EP0076440B1 - Device for retaining a ground glass insert on a ground glass neck portion - Google Patents

Device for retaining a ground glass insert on a ground glass neck portion Download PDF

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Publication number
EP0076440B1
EP0076440B1 EP82108835A EP82108835A EP0076440B1 EP 0076440 B1 EP0076440 B1 EP 0076440B1 EP 82108835 A EP82108835 A EP 82108835A EP 82108835 A EP82108835 A EP 82108835A EP 0076440 B1 EP0076440 B1 EP 0076440B1
Authority
EP
European Patent Office
Prior art keywords
clamp
ground
rings
ring
ground glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82108835A
Other languages
German (de)
French (fr)
Other versions
EP0076440A3 (en
EP0076440A2 (en
Inventor
Hermann Dr. Keck
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.)
Schott AG
Original Assignee
Hermann Dr. Keck
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CH6405/81 priority Critical
Priority to CH6405/81A priority patent/CH647732A5/en
Application filed by Hermann Dr. Keck filed Critical Hermann Dr. Keck
Publication of EP0076440A2 publication Critical patent/EP0076440A2/en
Publication of EP0076440A3 publication Critical patent/EP0076440A3/en
Application granted granted Critical
Publication of EP0076440B1 publication Critical patent/EP0076440B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/56Labware specially adapted for transferring fluids
    • B01L3/565Seals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00Supporting devices; Holding devices
    • B01L9/50Clamping means, tongs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y10T24/44769Opposed engaging faces on gripping member formed from single piece of resilient material
    • Y10T24/44906Opposed engaging faces on gripping member formed from single piece of resilient material having specific surface irregularity on or along engaging face
    • Y10T24/44915Corrugated or toothed face
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/44Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y10T24/44932Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member having specific surface material or irregularity on or along engaging face

