CA1042826A - Universal joint-link chain - Google Patents
Universal joint-link chainInfo
- Publication number
- CA1042826A CA1042826A CA256,587A CA256587A CA1042826A CA 1042826 A CA1042826 A CA 1042826A CA 256587 A CA256587 A CA 256587A CA 1042826 A CA1042826 A CA 1042826A
- Authority
- CA
- Canada
- Prior art keywords
- hinge
- chain
- link
- universal joint
- shaft
- 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
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- Chain Conveyers (AREA)
Abstract
Inventors: HANS-ULRICH STAUBER and J?RG EBERLE
Invention: UNIVERSAL JOINT-LINK CHAIN
ABSTRACT OF THE DISCLOSURE
A universal joint-link chain wherein the chain links are provided at one end with a hinge body and at the other end with a hinge socket, the hinge socket receiving the hinge body of the neighboring link. The hinge sockets and the hinge bodies are constructed as essentially equatorial spherical segments, and connection elements of the chain links laterally engage as the hinge bodies which are wider than the hinge sockets.
Invention: UNIVERSAL JOINT-LINK CHAIN
ABSTRACT OF THE DISCLOSURE
A universal joint-link chain wherein the chain links are provided at one end with a hinge body and at the other end with a hinge socket, the hinge socket receiving the hinge body of the neighboring link. The hinge sockets and the hinge bodies are constructed as essentially equatorial spherical segments, and connection elements of the chain links laterally engage as the hinge bodies which are wider than the hinge sockets.
Description
~-~ ~
1()4Z8Z6 BACKGROUND OF THE INVENTION .
The present invention relates to a new and improved construction of a universal joint-link chain or ball-and-socket link chain wherein each of the chain links are provided at one end with a hinge element or body and at the other end with a hinge socket, the hinge socket of one chain link receiving the hinge body of the neighboring chain link.
From Swiss patent 410,551, illustrating a typical species of a ball-and-socket link chain or universal joint-link chain of the previously mentioned type, it will be readily recognized that the universal joints which require a particular manufacturing technique due to the basic shape of the hinge bodies and hinge sockets, also pose additional constructional problems because of their mounting which further increase the cost of fabricating such chains. Additionally, such chains, in comparison to their load-carrying capability are heavy, , bacause the hinge bodies exert a spreading action upon the hinge i sockets, making it necessary to still further dimensionally increase the hlnge joints which are already rather voluminous due to their construction.
1. . '~ "
SUMMARY OF THE INVENTION
':, " ' aence, it is a primary object of the present invention to provide a new and improved construction of universal joint-link chain which is not associated with the aforementioned "
.~ ' ~ ~' . - 2 - ' ~
. ; .- '.:
. 104Z~Z6 ¦ drawbacks and limitations of the prior art proposals.
I
¦Another and more specific object of the present invention aims at the provision of a novel construction of ball-and-socket joint-link chain,-- also referred to herein as a universal joint-link chain -- which is relatively simple in construction and design, relatively easy and inexpensive to manufacture, extremely reliable in operation, and requires a minlmwm of servicing and maintenance.
Now in order to implemen~ these and still further ob~ects of the invention, which will become more readily apparent as the description proceeds, the universal joint-link chain of the invention is manifested by the features that the hinge sockets and the hinge bodies are substantially constructed as equatorial spherical segments, and connection elements of the chain links laterally engage at the hinge bodies which are wider than the hinge sockets. :
: '.'~"'' '" ' With thls embodiment the hinge sockets constructed as equatorial spherical segements and thus of ring-shaped configura-tion are oriented essentially in the lengthwise direction of the ;
chain links as a direct result of the lateral anchoring of the hinge bodles and engage about the hinge bodies approximately in the direction of the force to be transmitted. In this way there is firstly obtained the result that the hinge bodies do not exert spread1ng act1on upon the h1nge sockets and, secondly, '`'' ''' ~
- 3 - ;
. ~,',~'' ''''"
1 104~826 there can be transmitted from one link to the other link both traction forces as well as compressive forces. In other words, such chain basically can be employed while working in a tension or pulling mode or thrust or pushing mode of operation. Apart from elimination of the spreading action and the corresponding smaller dimensioning of the chain for a predetermined load-carry-ing capability, the spatial requirements are also reduced since the joints, in contrast to the conventional ball joints, possess a flattened configuration.
