US3701432A - Articulated connector - Google Patents

Articulated connector Download PDF

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Publication number
US3701432A
US3701432A US194168A US3701432DA US3701432A US 3701432 A US3701432 A US 3701432A US 194168 A US194168 A US 194168A US 3701432D A US3701432D A US 3701432DA US 3701432 A US3701432 A US 3701432A
Authority
US
United States
Prior art keywords
plugs
spring
pin
springs
bores
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
US194168A
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English (en)
Inventor
William L Schlegel
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.)
Komline Sanderson Engineering Corp
Original Assignee
Komline Sanderson Engineering Corp
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 Komline Sanderson Engineering Corp filed Critical Komline Sanderson Engineering Corp
Application granted granted Critical
Publication of US3701432A publication Critical patent/US3701432A/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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/125—Attachments or mountings where the end coils of the spring engage an axial insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/044—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering
    • B01D33/048—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering with endless filtering bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/16—Belt fasteners
    • Y10T24/1672—Butt connected belt ends

Definitions

  • the adjacent ends of the plugs are formed with relatively opposed shoulders [52] U.S.Cl ..210/401, 24/31 which are spaced apart to define between them a [51] Int. Cl. ".8011! 33/14 Space for reception of inwardly directed terminal ends [58] Field oi Search....ll4l235; 24/31 R, 31 B, 31 C; of the wire filament or filaments forming the coil 210/401, 336; 235/397 spring or springs.
  • the abutting engagement between the similarly directed ends withthe said shoulders [5 R f -gn e Cited prevents removal of the plugs from the springs.
  • the universal interconnection UNITED STATES PATENTS between the plugs is defined by forming the plugs with 1 271 014 7/1918 Bower ..24/31c 'i' aligned hmugh which is mosely l371513 3 H921 Nickerson 24/31 C disposed a rigid pin having sufiicient clearance with 2652927 9/1953 Komline [401 the bores to permit limited angular movement of the l976 10/1971 Hale I' F I plugs in an axial plane of the pin.
  • the ends of the pins 24505l9 10/1948 g l 24/31 are enlarged to retain the plugs thereon and the plugs 1683697 Rankin "24/31 are relatively freely rotatable to release any torsional forces in the spring ends which might tend to laterally displace them by rolling motion on the filter drum or associated rollers.
  • This invention relates to an improved articulated connector for coil springs and is particularly adapted for use in interconnecting the ends of closely wound coil springs to form endless spring elements for use as the components of filter media in rotary drum filters as exemplified in the prior U.S. Pat. Nos. 2,652,927; 2,652,928 and 2,699,260 of T. R. Komline.
  • the filter media is of composite construction consisting of a plurality of generally parallel and contiguous endless coil spring loops of stainless steel moving through an endless circuit around a drum and supplemental rollers of substantially smaller diameter than the drum.
  • each spring loop will include materials and minimum risk of failure of the connector itself.
  • the connector employs a pair of plug members interconnected for relative universal angular movement.
  • the plugs have generally aligned bores therethrough and are interconnected by a rectilinear pin extending through the bores with sufficient clearance to permit limited relative angular movement of the plugs in all axial planes of the pin, the pin having means at its opposite ends for retaining the plugs thereon while permitting said limited relative angular movement as well as .relative normally straight runs between rollers, and between the rollers and the drum, and curved portions passing around the rollers and the drum, and conforming as closely as possible to the curvature of each.
  • Breakage of a single spring of the composite filter media will result in the admission of unfiltered liquid or slurry to the interior of the drum, with resulting contamination of the filtrate.
  • any breakage or failure of a spring which 'occurs will invariably be closely adjacent to one of the said connectors. It is believed that such'failure arises from the fact that when the spring attempts to conform to the curvature of a roller in passing therearound, the rigid connector plug interconnecting adjacent portions of the spring is unable to assume a corresponding curvature. Therefore adjacent the ends of the rigid plug, the wire filament from which the spring is formed, is subjected to a relatively higher degree of bending or twisting than occurs at other locations along the length of the spring. The repeated flexing at the same location is believed to result in a work hardening and crystallizing action which renders the stainless steel spring filament subject to corrosion and which eventually leads to breakage of the spring at the particular location.
  • the present invention comprises an articulated connector or coupling which, when used to interconnect the ends of the coil springs or spring sections incorporated in the filter media, enables the coupled end portions of the springs to conform more closely than heretofore to the curvature of a roll about which the spring is trained, while minimizing any localized bending or twisting of the spring filament as the spring is flexed in passing'on to and moving from each roll and/or the drum.
  • thearticulation of the connector is achieved in such a manner as to subject the latter to minimum wear by abrasive rotary movement of the plugs thereon.
  • FIG. 2 is a greatly enlarged section on the line 2-2 of FIG. 1, showingthe contiguous relationship between the coil springs comprising the filter media in such a conventional filter unit;
  • FIG. 3 is a view, partly in elevation and partly in section, on a greatly enlarged scale, showing the preferred form of articulated connector of this invention, operatively applied to one of the coil springs to interconnect adjoining terminal ends of said spring at a location where the spring is curved for passage around one of the supplemental rolls of a filter unit.
  • the reference numeral 2 designates a conventional filter drum disposed for rotation about a horizontal axis 3 with its lower portionimmersed in a vat 4 of sludge to be filtered. Trained around the drum 2 is a flexible porous filter media conjointly defined by a plurality of endless loops 5 of coil springs.
  • the coil springs 5, in a preferred configuration are arranged in inner and outer layers A and B, respectively, with the inner layer A engaging and extending around the drum and spaced apart a distance somewhat less than the spring diameters.
  • the outer layer B of the springs bridges the space between adjoining springs of the inner layer A and is in contiguous engagement therewith to define a composite filter media M extending completely across the drum for its full axial extent, so that a negative pressure maintained within the drum 2, will cause liquid from the slurry within vat 4, to be sucked through the interstices defined between the closely spaced coils of each spring 5 and between adjoining springs, to be received in suitable drainage channels in the filter drum and carried away in known manner, thereby leaving a filter cake deposited on the exterior surface of the filter media M.
  • Both the inner and outer layer A and B of spring coils extend to and over a first discharge roll 6 to maintain the springs 5 in their contiguous parallel status until such time as they reach the discharge roll 6.