Description

  • Die vorliegende Erfindung betrifft eine Schliffklammer zum Zusammenhalten des Kerns und der Hülse von Glasschliffen, bei der die Klammerarme konzentrisch übereinander angeordnet sind und jeweils eine Aussparung zum Durchlaß für die zu verbindenden röhrenförmigen Elemente aufweisen, und wobei sie einstückig bogenförmig miteinander verbunden sind.The present invention relates to a joint clamp for holding the core and the sleeve of ground glass, in which the clamp arms are arranged concentrically one above the other and each have a recess for passage for the tubular elements to be connected, and wherein they are connected in one piece in an arcuate manner.
  • Eine solche Schliffklammer ist aus der FR-A-1 581 182 bekannt. Diese Schliffklammer besteht aus drei Teilen, nämlich einer Federplatte in U-Form und zwei abnehmbaren Hebelarmen zum Öffnen der Federplatte. Die U-förmige gebogene Federplatte besitzt zwei im Betriebszustand etwa parallele Platten mit Aussparungen zum Durchlaß der zu verbindenden röhrenförmigen Elemente.Such a joint clip is known from FR-A-1 581 182. This joint clamp consists of three parts, namely a U-shaped spring plate and two removable lever arms for opening the spring plate. The U-shaped curved spring plate has two plates which are approximately parallel in the operating state and have cutouts for the passage of the tubular elements to be connected.
  • Bei dieser Schliffklammer wird die Federkraft durch die U-förmige Krümmung des plattenförmigen Bauteils erzielt. Diese Federkraft muß unter Berücksichtigung der Gesamtkonstruktion dieser Klammer recht groß sein, so daß die (abnehmbaren) Griffe zum Öffnen der Klammer beim Aufschieben bzw. Abziehen notwendig sind.With this joint clamp, the spring force is achieved through the U-shaped curvature of the plate-shaped component. This spring force must be quite large considering the overall construction of this clip, so that the (removable) handles for opening the clip when pushing or pulling are necessary.
  • Durch die plattenförmige Ausbildung des Klammerteils sind die Klammerarme in Richtung der Ebene der Aussparung zum Einschub der zu verbindenden röhrenförmigen Elemente nicht flexibel. Dieses korrespondiert damit, daß die Aussparung U-förmigen Querschnitt aufweist, so daß das röhrenförmige Element ohne Aufspreizung in der Ebene der Öffnung eingeschoben werden kann.Due to the plate-like design of the clamp part, the clamp arms are not flexible in the direction of the plane of the recess for inserting the tubular elements to be connected. This corresponds to the fact that the recess has a U-shaped cross-section, so that the tubular element can be inserted without spreading in the plane of the opening.
  • Aufgrund dieser Konstruktion ist die Einwirkung der Bandfederkraft auf die zu verbindenden Schliffteile etwa halbkreisförmig und ungleichmäßig, mit abnehmender Krafteinwirkung bei zunehmendem Abstand von der U-förmigen Verbiegung.Due to this construction, the action of the band spring force on the ground joint parts to be connected is approximately semicircular and uneven, with decreasing force action as the distance from the U-shaped bend increases.
  • Nachteilig an dieser Vorrichtung ist es, daß sie, wie zuvor ausgeführt, dreiteilig sein muß, wodurch sie als einfacher Gebrauchsgegenstand unverhältnismäßig aufwendig herzustellen ist. Der hieraus folgende große Materialaufwand ist ebenfalls nachteilig. Aber auch Handhabung und Lagerung dieser Schliffklammer sind erschwert. Schließlich ist es nachteilig, daß die Krafteinwirkung auf die zu verbindenden Schliffteile ungleichmäßig ist, woraus ungleichmäßiges Verschließen oder Verkanten der Schliffteile folgen kann.The disadvantage of this device is that, as stated above, it must be in three parts, which makes it disproportionately expensive to manufacture as a simple commodity. The resulting large amount of material is also disadvantageous. Handling and storage of this joint clamp are also difficult. Finally, it is disadvantageous that the force acting on the ground parts to be connected is uneven, which can result in uneven closing or tilting of the ground parts.
  • Aufgabe der vorliegenden Erfindung ist es, eine Schliffklammer zur Verfügung zu stellen, die die im Stand der Technik aufgezeigten Nachteile überwindet.The object of the present invention is to provide a joint clamp which overcomes the disadvantages shown in the prior art.