According to a preferred embodiment of the invention each of the connection elements possess a bifurcated or forked portion in which the hinge body is arranged. The connection elements in each instance can be formed by two offset or bent brackets, and the hinge sockets are set in recesses or openings of the one mutually contacting end sections of the brackets.
The hinge bodies arranged between the other end sections of the brackets can be positionally fixed by supporting or journals pins engaging in recesses of such end sections. Consequently, these exemplary embodiments combine the constructional, manufacturing and cost advantages and the favourable loadability of a sprocket chain with the mobility of a unlversal joint-link chain, without having to make those comprises which are known with regard to sprocket chain~ in order to impart thereto a certain lateral flexibility and!or ability to be exposed to torsional loads.
Hence, the inventive universal joint-link chain basically differs from, for instance, the sprocket chain disclosed in German patent ~ -1,303,501 where the chain links are interconnected by cross-hinges ~ , ' ' ' " , , , , . : ' ,. , . . ' ' . ' ' :
~)4Z8Z6 which permit lateral bending of the chain. By way of complete-ness there is also here mentioned German patent publication
1()4Z8Z6 BACKGROUND OF THE INVENTION .
The present invention relates to a new and improved construction of a universal joint-link chain or ball-and-socket link chain wherein each of the chain links are provided at one end with a hinge element or body and at the other end with a hinge socket, the hinge socket of one chain link receiving the hinge body of the neighboring chain link.
From Swiss patent 410,551, illustrating a typical species of a ball-and-socket link chain or universal joint-link chain of the previously mentioned type, it will be readily recognized that the universal joints which require a particular manufacturing technique due to the basic shape of the hinge bodies and hinge sockets, also pose additional constructional problems because of their mounting which further increase the cost of fabricating such chains. Additionally, such chains, in comparison to their load-carrying capability are heavy, , bacause the hinge bodies exert a spreading action upon the hinge i sockets, making it necessary to still further dimensionally increase the hlnge joints which are already rather voluminous due to their construction.
1. . '~ "
SUMMARY OF THE INVENTION
':, " ' aence, it is a primary object of the present invention to provide a new and improved construction of universal joint-link chain which is not associated with the aforementioned "
.~ ' ~ ~' . - 2 - ' ~
. ; .- '.:
. 104Z~Z6 ¦ drawbacks and limitations of the prior art proposals.
I
¦Another and more specific object of the present invention aims at the provision of a novel construction of ball-and-socket joint-link chain,-- also referred to herein as a universal joint-link chain -- which is relatively simple in construction and design, relatively easy and inexpensive to manufacture, extremely reliable in operation, and requires a minlmwm of servicing and maintenance.
Now in order to implemen~ these and still further ob~ects of the invention, which will become more readily apparent as the description proceeds, the universal joint-link chain of the invention is manifested by the features that the hinge sockets and the hinge bodies are substantially constructed as equatorial spherical segments, and connection elements of the chain links laterally engage at the hinge bodies which are wider than the hinge sockets. :
: '.'~"'' '" ' With thls embodiment the hinge sockets constructed as equatorial spherical segements and thus of ring-shaped configura-tion are oriented essentially in the lengthwise direction of the ;
chain links as a direct result of the lateral anchoring of the hinge bodles and engage about the hinge bodies approximately in the direction of the force to be transmitted. In this way there is firstly obtained the result that the hinge bodies do not exert spread1ng act1on upon the h1nge sockets and, secondly, '`'' ''' ~
- 3 - ;
. ~,',~'' ''''"
1 104~826 there can be transmitted from one link to the other link both traction forces as well as compressive forces. In other words, such chain basically can be employed while working in a tension or pulling mode or thrust or pushing mode of operation. Apart from elimination of the spreading action and the corresponding smaller dimensioning of the chain for a predetermined load-carry-ing capability, the spatial requirements are also reduced since the joints, in contrast to the conventional ball joints, possess a flattened configuration.
According to a preferred embodiment of the invention each of the connection elements possess a bifurcated or forked portion in which the hinge body is arranged. The connection elements in each instance can be formed by two offset or bent brackets, and the hinge sockets are set in recesses or openings of the one mutually contacting end sections of the brackets.
