CA1209174A - Mounting and actuating apparatus for tongs - Google Patents
Mounting and actuating apparatus for tongsInfo
- Publication number
- CA1209174A CA1209174A CA000414484A CA414484A CA1209174A CA 1209174 A CA1209174 A CA 1209174A CA 000414484 A CA000414484 A CA 000414484A CA 414484 A CA414484 A CA 414484A CA 1209174 A CA1209174 A CA 1209174A
- Authority
- CA
- Canada
- Prior art keywords
- pulley means
- pulley
- cable
- link
- tong
- 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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Abstract
ABSTRACT OF THE DISCLOSURE:
A mounting and actuating apparatus for the tongs of a grapple wherein a pair of pulleys carrying the tongs are interconnected by cable means extending between the pulleys in generally figure eight configuration.
A mounting and actuating apparatus for the tongs of a grapple wherein a pair of pulleys carrying the tongs are interconnected by cable means extending between the pulleys in generally figure eight configuration.
Description
lZ09~L74 Owe particular advantageous environment for the invention is in connection with grapples employed with apparatus for sk~ddi~g logs. Heretofore the grapples have employed expenslve structurally rigid te~sion/compre~sion links which require floating tong pivot points and additionally machined and bushed pun joints. When it i8 considered that the environment is rugged and primitive, the employment of complicated and sometimes delicate parts can be a real disadvantage.
The disadvantages of construction and use are both avoided 10 through the practice of the invention.
According to the invention the tong mounting and actuating apparatus employs a pair of pulley means eaeh rotatably mounted on the frame of the apparatus, the tongs being operatively associated with each pulley means and the pulley means being interconnected by cable means extending between the pulley means in a general figure eight configuration. Through thus mechanism, one rotation of one pulley means -- as by a fluid pressure cylinder -- produces counter rotation of the other pulley mean9.
Other ob~ect~ and advantages of the ~n~ent~on may be seen in the details of the ensuing specification.
DETAILED DESCRIPTION:
_ ; . .
The ~nvent~on i8 described it conjunction with the accompanying drawing in which --FIG. 1 is a front elevational view of appara~cusembodying teachings of the instant invent on;
FIG. 2 is a top plan Jew of the apparatus of FIG.
; . .
~12(~917~L;
FIG. 3 is a side ele~rati:onal view of the apparatus of FIG. l;
FIG. 4 a flew essentially similar to FIG. 1 bug being partially it section and showirlg the grapple witch it tongs in differerlt opes~ating modes in dotted lives;
FIG. 5 ls a frost elevational view essentially similar to that sf FIG. 1 but of anocher version of the invention;
FIG. 6 is an enlarged fragmentary side elevational o view of ache grapple arrangement of FIG. 5 as seen along the line 6-6;
FIG. 7 is a view essentially similar to FIG. 5 buy showing the tong elements in different operating modes;
FIG. 8 is on enlarged fragmentary view of one of the pulley means and fragment of the tong and l~kage of the grapple of FIG. 7 such as would be seen along the sight line 8-8 of FIG, 6, appearing with Figs. 6 and 9; and FIG. 9 is a fragmentary perspective view of one of the pulley means of the embodiment of FIGS. 5-8, appearing with Figs. 6 and 8.
In che illustration given and with reference to the first sheet of the dxawing, the numeral lO designates generally a U-6haped frame which ha ailed to the top wall 11 a swi~rel mechanism 12 Ruitable for co~nect~o~ to a hoist or the like (jot shown). Ire details of one preferred form of swi~rel can be ~ee~ on the seetio~al triew of FIG. 4.
The U-shaped frame 10 i6 equipped ~th a pair of depending walls 13 which are ap~rtured as at 14 and 14' for the rotatable mounting of shafts lS arid 15', repect~el~.
` . ~2~7~ .
Carried by each shaft 15 and 15' for.ro~atisn relate Jo the frsme 10 i8 a pulley mesns geraerally designated 16 and 16', respec~cively. The details of the pulley means 16, 16' cay be better seen in FIG. 4.
The pulley means 16, 16' are interconnected by cable meats generally deslgnated 17 (see the central portion of FIG. 1) which are arranged in essentially a figure eight configuration. As can be best appreciated from a consideration of FIGS. 2 and 3, an eYen umber of links of cable are employed o being designated 17a, 17b, to and 17d. ~ese are ~rra~ged in two pars with the cables in each pair being disposed in crisscrossed or figure eight fashion as can be best appreci-ated from a consideration of FOG. 4. Tor example, the cable link 17a it clamped at one end as at 18 to the pulley means 16 whlle the other end is cIEmped as at 19 to the second pulley ;~ean6 16' (still refersing to FIG. 4). In like fashion, the cable link 17'b i8 clamped as at 20 relative go the pulley means 16 and as at 21 relative to the pulley means 16'.
