EP0298263A1 - A pair of foldable trestles - Google Patents

A pair of foldable trestles Download PDF

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Publication number
EP0298263A1
EP0298263A1 EP88109118A EP88109118A EP0298263A1 EP 0298263 A1 EP0298263 A1 EP 0298263A1 EP 88109118 A EP88109118 A EP 88109118A EP 88109118 A EP88109118 A EP 88109118A EP 0298263 A1 EP0298263 A1 EP 0298263A1
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EP
European Patent Office
Prior art keywords
feet
articulated
axis
easel
compass
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Granted
Application number
EP88109118A
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German (de)
French (fr)
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EP0298263B1 (en
Inventor
Jean-Paul Mérigot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Macc Batiment
Original Assignee
Sa Macc
Macc Batiment
Macc SA
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Application filed by Sa Macc, Macc Batiment, Macc SA filed Critical Sa Macc
Publication of EP0298263A1 publication Critical patent/EP0298263A1/en
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Publication of EP0298263B1 publication Critical patent/EP0298263B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/06—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of trestle type

Definitions

  • French patent n ° 1.246304 describing a metal trestle with retractable feet and automatic opening under the action of a spring.
  • French patent n ° 2.487722 describing a folding trestle made up of two bent tubes, articulated around an axis and blocking them simultaneously with the opening.
  • French patent n ° 2.291329 describing a trestle made up of a vertical frame on which are articulated struts acting as feet, kept apart by connecting rods themselves articulated.
  • French patent n ° 2.220661 describes a trestle whose feet can be folded outwardly along the crossbar.
  • French patent n ° 2.418062 describing a removable trestle in separate elements.
  • French patent n ° 2.395112 describing a non-folding trestle equipped with casters and able to receive a bin.
  • Patent n ° 2.404722 addition to patent n ° 73.09643 describing a trestle, the feet of which can be dismantled and can be fitted into boxes secured to the crosspiece.
  • French patent n ° 1.504664 describes a telescopic trestle with claw.
  • French patent n ° 2.454877 describes a trestle whose articulated feet wedge a crosspiece.
  • US patent n ° 84/03347 describes a work easel whose feet are removable and held by straps during transport.
  • French patent n ° 2.389351 describes a folding easel made up of tubular frames hinged together.
  • French patent n ° 2.515242 describes a hinge for a trestle made up of two articulated frames.
  • French patent n ° 2.478782 describes a removable metal trestle.
  • French patent n ° 2.439931 describes a trestle whose legs are foldable.
  • French patent n ° 2.221033 describes a safety hinge for a folding trestle.
  • the present invention aims to bring improvements to these different models of easels, so as to facilitate their storage and transport, to simplify their deployment during installation for use and to increase their rigidity and stability in this working position.
  • the first improvement obtained resides in the fact that the feet fold inside the U-shaped cross member and, therefore, completely disappear, thus producing a compact product.
  • the second improvement concerns the deployment of the feet whose execution is simple and fast thanks to the combined compasses. Indeed, a blocking action exerted on the part of the compass acting as a strut makes it possible to simultaneously ensure the transverse spacing and the blocking in position of the articulated feet.
  • Another improvement concerns the increase in rigidity and stability of the feet in the deployed position, this thanks to an axis acting as a stop, thus limiting the opening of the feet and opposing the thrust exerted by the part of the compass acting of a strut.
  • the transport and the storage are facilitated by a fourth improvement which makes it possible to join face to face the pair of easels, joining obtained by means of a spring coming to engage, because of its elasticity, around a pin.
  • the pair of easels thus paired can be easily stored, the whole taking the form of a tube of rectangular section. Manual transport is then very easy thanks to a handle secured to a U profile wing constituting the crosspiece of one of the easels.
  • One end is articulated on the cross member 1 around an axis 16. This point of articulation is located in the axis of symmetry of the cross member 1.
  • the other end of the same part 8 of the compass is articulated on an axis 17 carried by a bracket 7, itself articulated on the part 3 of the compass around the axis 18.
  • part 3 of the compass articulated in its middle around the axis 18, is also at each of its ends, on the foot 6 around the axis 19 on the foot 2 around the axis 20.
  • the locking and spacing of the feet 2 and 6 is obtained by exerting manual pressure, from top to bottom, in the area of the axis 21 of the part 8 of the compass (FIG. 4).
  • the vertical manual pushing action on the axis 21 of the part 8 of the compass causes the deployment of said compass, simultaneously causing a reaction force of the axis 16, forcing feet 2 and 6 to pivot around the axis 4 to come into abutment on an axis 5 limiting the pivoting.
  • the part 8 of the compass then arcs around its axis 21 cooperating with a stop 9, in order to obtain a blocking giving great rigidity and stability to the bridge in the working position.
  • FIG. 6 represents the feet 2 and 6 articulated around the axis 4 secured to the cross-member 1.
  • the legs 2 and 6 deployed take an oblique position thanks to oblong holes made in the longitudinal direction in the said feet crossed by the axis 4 ( Figure 6 A).