  • Diese Aufgabe wird durch die erfindungsgemäße Vorrichtung durch die kennzeichnenden Merkmale des Hauptanspruchs gelöst. Die Unteransprüche 2 bis 7 sind weitere vorteilhafte Ausgestaltungen der Erfindung.This object is achieved by the device according to the invention by the characterizing features of the main claim. Subclaims 2 to 7 are further advantageous refinements of the invention.
  • Die besonderen vorteilhaften Eigenschaften der erfindungsgemäßen Vorrichtung bestehen insbesondere auch darin, daß die Klammerarme nicht wie im bisherigen Stand der Technik plattenförmig sondern als Ringe ausgebildet sind, so daß Flexibilität in der Ebene der Aussparung zum Durchlaß für die zu verbindenden röhrenförmigen Elemente gegeben ist, wodurch wiederum die Aussparung auf etwa ein Drittel des Kreisumfanges zurückgenommen werden kann, wodurch gleichzeitig die Krafteinwirkung der erfindungsgemäßen Schliffklammer gleichförmig um den Schliff herum verteilt werden kann.The special advantageous properties of the device according to the invention also consist in particular in that the clamp arms are not plate-shaped, as in the prior art, but are designed as rings, so that there is flexibility in the plane of the recess for passage for the tubular elements to be connected, which in turn the recess can be reduced to approximately a third of the circumference of the circle, whereby the force of the joint clamp according to the invention can be distributed uniformly around the joint at the same time.
  • Die erfindungsgemäße Schliffklammer ist aber nicht nur in der Ebene der Durchlaßöffnung elastisch, sondern durch die Ausbildung der Verbindung der Ringe durch mehrere Bögen nuch in besonderer Weise in axialer Richtung elastisch: Diese Elastizität bedingt, daß sich die übereinander angeordneten Ringe elastisch, praktisch parallel gegeneinander bewegen können, so daß Griffe o. ä. nicht nötig sind.The joint clamp according to the invention is not only elastic in the plane of the passage opening, but also elastic in a special way in the axial direction due to the formation of the connection of the rings by several arches: this elasticity means that the rings arranged one above the other move elastically, practically parallel to one another can, so that handles or the like are not necessary.
  • Die erfindungsgemäße Schliffklammer kann sehr leicht über die zu verbindenden Schliffe geschoben und von diesen wieder abgezogen werden; eine Beschädigung des Glases kann bei der bevorzugten Verwendung von Kunststoff nicht auftreten; ein Verbiegen der erfindungsgemäßen Schliffklammer ist ebenfalls nicht möglich.The ground joint clip according to the invention can be pushed very easily over the ground joints to be connected and can be pulled off again; Damage to the glass cannot occur with the preferred use of plastic; it is also not possible to bend the joint clamp according to the invention.
  • Gleichzeitig weisen sie gute Chemiekalienbeständigkeit und keinerlei Korrosion auf. Ein weiterer wesentlicher Vorteil besteht darin, daß sie auf Grund des erfindungsgemäßen Aufbaus ohne weiteres einstückig und in ansich bekannterweise einstufig hergestellt werden können.At the same time, they have good chemical resistance and no corrosion. Another significant advantage is that, due to the construction according to the invention, they can be easily produced in one piece and in a known manner in one step.
  • Die Erfindung wird anhand der folgenden Figuren 1 bis 3 näher erläutert:
    • Fig. 1 zeigt die Draufsicht auf den oberen kleineren Ring (1)
    • Fig. 2 zeigt eine Seitenansicht der erfindungsgemäßen Vorrichtung
    • Fig. 3 zeigt eine Draufsicht auf den unteren größeren Ring (2).
    The invention is explained in more detail with reference to the following FIGS. 1 to 3:
    • Fig. 1 shows the top view of the upper smaller ring (1)
    • Fig. 2 shows a side view of the device according to the invention
    • Fig. 3 shows a plan view of the lower larger ring (2).
