Modular saddle tree

Abstract

A modular saddle tree 101 comprising an assembly of pre-fabricated parts including a seat portion component 103 and a head portion component 105, which are secured relative to one another by elongate

Description

FIELD OF THE INVENTION The present invention relates to the field of saddle trees for use in the manufacture of saddles for horses and, in particular, to a modular synthetic saddle tree, to components thereof, a method of manufacture of a saddle tree and to methods of constructing saddles using the modular synthetic saddle tree. BACKGROUND OF THE INVENTION Saddle trees are used in the manufacture of saddles to provide strength and structural support and providing a core or base about which a saddle may be built. A conventional saddle tree for a riding saddle comprises a frame formed from wooden parts, including two generally parallel (and symmetrically disposed) longitudinal side bars spaced apart to be disposed either side of a horse’s spine and these side bars are linked together at the fore by a head portion that forms the headplate (or forks) and at the rear by a cantie. Typically, metal supports of sprung steel are provided, extending front to back, and steel gullet bars may also be provided to provide rigidity at the headplate or pommel of the resulting saddle. Traditional saddle manufacture involves the saddle tree maker making use of the flexibility and tension in the saddle tree to shape and form the saddle, starting with applying webbing, under tension, to provide the form of the saddle within the confines of the saddle tree shape. The webbed saddle tree is then lined, appropriately, with rubber or synthetic rubber and / or dense foam components or with wool or foam-stuffed panels, which are further shaped for horse and rider fit and rider preference and to provide the base upon which the saddle outer (typically of leather) may be built. The saddle needs to be made to fit the horse, in the first instance, and to fit the rider. This involves making the saddle to fit the shape and dimensions of the horse and having account for the shape, preferences, riding style and purpose of the rider. While small adjustments can be made for fit and comfort at fitting, the key features of shape and configuration for both horse and rider fit are at the manufacturing stage and derive from the shape and configuration of the saddle tree, which is then built upon. For example, the saddle tree shape defines the gullet bar angle that can be achieved, the length of the saddle, the distance between seating position and the pommel of the saddle, the width, length and angle of the seat, the longitudinal profile (width profile) of the saddle, the angle, extent and position of the cantie and the position of stirrup bars which are fitted to the saddle tree. The saddle tree is thus critical to the final fit of the saddle for both horse and rider. It is therefore necessary for a saddle tree maker to have access to a wide range of shapes and configurations of saddles, whether by holding a large inventory of saddle trees or ordering to fit. A good quality bespoke saddle therefore tends to be expensive and / or require a long wait. Several attempts have been made to commoditise and streamline saddle manufacture, including provision of synthetic and modular saddle trees, but these have tended to be at the expense of quality and bespoke design. For example, EP-A-2275382 describes a saddle tree that is characterised by having downward hanging wall or points at the fore of the saddle tree that are adjustable by pivoting about a pivot point to increase the width of the headplate or fore area. It also describes that a saddle tree can be built from modular components being the cantie, the connecting part and the headplate. In one embodiment, the connecting part includes a seat area and an integral basic part of a saddle head and upper and lower parts may be releasably coupled with the integral basic part to define the saddle head and a steel head iron may be provided to provide robustness and strength to the saddle head, which steel head iron is bendable about a pivot line corresponding to the points. No information is provided as to how the component parts are formed and joined. Furthermore, the connecting part is described as a single piece which defines the seat and the basic part of the saddle tree, which do not accommodate modular variations in shape of the saddle tree for fit for a horse or rider. US7178318 is directed to a saddle tree that comprises a flexible head plate, a cantie and a connecting portion. The flexible head plate is formed by way of a central rigid headplate and an assembly of overlapping flexible and resilient layers of different length to define points of flexibility whereby the saddle tree maybe fitted to horse of different sizes. The headplate assembly is secured to the connecting portion and a cantie also secured to the connecting portion. The connecting portion is made of leather or other flexible and rugged material. This saddle tree assembly is referred to as a ‘progressive flex saddle tree’. There is no modularity provided in the ‘connecting portion’ which amounts to the entirety of the saddle tree from cantie to headplate. US7360349 describes a saddle tree having cooperating components to enhance fit to a horse. In particular, the saddle tree has a carbon fibre tree composed of two carbon fibre side panels provided with a hinged bridge at the pommel end and a fabric connector or bridge at the cantie end and an overlayed carbon fibre seat plate which secures to the bridge of the lower cooperating side panels via a central block and to the side panels via spacers, depending upon the relative angle of the side panels in order to fit the particular horse. The saddle tree of US7360349 is not readily adaptable for use in manufacturing a saddle by conventional means and there is no disclosure in length and shape of the seat and length of the saddle tree. The flexibility for fit in this saddle tree is provided solely by the pivoting or hinged side panels. US9315374 describes a saddle tree consisting of a front saddle tree (corresponding to the pummel) and a frame of two parallel bars with a rear saddle tree or cantie connecting portion, in which the front saddle tree is configured to be adjustable (without disassembly) to fit different shaped horses. The front saddle tree comprises an inner and an outer inverted u-shaped elements, the arms of which inner element is attached to the arms of the outer element leaving a gap between the elements at their apexes. A threaded rod is fixed to the inner element and extends through an aperture of the outer element whereby a nut on the rod can be tightened against the outer element forcing the apexes together or allowing them to separate. This causes the arms of the inner and outer elements to splay as the nut is rotated one way and pinch as the nut is rotated the other, thus providing a different mounting angle for the front saddle tree to allow its fit to a range of horse size. There is no description of any modularity in US9315374. WO-A-2008 / 030103 is directed to a saddle that is configured with at least three longitudinally disposed component parts, the fore and rear parts rotatably hingedly mounted (about a vertical axis) onto the middle part along a central axis whereby the fore and rear parts will articulate relative to the middle part as the horse moves. Thus, the saddle will conform to the back of the animal as its moves while providing stability and a continuous surface against the back of the animal. The foremost part is said to be adjustable to allow the saddle to fit different widths of animal. The saddle arrangement of WO-A-2008 / 030103 is not consistent with conventional saddle manufacture techniques and could not readily be substituted into current processes. The present inventors have identified a solution by providing a modular saddle tree which address the aforementioned shortcomings. PROBLEM TO BE SOLVED BY THE INVENTION It is an object of the invention to provide an improved, modular saddle tree. It is an object of the invention to enable saddle manufactures to have access to a broad range of saddle tree shapes, configurations and designs without the need to hold large inventories of saddle trees. It is an object of the invention to provide the option of bespoke saddle fit and manufacture without the usual expense and / or delay associated with such high quality bespoke saddlery. It is an object of the invention to provide a synthetic saddle tree which meets the support and flexibility requirements of a saddle tree and can be adopted in the traditional methods of saddle manufacture. SUMMARY OF THE INVENTION In accordance with a first aspect of the invention, there is provided a modular saddle tree comprising an assembly of a plurality of prefabricated component parts, the assembly comprising at least: a seat portion component; and a head portion component; wherein the seat and head portion components are secured relative to one another by elongate longitudinal members and / or by cooperating and / or interlocking projecting elements, whereby a desired longitudinal rigidity is provided to the saddle tree. In a second aspect of the invention, there is provided a modular saddle tree comprising an assembly of a plurality of prefabricated component parts, the assembly comprising at least: a seat portion component; and a head portion component; wherein: the saddle tree comprises a reinforced peripheral portion extending from the head portion component to the seat portion component to provide a desired longitudinal rigidity and transfer load across the saddle tree; and / or the seat and head portion components are formed with a plurality of reinforcing vanes or ribs having a largely longitudinal component of orientation, which serve to increase the longitudinal rigidity of the part of the saddle tree where they are disposed. In a third aspect of the invention, there is provided a kit of parts for use in assembly of the modular saddle trees defined in the first and second aspects above. In a fourth aspect of the invention, there is provided a method of manufacturing a saddle tree for use in the manufacture of a saddle bespoke to fit a horse or horse size and / or rider preference, the method comprising: selecting a seat portion component from a range of seat portion components according to desired criteria; selecting a head portion component from a range of head portion components according to desired criteria; selecting a gullet bar from a range of gullet bars having various gullet bar angles and affixing the same to the head portion component; and connecting the head portion component to the seat portion component, optionally by selecting a connecting mid-portion component from a range of midportion components according to desired criteria and affixing the mid-portion component to each of the seat portion component and the head portion component, thereby forming a saddle tree for use in manufacturing a saddle according to a combination of desired criteria. Optionally, this can enable production of a bespoke saddle tree, for use in manufacture of a bespoke saddle, or could enable production at scale of a range of saddle tree designs. In a fifth aspect of the invention, there is provided a lightweight saddle tree of injection-moulded plastic, the saddle tree comprising a seat portion and a head portion, wherein the saddle tree comprises a reinforced peripheral portion extending from the head portion to the seat portion to provide a desired longitudinal rigidity and transfer load across the saddle tree; and / or the seat and head portions are formed with a plurality of reinforcing vanes or ribs having a largely longitudinal component of orientation, which serve to increase the longitudinal rigidity of the part of the saddle tree where they are disposed. In a sixth aspect of the invention, there is provide a modular saddle tree comprising an assembly of a plurality of prefabricated component parts, the assembly comprising at least: a seat portion component selected to have a desired seat portion length, width and configuration; a cantie