For thus purpose, the pulley means 16, 16' has 20 an interrupted periphery which can be appreciated from the perspect$ve vie of the pulley means 116' in the modified form of the invention presented in FIG. 9. In any event, the cable links are for illustration shown 88 17a-17d and are tension mounted ox the pulley means. Thy assures that motion of one pulley means develops a corresponding motion of to To develop motion of one pulley means 8S at 16, a fluid psessure cylinder 22 i8 pivotally mounted us at 23 (see the central portion of FIG. 1) on the frame 10. The cylinder unit 22 i8 equipped wlth the usual rod 24 which n is pivotslly connected as at 2~ to the pulley means .. -- 4 --16. Thus, 8 the rod 24 is exte~d~d co ro'cate ache pulley means 16 cou~ate~gloekwise, ache cable intereonnec~ioll develops a cloclwise movemen6c it the pulley movement 16~. This cay be appreci.a~ed best rom a consideration of FIÇ:. 4 and wi h ref ere~aee 'co 'che two tongs or tines 26 and 26 ' which are fixed relatl~e go the pulley mean 16, 16', respecti~Jely.
In ~TG. 49 'che solid live showing of ache tongs 26, 26 ' corresponds to chat of FIG. 1. As the rod 24 is ex~cended further, the tong 26 move co overlapping relacion 0 wlth the tong 26' aTld at Max extension occupies the dotted line position dew ated 27 it FIG. 4. The same action moves ache tong 26' 'co the position designated 27~ in FIG. 4 so that in the "closed" position of the tongs as at 27, 27 ', the - apparatus iQ able to tightly grip a log as at L which may be as small as 6'1 or less in diameter . or this purpose each of the walls 13 us extended downwardly in a general V-shape as at 28, with the wall portions 28 being conne-ted by a stiffening flange 29.
As ache rot 24 us retracted, c}te tongs move frnm the 27, 27 ' positionfi through the positions designated 26, 26 ' and ultimately to the "open" posi'cion designated in dotted lirle and marked 30 and 30' FIG. 4.
f brief, the assembly includes congs pi~rotally connected at fixed pouts on a grapple heat. A series of grooves are cast go the ~ppe~ ead of the tongs 26, 26' a~ou~d the pi-lrot point fox g pulley means. Cables are wrapped alter~atel~ over or-e tong pulley mears and under the other. This 8ssure8 that the motlon of one tong develops a correspo21di~g motlon of toe other, each cable being anchored . -- 5 --at both ends with an adjusting device provided at least at one end 'co assuse union tension. Tlhe invention resulocs l an as~nbly whlch carries more log capacity, is more flexible to ~raxia~cior~s in log size, it, it will coop ~chem tigh~c ln the toad so they won't slip out, and carries with a reduced heiE;ht o~rer co~ven~ionsl devices curren ly av ilable.
Far thy s embodiment, I prefer to utilize a unitary elemeslt for each of the pulley means 16, 16' Iong with the gongs 26, 26 . As csn be apprecia~ced from a comparison of FIGS . 3 and 4, 10 thy tong 26' (for example) is integral with the pulley means 16 ', ha g a flange part 31 ' at its upper end . Multiple grooves Sunnumbered) are provided for the cable links 17a-17d -- see FIG. 3. These are arranged, as indicated previously relative to thy eagle links themselves, it pairs of grooves with the grooves in each pair being offset as can be best appreci ated from a consideration of FIG. 3.
A somewhat different fonn of pulley means of sheave is employed in the ~eoond embodiment of the inven~i~n as depicted in FIGS. 5-9. Where possible in these views, corresponding 20 numerals are employed for corresponding parts but with the addition of 100 to the s~umeral. Thus, in FIG. 5, the numeral 110 desi nates generally the U-shaped frame which again ls equipped ~i~ch a swivel mounting a at 112. lye pulley means are p~vo~ally mounted relative go the frame and ase generally desk atet 116 and 116', being mounted, re~pecti~rely, on shafts 1~5 and 115'. In FIG. 5~ only two o:E 'che cable li~lk8 are ~deatlfied, these by the numerals 117a (and fib The cab7e l 117a us equipped with t ferrule 119 at the end co~ec~ed to 'che pulley moan 116' and ~th a tensinn ad~us~ing 30 device such a threated sleeve and fersule a at 118 at the other end c the end co~ected to the pulley mean6 7~ .