The hinge bodies arranged between the other end sections of the brackets can be positionally fixed by supporting or journals pins engaging in recesses of such end sections. Consequently, these exemplary embodiments combine the constructional, manufacturing and cost advantages and the favourable loadability of a sprocket chain with the mobility of a unlversal joint-link chain, without having to make those comprises which are known with regard to sprocket chain~ in order to impart thereto a certain lateral flexibility and!or ability to be exposed to torsional loads.
Hence, the inventive universal joint-link chain basically differs from, for instance, the sprocket chain disclosed in German patent ~ -1,303,501 where the chain links are interconnected by cross-hinges ~ , ' ' ' " , , , , . : ' ,. , . . ' ' . ' ' :
~)4Z8Z6 which permit lateral bending of the chain. By way of complete-ness there is also here mentioned German patent publication
2,106,095. In the chain disclosed therein the chain links are connected with one another at single-axis hinges, wherein however the hinge axes are alternately rotated through 90, so that the -~
chain possesses two degrees of freedom of movement. Yet, in neither instance is there achieved the freedom of movement which can be obtained with a universal joint.
In accordance with a particular embodiment, a univer-sal joint-link chain comprises a plurality of chain links, each chain link having opposed ends, one end of each chain link being provided with a hinge body and the opposite end with a hinge socket, the hinge socket of one chain link receiving the hinge body of the neighboring chain link, each hinge socket and each hinge body is formed as an equatorial spherical segment, each chain link including a connection element laterally engaging with the hinge bodies, said hinge bodies being wider than the hinge sockets, a shaft for mounting each hinge body, said shaft ;~ , having opposed ends, travelling wheels provided at the opposed ends of the shaft, a~`substantially C-shaped guide channel which is downwardly open and having spaced apart confronting flanges, a guide wheel arranged at the region of the travelling wheels, said guide wheel having an axis extending essentially perpendic-ular to its related connection element and through the center of the associated universal joint, said confronting flanges serving both for guiding thereon the travelling wheels and there-between the guide wheels, support means carried by each chain link, said support means including mechanism for the attachment of a conveyed material, said attachment mechanism of the support ~-means comprising a lateral offloading attachment element.
BRIEF DESCRIPTION OF THE DRAWI~GS
The invention will be better understood and objects ~` ; '.
1~4;~826 other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:-Figure 1 is a top plan view of the guide channelwhich, in cross-section, possesses a C-shaped configuration and the chain travelling therein, such chain is constructed accord-ing to the present invention;
Figure 2 is a side view of the guide channel, taken in section along the line II-II of Figure 1, and also illus-trating in partial sectional view the chain; and Figure 3 is a cross-sectional view along the line III-III of Figure 2.
;' ~''' , .
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........ -.. ; .... ~.. - .. . .. - .. . . . . i ,.. , .. ... ; .. ... . ... . ...... .
104Z8~:6 DETAILED DESCRIPTION OF T~E PREFERRED EMBODIMENTS
I Describing now the drawings, and as will be particularly ¦ recognized by referring to Figures 1 and 3, each universal joint, ¦ designated in its entirity by reference character 1, possesses ¦ a substantially ring-shaped swivel-or hinge-socket 2 and a swivel ¦ or hinge body or element 3 which is wider than such hinge socket.
¦ Both the hinge sockets 2 and hinge bodies or elements 3 are ¦ constructed as equatorial spherical segments. The plane of the ¦ equator of the hinge socket simultaneously constitutes the length-wise central plane of the chain link designated in its entirity by reference character 4.
., ' ' :''' .:
t , Each chain link possesses connection elements in the form of offset of bent brackets or plates 5 which bear with their respective one end section 6 against one another. The hinge socket 2 is set in recesses or openings 7 of such end sections 6 which are connected by rivets 8 or other suitable fastening expedients with one another. The opposite end sections 9 of the brackets 5 form a bifurcated or forked portion 10 in which there ;~
i8 accommodated the associated flattened spherical hinge body 3.
', . . ,~' '';, The hinge body 3 has inserted therethrough, at each chain link 4, a shaft 11, as particularly well seen by referring ~ -to Figure 3. Such shaft ll extends through openings 12 of the end sections ~ of the brackets 5 and laterally of the brackets .
