DE4210578A1 - Air pump and shock absorber piston - has ring seal which slides in tapered groove - Google Patents

Air pump and shock absorber piston - has ring seal which slides in tapered groove

Info

Publication number
DE4210578A1
DE4210578A1 DE19924210578 DE4210578A DE4210578A1 DE 4210578 A1 DE4210578 A1 DE 4210578A1 DE 19924210578 DE19924210578 DE 19924210578 DE 4210578 A DE4210578 A DE 4210578A DE 4210578 A1 DE4210578 A1 DE 4210578A1
Authority
DE
Germany
Prior art keywords
piston
ring seal
ring
webs
slides
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.)
Ceased
Application number
DE19924210578
Other languages
German (de)
Inventor
Karl Liedgens
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to DE19924210578 priority Critical patent/DE4210578A1/en
Publication of DE4210578A1 publication Critical patent/DE4210578A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

A piston (1) has an O-ring seal (3) set into an axially tapered groove (2). During the compression stroke the diameter of the O ring (3) increases to achieve a seal, while the diameter is reduced as the piston returns. The flange (6) contacted by the seal (3) during the return stroke is webbed, grooved or studded. ADVANTAGE - The piston can be made from a single casting.

Description

Die Erfindung betrifft einen einstückig ausgebildeten Kolben, dessen Dichtung durch einen O-Ring gebildet wird, der in einer in achsialer Richtung konischen Nute geführt ist, derart, daß die beiden Flächen der Kolbennute einen etwa doppelten Abstand der O-Ringstärke bilden, wodurch der O-Ring beim Kompressions- und Rückhub auf dem konischen In­ nendurchmesser zwischen den beiden Flächen um das Abstandmaß gleiten kann.The invention relates to a one-piece piston, the Seal is formed by an O-ring in an axial Is guided towards the conical groove, such that the two surfaces the piston groove form approximately twice the distance of the O-ring thickness, whereby the O-ring during the compression and return stroke on the conical In Slide the diameter between the two surfaces by the distance can.

Hierbei wird beim Kompressionshub der Durchmesser des O-Ringes vergrö­ ßert und die dichtende Wirkung zwischen Kolben und Zylinderwand erreicht. Analog dazu verkleinert sich der Durchmesser des O-Ringes sofort beim Gegenhub des Kolbens.The diameter of the O-ring is increased during the compression stroke eats and achieves the sealing effect between the piston and cylinder wall. Similarly, the diameter of the O-ring is immediately reduced when Counter stroke of the piston.

Um beim Rückhub freies Durchströmen des zu komprimierenden Mediums zu sichern, ist es vorteilhaft, die dann als Anlage wirkende Fläche des Kolbens mit Stegen, Nuten, Noppen oder Einschnitten auszubilden. Im Anwendungsbeispiel des erfindungsgemäßen Kolbens bei Luftpumpen ist die den O-Ring beim Komprimieren stützende Fläche glatt ausgebildet.In order to ensure free flow of the medium to be compressed during the return stroke secure, it is advantageous to then act as an area of the Design pistons with webs, grooves, knobs or cuts. In the application example of the piston according to the invention in air pumps the surface supporting the O-ring during compression is smooth.

Im Anwendungsbeispiel des vorbeschriebenen Kolbens bei Türschließdämpfern wird zur Erzielung einer zuerst als Kompression, dann während desselben Hubes in Dekompression übergehenden Funktion bei der oben beschriebenen Kolbengestaltung die den O-Ring stützende Fläche mit einem oder mehreren kleinen radialen Stegen ausgebildet, derart, daß bei normalem Türschlie­ ßen eine kaum spürbare Kompression wegen nicht voller Anlage des O-Ringes auf der Stützfläche entsteht. Dagegen wird bei heftigem Schließen der Tür der O-Ring fast dicht über die Stege gepreßt, wodurch die Dämpfung re­ lativ zur Heftigkeit des Türschließens abläuft.In the application example of the piston described above for door closers is used to achieve compression first, then during it Hubes decompression function in the above Piston design the surface supporting the O-ring with one or more small radial webs formed, such that with normal door closing barely noticeable compression due to the O-ring not being fully seated arises on the support surface. In contrast, if the door is closed violently the O-ring is pressed almost tightly over the webs, causing the damping right relative to the force of the door closing.

Diese Ausführung stellt eine wesentliche Verbesserung der in eigener Pa­ tentanmeldung P 57 29 597.7 beschriebenen Ausführung eines Türschließdäm­ pfers dar, bei dem Kompression und Entspannung durch einen im Zylinderge­ häuse befestigten im Durchmesser unterschiedlich ausgebildeten, mittig durch den Kolben gleitenden Bolzen bewirkt wird.This version represents a significant improvement in the own Pa tent registration P 57 29 597.7 described execution of a door lock dam pfer represents compression and relaxation by a cylinder housing fastened in the middle, differently designed in diameter is caused by the piston sliding pin.