Abstract

Trestle equipped with two double compasses (3, 8) which, through the action of a simple pressure, make it possible automatically and simultaneously to deploy and lock the legs (2, 6), whilst conferring a high level of stability. According to another arrangement, the trestle (1) can be assembled as a pair, by means of a spring (13) and a pin (14). A gripping handle (15) is provided so as to facilitate transportation of this pair of trestles thus coupled together. <IMAGE>

Description

Il existe différents modèles de chevalets destinés à supporter un plan de travail, ou un objet à ouvrager.There are different models of easels intended to support a work plan, or an object to be worked.

Ces chevalets sonts constitués d'une traverse avec des pieds fixes rabatta­bles, repliables ou démontables, afin d'en faciliter le transport dans un véhicule.These easels are made up of a crosspiece with fixed folding, folding or removable feet, in order to facilitate transport in a vehicle.

On connaît plusieurs modèles de réalisation de ce type de matériel, faisant l'objet des brevets désignés ci-après :
Brevet Français n° 1.246304 décrivant un tréteau métallique à pieds escamo­tables et à ouverture automatique sous l'action d'un ressort.
Brevet Français n° 2.487722 décrivant un tréteau pliant composé de deux tubes coudés, articulés autour d'un axe et se bloquant entre eux simultané­ment avec l'ouverture.
Brevet français n° 2.291329 décrivant un tréteau constitué d'un cadre vertical sur lequel sont articulées des contrefiches faisant office de pieds, maintenues en écartement par des biellettes elles-mêmes articulées.
Brevet Français n°2.220661 décrit un tréteau dont les pieds sont repliables extérieurement le long de la traverse.
Brevet Français n°2.418062 décrivant un tréteau démontable en éléments séparés.
Brevet Français n° 2.395112, décrivant un tréteau non repliable équipé de roulettes et pouvant recevoir un bac.
Brevet n° 2.404722, addition au brevet n° 73.09643 décrivant un tréteau dont les pieds sont démontables et peuvent être emboités dans des boitiers solidaires de la traverse.
Brevet Français n° 1.504664 décrit un tréteau télescopiques à griffe.
Brevet Fançais n° 2.454877 décrit un tréteau dont les pieds articulés viennent coincer une traverse.
Brevet US n° 84/03347, décrit un chevalet de travail dont les pieds sont démontables et maintenus par des sangles lors du transport.
Brevet Français n° 2.389351, décrit un chevalet pliant constitué de cadres tubulaires articulés entre eux.
Brevet Français n° 2.515242 décrit une charnière pour tréteau constitué de deux cadres articulés.
Brevet Français n° 2.478782 décrit un tréteau métallique démontable.
Brevet Français n°2.439931 décrit un tréteau dont les pieds sont rabatta­bles.
Brevet Français n° 2.221033 décrit une charnière de sécurité pour tréteau pliant.Several models are known for producing this type of material, subject to the patents designated below:
French patent n ° 1.246304 describing a metal trestle with retractable feet and automatic opening under the action of a spring.
French patent n ° 2.487722 describing a folding trestle made up of two bent tubes, articulated around an axis and blocking them simultaneously with the opening.
French patent n ° 2.291329 describing a trestle made up of a vertical frame on which are articulated struts acting as feet, kept apart by connecting rods themselves articulated.
French patent n ° 2.220661 describes a trestle whose feet can be folded outwardly along the crossbar.
French patent n ° 2.418062 describing a removable trestle in separate elements.
French patent n ° 2.395112 , describing a non-folding trestle equipped with casters and able to receive a bin.
Patent n ° 2.404722, addition to patent n ° 73.09643 describing a trestle, the feet of which can be dismantled and can be fitted into boxes secured to the crosspiece.
French patent n ° 1.504664 describes a telescopic trestle with claw.
French patent n ° 2.454877 describes a trestle whose articulated feet wedge a crosspiece.
US patent n ° 84/03347 , describes a work easel whose feet are removable and held by straps during transport.
French patent n ° 2.389351 , describes a folding easel made up of tubular frames hinged together.
French patent n ° 2.515242 describes a hinge for a trestle made up of two articulated frames.
French patent n ° 2.478782 describes a removable metal trestle.
French patent n ° 2.439931 describes a trestle whose legs are foldable.
French patent n ° 2.221033 describes a safety hinge for a folding trestle.