portion component selected to have a desired width and cantie angle and extent of projection, the cantie portion being affixed to a rear part of the seat portion; a head portion component configured to receive a gullet bar of a range of curvatures; and a gullet bar fixed to the head portion component; wherein the components parts may be selected according to horse-fit and rider preference requirements to provide a saddle tree onto which to build a saddle (that may optionally be bespoke to horse and / or rider). In a seventh aspect of the invention, there is provided a kit of parts for use in assembly of the modular saddle trees defined in the sixth aspect above. In an eighth aspect of the invention, there is provided a method of manufacturing a saddle tree for use in the manufacture of a saddle to fit a horse or horse size and / or rider preference, the method comprising: selecting a seat portion component from a range of seat portion components having one or more different seat portion lengths, widths and configurations according to desired criteria; selecting a cantie portion component from a range of cantie portion components one or more of various widths and cantie angles and extents of projection according to desired criteria and affixing the same to the selected seat portion component; selecting a head portion component; selecting a gullet bar from a range of gullet bars having various degrees of curvature or gullet bar angles and affixing the same to the head portion component; and connecting the head portion component to the seat portion component, optionally by selecting a connecting mid-portion component from a range of midportion components of desired longitudinal extent and transverse rigidity according to desired criteria and affixing the mid-portion component to each of the seat portion component and the head portion component, thereby forming a saddle tree for use in manufacturing a saddle according to a combination of desired criteria. In a ninth aspect of the invention, there is provided an adjustable head portion for a saddle tree, which adjustable head portion comprises a headplate configured for receiving, adapting its shape to and mounting to a gullet bar of any of a range of gullet bar angles. ADVANTAGES OF THE INVENTION The system, components and method of the invention provide an improved saddle tree for use in the manufacture of saddles, which enables saddle manufacture (especially bespoke saddle manufacture) consistently and with desired properties in a modular manner and enabling a smaller inventory to be held by saddle tree or saddle makers. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1A is a top perspective view of a modular saddle tree of one embodiment of the invention; Figure IB is a top perspective view of the modular saddle tree of Figure 1A with the gullet bar and fixings exploded; Figure IC is a top perspective view of the modular saddle tree of Figure 1A less the gullet bar and fixings with the cantie exploded; Figure ID is a top perspective view of the modular saddle tree of Figure 1A less the gullet bar and fixings and the cantie and showing the seat portion component exploded; Figure IE is a plan view of a separated seat portion and connecting mid-portion of a modular saddle tree of Figure 1A; Figure IF is a top perspective view of the modular saddle tree of Figure 1A absent the gullet bar and fixings, the cantie and the seat portion component and showing the connecting mid-portion component exploded; Figure 1G is a plan view of a separated connecting mid-portion and head portion of a modular saddle tree of Figure 1 A; Figure 2 is a perspective bottom view of a portion of the modular saddle tree illustrated in Figure ID; Figure 3 A is a bottom view of a seat portion component of a modular saddle tree illustrated in Figure 1 A; Figure 3B is a bottom view of a connecting mid-portion component of a modular saddle tree illustrated in Figure 1 A; Figure 3C is a bottom view of a head portion component of a modular saddle tree illustrated in Figure 1 A; Figure 4A is a side perspective view of a rig used to determine longitudinal rigidity of a saddle tree; and Figures 4B is a front perspective view of a rig used to determine torsional rigidity of a saddle tree. DETAILED DESCRIPTION OF THE INVENTION The invention concerns, at least in the first and second aspects, a modular saddle tree comprising an assembly of a plurality of prefabricated component parts, being at least a seat portion component and a head portion component. The modular saddle tree may be used as the basis upon which to make a saddle, by traditional or more contemporary means, and provides an opportunity to build a bespoke saddle having desired dimensions for fitting both horse and rider or to establish a manufacturing line capable of rapid production of a wide variety of saddle tree variants, without the need to keep large amounts of stock or to manufacture the saddle tree upon request, and to provide desired characteristics of weight and flexibility that provide a comfortable saddle for horse and rider, while maintaining a robust support. In the first aspect of a modular saddle tree of the invention, the seat and head portion components are secured relative to one another by elongate longitudinal members and / or by cooperating and / or interlocking projecting elements, whereby a desired longitudinal rigidity is provided to the saddle tree. In a second aspect of a modular saddle tree of the invention (and preferred embodiment of the first aspect), the saddle tree comprises a reinforced peripheral portion extending from the head portion component to the seat portion component to provide a desired longitudinal rigidity and transfer load across the saddle tree; and / or the seat and head portion components are formed with a plurality of reinforcing vanes or ribs having a largely longitudinal component of orientation, which serve to increase the longitudinal rigidity of the part of the saddle tree where they are disposed. The modular saddle tree will be described in terms of embodiments that are applicable generally to the first and second aspects of the invention, and other aspects of invention described herein where the context allows. It is generally preferred in the modular saddle tree of the invention that the seat and head portion components are secured relative to one another by elongate longitudinal members, whereby a desired longitudinal rigidity is provided to the saddle tree. As well as providing a degree of longitudinal rigidity, the use of elongate longitudinal members in securing the seat and head portion components together reduces stress on the join, providing a degree of robustness. By elongate longitudinal members, it is meant elongate members that are disposed or configured for disposal generally along the length of the saddle tree (rear to fore). There are various configurations by which the modular saddle tree can be assembled using such elongate longitudinal members. Typically, the seat and head portion components are secured relative to one another by cooperating elongate longitudinal members. For example, the seat and head portion components may be mounted together (e.g. so that the edges of the seat and head portion components abut) by one or more discrete elongate longitudinal members (or other discrete mounting bracket member), optionally received within recesses in an upper surface or more typically a lower surface of the seat and head portion components. Alternatively or additionally, such elongate longitudinal members (or mounting members) may form part of one or other of the seat portion component or the head portion component and preferably be received by corresponding recesses in the other component. Optionally, the elongate longitudinal members may have a full depth, by which it is meant form upper and lower surfaces of the resulting assembled saddle tree and have laterally and longitudinally projecting ribs or flanges and where the elongate longitudinal member are received in channels (extending through the full depth of a receiving member) with partial depth recesses (defining cooperating flanges) corresponding with the lateral ribs / flanges of the elongate member. Preferably, the seat and head portion components are secured relative to one another by cooperating elongate longitudinal members. Preferably, the modular saddle tree comprises a connecting midportion component which is secured to each of the seat portion component and the head portion component and preferably serves to secure the head and seat portion components relative to one another. While the connecting mid-portion component may optionally be unseen (i.e. have no upper surface, acting simply as a bracket), preferably, the connecting mid-portion component has a core element, defining front and back edges abutting corresponding edges of the head and seat portions and defines at least part of an upper surface of the resulting assembled saddle tree. Preferably, the connecting mid-portion component extends the full width of the assembled saddle tree. Preferably, the connecting mid-portion component is secured to the seat portion component and the head portion component longitudinally extending elongate members projecting therefrom (e.g. from the core element) and / or from the seat portion component and / or from the head portion component, which are preferably cooperatively received in corresponding recesses and / or channels in respective other of the connecting mid-portion, head portion and seat portion components. Additionally or alternatively, the mid-portion component is secured to each of the seat portion component and the head portion component by overlapping and cooperating forward and backward projecting features or flanges which form upper and lower parts of that overlapping portion of the saddle tree when assembled. Preferably, a cooperating pair of forward and backward projecting features, one say form the seat portion component (for example an upper forwarding projecting feature) and one from the connecting mid-portion component (for example, a lower rearward projecting feature) cooperate to form a joint in which the terminal edges of the upper and lower projecting features meet edges of the corresponding surfaces of the other component defining a cooperating recess so that when assembled the upper surfaces of the seat portion component and the connecting mid-portion component define a continuous uninterrupted surface, akin to a lap-joint. A similar such lap-joint arrangement may preferably be provided between the head portion component and the connecting mid-portion component. In one embodiment, the elongate members cooperate with recesses and / or channels provided in the respective seat portion, connecting mid-portion and head portion components. In one particular preferred embodiment, the connecting midportion component comprises a core element and projecting therefrom two forward extending elongate members configured to be disposed peripherally, either side of a central longitudinal saddle tree axis, and wherein the head portion component is provided with recesses and / or channels for cooperative engagement with the forward extending elongate members of the connecting mid-portion component. Alternatively, two rearward extending elongate members extending from the head portion component are disposed peripherally, either side of a central longitudinal saddle tree axis, and the connecting mid-portion component is provided with recesses and / or channels for cooperating with the rearward extending elongate members. In another particular, preferred, embodiment, the seat portion component has projecting therefrom two forward extending elongate members configured to be disposed peripherally, either side of a central longitudinal axis, and wherein the connecting mid-portion component is provided with recesses and / or channels for cooperative engagement with the forward extending elongate members of the seat portion component. Alternatively, two rearward extending elongate members extending from the mid-portion component are disposed peripherally, either side of a central longitudinal saddle tree axis, and the seat