  • Gemäß Fig. 1 weist der ringförmige Klammerarm (1) eine Öffnung (3) auf, die für den Einschub des Kerns vorgesehen ist. Diese Öffnung wird vorzugsweise durch Aussparung etwa 1/3 des Kreisumfanges erzielt. Innenliegend im Klammerarm sind Nocken 6 und Nuten 7 ausgebildet, wobei die Auflagefläche des Ringes auf der erhitzten Glasoberfläche möglichst gering gehalten wird, wodurch wiederum eine Erwärmung des Kunststoffes und damit eine mögliche Erweichung des thermoplastischen Materials gering ist. Durch die Nuten (7) kann die vom erhitzten Glas abgestrahlte Wärme, sowie die von unten nach oben steigende heiße Luft, nach oben entweichen, wodurch eine Luftzirkulation auftritt, die einen Hitzestau an den Ringen im Schliffklammernbereich verhindert. Ferner wird durch die bei den Nuten dünnere Wandstärke des Ringes die Flexibilität erhöht, wodurch ein leichtes Auf- und Absetzen der Klammern ermöglicht wird.1, the annular clamp arm (1) has an opening (3) which is provided for the insertion of the core. This opening is preferably achieved by recessing about 1/3 of the circumference. Cams 6 and grooves 7 are formed inside the clamp arm, the contact area of the ring on the heated glass surface being kept as small as possible, which in turn means that heating of the plastic and thus possible softening of the thermoplastic material is small. Through the grooves (7), the heat radiated by the heated glass, as well as the hot air rising from the bottom upwards, can escape upwards, as a result of which air circulation occurs, which prevents heat build-up on the rings in the joint clamp area. Furthermore, the thinner wall thickness of the ring increases the flexibility, making it easy to put the clips on and take them off.
  • Als Material kann jeder Kunststoff verwendet werden, der eine ausreichend hohe Temperaturbeständigkeit, vorzugsweise von mindestens 150° C, und einen hohen Elastizitätsmudul besitzt. Geeignete Materialien sind Polyoxymethylene (POM), Polyamide (PA), Polycarbonate (PC), Polyester (PBTP, PETP), Polyphenylenoxide (PPO), Polysulfone und Polyätherimide. Besonders bevorzugt wird Polyoxymethylen, beispielsweise das Produkt, daß von der Firma Dupont unter dem Namen "Delrin" mit einem Schmelzpunkt von 175°C vertrieben wird, weil dieses Produkt eine außerordentliche gute Kombination von Temperaturstabilität und Eigenelastizität besitzt.Any plastic that has a sufficiently high temperature resistance, preferably at least 150 ° C., and a high modulus of elasticity can be used as the material. Suitable materials are polyoxymethylenes (POM), polyamides (PA), polycarbonates (PC), polyesters (PBTP, PETP), polyphenylene oxides (PPO), polysulfones and polyetherimides. Polyoxymethylene is particularly preferred, for example the product that is sold by Dupont under the name "Delrin" with a melting point of 175 ° C., because this product has an extraordinarily good combination of temperature stability and inherent elasticity.
  • An dem ringförmige Klammerarm 1 sind bogenförmige Ansätze 5 angeformt, die den unteren Ring 2 mit dem darüberliegenden Klammerarm verbinden. Bevorzugt werden drei Bögen 5 angeformt und in einem Winkelbereich von etwa 120° gleichmäßig über den Klammerarm verteilt.Arc-shaped lugs 5 are formed on the ring-shaped clamp arm 1 and connect the lower ring 2 to the clamp arm above it. Three arches 5 are preferably formed and distributed uniformly over the clamp arm in an angular range of approximately 120 °.
  • In Fig. 2 wird aufgezeigt, wie der obere kleinere Klammerarm 1 über die Bögen 5 mit dem unteren größeren Klammerarm 2 verbunden ist. An den Außenwandungen der Klammerarme befinden sich senkrechte Rillen (8) oder ähnliche Vorkehrungen, um die Griffestigkeit der Vorrichtung zu erhöhen.2 shows how the upper, smaller clamp arm 1 is connected to the lower, larger clamp arm 2 via the arches 5. There are vertical grooves (8) or similar measures on the outer walls of the clamp arms in order to increase the grip of the device.
  • In Fig. 3 werden in der Draufsicht auf den unteren Klammern 2 mit der Öffnung 4 die im übrigen gleichen Bezugszeichen gemäß Fig. 1 verwendet.In FIG. 3, in the top view of the lower brackets 2 with the opening 4, the same reference numerals as in FIG. 1 are used.
  • Bei der bestimmungsgemäßen Verwendung der erfindungsgemäßen Vorrichtung umschließt der obere, kleinere ringförmige Klammerarm den Hals des Kerns, wobei der untere größere ringförmige Klammerarm die Hülse umgreift, und durch die elastische Spannung der Verbindungsbögen (5) der feste Verschluß herbeigeführt wird.When the device according to the invention is used as intended, the upper, smaller, annular clamp arm encloses the neck of the core, the lower, larger, annular clamp arm encompassing the sleeve, and the tight closure is brought about by the elastic tension of the connecting bends (5).