La présente invention a pour but d'apporter des perfectionnements à ces différents modèles de chevalets, de façon à faciliter leur rangement et leur transport, à simplifier leur déploiement lors de la mise en place pour utilisation et d'augmenter leur rigidité et stabilité dans cette posi­tion de travail.The present invention aims to bring improvements to these different models of easels, so as to facilitate their storage and transport, to simplify their deployment during installation for use and to increase their rigidity and stability in this working position.

La première amélioration obtenue réside dans le fait que les pieds se re­plient à l'intérieur de la traverse en forme de U et, par conséquent, s'ef­facent complètement réalisant ainsi un produit compact.The first improvement obtained resides in the fact that the feet fold inside the U-shaped cross member and, therefore, completely disappear, thus producing a compact product.

Cette amélioration est obtenue grâce à des pieds articulés sur un axe et reliés à une traverse par la conjugaison de deux compas disposés en Té. Les pieds se replient cote à cote à l'intérieur de la traverse en forme de U, opération facilitée par la position axiale des compas par rapport à la travere et par la conception de leur mode de repliage.This improvement is obtained thanks to feet articulated on an axis and connected to a crosspiece by the combination of two compasses arranged in Tee. The feet fold side by side inside the U-shaped cross member, an operation facilitated by the axial position of the compasses relative to the beam and by the design of their folding mode.

La deuxième amélioration concerne le déploiement des pieds dont l'exécution est simple et rapide grâce aux compas conjugués. En effet, une action de blocage exercée sur la partie de compas faisant office de jambe de force permet d'assurer simultanément l'écartement transversal et le blocage en position des pieds articulés.The second improvement concerns the deployment of the feet whose execution is simple and fast thanks to the combined compasses. Indeed, a blocking action exerted on the part of the compass acting as a strut makes it possible to simultaneously ensure the transverse spacing and the blocking in position of the articulated feet.

Une autre amélioration concerne l'augmentation de rigidité et de stabilité des pieds en position déployée, ceci grâce à un axe tenant lieu de butée, limitant ainsi l'ouverture des pieds et s'opposant à la poussée exercée par la partie du compas faisant office de jambe de force.Another improvement concerns the increase in rigidity and stability of the feet in the deployed position, this thanks to an axis acting as a stop, thus limiting the opening of the feet and opposing the thrust exerted by the part of the compass acting of a strut.

Le transport et le rangement sont facilités par une quatrième amélioration qui permet de solidariser face à face la paire de chevalets, solidarisation obtenue au moyen d'un ressort venant s'enclencher, du fait de son élastici­té, autour d'une épingle.The transport and the storage are facilitated by a fourth improvement which makes it possible to join face to face the pair of easels, joining obtained by means of a spring coming to engage, because of its elasticity, around a pin.

