US3842649A - Rivet setting tool for blind rivets - Google Patents

Rivet setting tool for blind rivets Download PDF

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Publication number
US3842649A
US3842649A US00110912A US11091271A US3842649A US 3842649 A US3842649 A US 3842649A US 00110912 A US00110912 A US 00110912A US 11091271 A US11091271 A US 11091271A US 3842649 A US3842649 A US 3842649A
Authority
US
United States
Prior art keywords
pin
polygonal
disposed
jaws
handle
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
US00110912A
Other languages
English (en)
Inventor
Maio A Di
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.)
Marson Corp
Original Assignee
Marson 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 Marson Corp filed Critical Marson Corp
Priority to US00110912A priority Critical patent/US3842649A/en
Priority to CA132,180A priority patent/CA964239A/en
Priority to GB320372A priority patent/GB1376064A/en
Priority to DE2264780*A priority patent/DE2264780A1/de
Priority to DE7202903U priority patent/DE7202903U/de
Priority to DE2203722A priority patent/DE2203722C3/de
Priority to FR7202833A priority patent/FR2123499B1/fr
Application granted granted Critical
Publication of US3842649A publication Critical patent/US3842649A/en
Priority to JP1977076783U priority patent/JPS5353171Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
    • B21J15/386—Pliers for riveting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • 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
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53717—Annular work
    • Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
    • Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter
    • Y10T29/53761—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter having repositionable annulus engaging tool