  • the springs of the inner layer A then are guided around the discharge roll 6 to and around a return roll 7, and thence back onto the drum 2.
  • the outer layer B of springs 5 continues past the discharge roll 6 to a second discharge roll 8 and thence 'to and around a second return roll 9 and back on to the drum 2.
  • each spring in passing around the discharge rolls 6 and 8, all locations along each spring are progressively bent around the periphery of each roll in a given direction of curvature. Then in passing around, their return rolls 7 and 9, respectively, are bent or curved inthe opposite direction. This sharp bending or flexing in opposite directions of each spring is repeated throughout the length of each spring, each time it moves through its endless circuit around the drum 2 and associated rolls.
  • each spring 5 is coupled together by a connector which, in the past, has conventionally consisted of a rigid member, often externally threaded, and received within the adjacent ends of the spring. It has been found that when a spring employing such a connector eventually fails, the breakage almost invariably has occurred at or adjacent one of said connectors.
  • the connector of the invention includes a pair of rigid plugs 10-10, respectively, which are formed of a suitable corrosion-resistant rigid material, such as stainless steel.
  • These plugs 10-10 are of identical construction arranged generally in symmetrical aligned relation and proportioned for reception within the ends of a coil spring 5 or springs to be interconnected.
  • the coil spring 5 illustrated fragmentarily in-the drawing is of a conventional construction, being preferably formed of a stainless steel spring wire or filament, wound into contiguous or near contiguous coils 17. It will be understood that a plurality of such coils in parallel contiguous relationship are employed to jointly define a filter media M such as is described in my prior patents aforesaid.
  • the plugs are formed near their relatively adjacent ends with cylindrical portions 12 of appropriate diameter for reception within the end coils of the spring,while the relatively remote end portions 14 of the plugs are formed of relatively reduced diameter, preferably with conical or tapered surfaces which converge away from each other, and which may function as pilots to facilitate insertion of the cylindrical portions 12 into the springs, though the primary function of such tapered portions is to facilitate bending of the springs as hereinafter mentioned.
  • the plugs 10-10 are interconnected by suitable means permitting universal angular movement between them, so that the interconnected end portions of the spring 15 may bend or flex to substantially the same radius or arc of curvature assumed by the spring on opposite sides of the connector. In addition, it is desirable to permit relative rotary movement between the spring ends, for reasons hereinafter appearing.
  • the plugs are formed with normally aligned bores 16 therethrough coaxial to their cylindrical portions 12, and a rigid connecting pin 18 is loosely disposed through these bores with sufficient clearance to permit limited angular movement of the plugs relative to each other and the pin in all axial planes of the pin, as will be apparent by reference to FIG. 3 in which the plugs are shown to be slightly tilted with respect to the pin.
  • the plugs 15-15 are relatively rotatable on the pin 18.
  • the pin 18 may be provided with suitable header means in the form of enlargements 20 and 22, respectively, at its opposite ends.
  • the pin 18 constitutes a generally conventional rivet having a preformed rounded head 20. It will be understood that the plugs 10-10 are assembled onto the pin 18 together with a conventional retaining washer 24, before the end of the pin 18 opposite its head 20 is upset or riveted over in a conventional manner to define the enlargement 22, the external diameter of which is greater than the internal diameter of the adjacent washer 24,
  • relatively adjacent ends of the plugs comprise axially presented shoulders or end surfaces 26-26 which, in the preferred embodiment are of annular configuration and extend in radial planes of the respective plugs. These shoulders 26-26 are adapted for axial abutting engagement withradially inwardly directed terminal ends 29 of the wire filament of the coil spring 15. These inwardly directed terminal ends 29 may readily be formed after the plugs are inserted within the adjacent coil spring ends to be interconnected, as by bending the terminal ends of the coil spring radially inwardly by a pair of pliers or other suitable tool.
  • plugs 10-10 In order to maintain a sufficient spacing between the plugs for easy reception of the inwardly directed terminal ends 29, there are interposed between the plugs 10-10 suitable spacer means, here exemplified by annular collars 30-30 formed integrally with the respective plugs, and concentric to the annular shoulders 26 thereof. As'thus formed, the plugs 10 and their associated spacermeans 30 constitute identical unitary structures, thereby achieving economies in boththe production and assembly of the connectors of the invention.
  • the distance between the enlargements 20 and 22 of the pin '18 is sufficient to permit atleast a limited amount of free axial movement of, the plugs l0so that they may be readily tiltedon the pin 18 without such tilting movement being opposed by abutting relationship between the end faces of their spaces 30-30.
  • each plug is relatively small and preferably only somewhat greater than that of a single coil of the spring with which it is associated, and thus, at most can restrain relative axial tilting as between but two adjacent coils, whereas the remainder of the plug 14 istapered or reduced in diameter, and
  • the pin 18 might be formed as an integral portion of one of the plugs, while the bore 16 in such event would be formed only in the remainingplug.
  • the pin and/or bore in such event might be of conical configuration, if necessary, to achieve the desired extent of angular movement between the two plugs.
  • a filter unit of the type which includes a coil spring having its ends interconnected to form part of an endless filter media guided for movement in an endless path about a large diameter filter drum and a relatively smaller diameter roller; of an articulated connector for said coil spring ends, comprising a pair of plugs proportioned for reception within the respective said spring ends; said plugs being formed with normally aligned bores therethrough; a
  • connecting pin extending through said bores and loosely arranged with sufficient clearance to permit angular movement of said plugs in all axial planes of said pin; the adjacent end portions of said plugs respectively being of cylindrical configuration coaxial with said bores and having abrupt axially presented end surfaces directed toward each other at their adjacent ends; said springs respectively having terminal end portions extending radially inwardly between said end surfaces, said terminal end portions being disconnected from said pin whereby said terminal end portions are the means for axially retaining the springs on said plugs; header means on each end of said pin for loosely retaining said plugs on the pin while permitting a limited degree of relative axial movement between the said plugs; and spacer means between said end surfaces comprising integral axial extensions of the respective end surfaces of said plugs and of substantially smaller diameter than said end surfaces and coaxial to said bores.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Springs (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
US194168A 1971-11-01 1971-11-01 Articulated connector Expired - Lifetime US3701432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19416871A 1971-11-01 1971-11-01