La paire de chevalets ainsi jumelée peut se ranger aisément, l'ensemble prenant une forme de tube de section rectangulaire. Le transport manuel se fait alors très facilement grâce à une poignée solidaire d'une aile de profilé U constituant la traverse d'un des chevalets.The pair of easels thus paired can be easily stored, the whole taking the form of a tube of rectangular section. Manual transport is then very easy thanks to a handle secured to a U profile wing constituting the crosspiece of one of the easels.

L'invention est exposée ci-après plus en détail à l'aide de dessins repré­sentant seulement un mode d'exécution.

  • La figure 1 représente, en perspective, un chevalet déplié en position d'utilisation, composé d'une traverse 1 sur laquelle sont articulés autour d'un axe 4, des pieds 2 et 6.
    L'écartement et la rigidité des pieds sont obtenus au moyen d'un double compas dont nous distinguons les deux parties 3 et 8 faisant fonction de genouillères de blocage.
  • La figure 2 représente, en perspective, le chevalet en position repliée avec les pieds 2 et 6 totalement escamotés à l'intérieur du profil U cons­tituant la traverse 1.
  • La figure 3 représente, en perspective, une paire de chevalets jumelés par clipsage, l'ensemble constituant alors un produit de forme tubulaire dont la manutention est facilitée par la poignée de préhension 15.
  • La figure 4 et la figure 5 représentent l'assemblage des pieds 6 de la traverse 1 et du double compas 3 et 8.
The invention is set out below in more detail with the aid of drawings representing only one embodiment.
  • FIG. 1 represents, in perspective, an easel unfolded in the position of use, composed of a cross member 1 on which are articulated around an axis 4, feet 2 and 6.
    The spacing and the rigidity of the feet are obtained by means of a double compass of which we distinguish the two parts 3 and 8 acting as locking knee pads.
  • FIG. 2 represents, in perspective, the easel in the folded position with the feet 2 and 6 completely retracted inside the profile U constituting the cross-member 1.
  • FIG. 3 represents, in perspective, a pair of easels twinned by clipping, the assembly then constituting a product of tubular shape, the handling of which is facilitated by the grip handle 15.
  • FIG. 4 and FIG. 5 represent the assembly of the feet 6 of the cross-member 1 and of the double compass 3 and 8.

Une extrémité est articulée sur la traverse 1 autour d'un axe 16. Ce point d'articulation est situé dans l'axe de symétrie de la traverse 1.One end is articulated on the cross member 1 around an axis 16. This point of articulation is located in the axis of symmetry of the cross member 1.

L'autre extrémité de la même partie 8 du compas est articulée sur un axe 17 porté par une équerre 7, elle-même articulée sur la partie 3 du compas autour de l'axe 18.The other end of the same part 8 of the compass is articulated on an axis 17 carried by a bracket 7, itself articulated on the part 3 of the compass around the axis 18.

Suivant figures 4 et 6, la partie 3 du compas articulé en son milieu autour de l'axe 18, l'est aussi à chacune de ses extrémités, sur le pied 6 autour de l'axe 19 sur le pied 2 autour de l'axe 20.According to Figures 4 and 6, part 3 of the compass articulated in its middle around the axis 18, is also at each of its ends, on the foot 6 around the axis 19 on the foot 2 around the axis 20.

Le blocage et l'écartement des pieds 2 et 6 s'obtiennent en exerçant une pression manuelle, de haut en bas, dans la zone de l'axe 21 de la partie 8 du compas (figure 4).The locking and spacing of the feet 2 and 6 is obtained by exerting manual pressure, from top to bottom, in the area of the axis 21 of the part 8 of the compass (FIG. 4).

Cette poussée provoque le déploiement de la partie 3 du compas (figures 4 et 6) qui, par son action, par l'intermédiaire des axes 19 et 20, fait écarter les pieds 2 et 6.This thrust causes the deployment of part 3 of the compass (FIGS. 4 and 6) which, by its action, via the axes 19 and 20, causes the feet 2 and 6 to spread apart.