portion component is provided with recesses and / or channels for cooperating with the rearward extending elongate members. In one embodiment of the assembly, a seat portion component, a connecting mid-portion component and a head portion component are secured together at least by two forward projecting peripherally disposed members on the connecting mid-portion component received in a corresponding recess on the head portion component and by two rearward projecting peripherally disposed members on the connecting mid-portion component received in a corresponding recess on the seat portion component, the connecting mid-portion component preferably forming an H-shaped member. In another, preferred, embodiment of the assembly, a seat portion component, a connecting mid-portion component and a head portion component are secured together at least by two forward projecting peripherally disposed members on the connecting mid-portion component received in a corresponding recess on the head portion component and the at least two forward projecting peripherally disposed members on the seat portion component received in a corresponding recess on the connecting mid-portion component. It is preferred that the projecting elongate longitudinal members and the corresponding recesses provided a significant degree of overlap between the cooperating components. For example, it is preferred that forward extending elongate members of the connecting mid-portion component (or seat portion component, in the absence of a mid-portion component, for example) extend into and overlap with the head portion component by an amount of from one-quarter to three-quarters of the longitudinal extent of the head portion component (the degree of overlap of the head portion component with the mid-portion component, or seat portion component, being of that nature also when the projection is from the head portion into recesses formed in the connecting mid-portion and / or seat portion component). The overlap between the head portion component and the connecting mid-portion component (or, in its absence, the seat portion component) may be an area of at least 10 cm2, preferably at least 25 cm2 and more preferably at least 40 cm2, still more preferably at least 50 cm2 and optionally at least 75 cm2, and optionally up to 150 cm2. Furthermore, for example, it is preferred that elongate longitudinal members that work to secure the connecting mid-portion component (or head portion component, in the absence of a mid-portion component, for example) and the seat portion component overlap by an amount of from one-quarter to three-quarters of the longitudinal extent of the seat portion component (the degree of overlap of the seat portion component with the midportion component, or head portion component, being of that nature whether the projection is from the seat portion into recesses formed in the connecting midportion and / or head portion component or vice versa). The overlap between the seat portion component and the connecting mid-portion component (or, in its absence, the head portion component) may be an area of at least 10 cm2, preferably at least 25 cm2 and more preferably at least 40 cm2, still more preferably at least 50 cm2 and optionally at least 75 cm2, and typically up to 150 cm2. This extensive overlap of projecting members of the respective components serves to ensure the joint is robust and serves to stiffen the saddle tree along the areas of overlap. Preferably, upper and lower projecting features (or members) from adjacent components of the modular saddle tree, which cooperate to form an overlapping portion and robust joint, comprise any elongate projecting members. Preferably, such upper and lower projecting features extent the full width of the saddle tree. The minimum overlap of such overlapping upper and lower projecting features may, for example be 15 mm, preferably at least 20 mm and optionally at least 25 or 30 mm. The overlapping elements of the respective components of the modular saddle tree may be fixed together by any suitable means, but are preferably fixed by threaded bolts or screws that secure into receiving threads formed in the inner surface of the respective recesses. Preferably, according to any of the aspects or embodiments herein, the saddle tree comprises a reinforced peripheral portion extending from the head portion component to the seat portion component to provide a desired longitudinal rigidity and transfer load along the saddle tree. The reinforced peripheral portion preferably comprises the aforementioned overlapping elongate longitudinal member and cooperating recessed portions of neighbouring components, preferably both of the peripherally disposed elongate longitudinal members connecting the seat portion component to the connecting mid-portion component and the peripherally disposed elongate longitudinal members connecting the head portion component to the connecting mid-portion component, which are preferably longitudinally aligned or generally aligned front to back. The overlapping areas of elongate longitudinal members and cooperating recesses can be said to be reinforced peripheral portions or reinforced zones. Preferably said reinforced peripheral portions are proximal, preferably adjacent or adjoining, front to back, introducing a continuous longitudinal stiffness along the length of the modular saddle tree whereby load can be effectively transferred from flank portions of the head portion component or proximal thereto along the length of the reinforced elongate mid-head and reinforced elongate seat-mid peripheral portions and therefore along the outside edge of the saddle tree. Thereby load may be spread along the outside edge of the saddle tree. The reinforced peripheral portion extending from the head portion component to the seat portion component to provide a desired degree of stiffness and to facilitate load transfer may be of any suitable width. Preferably, the reinforced peripheral portion is from the outer edge of the saddle tree or proximal thereto and has a width of at least 2 cm, preferably from 3 to 5 cm along at least two-thirds of its length. Preferably, according to any of the aspects or embodiments herein, the saddle tree comprises at least seat and head portion components (and optionally a connecting mid-portion component) that are formed with a plurality of reinforcing vanes or ribs having a largely longitudinal component of orientation, which serve to increase the longitudinal rigidity of the part of the saddle tree where they are disposed. In one embodiment, it is these areas of reinforcing vanes or ribs that serve to establish the reinforced peripheral portion extending from the head portion component to the seat portion component to provide the desired longitudinal rigidity and transfer load along the saddle tree. In one embodiment, the substantially longitudinally orientated reinforcing vanes are disposed primarily to the rear of the seat portion component and to the fore of the head portion component. Optionally, the saddle tree comprises a medial portion which is characterized by having a plurality of substantially transverse orientated reinforcing vanes, the medial portion optionally comprising a fore portion of the seat portion component, a rear portion of the head portion component and / or a connecting mid-portion component. The head portion component preferably comprises a headplate defining an arcuate form at the foremost part of the head portion, straight or curved opposing sides leading to two opposing peripheral flank portions, typically flared outward relative to the sides of the headplate. The headplate is typically configured to receive and is mounted in relation to a gullet bar, being a rigid arcuate bar member typically having an arcuate central portion of defined curvature and two opposing side bar portions disposed at a pre-defined angle and opposing peripheral flank members, flared outward and cooperating with the peripheral flank portions of the headplate. The shape and angle of the gullet bar (and the headplate) are typically selected to fit a particular horse. The gullet bar is typically secured to the underside of the headplate by any suitable fixing means. As used herein, the term ‘headplate’ is that fore portion of the head portion of a saddle tree that, as mentioned above, is configured to receive and is mounted in relation to a gullet bar, and defines an arcuate central portion with opposing side bar portions extending downwardly therefrom. The headplate is that part of the saddle tree upon which a pommel is formed on a saddle. The headplate may also be referred to as the forks. The gullet bar is a rigid element and formed of any suitable rigid material, in principle, although typically of metal such as steel. The head portion, with gullet bar in position in situ with the headplate, preferably defines a headplate or gullet bar angle of 70 to 120°, preferably 75 to 110°. For example, there may be provided multiple gullet bars from which to select a gullet bar of different angles (and optionally having a range of arm lengths), such as 75°, 85°, 95°, 100°, 110°. Similarly, there may be provided a range of head portion components of different headplate angles, for receiving a gullet bar, the headplate angle being in the range of 70 to 120°, preferably 75 to 110°. For example, there may be provided multiple head portion components from which to select a headplate defining a gullet bar receiving angle of 75°, 85°, 95°, 100° or 110°. Preferably, however, the head portion is configured to have some flexibility in its headplate whereby the angle can be adjusted across a range of angles in order to fix to a range of gullet bar angles and sizes. For example, the head portion may be configured to have a headplate that can flex to receive a gullet bar across the full range of available gullet bars (e.g. 70 to 110°) or the head portion may be selected from say two head portion components, each configured to flex across at least part of the range of angles of gullet bars, e.g. one may flex from 70 to 95° while another may flex from 85 to 110°. Stirrup bars are preferably provided on the head portion component, on each side of the head portion, preferably mounted at or proximal to the flank portion and a peripheral edge of the head portion. Ideally, the stirrup bars will be mounted and fixed in at least two locations for robustness. The stirrup bars are often the point of greatest load on the saddle and this is transferred to the horse via the areas proximal to the stirrup bars and notably the flank portions mentioned above. Thus, load transfer is desirable from the flank portions longitudinally along the outer sides of the saddle tree, to spread the load on the stirrup bars more evenly along the points of contact of the saddle. The aforementioned longitudinal stiffness and, in particular, longitudinally aligned elongate stiffening portions (members) that are provided along the peripheral edges of the saddle tree serve to achieve this. The stirrup bars are typically formed of a rigid and strong material and are typically stainless steel, brass, aluminium bronze or similar. Preferably, the modular saddle tree further comprises a cantie portion provided for by a cantie component. The cantie component selected to have a desired width and cantie angle and extent of projection, the cantie portion being affixed to a rear part of the seat portion. This may be selected to suit riding style, purpose and fit. The cantie may be mounted to a rear edge of the seat portion component (with appropriate fixings, e.g. fixing screws that extend through cantie mounting apertures recessed along the rear edge of the seat portion component to fix into a lower flange of the cantie component. The cantie is typically formed of a more rigid material than the seat portion. Suitably, the cantie may be formed of an injection-moulded plastic (optionally a stiffened or reinforced plastic) and may incorporate a series of ribs or vanes for strength (e.g. radiating from the fixing locations of the cantie) or the cantie may be made of plywood. The saddle tree may further comprise points, which may be mounted to a fore part