Definitions

  • a rivet setting tool for blind rivets which, in construction, includes gripping means for grasping the mandrel of a blind rivet and pulling means coacting with the gripping means for retracting the gripping means to pull the mandrel into the eyelet of the rivet to set same.
  • the tool also includes specially constructed spring means cooperatively engaging the gripping and pulling means which operates to automatically initiate retraction of the pulling means to move the gripping means into contact with the mandrel under a relatively light pressure sufficient to hold the rivet in place relative to the tool.
  • the tool further includes means for actuating the gripping and pulling means which includes a pivotally mounted handle supported by specially constructed means reducing wear and tear on the support structure.
  • a special wearresistant insert for the nose piece of the tool is also disclosed.
  • tubular eyelet with a pre-formed flange mounted on one end and an elongated mandrel slidably disposed within the bore of the eyelet in close fitting relation-. ship.
  • the mandrel has a head at one end which externally abuts the non-flanged end of the eyelet. The other end of the mandrel projects outward of the eyelet beyond it flanged end.
  • the rivet is inserted into registering holes in the plates so that the preformed flange abuts the accessible side of the plates with the eyelet extending through both plates such that its non-flanged end projects beyond the blind or inaccessible side of the plates.
  • the holes in the plates are sized to receive the eyelet by a slip fit.
  • the rivet is set by applying a pulling force to the projecting portion of the mandrel relative to the eyelet thereby drawing the enlarged end of the mandrel into the eyelet. This produces an outward flaring or deformation of the eyelet; the flaring advancing into an opening within the confined spaces. This is an ext-emely advantageous result.
  • the driving portion is offset from the handles. While conventional driving portions are made relatively short, the driving portion of the tool of this invention has a length of at least onefifth of the length of the tool. As a result, a rivet can be set in a deep channel by using the tool as a rivet carrier which is very advantageous.
  • the conventional rivet setting tool for this type of blind rivet generally includes gripping means comprising, typically, a pair of co-acting jaws which grip the mandrel and which exert a pulling force on the mandrel to set the rivet as above described.
  • the tool- also includes actuating means for operating the jaws.
  • the actuating means typically comprises a lever arm generally incorporated. in a handle which constitutes the force application element for operating the jaws.
  • the handle is normally biased in open position with a second fixed handle in spaced relationship therewith.
  • the jaws are also biased in the open position.
  • the jaws are moved to the closed or operable position by squeezing the handles together. This compression of the handles causes the jaws to compress against the mandrel and pull the same.
  • the tool can actually be used as a rivet inserter, particularly within confined spaces, by opening the handles, placing the mandrel within the open jaws, releasing the handles to compress the jaws about the mandrel and then placing the rivet portion, which is now secured to the tool,
  • This pivoting has in the past been accomplished by means of a pin having an enlarged head and a projecting shank both of which are circular in cross-section.
  • the head of the pin is generally supported in a circular opening in one side of the body and the terminal portion of the shank is similarly supported in a circular opening in-the opposite side of the body.
  • the terminal ends of the pin generally project outward beyond the respective sides of the body by a small but significant distance. This is, of course, quite disadvantageous because the tool can snag or catch on the clothing of the operator, on buttons, on projections, etc.
  • a first upstanding boss is provided to substantially surround the head of the pin and a second upstanding boss is provided to substantially surround the projecting terminal portion of the shank of the pin to the level of the end securing means.
  • the present invention also includes a relatively simple but specially constructed support structure for the pivot pin which provides improved wear characteristics.
  • handles of the tool of this invention are biased in closed position means must be provided for the operator to easily open the jaws and selectively to hold them open. Since one hand of the operator of this invention will at one time be occupied in placing the mandrel of the rivet within the open jaws it is necessary to provide some type of auxiliary means to aid in opening these jaws.
  • These means comprise a thumb rest portion which laterally projects from the body of the tool adjacent the handles.
  • FIG. 1 is a side elevational view of a rivet setting tool made in accordance with this invention showing the normal closed biased position of the handle members thereof.
  • FIG. 2 is a side elevational view of the type of blind rivet utilized in connection with the rivet setting tool of this invention.
  • FIG. 4 is a view similar to that of FIG. 3 but with the handle means pulled into open position showing the position of the parts in that condition.
  • FIG. 5 is a plan view of the rivet setting tool of this invention.
  • FIG. 6 is a fragmentary side elevational view of the rivet setting tool of this invention with the jaws in open position but biased toward the closed position and further showing the manner in which the mandrel is automatically gripped by the jaws of the rivet setting tool used as a rivet carrier to place a rivet within an opening located within a deep channel.
  • FIG. 7 is a fragmentary cross-sectional view taken along lines 77 of FIG. 1.
  • FIG. 8 is a fragmentary side elevational view essentially similar to the view of the tool depicted in FIG. 6 but showing the opposite side of the tool of this invention.
  • FIG. 9 is a fragmentary sectional view of the spring which biases the handles of the tool in closed position taken along lines 9-9 of FIG. 8.
  • FIG. 10 is a fragmentary cross-sectional view on an enlarged scale, showing a steel wear insert within the lower part of the offset driving portion of the tool of this invention.
  • the rivet setting tool 11 of this invention includes a main body portion 12 and an offset housing 13 containing the driving portion of the tool-In the construction shown in the drawings
  • driving portion 13 is cylindrical while body portion 12 includes a pair of spaced sides 14 and 15.
  • actuating means comprising, a handle 16 is pivotally connected by means of pin 17 which extends through mating openings located within sides 14 and 15 and handle 16.
  • Pin 17 includes an enlarged head portion 18, a shank portion 19.
  • the pin is supported at its headed end by a square holding portion 20 formed integrally with shank 19.
  • the holding portion 20 is, in turn, supported in a mating square opening 21 is provided within side 14 of portion 12.
  • pin 17 i.e., the terminal portion of shank 19
  • a square bushing member 23 disposed within a mating square opening 22 in side 15 of body 12.
  • a washer 24 is mounted on the projecting end portion of shank 19.As shown the terminal end portion of shank 19 projects slightly outwardly of the external surface of side 15.
  • a retainer in the form of a C-ring 25 is seated in a recess 26 provided in the projecting end portion of shank 19.
  • a projecting boss 27 is provided on side 15 and surrounds the projecting end portion of shank 19 in substantially flush relationship to C-ring 25.
  • a similarly situated projecting boss 28 is provided on side 14 in surrounding and substantially flush relationship to head 18 of the pin.
  • Handle 16 has a bifurcated end which defines two spaced actuator tenons having cam or bearing surfaces 29'.
  • the tenons 29 are provided with openings 30 which are aligned with respect to each other and with respect to openings 21 and 22 in body sides 14 and 15, respectively, to receive pin shank 19 there through as best shown in FIG. 7.