116. Irl the same fashion ache cabie iink 117b has a ferrule equipped erld a at 120 connected to the E~ulley meat 116 and the tension adjuster at 121 at the end confected to the pulley means 116'.
It the FIG, 5 ~howin~ Le piston rod 124 is ~i-vo~ally oot~nected as at 125 to the pulley means 116' while the cylindes 122 fs pivotally moun~ced on the opposite pull~y.meæ~s 116 as at 123 adjacent the pulley means 116. Age ache tongs 8se designated, now by toe numerals 126 and 126~. In this 10 embodiment however, i~cead of ha~rlng the tongs rigidly connected to the pulley mean, links are interposed to provide a motion mulcipl~er. For thus purpose, a motion multipliex lint and reaction member are inscalled between the head and ache tongs, the multipller l being integral with the pulley means and the reaction member pivotal relative to ache pulley meaDs. These items provide or approx lately but not exelusively a 2:1 angular motion multiplication between it and the ~o~g (for each degree the link moves, the tong move 2 degrees), As can be best seen in FIG. 7, the left hand motioa multip~ per link i8 designated 132 relative Jo the left hand tong -- this being the tong 126 of FIG. 5 but in the wide open position designated g30 coxresponding to that designated 30 in F G. 4 relative to toe first embodiment. In mDving fsom the fully open po81t~on 130 through the l't~p-to-tip'~
pogi~lo~ 126 to the fully cloyed posltio~ 127, the motion multiplier link 132 moves frGm the solid live positlo~ to the dotted lone p~sitio~ designated 133. Thus l~k also oan be teen FIG. 9 a well a8 FIG. 6. In FIG. 6~ there 18 a p~otal connection as at 134 between the lower end of the ~ot~on multiplier link 132 and the tong 126.
~Z~ 9 ~7 The reaetion member or iink for the tong 126 it des~gns~ed 135 Ed is alto p~votally connected to the left hand tong (des~gna~ed 130 it FIG. 7) as at 136. At its upper end, the reaction link 135 i5 pivotal:Ly connected to the opposlte ~haf~ as at 137 which alto carries pulley meaRs 116'. Thus, the multiplying linkage includes a pair of links or each tong, one each connected to each of the pulley means 116 and 116' ad~ac~nt the upper end of each link 132, 135 and p~otally connected to the tong a the lower end as at 134 10 and 136. More particularly) the tion multiplier link 132 it connected to its associated tong (designated 130 on FIG. 7) a spaced distance below the upper end of that tong. On the other Rand, the reaction link 135 is pivotally connected at the ~rery upper end of the tong 130.
While in the forego~g specification detailed de~cr~ption of the in~ent~on has been set down for the purpose of explanation, many Yaria~ions it toe details hereingi~en Jay be made by those kited irk the art without departing from the spirit and scope of the invention.
The disadvantages of construction and use are both avoided 10 through the practice of the invention.
According to the invention the tong mounting and actuating apparatus employs a pair of pulley means eaeh rotatably mounted on the frame of the apparatus, the tongs being operatively associated with each pulley means and the pulley means being interconnected by cable means extending between the pulley means in a general figure eight configuration. Through thus mechanism, one rotation of one pulley means -- as by a fluid pressure cylinder -- produces counter rotation of the other pulley mean9.
Other ob~ect~ and advantages of the ~n~ent~on may be seen in the details of the ensuing specification.
DETAILED DESCRIPTION:
_ ; . .
The ~nvent~on i8 described it conjunction with the accompanying drawing in which --FIG. 1 is a front elevational view of appara~cusembodying teachings of the instant invent on;
FIG. 2 is a top plan Jew of the apparatus of FIG.
; . .
~12(~917~L;
FIG. 3 is a side ele~rati:onal view of the apparatus of FIG. l;
FIG. 4 a flew essentially similar to FIG. 1 bug being partially it section and showirlg the grapple witch it tongs in differerlt opes~ating modes in dotted lives;
FIG. 5 ls a frost elevational view essentially similar to that sf FIG. 1 but of anocher version of the invention;
FIG. 6 is an enlarged fragmentary side elevational o view of ache grapple arrangement of FIG. 5 as seen along the line 6-6;
FIG. 7 is a view essentially similar to FIG. 5 buy showing the tong elements in different operating modes;
FIG. 8 is on enlarged fragmentary view of one of the pulley means and fragment of the tong and l~kage of the grapple of FIG. 7 such as would be seen along the sight line 8-8 of FIG, 6, appearing with Figs. 6 and 9; and FIG. 9 is a fragmentary perspective view of one of the pulley means of the embodiment of FIGS. 5-8, appearing with Figs. 6 and 8.