Claims (7)

1. Ground clamp for holding together the core and the neck of ground glass parts, in which the clamp arms are arranged concentrically relative to one another and each has an opening to admit the tubular elements which are to be connected, and wherein they are arcuately connected together in one piece, characterized in that the clamp arms are formed as flexible rings (1, 2), the opening (4) is approximately one third of the circumference of the ring; and the arcuate connection of the clamp arms is ensured by two or more arcuate extensions (5), which are distributed between the rings in equal sectors.
2. Ground clamp according to claim 1, characterized in that the diameter of the upper ring (1) is somewhat smaller than the diameter of the lower ring (2).
3. Ground clamp according to at least one of the preceding claims, characterised in that both rings (1 + 2) have projections (6) and notches (7) on the inside.
4. Ground clamp according to at least one of the preceding claims, characterised in that the two rings (1 + 2) have vertical grooves on the outside for non-slip handling.
5. Ground clamp according to at least one of the preceding claims, characterised in that it consists of a synthetic material having sufficient temperature stability of at least about 150 C and a high elasticity modulus.
6. Ground clamp according to at least one of the preceding claims, characterised in that it consists of polyoxymethylene having a melting range from 165°C - 1750C.
7. Ground clamp according to at least one of claims 1 to 5, characterized in that it consists of steel sheet, which has a coating of heat resistant synthetic material.
EP82108835A 1981-10-06 1982-09-23 Device for retaining a ground glass insert on a ground glass neck portion Expired EP0076440B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH6405/81 1981-10-06
CH6405/81A CH647732A5 (en) 1981-10-06 1981-10-06 DEVICE FOR TOGETHER THE CORE AND THE SLEEVE OF GLASS ground.

Publications (3)

Publication Number Publication Date
EP0076440A2 EP0076440A2 (en) 1983-04-13
EP0076440A3 EP0076440A3 (en) 1984-12-05
EP0076440B1 true EP0076440B1 (en) 1989-04-19

Family

ID=4309060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108835A Expired EP0076440B1 (en) 1981-10-06 1982-09-23 Device for retaining a ground glass insert on a ground glass neck portion

Country Status (6)

Country Link
US (1) US4442572A (en)
EP (1) EP0076440B1 (en)
JP (1) JPH0510522B2 (en)
CH (1) CH647732A5 (en)
DE (1) DE3279622D1 (en)
ES (1) ES277022Y (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901512A1 (en) * 1989-01-19 1990-07-26 Stiller Kunststofftechnik Und DEVICE FOR HOLDING TWO TUBE ENDS
CA2135706C (en) * 1993-11-15 1999-06-15 Walter E. Cover Retractable-needle cannula insertion set with refinements to better control leakage, retraction speed, and reuse
US6328347B1 (en) 1999-09-22 2001-12-11 Lsi Logic Corporation Uniform axial loading ground glass joint clamp
US20060088369A1 (en) * 2004-10-22 2006-04-27 Ping-Ling Wang Extendible rod locking sleeve structure
US10264736B2 (en) 2013-12-09 2019-04-23 Thriving Systems Design, Llc Radially slotted annular coupling system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453669A (en) * 1946-06-19 1948-11-09 Able Scient Glass Apparatus Co Glass tubing joint
US2615238A (en) * 1948-01-26 1952-10-28 Highwood William Tank clamp support holder
US2924809A (en) * 1957-05-13 1960-02-09 Northrop Corp Transistor clip
US3543355A (en) * 1968-07-05 1970-12-01 Charles A Wyckoff Connector for tubular golf club bag separators
FR1581182A (en) * 1968-08-02 1969-09-12
AU3355871A (en) * 1970-09-17 1973-03-22 Ato Inc Quick clamp
US3683462A (en) * 1970-12-28 1972-08-15 Gunter Voigt Holding clips
GB1461606A (en) * 1973-03-30 1977-01-13 Jonsson N G Couplings
US4110942A (en) * 1977-05-06 1978-09-05 Slocomb Jr Leon F Window frame manufacture

Also Published As

Publication number Publication date
ES277022Y (en) 1985-02-01
CH647732A5 (en) 1985-02-15
ES277022U (en) 1984-07-16
EP0076440A2 (en) 1983-04-13
EP0076440A3 (en) 1984-12-05
DE3279622D1 (en) 1989-05-24
US4442572A (en) 1984-04-17
JPH0510522B2 (en) 1993-02-10
JPS5872706A (en) 1983-04-30

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