Publications (1)

Publication Number Publication Date
US3701432A true US3701432A (en) 1972-10-31

Family

ID=22716551

Family Applications (1)

Application Number Title Priority Date Filing Date
US194168A Expired - Lifetime US3701432A (en) 1971-11-01 1971-11-01 Articulated connector

Country Status (8)

Country Link
US (1) US3701432A (enExample)
JP (1) JPS4872763A (enExample)
AU (1) AU471793B2 (enExample)
CA (1) CA972689A (enExample)
FR (1) FR2158193B1 (enExample)
GB (1) GB1366561A (enExample)
IT (1) IT965175B (enExample)
NL (1) NL7212585A (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839766A (en) * 1971-06-02 1974-10-08 Dunlop Ltd Conveyor belts
US3918821A (en) * 1974-06-14 1975-11-11 Komline Sanderson Eng Corp Articulated connector
US6123848A (en) * 1997-02-14 2000-09-26 Warner-Jenkinson Company, Inc. Ultrafiltration method for purifying water-insoluble aluminum hydrates

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS583193U (ja) * 1981-06-29 1983-01-10 日本住器工業株式会社 管状部材の連結構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839766A (en) * 1971-06-02 1974-10-08 Dunlop Ltd Conveyor belts
US3918821A (en) * 1974-06-14 1975-11-11 Komline Sanderson Eng Corp Articulated connector
US6123848A (en) * 1997-02-14 2000-09-26 Warner-Jenkinson Company, Inc. Ultrafiltration method for purifying water-insoluble aluminum hydrates

Also Published As

Publication number Publication date
IT965175B (it) 1974-01-31
DE2244896A1 (de) 1973-05-10
JPS4872763A (enExample) 1973-10-01
CA972689A (en) 1975-08-12
FR2158193A1 (enExample) 1973-06-15
FR2158193B1 (enExample) 1977-08-05
AU4602972A (en) 1974-03-07
GB1366561A (en) 1974-09-11
NL7212585A (enExample) 1973-05-03
AU471793B2 (en) 1976-05-06
DE2244896B2 (de) 1977-01-20

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