L'action de poussée manuelle verticale sur l'axe 21 de la partie 8 du com­pas provoque le déploiement du dit compas, entraînant simultanément une force de réaction de l'axe 16, obligeant les pieds 2 et 6 à pivoter autour de l'axe 4 pour venir en butée sur un axe 5 limitant le pivotement.The vertical manual pushing action on the axis 21 of the part 8 of the compass causes the deployment of said compass, simultaneously causing a reaction force of the axis 16, forcing feet 2 and 6 to pivot around the axis 4 to come into abutment on an axis 5 limiting the pivoting.

La partie 8 du compas s'arc-boute alors autour de son axe 21 coopérant avec une butée 9, pour obtenir un blocage conférant une grande rigidité et stabilité au chevalet en position de travail.The part 8 of the compass then arcs around its axis 21 cooperating with a stop 9, in order to obtain a blocking giving great rigidity and stability to the bridge in the working position.

La figure 6 représente les pieds 2 et 6 articulés autour de l'axe 4 solidai­re de la traverse 1.FIG. 6 represents the feet 2 and 6 articulated around the axis 4 secured to the cross-member 1.

Les pieds 2 et 6 déployés prennent une position oblique grâce à des trous oblongs pratiqués dans le sens longitudinal dans les dits pieds traversés par l'axe 4 (figure 6 A).The legs 2 and 6 deployed take an oblique position thanks to oblong holes made in the longitudinal direction in the said feet crossed by the axis 4 (Figure 6 A).

Suivant figure 7, lorsque les pieds 2 et 6 sont déployés, le ressort 13 monté sur l'axe 4 est en position dite de repos.According to Figure 7, when the feet 2 and 6 are deployed, the spring 13 mounted on the axis 4 is in the so-called rest position.

Suivant figure 8, lorsque les pieds 2 et 6 d'une paire de chevalets sont repliés et logés dans leur traverse respective 1 en forme de U, ce même ressort 13, équipant un des deux chevalets vient s'enclencher automatique­ment sur une épingle 14 prévue sur l'autre chevalet. La paire de chevalets forme alors un seul bloc équipé d'une poignée 15 (voir figure 3) facilitant sa préhension et son transport.According to FIG. 8, when the feet 2 and 6 of a pair of easels are folded up and housed in their respective cross-member 1 in the shape of a U, this same spring 13, equipping one of the two easels comes to engage automatically on a pin 14 provided on the other easel. The pair of easels then forms a single block equipped with a handle 15 (see Figure 3) facilitating its gripping and transport.

Claims (4)

1. Chevalet comprenant une traverse et des pieds blocables, caractérisé en ce que l'extrémité supérieure de la partie 8 du double-compas, disposé en Té, est articulée en un point situé dans l'axe symétrique de la face intérieure de la traverse, pendant que son autre extrémité inférieure est articulée sur une équerre 7, elle-même solidaire de l'autre partie 3 du double compas, elle-même articulée à chacune de ses deux extrémités sur les pieds 2 et 6.
Cette conception et cette disposition du double compas permettent d'ob­tenir simultanément sur une simple pression exercée sur la partie 8 du double compas (faisant office de jambe de force), le déploiement et le blocage des pieds.1. Easel comprising a crossmember and lockable feet, characterized in that the upper end of part 8 of the double compass, arranged in a Tee, is articulated at a point located in the symmetrical axis of the internal face of the crossmember , while its other lower end is articulated on a square 7, itself integral with the other part 3 of the double compass, itself articulated at each of its two ends on the feet 2 and 6.
This design and this arrangement of the double compass makes it possible to simultaneously obtain, on a simple pressure exerted on the part 8 of the double compass (acting as a strut), the deployment and the blocking of the feet. 2. Chevalet, suivant revendication 1, caractérisé en ce qu'il comporte un axe 5 tenant lieu de butée, destinée à limiter l'ouverture des pieds tout en formant une réaction à la poussée exercée sur la partie 8 du dou­ble compas faisant office de jambe de force. Cette particularité confère à l'ensemble une plus grande rigidité.2. Easel, according to claim 1, characterized in that it comprises an axis 5 serving as a stop, intended to limit the opening of the feet while forming a reaction to the thrust exerted on the part 8 of the double compass acting as strenght leg. This characteristic gives the whole a greater rigidity. 3. Chevalet, suivant revendication 1, caractérisé en ce qu'il peut être solidarisé par paire grâce à l'action conjugée d'un ressort 13 et d'une épingle 14.3. Easel according to claim 1, characterized in that it can be joined in pairs by the combined action of a spring 13 and a pin 14. 4. Chevalet, suivant revendication 3, caractérisé en ce que la paire de chevalets ainsi assemblés est équipée d'une poignée de préhension 15.4. Easel, according to claim 3, characterized in that the pair of easels thus assembled is equipped with a grip 15.
EP19880109118 1987-07-06 1988-06-08 A pair of foldable trestles Expired - Lifetime EP0298263B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709601A FR2617944B1 (en) 1987-07-06 1987-07-06 IMPROVEMENT ON EASELS
FR8709601 1987-07-06

