US3699997A - Automated vacuum port - Google Patents

Automated vacuum port Download PDF

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Publication number
US3699997A
US3699997A US3699997DA US3699997A US 3699997 A US3699997 A US 3699997A US 3699997D A US3699997D A US 3699997DA US 3699997 A US3699997 A US 3699997A
Authority
US
United States
Prior art keywords
port
chamber
probe
lever
roughing
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 - Lifetime
Application number
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English (en)
Inventor
William P Kruger
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Application granted granted Critical
Publication of US3699997A publication Critical patent/US3699997A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/612—Tapping a pipe, keg, or apertured tank under pressure
    • Y10T137/613—With valved closure or bung

Definitions

  • the stop is released, and a valve between the chamber and the second coaxial port is opened upon evacuation of the chamber.
  • the probe can then be inserted into the vacuum system connected to the second coaxial port.
  • the valve on the second coaxial port is closed by a spring, and then the valve on the roughing port is closed by a spring,
  • the chamber returns to atmospheric pressure, which aids in closing both valves tightly.
  • the second method while it overcomes some of the limitations of the first method, is extremely expensive. These limitations of the first two methods can be overcome by the third. However, the third method is usually susceptible to human error since the valves must be operated in the proper sequence to avoid contaminating the vacuum system.
  • the present invention is an improved version of the third method.
  • the appropriate valves open and close automatically in response to insertion or removal of a probe containing the material or instrument to be transferred to the vacuum system.
  • the automatic operation of the apparatus minimizes the opportunity for human error and consequent vacuum system malfunction while it shortens significantly the time required to transfer material or instruments into orout of the vacuum system.
  • the automated vacuum port apparatus comprises an evacuable chamber with three ports attached to it.
  • the first and second ports are coaxial and at opposite ends of the chamber so that the probe can be inserted through the chamber into the vacuum system.
  • the third port is connected to a roughing pump.
  • the probe When the probe is inserted through the first port, it actuates a mechanism which opens a door-like valve on the third port to evacuate the chamber. Further insertion of the probe is prevented by a stop until the pressure in the chamber reachesa predetermined level. When the predetermined pressure is reached, further insertion of I the probe actuates a mechanism which opens another door-like valve on the second port and permits the probe to pass into the vacuum system.
  • a chamber is formed by a bottom plate 12 and a housing 14 with a seal 11 between them.
  • Coaxial ports 16 and 18 are situated in opposite sides of housing 14 about axis 15.
  • a port 20, situated in the top of housing 14, is connected to a "vacuum roughing pump (not shown).
  • Port 18 is attached to a vacuum system 22.
  • a probe 24 is shown inserted into port 16; an O-ring 26 in a groove 28 forms a vacuum tight seal between port 16 and probe 24.
  • Probe 24 may be used for transferring many different materials or instruments into vacuum system 22, such as solid, liquid, or gaseous samples; arnpoules; photographic plates; radioactive materials; and ionization chambers.
  • valve 50 When the pressure in chamber 10 drops to approximately thepressure in port 18, the seating force on valve 50 is reduced to the force of spring 56. That force is low enough to allow probe 24 to rotate lever 38, as shown by arrow 58, while the probe is inserted further into chamber 10. As lever 38 rotates it opens valve 50,
  • probe 24 passes through port 18'int0 vacuum system 22.
  • a groove 62 in port 18 containing an O-ring 64 makes a seal with probe 24, greatly reducing diffusion of air from chamber 10 into vacuum system 22.
  • valve 50 Upon removal of probe 24 from vacuum system 22, valve 50 will be closed by spring 56 when the end of the probe moves past lever 38.
  • the loose mounting of plate 44 on spools 48 allows O-ring'46 to seat squarely against the end of port 18 even with the low seating force applied by spring 56.
  • a spring 66 closes valve 37, disconnecting the roughing pump from chamber 10. Air will then fill chamber 10 as the probe is moved past O-ring 26, and the air pressure will'aid springs 56 and 66 in closing valves 50 and 37 securely.
  • a vacuum port apparatus comprising:
  • first and second ports on the chamber for receiving a probe, the first and second ports each having seal means for making a vacuum tight seal with the probe;
  • a roughing port on the chamber connected to a vacuum pump
  • first valve means for opening a passage between the chamber and the roughing port for evacuating the chamber in response to insertion of the probe through the first port;
  • stop means for inhibiting further insertion of the probe into the chamber until the pressure in the chamber reaches a predetermined value
  • second valve means for opening apassage between the chamber and second port in response to further insertion of the probe after the chamber reaches the predetermined pressure to permit the probe to pass through the second port.
  • the second valve means closes the passage between the chamber and the second port in response to withdrawal of the probe from the chamber
  • the first valve means closes the passage between the chamber and the roughing port in response to withdrawal of the probe from the first port.
  • a vacuum port apparatus as in claim 2 wherein the first valve means comprises:
  • a spring attached to a second end of the lever and to a fixed portion of the chamber to force the seal against the roughing port for closing the passage between the chamber and the roughing port;
  • a vacuum port apparatus as in claim 2 wherein the second valve means comprises:
  • a swivel plate pivoted within the chamber
  • a spring attached to the swivel plate and to another fixed portion of the chamber to force the seal against the second port for closing the passage between the chamber and the second port;

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Vacuum Packaging (AREA)
  • Physical Vapour Deposition (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Measuring Fluid Pressure (AREA)
US3699997D 1971-06-22 1971-06-22 Automated vacuum port Expired - Lifetime US3699997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15544671A 1971-06-22 1971-06-22

Publications (1)

Publication Number Publication Date
US3699997A true US3699997A (en) 1972-10-24

Family

ID=22555465

Family Applications (1)

Application Number Title Priority Date Filing Date
US3699997D Expired - Lifetime US3699997A (en) 1971-06-22 1971-06-22 Automated vacuum port

Country Status (4)

Country Link
US (1) US3699997A (cs)
DE (1) DE2229384C3 (cs)
FR (1) FR2143284A1 (cs)
GB (1) GB1347607A (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD730417S1 (en) * 2013-06-06 2015-05-26 Stolle Machinery Company, Llc Vacuum port
EP2932149A4 (en) * 2012-12-17 2016-10-05 Westport Power Inc METHOD AND APPARATUS FOR MAINTENANCE OF A TANK, A CAP, OR A TANK AND A CAP

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116328452B (zh) * 2023-05-29 2023-08-08 通威微电子有限公司 一种净化除尘设备

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2932149A4 (en) * 2012-12-17 2016-10-05 Westport Power Inc METHOD AND APPARATUS FOR MAINTENANCE OF A TANK, A CAP, OR A TANK AND A CAP
USD730417S1 (en) * 2013-06-06 2015-05-26 Stolle Machinery Company, Llc Vacuum port
USD761892S1 (en) * 2013-06-06 2016-07-19 Stolle Machinery Company, Llc Vacuum port

Also Published As

Publication number Publication date
DE2229384B2 (de) 1973-10-18
FR2143284A1 (cs) 1973-02-02
DE2229384C3 (de) 1974-05-16
GB1347607A (en) 1974-02-27
DE2229384A1 (de) 1972-12-28

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