of the head portion component. The points may be formed of any suitable material. For example, the points may be synthetic (e.g. moulded or injection-moulded plastic) but may alternatively be of wood or a composite wood material. The saddle tree should preferably be lightweight, have sufficient longitudinal and torsional rigidity (i.e. to provide a desired flexibility for both working and to move with the resulting saddle and the horse while sufficient rigidity to maintain its form, maintain balance and support and enable effective load transfer along the length of the saddle), be readily manufacturable and be workable (e.g. to attach fixings, to drill) and to be robust to handling. The saddle tree or components thereof may be formed of any suitable material which provide the desired properties of rigidity, support and workability. Preferably, the saddle tree or components thereof, especially the seat portion component, the head portion and any connecting mid-portion component (which may be formed of the same or different materials) are formed of a plastic material and more preferably are injection-moulded. Preferably, the saddle tree or components thereof, independently, are formed of a plastic comprising or formed from a polymer material (a first polymer) that provides good workability and resilient properties, such as a polypropylene (or a copolymer of polypropylene) that is optionally: blended with a further polymer (a second and further polymers); provided with a filler; and / or provided with a fibre-reinforcing material in order to impart desirable properties, such as dimensional stability, rigidity, resilience and longevity. In particular, polypropylene, while providing desirable properties of resilience, flexibility and workability, has a tendency to creep under consistent load. Therefore, for polypropylene (and any other polymer with advantageous properties but a tendency for such creep) it is desirable to introduce a copolymer, a second polymer in a blend, a fibre reinforcement or a filler to improve the properties. Any suitable second or further polymers may be provided, which typically are provided in an amount of less than 50% of the total polymer weight, preferably no more than 30%. The secondary polymer may be a cross-linked or cross-linkable polymer material that enable enhanced dimensional stability. Any suitable fibre-reinforcing material may be used in the plastic of the saddle tree or component thereof, such as carbon fibres, basalt (or other rock-derived) fibres, polymer fibres or glass fibres. Preferably, a fibre loading in the polymer is selected in order to enhance the primary properties of the first polymer (or polymer blend) to achieve the degree of dimensional stability, robustness and workability that is desired. The fibre-reinforcing material may provide fibres orientated in any suitable fashion, but are preferably randomly orientated. Preferably, especially in the case of glass fibres, the fibre-reinforcing material is provided at a loading of 5 to 50% by weight of the resultant composite plastic material, more preferably 10 to 40% and still more preferably 15 to 30%. Most preferably, the fibre loading is about 20 to 25 % by weight. Any suitable filler may be used, such as calcium carbonate, magnesium carbonate or similar, microspheres or any other suitable filler or a combination thereof. The filler may optionally be provided at a loading of up to 50% by weight of the resultant composite plastic material, more preferably 5 to 40% and still more preferably 10 to 30%. Preferably, where a filler and a fibre-reinforcing material are used, the combined content is no more than 60% by weight of the resultant composite plastic material, preferably no more than 50% by weight, still more preferably at least 5% by weight, still more preferably 10 to 40% and still more preferably 15 to 30%. Most preferably, the fibre / filler loading is about 20 to 25 % by weight of the resultant composite plastic. Preferably, the ratio of fibre to filler, where both are present, is up to 20:1 to 1:1, preferably from 10:1 to 5:1. Additives, such as a plasticizer, a lubricant, a hardener or other suitable additives may be used. In a preferred embodiment, the composite plastic material forming the saddle tree or components thereof comprises (and more preferably substantially consists of) a glass fibre-reinforced polypropylene or similar polymer or blend thereof with a glass fibre loading of 10-30% by weight of the resulting composite material. The components of the saddle tree may be manufactured of different materials in order to impart particular properties, although it is preferred that they have similar dimensional stabilities. For example, it may be desirable for the seat component and / or any connecting mid-portion component to be formed of a material that is stiffer than that of the head portion component, since it may be desired to have more flexibility and resilience in and about the headplate, for example. Further, it may be desired to have a less brittle and more workable material for the head portion component, where certain additional components (such as the stirrup bars and the gullet bar) are affixed. Thus, for example, it may be desirable for the material used for the head portion component to be formed of a composite material containing a fibre-reinforcing material loading of, say from 2 to 10% less, in terms of the total loading of fibre reinforcing material by weight of resultant composite material, than that of the connecting mid-portion or seat components. Any suitable manufacturing technique may be used to make the saddle tree or components therefore, particularly when made of a plastic material or composite plastic material such as that described above and preferably the saddle tree or components thereof are formed by injection moulding. In order to maintain a lightweight saddle tree while maintaining structural integrity and sufficient longitudinal rigidity, the saddle tree is preferably formed of a thin plastic material, in the form of panel-like elements, of from 1.5 to 4 mm thickness, preferably 2 to 3 mm and more preferably up to 2.5 mm thick. Vanes or ribs may be incorporated to provide thicker portions at the vanes or ribs, e.g. up to 10 mm, preferably up to 5 mm, and more preferably from 3.5 to 4.5 mm. Preferably, vanes project from the panel-like elements by an amount of up to 5 mm, preferably 1 to 4 mm, e.g. 2 to 3 mm. Vane width may be from 0.5 to 3 mm, preferably from 1.5 to 2.5 mm. Vanes may be provided to provide structural integrity, especially on larger elements and provide stiffness in particular orientations (e.g. by orientating vanes longitudinally or with a longitudinal component). Ribs may be provided for additional rigidity, especially in the vicinity of fixings or fixing mounts or areas of particular structural stress or load transfer. Ribs may be of a similar degree of projection as that defined for vanes above (e.g. 1 to 4 mm), preferably about 2.5 mm (e.g. 2 to 3 mm). Ribs may be of any suitable width according to requirements (e.g. from 1 to 8 mm wide and optionally 4 to 6 mm). The overall dimensions of the saddle tree may be defined according to the particular requirements of the user (and may be achieved by appropriate selection of component parts), but preferably comprises a length of 40 to 50 cm, more preferably from 42 to 48 cm (measured from the fore edge of the head plate to the rear edge of the cantie). Preferably, the saddle tree comprises a width at the twist (i.e. its narrowest point - typically the mid-point, e.g. across the mid-portion, defined by the connecting mid-portion component) of 110 to 160 mm, preferably 120 to 150 mm. For example, component parts may be selected which provide a twist width of 120 mm, 125 mm, 130 mm, 140 mm and 150 mm (or any combination of choice). Longitudinal stiffness may be provided, as discussed above, by provision of a reinforced peripheral portion and / or longitudinally disposed elongate members, which themselves may be reinforced. Reinforcement may be provided simply by greater thickness of material in the peripheral portion or elongate members, or by providing a reinforcing insert (e.g. a metal or plastic insert element that can be fixed onto the peripheral portion or elongate members), by providing ribs or vanes as described above at the peripheral portion or elongate members, preferably with a larger component of longitudinal orientation, or by provision of a reinforcing panel member. A reinforcing panel member, for example, may be a further discrete, typically plastic injection-moulded, element of the same or different material to the saddle tree components (e.g. it may be formed of a stiffer material) which is typically thin and light weight and optionally provided with ribs or vanes (e.g. on an insider thereof) for stiffening in the desired orientation and which is configured, with the saddle tree component, for cooperation. Typically, the reinforcing panel member may be fixed to the saddle tree component with a plurality of fixings (e.g. screws or threaded bolts via aperture in the panel members and threaded apertures in the saddle tree component). For example, in a preferred embodiment, the seat component comprises a reinforcing panel member on each peripheral portion thereof, preferably elongate from proximal to the rear edge forward (e.g. to a forward projecting elongate member or encompassing a forward projecting elongate member). Furthermore, longitudinal stiffness can be provided by the provision of longitudinally disposed vanes or ribs (or vanes or ribs having a longitudinal component and preferably having a larger component of their orientation being longitudinal). For example, larger portions of panel elements of the saddle tree or components thereof may be provided with vanes to improve their integrity and longitudinal stiffness. For example, the central and rear portion of a seat portion component may be provided with a plurality of vanes with a generally longitudinal orientation (e.g. with a separation of 1 to 4 cm). Similarly, the head portion from the rear edge thereof to the headplate, typically about the central portion, may be provided with vanes (especially toward the fore or headplate) which are preferably separated by 1 to 4 cm, to provide longitudinal stiffness and structural integrity and preferably are flared from rear to fore to allow some flexibility of the headplate about its longitudinal axis. Preferably, the saddle tree of the invention has a desired degree of torsional stiffness (i.e. relating to twisting about a longitudinal axis of the saddle tree). It is desired to have a little flexibility to facilitate some degree of movement of the saddle tree (and the resulting saddle) with the horse as it moves, while providing a desirable degree of support for the saddle and for the rider. Torsional stiffness may be achieved, for example, by peripheral and more particularly bridged peripheral stiffening or reinforcement. In particular, it is preferred that a degree of torsional stiffness is provided by a combination of peripheral reinforcement portions and / or longitudinal elongate members that are peripherally disposed on the saddle tree in combination with lateral or transverse reinforced portions, linking the peripheral reinforcement portions to form a box or rectangular arrangement of reinforcement. Preferably, there are three lateral reinforcement portions, to provide an anchored box or rectangular arrangement of reinforcement. In one particular embodiment, peripheral reinforcement portions (e.g. including longitudinal elongate members) are linked by a mid-portion lateral reinforcement (e.g. provided by a connecting mid-portion component) and a rear lateral reinforcement (e.g. provided by a reinforcing member at a rear edge of the seat portion and / or, preferably a rigid cantie component disposed across the width of the seat portion component at its rear edge). This combination, in addition (optionally) to a degree of rigidity and structural integrity across the body of the saddle tree and, in particular, the seat portion by curved vanes, serves to introduce a degree of torsional stiffness