Gegenüber anderen bekannten Ausführungen von Pumpen, deren Kolben aus meh­ reren Teilen besteht, kann der erfindungsgemäße Kolben einstückig zum Beispiel im Spritz- oder Druckgußverfahren hergestellt werden.Compared to other known versions of pumps, the pistons of meh reren parts, the piston according to the invention can be made in one piece Example can be produced by injection molding or die casting.

In Fig. 1 ist dargestellt der erfindungsgemäß ausgebildete Kolben (1) mit in achsialer Richtung konischen Nute (2) für O-Ringdichtung (3) die bei Kompression in dichtende und beim Rückhub in durchlässige Position gleitet.In Fig. 1 the piston ( 1 ) designed according to the invention is shown with an axially conical groove ( 2 ) for O-ring seal ( 3 ) which slides in the sealing position during compression and in the permeable position during the return stroke.

Die Nute (2) bat für diese Gleitbewegung eine etwa doppelte Breite der O-Ringstärke.The groove ( 2 ) asked for this sliding movement to be approximately twice the width of the O-ring thickness.

Bei der Anwendung des vorbeschriebenen Kolbens (1) in z. B. Luftpumpen ist der bei Kompression die O-Ringdichtung stützende Flansch (4) glatt ausgebildet, während der gegenüberliegende beim Rückhub stützende Flansch (6) zum Luftdurchlassen Stege, Nuten oder Noppen (5) aufweist.When using the piston ( 1 ) described above in z. B. Air pumps, the flange ( 4 ) supporting the O-ring seal during compression is smooth, while the opposite flange supporting the return stroke ( 6 ) for air passage has webs, grooves or knobs ( 5 ).

In Fig. 2 ist der erfindungsgemäße Kolben (1) zur Verwendung in z. B. einem Türschließdämpfer dargestellt, derart, daß der die Kompression stützende Flansch (4) mit einem oder mehreren radialen Stegen oder Nuten (7) ausgebildet ist, an die während der Kompression die O-Ringdichtung (3) je nach Heftigkeit des Türschließens mehr oder weniger fest ange­ preßt wird.In Fig. 2 the piston ( 1 ) according to the invention for use in z. B. a door closing damper, such that the compression-supporting flange ( 4 ) is formed with one or more radial webs or grooves ( 7 ) to which the O-ring seal ( 3 ) during compression, depending on the severity of the door closing more or is pressed less firmly.

Dabei werden die zwischen den Stegen (7) ausgebildeten Schlitze (8) rela­ tiv zur Heftigkeit des Türschließens verkleinert und das Entweichen der komprimierten Luft entsprechend gesteuert.The slots ( 8 ) formed between the webs ( 7 ) are rela tively reduced to the force of the door closing and the escape of the compressed air is controlled accordingly.

Eine bleibende Verformung des O-Ringes (3) kann nicht auftreten, da die bei Kompression entstehende Verformung nur im Moment des Türschließens auftritt und sofort danach der O-Ring (3) völlig entspannt ist.Permanent deformation of the O-ring ( 3 ) cannot occur, since the deformation that occurs during compression only occurs when the door is closed and the O-ring ( 3 ) is completely relaxed immediately afterwards.

Ein wesentlicher Vorteil gegenüber anderen bekannten Türschließdämpfern ist der Wegfall von vorgesteuerten Ventilen und Einstellschrauben.A major advantage over other known door closers is the elimination of pilot operated valves and adjusting screws.

Claims (3)