104Z8;i:6 carries spacer sleeves 13 as well as traveling wheels or rollers 14 which are fixed in axial direction by the nut members 15 or the like. This arrangement ensures, apart from its constructiona simplicity, also easy and rapid mounting.
The wheels 14 travel upon the flanges 18 of a guide channel 17, these flanges bounding the slot 16 of channel 17 -which in cross-section is essentially C-shaped. Between the flanges 18 there is located a guide wheel 19, the shaft 20 of which is disposed perpendicular to the brackets or plates 5 and is directed approximately towards the center of the universal joint or ball-and-socket joint 1. This shaft 20 is mounted at -one end of a flexed or offset cantilever 21, as seen by referring to Figure 2, and which cantilever engages with its other end between the snd sections 9 of the brackets 5 and connected there-with by a rivet 22 or other suitable fastening expedients. In an eyelet 23 of the cantilever 21 there is held one end of a rod 24 which extends towards one side of the guide channel 17 or the chain, respectively, and serves as an attachment eiement or means for the conveyed material. With the illustrated exemplary embodiment each chain link carries such a rod 24. The purpose of th1s measure will be yet explained hereinafter. Depending on the field of use the number and also the shape of such attachment elements can be different.
The mode of operation of the described chain should be readily understood: it can be driven in both directions and thus can be either pulled or pushed. In both instances the _ 11 104Z826 operating conditions are favourable inasmuch as the traveling wheels 14, but also the guide wheel 19 are centrally arranged with respect to the universal joint. The guide channel can be straight or possess spatially curved sections, and twisting or torsion is readily possible in both instances. During the traction or pulling mode of operation the chain preferably travel in the directlon indicated by the arrow appearing in Figure 1, during the thrust or pushing operation in the opposite direction. :
Consequently, in the arcuate-shaped sections of the track the radial components of the traction- or thrust forces are partially compensated by the position of the traveling wheels, so that ;-'_he guide wheels are relieved of load. :
. .".,;' ~ ' The described embodiment is particularly useful for conveying printed products which arrive in an imbricated product stream, with the aid of controlled clamps, generally schematically represented by reference character ~0 in Figure 3, which are secured to the rods 24 and seize the leading edges of the printed products. In this manner the product copies which are carried along in the imbricated product stream are separated and then they can be individually handled, for instance for further automated processing by suitable machinery, such as by delivering the same to a stuffing machine and so Eorth. Due to the universal flexibility of the chain there is afforded an extensive freedom with respect to the course of the conveyor track and the arrange- ~ -ment of the individual processing stations. The foregoing example is to be considered as generally valid for the proposition that with the aid of the described chain it is possible to readily ~ ,, , ., ~., ., ~ ..
- -`11 ~ 1~428Z6 ¦ solve product conveying or transport problems, and also generally ¦ drive problems, while taking into account the spatial guiding of ¦ the chain. In this connection the wide gauge arrangement of the ¦ traveling wheels, with the described exemplary embodiment, is not ¦ to be considered in any way as a limitation. As will be apparent ¦ from the drawing there also can be employed, without any problem, ¦ an embodiment working with narrow gauge, and this is so because ¦ the universal joints -- as mentioned -- are laterallyflattened.
Finally, it is to be understood that the chain also can be used without any conveyor channel in the same or comparable embodiment.
I
¦ While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto but may be otherwise ; variously embodied and practiced within the scope of the following ~ claimu. CCORDINGLY, . .:. ;, . ,, . `: ' "
. . : ' -
chain possesses two degrees of freedom of movement. Yet, in neither instance is there achieved the freedom of movement which can be obtained with a universal joint.
