Claims:WE CLAIM
1. A fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines comprising a base plate [1] provided with multitude of through holes [2], wherein a leg [3] is provided at an intermediate location of the base plate [1] between the holes [2] and a bolt [4] is placed through the leg [3].

2. The fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines as claimed in claim 1, wherein the leg [3] is pierced through the base plate [1] with its protruded part on one side of the plate [1], in which the leg is having hollow cylindrical section.

3. The fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines as claimed in claim 1 or 2, wherein a nut [5] is superimposed on the protruded part of the leg [3].

4. The fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines as claimed in claims 1-3, wherein the bolt [4] is fastened to the extension leg [3] by the nut [5].

5. The fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines as claimed in claims 1-4, wherein the fixture is made of metallic material including stainless steel.

6. A method for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines by a fixture comprising steps of:
- Positioning said base plate [1] of the fixture with the grips that the holes [2] provided in the base plate [1] align with the holes in the grip;
- Placement of bolt [4] fastened to the extension leg [3] under the jaw face;
- push on the jaw face by the rotation of bolt [4] inside its female portion causes upward movement of the jaw face Since the annular portion between the jaw face and ring of the hydraulic grip is lubricated;
- holding of one jaw face at a higher position, which gives space for the next jaw face to slide and come out of the hydraulic grip.
, Description:FIXTURE AND METHOD FOR REMOVING/INSERTING JAW FACES OF HYDRAULIC GRIP IN DYNAMIC TEST MACHINES

FIELD OF INVENTION:
[001] The present invention relates to a fixture used to remove / insert jaw faces of a high capacity hydraulic test machines like Instron 1276. In particular, the invention is directed to a fixture and method for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines.

BACKGROUND OF THE INVENTION/PRIOR ART:
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[003] The pair of jaw faces used in hydraulic testing machines are constructed in a tapered fashion to enable strong griping of the samples. The closing of the jaw faces is done by moving a ring enveloping the faces which is pushed by the hydraulic force. In order to change the jaw face for accommodating a higher size sample in the event of maintenance, it is a strenuous activity to pull the pair of jaw faces out of the ring or the grip itself. It is near to impossible at times due to the tapered shape of the jaw face. Even if we remove the fastener holding one jaw, it cannot be taken out as the shape is bisectioned truncated cone and the tapper in the surface guides the jaw in such a fashion that it comes and gets locked with the other jaw. So in no way the jaw faces can be removed just by removing the fasteners. Hence, a fixture needs to be designed and fabricated to hold one jaw face in place and removes the other. Hence, the fixture avoids self-locking of the pair of jaw face and the same can be used to remove and reinsert when needed.
OBJECTS OF THE INVENTION:
[004] An objective of the invention is to design and fabricate a fixture used to remove/Insert the pair of Jaw Faces of a Hydraulic Grip in high capacity Dynamic test machines.
[005] Another objective of the invention is to provide a fixture used to remove / insert jaw faces of a high capacity hydraulic test machines, which obviates shortcomings of the prior art(s).
[006] Still another objective of the invention is to provide a fixture used to remove / insert jaw faces of a high capacity hydraulic test machines, which is simple in construction.
[007] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.

SUMMARY OF THE INVENTION:
[008] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus/composition and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.

[009] There are conventional dynamic testing equipments available world vide to perform fatigue testing of standard samples. In the event of changing the sample size, the jaw face needs to be changed to suit the size of the sample. Due to the tapered and truncated shape of the jaw faces, it is near to impossible to remove the jaw face just by loosening the fasteners. Hence a fixture is mandatory to assist the operator in removing the jaw faces from the grip. Therefore, the present invention has been introduced.
[0010] According to this invention, there is provided a fixture for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines comprising a base plate [1] provided with multitude of through holes [2], wherein a leg [3] is provided at an intermediate location of the base plate [1] between the holes [2] and a bolt [4] is placed through the leg [3].
[0011] The leg [3] is pierced through the base plate [1] with its protruded part on one side of the plate [1], in which the leg is having hollow cylindrical section.
[0012] A nut [5] is superimposed on the protruded part of the leg [3].

[0013] The bolt [4] is fastened to the extension leg [3] by the nut [5].
[0014] Further, according to this invention, there is provided a method for removing/inserting Jaw Faces of Hydraulic Grip in Dynamic test machines by a fixture comprising steps of:
- Positioning said base plate [1] of the fixture with the grips that the holes [2] provided in the base plate [1] align with the holes in the grip;
- Placement of bolt [4] fastened to the extension leg [3] under the jaw face;
- push on the jaw face by the rotation of bolt [4] inside its female portion causes upward movement of the jaw face Since the annular portion between the jaw face and ring of the hydraulic grip is lubricated;
- holding of one jaw face at a higher position, which gives space for the next jaw face to slide and come out of the hydraulic grip.

[0015] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
[0016] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

[0017] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
[0018] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein:-

Figure 1 shows: Top view of the fixture according to the present invention.
Figure 2 shows: Front view of the fixture in accordance with the invention.
Figure 3 shows: Isometric view of the fixture of the invention.

[0019] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION WITH REFRENCE TO THE ACCOMPANYING DRAWINGS:
[0020] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0021] The present invention makes a disclosure regarding a technology pertaining to a fixture and method used to remove / insert jaw faces of a high capacity hydraulic test machines.

[0022] Now, reference may be made to the accompanying Figures 1, 2 and 3.

[0023] As discussed the objective of the invention is to design and fabricate a fixture used to remove/Insert the pair of Jaw Faces of a Hydraulic Grip in high capacity Dynamic test machines. The fixture includes the following parts:
1 – Base plate of fixture
2 – Holes for fastening the fixture to the plane of grip
3 – Extended leg to facilitate movement of jaw
4 – Hexagonal head bolt to push the jaw face

[0024] The fixture of the invention comprises a base plate [1] provided with multitude of through holes [2]. A leg in the form of protruding part [3] is provided at an intermediate location of the base plate [1] between the holes [2] as shown in the figures. This leg [3] is pierced through the base plate [1] with its protruded part on one side of the plate [1], wherein the leg is having hollow cylindrical section. A bolt [4] is placed through the leg [3] and also the bolt [4] is fastened to the extension leg [3] by means of a nut [5]. Here, the nut [5] is superimposed on the protruded part of the leg [3] as best seen in figure 3.

[0025] The fixture is made of metal including stainless steel without restricting scope of the invention to the same. Thus, other materials readily apparent to a person skilled in the art understood to be within purview of the invention.

[0026] Said base plate [1] of the fixture is positioned with the grips so that the holes provided in the fixture align exactly with the existing holes in the grip. The bolt [4] fastened to the extension leg [3] is now just placed under the jaw face. Since the annular portion between the jaw face and ring of the hydraulic grip is lubricated, a gentle push on the jaw face assists it to move up. The push is given by the rotation of bolt [4] inside its female portion.

[0027] As now one jaw face is held at a higher position, it gives enough space for the next jaw face to slide and come out of the hydraulic grip. Thus holding of one of the jaw faces at an elevated position, avoids any chance for self-locking of the pair of jaws. Hence, this enables operator to remove the jaw face during any maintenance activity.

ADVANTAGES OF INVENTION
- The fixture is portable.
- It can be universally used for any capacity of machine.
- Light weight.
- Easy to handle.
- Simple in construction.

[0028] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[0029] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

[0030] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to “at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B”.

[0031] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.

[0032] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.

[0033] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.

[0034] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.