1. Pumpenkolben (1) mit O-Ringdichtung (5) die in einer in achsialer Richtung konischen Nute (1) mit Spiel in Richtung Kolbenbewegung so gelagert ist, daß bei Kompressionshub des Kolbens (1) die O-Ringdich­ tung (3) zum größeren Durchmesser dichtend und beim Gegenhub zum klei­ neren Durchmesser der Nute (2) gleitend frei wird zum Durchlaß des zu pumpenden Mediums. Der beim Rückhub als Anlage der O-Ringdichtung (3) dienende Flansch (6) ist mit Stegen, Nuten oder Noppen (7) ausgebildet.1. Pump piston ( 1 ) with O-ring seal ( 5 ) which is mounted in an axial conical groove ( 1 ) with play in the direction of piston movement so that the compression stroke of the piston ( 1 ), the O-ring device ( 3 ) Sealing larger diameter and on the counter stroke to the smaller diameter of the groove ( 2 ) is sliding freely for passage of the medium to be pumped. The flange ( 6 ) which serves as a system for the O-ring seal ( 3 ) during the return stroke is designed with webs, grooves or knobs ( 7 ). 2. Pumpenkolben nach Anspruch 1, dadurch gekennzeichnet, daß der die Druckseite der Kolben (1) bildende Flansch (4) mit einem oder mehreren radialen Stegen oder Nuten (7) ausgebildet ist, die bei Anwerdung des Kolbens (1) z. B. einem Türschließdämpfer relativ zur Schließgeschwin­ digkeit der Tür durch unterschiedlich starke Verformung der O-Ringdich­ tung (3) bei Pressung auf die Stege (7) entsprechend größere oder klei­ nere Entlüftungsschlitze (8) freiläßt.2. Pump piston according to claim 1, characterized in that the pressure side of the piston ( 1 ) forming flange ( 4 ) is formed with one or more radial webs or grooves ( 7 ) which, when the piston ( 1 ) is used, for. B. a door closer relative to the closing speed of the door by different degrees of deformation of the O-ring seal device ( 3 ) when pressed on the webs ( 7 ) correspondingly larger or smaller openings vents ( 8 ). 3. Pumpenkolben nach Anspruch 1 und 2, einstückig hergestellt dadurch ge­ kennzeichnet, daß die Herstellung im Spritz- oder Druckgußverfahren ohne jede Nacharbeit erfolgen kann.3. Pump piston according to claim 1 and 2, made in one piece thereby ge indicates that the production by injection or die casting without any rework can be done.
DE19924210578 1992-03-31 1992-03-31 Air pump and shock absorber piston - has ring seal which slides in tapered groove Ceased DE4210578A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924210578 DE4210578A1 (en) 1992-03-31 1992-03-31 Air pump and shock absorber piston - has ring seal which slides in tapered groove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924210578 DE4210578A1 (en) 1992-03-31 1992-03-31 Air pump and shock absorber piston - has ring seal which slides in tapered groove

Publications (1)

Publication Number Publication Date
DE4210578A1 true DE4210578A1 (en) 1992-07-30

Family

ID=6455551

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924210578 Ceased DE4210578A1 (en) 1992-03-31 1992-03-31 Air pump and shock absorber piston - has ring seal which slides in tapered groove

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DE (1) DE4210578A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003031850A1 (en) * 2001-10-05 2003-04-17 Bereznai Jozsef Piston structure and liquid feeder valve
DE10233894B4 (en) * 2001-07-26 2004-12-09 Kabushiki Kaisha Toyota Jidoshokki, Kariya Piston machine with variable delivery rate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1832907U (en) * 1961-03-18 1961-06-15 Georg Fritz AIR PUMP FOR PNEUMATIC TANK CONTENT MEASURING DEVICE.
DE1198003B (en) * 1962-04-13 1965-08-05 Karl Scheffer Klute Hand or foot air pump
DE3729597A1 (en) * 1987-09-04 1989-03-16 Karl Liedgens Door-closing damper
EP0312597A1 (en) * 1987-04-21 1989-04-26 Proizvodstvennoe Obiedinenie 'zavod Imeni M.I.Kalinina' Piston of volume displacement machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1832907U (en) * 1961-03-18 1961-06-15 Georg Fritz AIR PUMP FOR PNEUMATIC TANK CONTENT MEASURING DEVICE.
DE1198003B (en) * 1962-04-13 1965-08-05 Karl Scheffer Klute Hand or foot air pump
EP0312597A1 (en) * 1987-04-21 1989-04-26 Proizvodstvennoe Obiedinenie 'zavod Imeni M.I.Kalinina' Piston of volume displacement machine
DE3729597A1 (en) * 1987-09-04 1989-03-16 Karl Liedgens Door-closing damper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233894B4 (en) * 2001-07-26 2004-12-09 Kabushiki Kaisha Toyota Jidoshokki, Kariya Piston machine with variable delivery rate
WO2003031850A1 (en) * 2001-10-05 2003-04-17 Bereznai Jozsef Piston structure and liquid feeder valve
US7175154B2 (en) 2001-10-05 2007-02-13 Bereznai Jozsef Piston structure and liquid feeder valve
CN100422606C (en) * 2001-10-05 2008-10-01 贝利知识产权公司 Piston structure and liquid feeder valve
AU2002329505B2 (en) * 2001-10-05 2009-02-05 Bery Intellectual Properties Szellemi Tulajdonjogokat Hasznosito Es Kezelo Korlatolt Felelossegu Tarsasag Piston structure and liquid feeder valve

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licenses declared
8131 Rejection