In accordance with a particular embodiment, a univer-sal joint-link chain comprises a plurality of chain links, each chain link having opposed ends, one end of each chain link being provided with a hinge body and the opposite end with a hinge socket, the hinge socket of one chain link receiving the hinge body of the neighboring chain link, each hinge socket and each hinge body is formed as an equatorial spherical segment, each chain link including a connection element laterally engaging with the hinge bodies, said hinge bodies being wider than the hinge sockets, a shaft for mounting each hinge body, said shaft ;~ , having opposed ends, travelling wheels provided at the opposed ends of the shaft, a~`substantially C-shaped guide channel which is downwardly open and having spaced apart confronting flanges, a guide wheel arranged at the region of the travelling wheels, said guide wheel having an axis extending essentially perpendic-ular to its related connection element and through the center of the associated universal joint, said confronting flanges serving both for guiding thereon the travelling wheels and there-between the guide wheels, support means carried by each chain link, said support means including mechanism for the attachment of a conveyed material, said attachment mechanism of the support ~-means comprising a lateral offloading attachment element.
BRIEF DESCRIPTION OF THE DRAWI~GS
The invention will be better understood and objects ~` ; '.
1~4;~826 other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:-Figure 1 is a top plan view of the guide channelwhich, in cross-section, possesses a C-shaped configuration and the chain travelling therein, such chain is constructed accord-ing to the present invention;
Figure 2 is a side view of the guide channel, taken in section along the line II-II of Figure 1, and also illus-trating in partial sectional view the chain; and Figure 3 is a cross-sectional view along the line III-III of Figure 2.
;' ~''' , .
' ,'.'~ ;"
'i ~' - 5a - ~ -A`
........ -.. ; .... ~.. - .. . .. - .. . . . . i ,.. , .. ... ; .. ... . ... . ...... .
104Z8~:6 DETAILED DESCRIPTION OF T~E PREFERRED EMBODIMENTS
I Describing now the drawings, and as will be particularly ¦ recognized by referring to Figures 1 and 3, each universal joint, ¦ designated in its entirity by reference character 1, possesses ¦ a substantially ring-shaped swivel-or hinge-socket 2 and a swivel ¦ or hinge body or element 3 which is wider than such hinge socket.
¦ Both the hinge sockets 2 and hinge bodies or elements 3 are ¦ constructed as equatorial spherical segments. The plane of the ¦ equator of the hinge socket simultaneously constitutes the length-wise central plane of the chain link designated in its entirity by reference character 4.
., ' ' :''' .:
t , Each chain link possesses connection elements in the form of offset of bent brackets or plates 5 which bear with their respective one end section 6 against one another. The hinge socket 2 is set in recesses or openings 7 of such end sections 6 which are connected by rivets 8 or other suitable fastening expedients with one another. The opposite end sections 9 of the brackets 5 form a bifurcated or forked portion 10 in which there ;~
i8 accommodated the associated flattened spherical hinge body 3.
', . . ,~' '';, The hinge body 3 has inserted therethrough, at each chain link 4, a shaft 11, as particularly well seen by referring ~ -to Figure 3. Such shaft ll extends through openings 12 of the end sections ~ of the brackets 5 and laterally of the brackets .
104Z8;i:6 carries spacer sleeves 13 as well as traveling wheels or rollers 14 which are fixed in axial direction by the nut members 15 or the like. This arrangement ensures, apart from its constructiona simplicity, also easy and rapid mounting.
The wheels 14 travel upon the flanges 18 of a guide channel 17, these flanges bounding the slot 16 of channel 17 -which in cross-section is essentially C-shaped. Between the flanges 18 there is located a guide wheel 19, the shaft 20 of which is disposed perpendicular to the brackets or plates 5 and is directed approximately towards the center of the universal joint or ball-and-socket joint 1. This shaft 20 is mounted at -one end of a flexed or offset cantilever 21, as seen by referring to Figure 2, and which cantilever engages with its other end between the snd sections 9 of the brackets 5 and connected there-with by a rivet 22 or other suitable fastening expedients. In an eyelet 23 of the cantilever 21 there is held one end of a rod 24 which extends towards one side of the guide channel 17 or the chain, respectively, and serves as an attachment eiement or means for the conveyed material. With the illustrated exemplary embodiment each chain link carries such a rod 24. The purpose of th1s measure will be yet explained hereinafter. Depending on the field of use the number and also the shape of such attachment elements can be different.