  • Bifurcated tenons 29 are operatively connected to pulling member 32 in follower seats defined by a pair of oppositely disposed recesses 31 in pulling member 32.
  • a longitudinal bore 56 is provided within portion 13 and pulling member 32 is adapted to move slidably within bore 56 in response to pivotal movement of handle 16 about pivot pin 17.
  • Driving portion 13 is commonly made of a soft castable metal such as aluminum and a mild steel insert 52 is provided in the lower end of bore 56 for a purpose to be explained more fully below. Insert 52 has threads 53 therewithin and knurling 54 therewithout. Knurling 54 keeps insert 53 in position within bore 56 13 and threads 53 are adapted to mesh with mating threads 35 carried by removable nose piece 34.
  • Nose piece 34 is provided with an bore 36 therewithin which is in alignment with bore 51 within upper jaw spreader 41 disposed within the lower portion of bore45 in pulling member 32.
  • a mandrel 37 of a rivet 38 is adapted to be inserted into bores 36 and 51 with the eyelet portion 37a of rivet 38 positioned externally of the driving portion 13 below nose piece 34 as best shown in FIG. 7.
  • lower jaw spreader 39 which, as best seen in FIG. 10, includes a cone shaped cam surface 39'.
  • Cam surface 39 coacts with the lower angled ends of jaws 40 to apply an opening force upon jaws 40 when jaws 40 are moved into contact therewith as will be more fully explained below.
  • the opposite or upper ends of jaws 40 are subjected to a similar opening force when the similar cone shaped cam surface 41' on the .upper jaw spreader 41 is moved into contact with the upper angled ends of jaws 40 as will also be more fully explained below.
  • Jaw spreader 41 has a reduced diameter shank portion 42 which is surrounded by coil spring 43. Coil spring 43 is disposed within bore in pulling member 32.
  • jaws 40 taper inwardly toward their lower ends i.e. in the direction toward lower jaw spreader 39) and they contact internally disposed ta- I pering surface 44 in the lowermost portion of the lower part 57 of pulling member 32. Jaws 40 and tapering surface 44 are slidable relative to each other for a purpose explained more fully below.
  • Coil spring 43 is supported at its lower end on shoulder 43' of jaw spreader 41 and it is retained in bore 45 of pulling member 32 by a plug 46.
  • plug 46 which is threadedly secured within the top portion of member 32, has a portion which fits within spring 43.
  • a screw driver slot 47 is provided within plug 46 to permit this plug to be removed and inserted for assembly and disassembly purposes.
  • Plug 46 is also provided with hole 58 which in conjunction with bores 45, S1 and 36 in pulling member 32, upper jaw spreader 41 and nose piece 34, respectively, provide a thrupassageway throughout the entire driving portion 13 of the tool, the purpose of which will be explained below.
  • a laterally projecting thumb rest 48 is carried by body 12 adjacent the handle portion. Knurling 49 is provided on thumb rest 48.
  • Nose piece 34 is designed to accommodate a mandrel of a rivet of a particular diameter. In the event another diameter of mandrel is to be employed in thetool or in the event the nose piece must be changed, provision is made for carrying a spare or alternate nose piece 34a located in a threaded hole in the tool as shown in FIG. 4.
  • the operator of the tool grasps handle 16 and the corresponding handle portion of body 12 and, by holding his thumb of one hand on thumb rest 48, forces the handles apart with the other hand.
  • jaws 40 When fully opened, it will be recognized that jaws 40 are biased toward their closed position by spring 43; the handle 16 thereby being also biased toward its closed position (shown in FIG. 3) since the spring cooperatively engages the jaws and handle through jaw spreader 41. In other words, the handle 16 must be forcefully held fully opened to keep the jaws fully opened.
  • a rivet setting tool having a body, selectively operable actuating means, support means for pivotally mounting the actuating means on the body and rivet setting means within the body responsive to pivotal movement of the actuating means, the improvement wherein said support means comprises:
  • a pin-like element a pin-like element; and b. a member supporting the pin, saidmember having a polygonal-shaped bearing surface; and c. a polygonal-shaped surface carried by the body disposed in substantially surface-to-surface mating relationship with respect to said first mentioned polygonal shaped surface.
  • a rivet setting tool for blind rivets comprising, in combination, a body element having a main portion and an offset driving portion, a plurality of co-acting jaws disposed within said offset driving portion, actuating means controlling said jaws, an elongated handle pivotally connected to said body portion and operatively connected to said actuating means, a pin having a pair of end portions passing through said elongated handle and said body element, a boss carried by said body element adjacent each of the end portions of said pin, said pin having an enlarged head element and a square holding portion beneath said head, the portion of said body element adjacent said square holding portion provided with a matching square opening for receiving said holding portion.
  • a rivet setting tool as described in claim 2 wherein said body element is provided with an additional square opening laterally opposite said first named square opening and wherein a square holding element with a hole therethrough is disposed within said additional square opening.
  • a rivet setting tool for blind rivets having a body formed with a hollow driving portion made of a soft metal, a pair of co-acting jaws within said driving portion and a bored nose piece for receiving the mandrel disposed within a hole in said driving portion adjacent said jaws, the improvement which comprises a tubular insert of a hard metal disposed within said hole in intervening relationship to said nose piece and said driving portion.
  • a rivet setting tool having a body, a handle member pivotally connected to said body, and rivet setting means operatively connected with said handle member, the improvement that comprises a pin pivotally connecting said handle member to said body, said pin having a polygonal portion disposed thereupon, said body having amating polygonal recess to accommodate said pin so that said pin will not turn during pivotal movement of said handle.
  • a structure as described in claim 9 said pin having a head, said polygonal portion being directly beneath said head.
  • a structure as described in claim 10 said body having a pair of spaced sides each provided with a polygonal recess therewithin, said handle being pivotally disposed between said sides, said polygonal portion upon said pin disposed within one of said polygonal recesses, a second polygonal member secured within the other of said polygonal recesses and provided with an opening adapted to accommodate said pin.
  • a rivet setting tool comprising, in combination, a body element of aluminum having a main portion and a substantially right-angled offset driving portion, a cylindrical slidably movable pulling member disposed within said driving portion, a plurality of jaws, within the pulling member, said main portion having a pair of spaced sides each provided with a polygonal opening therewithin and said driving portion being tubular and open at both ends, an insert of mild carbon steel having a knurled outer portion and a threaded inner portion secured within the threaded portion of said insert, sec- 0nd jaw spreading means coacting with the other end of said jaws, a coil spring one end of which abuts said second jaw spreading means disposed with said pulling member, a plug at one end of said pulling member abutting the other end of said spring, an elongated handle having an actuating portion disposed adjacent said pulling member, said coil spring adapted to bias said handle and the jaws into closed position, a pin connectiug said handle to said body element, said pin having an