to the saddle tree. Preferably, according to this embodiment, the rectangular arrangement of reinforcement may be further anchored by a further lateral reinforcement member which is preferably provided by the head portion and, preferably, the headplate when secured to a rigid arcuate gullet bar. Thus, the rigid gullet bar anchors, via peripheral reinforced portions (e.g. overlapping portions of the connecting mid-portion component and the head portion), the rectangular reinforcement arrangement of the cantie, mid-portion transverse reinforcement and the peripheral reinforcement connecting them. Thus, additional torsional stiffness can be achieved. Preferably, the saddle tree has a longitudinal rigidity of from 40 to 100 N / mm, preferably from 50 to 90 N / mm and more preferably from 60 to 80 N / mm. Preferably, the saddle tree has a torsional rigidity of from 90 to 150 N / mm, preferably 100 to 140 N / mm and more preferably from 110 to 130 N / mm. Longitudinal and torsional rigidity may be measured by any suitable means. Preferably, however, longitudinal rigidity is measured longitudinally between the flank portions and gullet bar at one end of the saddle tree and proximal to the rear edge of the saddle tree at the other end. Thus, a rig may be used to support the saddle tree at these two points and a weight applied to the middle, or close to the middle, of the saddle tree (e.g. by suspending a weight from a mid-point of the saddle tree, such as a length of a flexible member such as a length of webbing disposed over the saddle tree with weights attached to each end, or to both ends together). The weight may be increased incrementally and the deflection of the saddle tree may be measured. Most typically, the deflection to the saddle tree may be measured by positioning strain gauges against the underside of the saddle tree at various positions along the central axis of the saddle tree, although any suitable means may be used. Preferably, torsional rigidity is determined by securing the head of the saddle tree in a fixed position and measuring the relative deflection at one side of the saddle tree upon the application of a weight to one side of the saddle tree. The rear of the saddle tree may be supported by a pivotally mounted cross member configured to support two peripheral portions of the rear (e.g. seat portion) of the saddle tree. The saddle tree may be clamped in position on the cross member. A weight may then be applied to one side of the saddle tree, e.g. by suspending a weight on one end of the pivotally mounted cross member. Strain gauges associated with each side of the rear portion of the saddle tree (e.g. mounted relative to opposing ends of the pivotally mounted cross member) may be used to measure the deflection caused by the weight. The amount of weight may be increased incrementally and the relative deflection of one side relative to the other side (i.e. the degree of twist or torsional deflection) may be measured and a value of torsional rigidity determined therefrom. There is further provided, as another aspect, a kit of parts for use in assembly of the modular saddle trees defined above. The kit of parts preferably comprises at least a head portion component and a seat portion component and, preferably, a connecting mid-portion component. Preferably, the kit of parts comprises a cantie. Preferably, the kit of parts comprises a gullet bar. Preferably, the kit of parts comprises stirrup bars. In each case, the component parts are selected from a range of that component part providing specific features (e.g. dimensions, angle, extent, and as described above) for that component and which, together with other component parts, provide particular features of the saddle tree that are desired. According to a fourth aspect, a method of manufacturing a saddle tree for use in the manufacture of a saddle specific to a horse or horse size and / or rider preference comprises: selecting a seat portion component from a range of seat portion components according to desired criteria; selecting a head portion component from a range of head portion components according to desired criteria; selecting a gullet bar from a range of gullet bars having various gullet bar angles and affixing the same to the head portion component; and connecting the head portion component to the seat portion component, optionally by selecting a connecting mid-portion component from a range of mid-portion components according to desired criteria and affixing the mid-portion component to each of the seat portion component and the head portion component, thereby forming a saddle tree for use in manufacturing a saddle according to a combination of desired criteria. Preferably, the method further comprises selecting a cantie component from a range of cantie components and connecting the cantie component to the seat portion component. Preferably, the method further comprises selecting stirrup bars from a range of stirrup bars and affixing to the assembled saddle tree, via pre-existing fixings. In a fifth aspect of the invention, as defined above, there is provided a lightweight saddle tree of injection-moulded plastic, the saddle tree comprising a seat portion and a head portion, wherein the saddle tree comprises a reinforced peripheral portion extending from the head portion to the seat portion to provide a desired longitudinal rigidity and transfer load across the saddle tree; and / or the seat and head portions are formed with a plurality of reinforcing vanes or ribs having a largely longitudinal component of orientation, which serve to increase the longitudinal rigidity of the part of the saddle tree where they are disposed. Optionally, the saddle tree may be said to have a mid-portion, which may be the narrowest point of the saddle tree. The saddle tree according to this aspect may be formed of a single injection-moulded part comprising at least the head portion and the seat portion, i.e. extending from a headplate to a rear edge of the seat portion. Optionally, the saddle tree according to this aspect may be provided with a cantie that is an injection-moulded part, which is optionally injection moulded in a single, unitary, part with the head portion and seat portion. Preferably, however, the cantie is provided as a discrete member, preferably of a more rigid material than the saddle tree, such as wood or plywood, and affixed to the rear edge of the seat portion. Preferably, a discrete gullet bar may be provided and fitted to the underside of a headplate of the head portion. In preferred embodiments of this aspect of the invention, the features relating to the reinforced peripheral portion and to reinforcing vanes or ribs and their arrangement may be as described in relation to the earlier aspects of the invention as described above insofar as those features may be applicable to a single moulded saddle tree article comprising at least a seat portion and a head portion. In further preferred embodiments of this aspect of the invention, the saddle tree may comprise any other features described above in relation to earlier aspects of the invention which may be applicable to a single moulded saddle tree article as is apparent by the context (including, but not limited to, features relevant to longitudinal and torsional stiffness, materials of manufacture, methods of manufacture, dimensions and angles). Preferably, the lightweight saddle tree of injection-moulded plastic according to this aspect comprises a reinforced peripheral portion and reinforcing vanes or ribs, in appropriate extents and patterns, such as defined above in relation to earlier aspects. Preferably, the saddle tree (including a cantie, gullet bar and stirrup bars) has a weight in the range of from 1.5 kg to 2.75 kg, preferably from 1.7 kg to 2.5 kg. Preferably, the saddle tree of this aspect of the invention has one or both of a longitudinal rigidity of from 40 to 100 N / mm, preferably from 50 to 90 N / mm and more preferably from 60 to 80 N / mm and a torsional rigidity of from 90 to 150 N / mm, preferably 100 to 140 N / mm and more preferably from 110 to 130 N / mm. In a sixth aspect of the invention defined above, a modular saddle tree comprises an assembly of a plurality of prefabricated component parts, the assembly comprising at least: a seat portion component selected to have a desired seat portion length, width and configuration; a cantie portion component selected to have a desired width and cantie angle and extent of projection, the cantie portion being affixed to a rear part of the seat portion; a head portion component configured to receive a gullet bar of a range of curvatures; and a gullet bar fixed to the head portion component, wherein the components parts may be selected according to horse-fit and rider preference requirements to provide a specific saddle tree onto which to build a saddle. Preferably, the modular saddle tree according to this aspect further comprises one or any combination of: a stirrup bar support mounted to the head portion component to define a desired stirrup bar mounting angle and depth of disposal; a stirrup bar; a gullet bar support for mounting the gullet bar to the head portion component; and point members of a desired length mounted to the head portion component. Preferably, the cantie component is formed of injection-moulded plastic, wood or composite wood material. Preferably, the gullet bar is formed of steel. Preferably, the stirrup bar support members are formed of metal. Preferably, the points are formed of plastic, wood or composite wood material. Preferably, the seat portion component, head portion component and connecting mid-portion component are formed of injection-moulded plastic. More preferably, the seat portion component, head portion component and connecting mid-portion component are mounted together by way of cooperating flange elements or overlapping cooperating members secured with fixings. In preferred embodiments of this aspect of the invention, the saddle tree or components thereof may comprise any other features described above in relation to the first and second aspects of the invention which may be applicable as is apparent by the context. Preferably, such features may be directed to features of the modular saddle tree and components thereof that contribute to achieving robust joining and mounting of the components of the modular saddle tree and of achieving a desired longitudinal rigidity for effective load transfer, including the formation of a reinforced peripheral portion and / or for achieving a desired torsional rigidity. Further, preferably the modular saddle tree and component parts of this aspect of the invention include features defined above that are relevant to longitudinal and torsional stiffness, materials of manufacture, methods of manufacture, dimensions and angles. Preferably, the component parts of the modular saddle tree of the present aspect of the invention are adapted from or the same as those described above and elsewhere herein in relation to other aspects. There is further provided a kit of parts for use in assembly of the modular saddle trees defined in the sixth aspect above. The kit of parts preferably comprises at least a head portion component and a seat portion component and, preferably, a connecting mid-portion component. Preferably, the kit of parts comprises a cantie. Preferably, the kit of parts comprises a gullet bar. Preferably, the kit of parts comprises stirrup bars. In each case, the component parts are selected from a range of that component part providing specific features (e.g. dimensions, angle, extent, and as described above) for that component and which, together with other component parts, provide particular features of the saddle tree that are desired A method of manufacturing a saddle tree of the sixth aspect of the invention is provided in a further aspect, the modular saddle tree being for use in the manufacture of a saddle specific to a horse or horse size and / or rider preference, the method comprising: selecting a seat portion component from a range of seat portion components having one or more different seat portion lengths, widths and configurations according to