The mode of operation of the described chain should be readily understood: it can be driven in both directions and thus can be either pulled or pushed. In both instances the _ 11 104Z826 operating conditions are favourable inasmuch as the traveling wheels 14, but also the guide wheel 19 are centrally arranged with respect to the universal joint. The guide channel can be straight or possess spatially curved sections, and twisting or torsion is readily possible in both instances. During the traction or pulling mode of operation the chain preferably travel in the directlon indicated by the arrow appearing in Figure 1, during the thrust or pushing operation in the opposite direction. :
Consequently, in the arcuate-shaped sections of the track the radial components of the traction- or thrust forces are partially compensated by the position of the traveling wheels, so that ;-'_he guide wheels are relieved of load. :
. .".,;' ~ ' The described embodiment is particularly useful for conveying printed products which arrive in an imbricated product stream, with the aid of controlled clamps, generally schematically represented by reference character ~0 in Figure 3, which are secured to the rods 24 and seize the leading edges of the printed products. In this manner the product copies which are carried along in the imbricated product stream are separated and then they can be individually handled, for instance for further automated processing by suitable machinery, such as by delivering the same to a stuffing machine and so Eorth. Due to the universal flexibility of the chain there is afforded an extensive freedom with respect to the course of the conveyor track and the arrange- ~ -ment of the individual processing stations. The foregoing example is to be considered as generally valid for the proposition that with the aid of the described chain it is possible to readily ~ ,, , ., ~., ., ~ ..
- -`11 ~ 1~428Z6 ¦ solve product conveying or transport problems, and also generally ¦ drive problems, while taking into account the spatial guiding of ¦ the chain. In this connection the wide gauge arrangement of the ¦ traveling wheels, with the described exemplary embodiment, is not ¦ to be considered in any way as a limitation. As will be apparent ¦ from the drawing there also can be employed, without any problem, ¦ an embodiment working with narrow gauge, and this is so because ¦ the universal joints -- as mentioned -- are laterallyflattened.
Finally, it is to be understood that the chain also can be used without any conveyor channel in the same or comparable embodiment.
I
¦ While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto but may be otherwise ; variously embodied and practiced within the scope of the following ~ claimu. CCORDINGLY, . .:. ;, . ,, . `: ' "
. . : ' -
Claims (6)
1. A universal joint-link chain comprising a plurality of chain links, each chain link having opposed ends, one end of each chain link being provided with a hinge body and the opposite end with a hinge socket, the hinge socket of one chain link receiving the hinge body of the neighboring chain link, each hinge socket and each hinge body is formed as an equatorial spherical segment, each chain link including a connection ele-ment laterally engaging with the hinge bodies, said hinge bodies being wider than the hinge sockets, a shaft for mounting each hinge body, said shaft having opposed ends, travelling wheels provided at the opposed ends of the shaft, a substantially C-shaped guide channel which is downwardly open and having spaced apart confronting flanges, a guide wheel arranged at the region of the travelling wheels, said guide wheel having an axis ex-tending essentially perpendicular to its related connection element and through the center of the associated universal joint, said confronting flanges serving both for guiding thereon the travelling wheels and therebetween the guide wheels, support means carried by each chain link, said support means including mechanism for the attachment of a conveyed material, said attachment mechanism of the support means comprising a lateral offloading attachment element.
2. The universal joint-link chain as defined in claim 1, wherein each of the connection elements is constituted by two offset brackets having end sections, the link sockets being set in recesses of one of the end sections of the brackets, said one end sections abutting against one another.
3. The universal joint-link chain as defined in claim 2, further including a support pin engaging in recesses at the other end sections of each of the connection elements for holding the respective hinge bodies arranged between the other end sections of the brackets.
4. The universal joint-link chain as defined in claim 2, wherein each of the hinge bodies posses a substantially ring-shaped construction and a shaft for mounting each such hinge body.
5. The universal joint-link chain as defined in claim 4, wherein each shaft has opposed ends, travelling wheels provided at the opposed ends of the shaft.
6. The universal joint-link chain as defined in claim 1, wherein said support means comprise cantilever means engaging between the brackets, the guide wheel being mounted at the cantilever means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH81075A CH582947A5 (en) | 1974-01-25 | 1975-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1042826A true CA1042826A (en) | 1978-11-21 |
Family
ID=4195701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,587A Expired CA1042826A (en) | 1975-01-23 | 1976-07-08 | Universal joint-link chain |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1042826A (en) |
-
1976
- 1976-07-08 CA CA256,587A patent/CA1042826A/en not_active Expired
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