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Insertion Pins And Rivets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00110912A 1971-01-29 1971-01-29 Rivet setting tool for blind rivets Expired - Lifetime US3842649A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00110912A US3842649A (en) 1971-01-29 1971-01-29 Rivet setting tool for blind rivets
CA132,180A CA964239A (en) 1971-01-29 1972-01-11 Rivet setting tool for blind rivets
GB320372A GB1376064A (en) 1971-01-29 1972-01-24 Rivet setting tool for blind rivets
DE7202903U DE7202903U (de) 1971-01-29 1972-01-27 Blindniet-zange
DE2264780*A DE2264780A1 (de) 1971-01-29 1972-01-27 Blindnietzange
DE2203722A DE2203722C3 (de) 1971-01-29 1972-01-27 Blindniet-Zange
FR7202833A FR2123499B1 (Direct) 1971-01-29 1972-01-28
JP1977076783U JPS5353171Y2 (Direct) 1971-01-29 1977-06-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00110912A US3842649A (en) 1971-01-29 1971-01-29 Rivet setting tool for blind rivets

Publications (1)

Publication Number Publication Date
US3842649A true US3842649A (en) 1974-10-22

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ID=22335611

Family Applications (1)

Application Number Title Priority Date Filing Date
US00110912A Expired - Lifetime US3842649A (en) 1971-01-29 1971-01-29 Rivet setting tool for blind rivets

Country Status (6)