desired criteria; selecting a cantie portion component from a range of cantie portion components one or more of various widths and cantie angles and extents of projection according to desired criteria and affixing the same to the selected seat portion component; selecting a head portion component; selecting a gullet bar from a range of gullet bars having various degrees of curvature or gullet bar angles and affixing the same to the head portion component; and connecting the head portion component to the seat portion component, optionally by selecting a connecting mid-portion component from a range of mid-portion components of desired longitudinal extent and transverse rigidity according to desired criteria and affixing the mid-portion component to each of the seat portion component and the head portion component, thereby forming a saddle tree for use in manufacturing a saddle according to a combination of desired criteria. Preferably, the method further comprises selecting a cantie component from a range of cantie components and connecting the cantie component to the seat portion component. Preferably, the method further comprises selecting stirrup bars from a range of stirrup bars and affixing to the assembled saddle tree, via pre-existing fixings. The desired criteria may be selected, for example, from those mentioned elsewhere herein. Further aspects of the invention are directed, individually, to component parts for use in a modular saddle tree, such as that described herein. Thus, aspects of the invention are directed, individually, to a seat portion component, a head portion component, a connecting mid-portion component and a cantie, which are as further defined herein. In a ninth aspect of the invention, generally applicable to the various aspects and embodiments defined above and to any saddle tree arrangement, there is provided an adjustable head portion for a saddle tree, which adjustable head portion comprises a headplate configured for receiving, adapting its shape to and mounting to a gullet bar of any of a range of gullet bar angles. Preferably, according to this aspect, the gullet bar is interchangeable so that the saddle tree can be adapted to fit different horses. In a further, related aspect, there is provided a saddle which is adjustable to fit different horses requiring a range of gullet bar angles, wherein saddle comprises a saddle tree with an adjustable head portion comprises a headplate configured for receiving, adapting its shape to and mounting to a gullet bar of any of a range of gullet bar angles, and a means for accessing a gullet bar mounted at the underside of the headplate of the saddle tree, for detaching and removing the gullet bar and of inserting and affixing an alternative gullet bar of different gullet bar angle. For example, the saddle may be provided with a releasable flap or a pocket accessible from beneath the saddle which may provide access to the gullet bar. The adjustable head portion component may be as the head portion component as defined above and elsewhere herein, for example as comprising a headplate defining an arcuate form at the foremost part of the head portion, the headplate having straight or curved opposing sides leading to two opposing peripheral flank portions, typically flared outward relative to the sides of the headplate. The headplate is configured to receive and be mounted in relation to a gullet bar, being a rigid arcuate bar member typically having an arcuate central portion of defined curvature and two opposing side bar portions disposed at a predefined angle and opposing peripheral flank members, flared outward and for cooperating with the peripheral flank portions of the headplate. The gullet bar may be secured to the underside of the headplate by any suitable fixing means, but is preferably secured by means accessible via a flap or pocket in a saddle containing the head portion component Preferably, the head portion is adjustable so that the angle defined by the headplate can be adjusted to accommodate a gullet bar with a head plate or gullet bar angle of from 70 to 120° or any sub-range there, such as 75 to 110° or, for example, from 75 to 90° or 85 to 110°. Preferably, the head portion is adjustable so as to accommodate a gullet bar with a gullet bar angle at least of 5° range (e g. within the range 70 to 120°), preferably at least 10°, more preferably at least 20°, still more preferably at least 30° range. Optionally, the head portion may be adjustable so that the headplate may define a gullet bar angle that varies by up to 45°. Preferably, the head portion is configured to have a sufficient degree of flexibility in its headplate whereby the angle can be adjusted across the desired range of angles in order to fix to a range of gullet bar angles and sizes. This may be facilitated, for example, by the choice of material (e.g. having a lower filler or reinforcing fibre loading than other components of the saddle tree or by a material with a sufficient degree of flexibility, preferably resilient flexibility) and by the arrangement of any stiffness-inducing features such as ribs and vanes. Such ribs and vanes should be configured and orientated so as not to inhibit flex about the arcuate portion of the headplate of the head portion component. For example, such ribs and vanes may at the smaller, thinner and more disperse part (e.g. half) of the ranges mentioned above for the same and / or may be disposed in a largely longitudinal orientation. In one embodiment, ribs and vanes may be disposed in relation to the head portion component in a flared arrangement from rear to fore, to facilitate flex about the head portion. Preferably, the head portion component flexibility in relation to the headplate is facilitated by the provision of flex-enhancing features, particular about the arcuate portion of the head portion component. For example, notches, apertures and / or recesses may be disposed at or proximal to the fore edge of the headplate or head portion at the headplate to reduce weight and material resistance to pending. For example, slots (preferably elongate slots, e.g. up to 2 or 3 cm in length, preferably longitudinally disposed) or other apertures, may be formed in a collar portion, especially associated with an arcuate portion of the headplate, in order to increase the flexibility of the headplate to a range of gullet bar angles. For example, 3 to 8 slots of 1 to 3 mm in width may be used. This has the further advantage of reducing the weight of the head portion component. When secured or mounted together, the upper surfaces of the seat portion component and the head portion component and any connecting midportion component are preferably flush. Furthermore, preferably the outside edges of the components are configured to be flush so as to provide a continuous, unbroken outer edge of the assembled saddle tree. A cantie lateral edge is typically aligned with the seat portion lateral edge to give a continuous uninterrupted edge from the fore lateral edge of the head portion component all along the sides of the saddle tree, about the cantie and back to the opposing fore lateral edge. The invention will now be described in more detail, without limitation, with reference to the accompanying Figures. Features common throughout the figures share reference numbers. In Figure 1 A, there is illustrated an assembled modular saddle tree 101 composed of a seat portion component 103 for providing the seating area of a saddle for the user, a head portion component 105 toward the fore of the saddle tree, and a connecting mid-portion component 107 mounted to and linking both the head portion component 105 and the seat portion component 103. A cantie 109 is mounted to a rear edge 121 of the seat portion component 103 (typically using fixing screws that extend through cantie mounting apertures 147 recessed along the rear edge 121 to fix into a lower flange 149, better illustrated in Figure IC). The seat portion component 103, connecting mid-portion component 107 and head portion component 105 form a generally longitudinal arrangement of a saddle tree, which is typically symmetrical about a vertical plane on its longitudinal axis. The seat portion, connecting mid-portion and head portion components 103,107,105 typically have aligned lateral or outer edges 123, 125, 127 and the cantie lateral edge 129 is typically aligned with the seat lateral edge 123 to give a continuous uninterrupted edge from the fore lateral edge 127 of the head portion component 105, all along the sides of the saddle tree 101, about the cantie 109 and back to the opposing fore lateral edge 127. The head portion component 105 is shaped at its fore edge to form a generally arcuate headplate 113 extending along the fore edge of the head portion and extending to peripheral flank portions 131. The peripheral flank portions 131 are disposed at a flared angle relative to the adjoining part of the arcuate headplate 113. The seat portion, connecting mid-portion and head portion components 103,107,105 may be formed of any suitable material that achieves the desired longitudinal rigidity, whilst retaining dimensional stability in use (and being suitable for working and for applying fixings). Typically, they are formed of a filled polypropylene (or other suitable polymer), which may be injection moulded, preferably filled with glass fibres in an amount of about 10 to 30% by weight of the resulting filled polypropylene. The cantie 109 is typically made of plywood, as illustrated, or other similarly rigid synthetic material, so as to introduce further torsional rigidity across the rear half of the modular saddle tree 101. The headplate 113 is configured to receive and be mounted to a rigid, steel gullet bar 111, which is generally of arcuate, elongate bar shape and typically having an arcuate central portion 133, two opposing side bar portions 135, which are typically quite straight, and two flared end members 137, disposed at an angle flared outward relative to the side bar portions 135 and configured to cooperate with the peripheral flank portions 131. The head portion component 105 is preferably configured, as illustrated in Figures 1A to 1G to be sufficiently flexible about the longitudinal axis of the saddle tree (or more particularly about the apex of the arcuate headplate 113) to accommodate any of a range of gullet bars 111 defining a range of gullet angles (the angle between the opposing side bar portions 135), e.g. from 75° to 110c. The gullet bar 111 may be secured to the underside of the headplate 113 by way of fixing screws 139 through apertures in the gullet bar 111 and corresponding threads (not shown) formed in the underside of the headplate. It is intended that the gullet bar 111 be interchangeable, even after a saddle (not shown) is manufactured on the saddle tree 101, requiring that the completed saddle will have an accessible pocket accessible from the rear of the pommel at the underside of the head portion component 105 allowing access to the underside of the headplate 113 and the gullet bar 111 and enabling the fixing screws 139 to be removed, the gullet bar 111 removed and replaced with another with a different gullet bar angle and re-secured to the headplate 113, the angle of which will adjust accordingly, whereby the saddle can be adjusted or fitted to different horses. The gullet bar Illis shown more clearly, exploded from the headplate 113, in Figure IB. To allow the headplate 111 and the head portion component 105 more generally to have the necessary degree of flexibility for exchangeable gullet bars, the head portion component may be provided with flex-enhancing features, such as notches 141 formed at the fore edge 143 of the head portion component 105 (e.g. at the underside therefore) (as shown in Figure IB) and longitudinal stiffening vanes 145 disposed in a flared arrangement from rear to fore at the underside of the head portion component, thereby reducing the resistance by the head portion to opening and closing of the headplate / collar 111. Stirrup bars 115 may be provided on the head portion component 105, preferably mounted in two locations, such as adjacent the peripheral edge 127 