Publications (2)

Publication Number Publication Date
EP0298263A1 true EP0298263A1 (en) 1989-01-11
EP0298263B1 EP0298263B1 (en) 1992-05-27

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EP19880109118 Expired - Lifetime EP0298263B1 (en) 1987-07-06 1988-06-08 A pair of foldable trestles

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EP (1) EP0298263B1 (en)
DE (1) DE3871445D1 (en)
ES (1) ES2031953T3 (en)
FR (1) FR2617944B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU681591B2 (en) * 1992-07-16 1997-09-04 Medical Research Council Peptides that mimic gp120 HIV epitope

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2174756B1 (en) * 2008-10-07 2011-05-04 Macc Pair of foldable trestles
CN113369678B (en) * 2021-08-12 2021-10-12 徐州达一重锻科技有限公司 Laser cutting machine that multi-angle was adjusted

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH151740A (en) * 1930-11-06 1931-12-31 Rosenberger Joh Collapsible trestle.
US1935871A (en) * 1932-08-15 1933-11-21 Earl J Coffed Saw horse or trestle
US2639197A (en) * 1950-03-11 1953-05-19 James L Chelsea Portable sawhorse
US2755144A (en) * 1951-11-20 1956-07-17 James D Simmons Folding trestle
CH421862A (en) * 1965-03-26 1966-09-30 Mueller Wilhelm Collapsible work trestle
US4046221A (en) * 1976-03-17 1977-09-06 Edenfield Neal M Saddle support
US4489808A (en) * 1983-10-24 1984-12-25 Voye Bradford D Collapsible sawhorse
US4640386A (en) * 1986-02-14 1987-02-03 Hall James W Folding utility horse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH151740A (en) * 1930-11-06 1931-12-31 Rosenberger Joh Collapsible trestle.
US1935871A (en) * 1932-08-15 1933-11-21 Earl J Coffed Saw horse or trestle
US2639197A (en) * 1950-03-11 1953-05-19 James L Chelsea Portable sawhorse
US2755144A (en) * 1951-11-20 1956-07-17 James D Simmons Folding trestle
CH421862A (en) * 1965-03-26 1966-09-30 Mueller Wilhelm Collapsible work trestle
US4046221A (en) * 1976-03-17 1977-09-06 Edenfield Neal M Saddle support
US4489808A (en) * 1983-10-24 1984-12-25 Voye Bradford D Collapsible sawhorse
US4640386A (en) * 1986-02-14 1987-02-03 Hall James W Folding utility horse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU681591B2 (en) * 1992-07-16 1997-09-04 Medical Research Council Peptides that mimic gp120 HIV epitope

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FR2617944B1 (en) 1990-09-28
EP0298263B1 (en) 1992-05-27
FR2617944A1 (en) 1989-01-13
DE3871445D1 (en) 1992-07-02
ES2031953T3 (en) 1993-01-01

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