Country Link
US (1) US3842649A (Direct)
JP (1) JPS5353171Y2 (Direct)
CA (1) CA964239A (Direct)
DE (3) DE7202903U (Direct)
FR (1) FR2123499B1 (Direct)
GB (1) GB1376064A (Direct)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037448A (en) * 1975-03-10 1977-07-26 Marson Corporation Metal leveler tool
USD256327S (en) 1978-04-04 1980-08-12 Parker Manufacturing Company Riveter
US4347729A (en) * 1980-07-17 1982-09-07 Kiyoshi Mitani Hand riveter
WO1982003028A1 (en) * 1981-03-04 1982-09-16 Todisco Joseph A hand-held rivet setting tool and method
US4425782A (en) 1981-12-03 1984-01-17 Marson Corporation Hand-held setting tool and method for setting deformable head fasteners
US5050420A (en) * 1990-08-29 1991-09-24 Liu Yang Ting Multi-functional riveter
USD407615S (en) 1997-12-29 1999-04-06 Emhart Inc. Hand rivet setting tool
US6115900A (en) * 1997-12-30 2000-09-12 Emhart Inc. Hand rivet setting tool
US20110209341A1 (en) * 2010-02-26 2011-09-01 Karat Industrial Corporation Rivet tool capable of measuring size of blind rivet
USD700492S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700490S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700491S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700489S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
US20150040374A1 (en) * 2007-01-16 2015-02-12 Harry E. Taylor Blind rivet setting method
US10500631B2 (en) * 2016-11-24 2019-12-10 Yuyao Tangwen Tool Co., Ltd. One-hand handled riveter
US11179766B2 (en) * 2017-11-02 2021-11-23 Hangzhou Great Star Industrial Co., Ltd. Pull riveting system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537794C2 (de) * 1975-08-25 1985-09-26 Alfred Honsel Nieten - und Metallwarenfabrik GmbH & Co, 5758 Fröndenberg Druckmittelbetätigtes Blindnietgerät
DE2822937A1 (de) * 1978-05-26 1979-11-29 Schruff Herberts Nietzange zum vernieten von blindniete
CZ2362U1 (cs) * 1993-09-14 1994-09-15 Josef Wihan Ruční nýtovací nástroj
US5437085A (en) * 1993-11-16 1995-08-01 Liu; Yang-Ting Hand portable riveter
FR2924969B1 (fr) * 2007-12-17 2010-05-14 Prospection Et D Inventsions T Pince pour pose de cheville d'ancrage a douille retractable et compressible

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037448A (en) * 1975-03-10 1977-07-26 Marson Corporation Metal leveler tool
USD256327S (en) 1978-04-04 1980-08-12 Parker Manufacturing Company Riveter
US4347729A (en) * 1980-07-17 1982-09-07 Kiyoshi Mitani Hand riveter
WO1982003028A1 (en) * 1981-03-04 1982-09-16 Todisco Joseph A hand-held rivet setting tool and method
US4425782A (en) 1981-12-03 1984-01-17 Marson Corporation Hand-held setting tool and method for setting deformable head fasteners
US5050420A (en) * 1990-08-29 1991-09-24 Liu Yang Ting Multi-functional riveter
USD407615S (en) 1997-12-29 1999-04-06 Emhart Inc. Hand rivet setting tool
US6115900A (en) * 1997-12-30 2000-09-12 Emhart Inc. Hand rivet setting tool
US20150040374A1 (en) * 2007-01-16 2015-02-12 Harry E. Taylor Blind rivet setting method
US9481027B2 (en) * 2007-01-16 2016-11-01 Harry E. Taylor Blind rivet setting method
US20110209341A1 (en) * 2010-02-26 2011-09-01 Karat Industrial Corporation Rivet tool capable of measuring size of blind rivet
USD700490S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700491S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700489S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
USD700492S1 (en) * 2010-02-26 2014-03-04 Karat Industrial Corporation Portion of an arm of a riveter
US8650731B2 (en) * 2010-02-26 2014-02-18 Karat Industrial Corporation Rivet tool capable of measuring size of blind rivet
US10500631B2 (en) * 2016-11-24 2019-12-10 Yuyao Tangwen Tool Co., Ltd. One-hand handled riveter
US11179766B2 (en) * 2017-11-02 2021-11-23 Hangzhou Great Star Industrial Co., Ltd. Pull riveting system

Also Published As

Publication number Publication date
DE2203722B2 (de) 1974-12-12
DE2264780A1 (de) 1975-07-31
JPS5353171Y2 (Direct) 1978-12-19
CA964239A (en) 1975-03-11
DE2203722A1 (de) 1972-08-03
DE7202903U (de) 1976-03-25
GB1376064A (en) 1974-12-04
DE2203722C3 (de) 1975-08-07
FR2123499A1 (Direct) 1972-09-08
JPS52167667U (Direct) 1977-12-19
FR2123499B1 (Direct) 1974-12-13

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