and onto the flank portions 131, for a robust mounting. The seat portion component 103 and the head portion component 105 are mounted together via the connecting mid-portion component 107 as better illustrated in Figure ID and IE (showing the seat portion, connecting mid-portion and head portion components 103,107,105 with the seat portion component 103 removed) and in Figure IF and 1G (showing the head portion and connecting mid portion components 105,107, with the connecting mid-portion component removed). Seat portion component 105 is configured to mount to the connecting mid-portion component 107 by way of an upper seat flange (or upper seat overlapping projecting member) 151 to the fore of the seat portion, which extends the full width of the seat portion component 105 and has forward projecting peripheral elongate members 153, the flange 151 being mountable to a cooperating recess in the connecting mid-portion component 107 forming lower rear mid-flange (or mid-portion lower overlapping rear-projecting member) 155. To provide a robust mounting, to allow the transfer of load between and to reduce the risk of a weak point at a joint between the seat portion component 103 and the mid portion component 107, a significant degree of overlap between the upper seat flange 151 and the lower rear mid-flange 155 is provided, typically from a quarter to a half of the longitudinal extent of the seat portion component 103. A seat front edge 157 abuts a mid-rear edge 159 of a core element 161 (being the part of the upper surface of the connecting mid-portion component 107 that overlies the longitudinal axis of the saddle tree 1). The connecting mid-portion component 107 and the head portion component 105 are also mounted together by overlapping projecting portions and corresponding recesses. The connecting mid-portion component 107 is provided with a forward projecting mounting element or flange 163 comprising forward projecting mid-portion peripheral elongate members 165 configured to cooperate with corresponding peripheral head recesses 167 extending along a major part of the longitudinal extent of the head portion component 105. Lower rear-projecting elongate head members 169 are received in cooperating recesses (not shown) in the underside of the core element 161 of the connecting mid-portion 107. These cooperating elongate members and overlapping flanges, which also define midportion front edgel71 and head portion rear edges 173 that abut, serve to provide longitudinal stiffening of the saddle tree 101 and to provide robust mounting reducing the risk of a weak point at the joint. Multiple mounting fixings 175 are provided to secure the flange members 151,163 of the seat component 103 and mid-portion connecting component 107 and associated projecting elongate members 153,165 to the midportion connecting component 107 and head component 105 respectively (and to receiving recesses thereon), typically extending through apertures in the flange members 151,163 and received by receiving threads in the corresponding portion of the mid-portion connecting component 107 and head component 105. For example, a mounting fixing 175 is provided to a fore and rear overlapping portion of a projecting elongate member 153,165 and the corresponding part of a recessed mid-portion connecting component and head component thereby providing a robust, reinforced elongate peripheral portion, 177,179 of each of the mid-portion connecting component 107 and the head portion 105. These reinforced peripheral portions 177,179 are thereby provided with increased stiffening or rigidity in a longitudinal direction relative to the remainder of the mid portion connecting portion 107 and head portion 105 and thereby enable potential transfer of load. Typically, the point of contact with the greatest load between saddle and horse is facilitated at or around the flank portions 131 of the head component 105 of the saddle tree 101, since there is typically a point of contact at the flank portion 131 and, potentially, peripheral portions of the headplate. The provision of the stirrup bars 115 proximal to or mounted on the flank portions 131 leads to a potential concentration of load on the horse at or proximal to the flank portions 131. By providing reinforced elongate mid-head and reinforced elongate seat-mid peripheral portions 177,179, for example through the overlapped mounting of forward projecting seat elongate members 153 to the mid portion connecting component 107 and through the overlapped mounting of the mid portion peripheral elongate members and the head component 105, that are aligned (e.g. longitudinally aligned or generally aligned front to back insofar as the elongate path of respective reinforced peripheral portions 177,179 continues from one to the other) and are proximal, preferably adjacent or adjoining, load can be transferred from the flank portions 131 or proximal thereto along the length of the reinforced elongate mid-head and reinforced elongate seat-mid peripheral portions 177,179 and therefor along the outside edge of the saddle tree. Thereby load may be spread along the outside edge of the saddle tree and along the flanks of the horse. The elongate stiffening and reinforcement of the peripheral portions of the saddle tree is further provided along the periphery of the seat component 203 and toward the rear thereof by providing reinforcing inserts 281 into a corresponding peripheral recess 283 of the seat component 203 as illustrated in Figure 2. These are secured in place by insert fixing 282 (receiving through apertures of the inserts 281 and into corresponding receiving apertures or threads provided in the recess 283). The resulting reinforced elongate peripheral seat portion 284 extends generally longitudinally and is adjacent to or abuts the reinforced elongate seat-mid peripheral portion 277 thereby extending the longitudinally stiffened load transferring peripheral portions of the saddle tree 201 from the flank portions 231, via reinforced elongate mid-head and seat-mid peripheral portions 277,279 to the full length of the saddle tree 201, thereby allowing effective spread of the load upon the flank portions 231 or proximal thereto along the full length of the saddle tree. Figures 3 A to 3 C illustrate respectively the underside of the seat component 303, head component 305 and connecting component 307. In order to maintain a lightweight saddle tree while maintaining structural integrity and sufficient longitudinal rigidity, the components 303, 305 and 307 are formed of generally of a thin plastic material (of preferably no less than 2mm) to allow the weight to be kept low, with appropriate reinforcement. Longitudinal reinforcement is provided by way, firstly, of the above-described overlapping peripheral elongate members and reinforcing panel elements that provide a stiffened peripheral portion of the saddle tree. And, secondly, the central portions of the components 303,305,307 are longitudinally reinforced by the provision of generally longitudinally disposed ribs or vanes. Seat vanes 385 are provided generally longitudinally disposed, but optionally curved, on the underside of the seat component 303, the seat vanes 385 projecting typically from 2-4 mm from the underside of the seat component 303 and having a width of about 2-4 mm typically, as illustrated in Figure 3 A. This enhances the structural integrity and, in particular, the longitudinal rigidity of the seat portion. Seat flange ribs 386, of typically wider form, e.g. 4-8 mm wide and 1 to 4 mm projecting from the underside of the seat flange, serve to reinforce the overlapping flange portion of the seat component 303. Similarly, as illustrated in Figure 3B, the mid-portion connecting component is provided with mid-portion vanes 387 disposed in a central part of the mid-portion connecting component 307, while mid-portion ribs 388 serve to reinforce the mid-portion peripheral elongate members 365 that provide overlapping reinforcing peripheral elongate portions 377 in cooperation with the head component 305. In Figure 3C, the head component is illustrated as having head portion vanes 389 flared along the length of the collar portion toward the headplate so as to provide structural integrity and longitudinal stiffness without unduly resisting bend of the headplate about a longitudinal axis (to fit different gullet bar angles). Head portion ribs 390 are provided on the recessed portions 167 for overlapping with the mid-portion peripheral elongate members to contribute to elongate rigidity of the reinforced mid-head elongate peripheral portions. Torsional stiffness to a desired degree is provided by a combination of the general structural integrity of the saddle tree 101 in combination with torsional stiffness reinforcement features of, in particular, the seat component 103, the connecting component 107 and the cantie 109,which together define a reinforcing ‘box’ in which there the connecting component 107 is reinforced with an overlapping flange and reinforcing vanes in longitudinal and lateral orientation across its full width, which is adjacent to the reinforcing peripheral portions of the seat component 103 that extend back to the rear-edge of the seat portion in contact with the cantie, which is of rigid form (e.g. plywood). Together, these stiffening forms in a box shape on the body of the saddle tree, provide the desired degree of torsional stiffness. Also contributing to the torsional stiffness is the combination of reinforced mid-head elongate peripheral portions 179 which are linked, at the head end, by the arcuate headplate 113 and gullet bar 111 which is a rigid steel member. The longitudinal stiffness / rigidity is preferably of a range of 60 to 80 N / mm which may be measured by an arrangement as illustrated in Figure 4A. In Figure 4A, a rig 401 is provided comprising fore support posts 403 for supporting the flank portions and gullet bar of a saddle tree and rear support posts 405 for supporting the rear part of the seat of the saddle tree. Fore, mid and rear strain gauges 407,409,411 are disposed on the rig 401 configured to engage with a mid-point of the saddle tree (in the case of gauge 409), which is typically the narrowest point and the mid-points of the head and seat portions of the saddle tree in the case of gauges 407,411. To measure the longitudinal rigidity, a length of webbing was disposed over the approximate centre of the saddle tree and loaded with a weight (in the form of a dumbbell bar with weights loaded onto the ends thereof). Additional weights were successively loaded and strain gauge measurements taken. A value for longitudinal rigidity is calculated from the measurements from the strain gauges. Torsional stiffness / rigidity of a saddle tree is preferably of a range from 110 to 130 N / mm which may be measured by an arrangement as illustrated in Figure 4B. In Figure 4B, a torsional strain rig 413 is provided comprising a gullet support member 415, which in use, is clamped to the gullet bar / headplate of the saddle tree to secure it in place relative to the torsional strain rig 413, and a pivotally mounted cross-member 417 provided with rear-seat rotatably-mounted 5 support pads 419 for supporting two opposing peripheral portions of the seat of the saddle tree, preferably mid-points of the seat portion (e.g. the widest part of the saddle tree). The saddle tree (not shown) may be clamped to the pivotally mounted cross-member 417 to keep it in place. Two strain gauges 421 are provided on the rig to engage with the undersides of the pivotally mounted cross- 10 member 417, one at each side of the saddle tree. A mass (not shown) was suspended from one side of the pivotally mounted cross-member 417 and vertical displacement as measured by the strain gauges 421 recorded and then repeated with incrementally increasing suspended mass. The torsional stiffness may then be calculated from the readings obtained. 15 The invention has been described with reference to a preferred embodiment. However, it will be appreciated that variations and modifications can be effected by a person of ordinary skill in the art without departing from the scope of the invention.

