metal scrap, recycled cans, recycled glass, recycled plastic, soft rocks, occasionally hard rocks, recycled roading and asphalt, old tyres, and certain green garden waste. The apparatus comprises a drum (40) inclined to the horizontal and into which raw material can be fed at its upper end. Rotation of the drum (40) assists driving raw material towards reducing means (45) positioned at an angle near its (40) lower end. Screening apertures (41) allow sufficiently comminuted material to pass therethrough for removal. Optional features include internal agitators (60) for improving processing and screening, assisted drying of raw material by motor exhaust (71), and initial pre-screening of foreign material.
Abstract:
A hitch assembly (1) commonly used between an accessory (such as a front end bucket) and a tractor or prime mover (such as a skid steer loader). The hitch assembly (1) includes a bearing arrangement, partly integral with one of two frame members (2, 3), which allows the two frame members (2,3) to rotate relative to one another. The two frame members (2, 3) are attached to the tractor via adaptor (61) and the rear of the accessory (eg bucket 60). The bearing portion thus enables rotation of the accessory (60) about an axis substantially parallel to the longitudinal axis of the tractor. Automatic control in conjunction with laser type levelling systems or GPS contouring of sloped surfaces is also possible.
Abstract:
The invention relates to a replaceable tooth arrangement for use in grinding discs such as used in wood hoggers and comminuting equipment. A preferred tooth arrangement comprises two end to end adjacent tip portions (1), or a tip portion end to end with a complementary base portion (5). The contacting faces (4, 6) of the portions are preferably tapered so that tightening together creates a resultant outward movement which tightens them against the walls of a retaining aperture (54) in a disc (50) or disc section. Alternatively or additionally a connection element (12) interacts with a wedge keeper which causes a similar outward component in the keeper (15) and tip portion (1), tightening them against the walls of a retaining aperture, as the connection element is tightened.
Abstract:
The present invention relates to a rotary flow divider, particularly for use in hydraulic circuits for applications such as dividing the output of a hydraulic pump between several differently (non-equally) loaded devices. The apparatus comprises a central distributor which channels fluid from the pump to outlet ports, and an outer housing with a plurality of distribution ports (associated with different loaded devices). Repeated alignment and closure of outlet and distribution ports in a sequential type manner distributes fluid to the different devices. Such port alignment and closure is achieved by movement of the distributor and housing relative to each other in a rotational and/or linear manner, though an intermediary moving shutter device or sleeve may be used instead. Such an intermediary shutter device or sleeve may also be configured as a repositionable control sleeve to modify the nature of distribution of fluid when it is secured in different positions.