Claims

28 08 251. A modular saddle tree comprising an assembly of a plurality of prefabricated component parts, the assembly comprising at least:5 a seat portion component;a head portion component; anda connecting mid-portion component having a core element defining front and back edges abutting corresponding edges of the head and seat portions, wherein the connecting mid portion is secured to each of the seat portion10 component and the head portion component,wherein the seat and head portion components are secured relative to one another by cooperating elongate longitudinal members, whereby a desired longitudinal rigidity is provided to the saddle tree,wherein the connecting mid portion component is secured to the seat portion 15 component and the head portion component by longitudinally extending elongatemembers projecting from the core element and / or from the seat portion component and / or from the head portion component,and wherein the elongate members cooperate with recesses and / or channels provided in the respective seat portion, connecting mid-portion and head portion 20 components.

2. A modular saddle tree as claimed in claim 1, wherein the connecting midportion component is secured to the seat portion component and / or the head portion component by cooperating projecting upper and lower flanges.

253. A modular saddle tree as claimed in claim 1 or claim 2, wherein the connecting mid-portion component comprises a core element and projecting therefrom two forward extending elongate members configured to be disposed either side of a central longitudinal saddle tree axis and wherein the head portion 30 component is provided with recesses and / or channels for cooperative engagement with the forward extending elongate members of the connecting mid-portion component.28 08 254. A modular saddle tree as claimed in claim 3, wherein the forward extending elongate members of the connecting mid-portion component extend into and overlap with the head portion component by an amount of from one-quarter to 5 three-quarters of the longitudinal extent of the head portion component.

5. A modular saddle tree as claimed in any one of the preceding claims, wherein the seat portion component has projecting therefrom two forward extending elongate members configured to be disposed either side of a central 10 longitudinal axis and wherein the connecting mid-portion component is provided with recesses and / or channels for cooperative engagement with the forward extending elongate members of the seat portion component.

6. A modular saddle tree as claimed in claim 5 wherein the forward15 extending elongate members of the seat portion component overlap with the connecting mid-portion component by from one-quarter to three-quarters of the longitudinal extent of the mid-portion component.

7. A modular saddle tree as claimed in any one of the preceding claims, 20 wherein the elongate members are the longitudinally extending elongate members.

8. A modular saddle tree as claimed in any one of the preceding claims, wherein the saddle tree further comprises one or more of:• a cantie component, optionally of injection-moulded plastic, wood or 25 composite wood material, fixedly mounted to a rear portion of a seatportion component;• a gullet bar, preferably of steel, mounted to the head portion component;• stirrup bar support members formed on or mounted in relation to the head portion component and / or the seat portion component and / or the30 connecting mid-portion, for supporting stirrup bars, preferably of metalsuch as aluminium bronze;28 08 25• points, optionally of wood or composite wood material, mounted to a fore part of the head portion component.

9. A modular saddle tree as claimed in any one of the preceding claims, 5 wherein the seat portion component, head portion component and any connecting mid-section are formed of injection-moulded plastic.

10. A modular saddle tree as claimed in any one of the preceding claims, wherein the elongate cooperating longitudinal members are formed of plastic (e.g.10 injection-moulded plastic) or steel.

11. A kit of parts for use in assembling a saddle tree as defined in any one ofclaims 1 to 10.15

Images