In che illustration given and with reference to the first sheet of the dxawing, the numeral lO designates generally a U-6haped frame which ha ailed to the top wall 11 a swi~rel mechanism 12 Ruitable for co~nect~o~ to a hoist or the like (jot shown). Ire details of one preferred form of swi~rel can be ~ee~ on the seetio~al triew of FIG. 4.
The U-shaped frame 10 i6 equipped ~th a pair of depending walls 13 which are ap~rtured as at 14 and 14' for the rotatable mounting of shafts lS arid 15', repect~el~.
` . ~2~7~ .
Carried by each shaft 15 and 15' for.ro~atisn relate Jo the frsme 10 i8 a pulley mesns geraerally designated 16 and 16', respec~cively. The details of the pulley means 16, 16' cay be better seen in FIG. 4.
The pulley means 16, 16' are interconnected by cable meats generally deslgnated 17 (see the central portion of FIG. 1) which are arranged in essentially a figure eight configuration. As can be best appreciated from a consideration of FIGS. 2 and 3, an eYen umber of links of cable are employed o being designated 17a, 17b, to and 17d. ~ese are ~rra~ged in two pars with the cables in each pair being disposed in crisscrossed or figure eight fashion as can be best appreci-ated from a consideration of FOG. 4. Tor example, the cable link 17a it clamped at one end as at 18 to the pulley means 16 whlle the other end is cIEmped as at 19 to the second pulley ;~ean6 16' (still refersing to FIG. 4). In like fashion, the cable link 17'b i8 clamped as at 20 relative go the pulley means 16 and as at 21 relative to the pulley means 16'.
For thus purpose, the pulley means 16, 16' has 20 an interrupted periphery which can be appreciated from the perspect$ve vie of the pulley means 116' in the modified form of the invention presented in FIG. 9. In any event, the cable links are for illustration shown 88 17a-17d and are tension mounted ox the pulley means. Thy assures that motion of one pulley means develops a corresponding motion of to To develop motion of one pulley means 8S at 16, a fluid psessure cylinder 22 i8 pivotally mounted us at 23 (see the central portion of FIG. 1) on the frame 10. The cylinder unit 22 i8 equipped wlth the usual rod 24 which n is pivotslly connected as at 2~ to the pulley means .. -- 4 --16. Thus, 8 the rod 24 is exte~d~d co ro'cate ache pulley means 16 cou~ate~gloekwise, ache cable intereonnec~ioll develops a cloclwise movemen6c it the pulley movement 16~. This cay be appreci.a~ed best rom a consideration of FIÇ:. 4 and wi h ref ere~aee 'co 'che two tongs or tines 26 and 26 ' which are fixed relatl~e go the pulley mean 16, 16', respecti~Jely.
In ~TG. 49 'che solid live showing of ache tongs 26, 26 ' corresponds to chat of FIG. 1. As the rod 24 is ex~cended further, the tong 26 move co overlapping relacion 0 wlth the tong 26' aTld at Max extension occupies the dotted line position dew ated 27 it FIG. 4. The same action moves ache tong 26' 'co the position designated 27~ in FIG. 4 so that in the "closed" position of the tongs as at 27, 27 ', the - apparatus iQ able to tightly grip a log as at L which may be as small as 6'1 or less in diameter . or this purpose each of the walls 13 us extended downwardly in a general V-shape as at 28, with the wall portions 28 being conne-ted by a stiffening flange 29.
As ache rot 24 us retracted, c}te tongs move frnm the 27, 27 ' positionfi through the positions designated 26, 26 ' and ultimately to the "open" posi'cion designated in dotted lirle and marked 30 and 30' FIG. 4.
f brief, the assembly includes congs pi~rotally connected at fixed pouts on a grapple heat. A series of grooves are cast go the ~ppe~ ead of the tongs 26, 26' a~ou~d the pi-lrot point fox g pulley means. Cables are wrapped alter~atel~ over or-e tong pulley mears and under the other. This 8ssure8 that the motlon of one tong develops a correspo21di~g motlon of toe other, each cable being anchored . -- 5 --at both ends with an adjusting device provided at least at one end 'co assuse union tension. Tlhe invention resulocs l an as~nbly whlch carries more log capacity, is more flexible to ~raxia~cior~s in log size, it, it will coop ~chem tigh~c ln the toad so they won't slip out, and carries with a reduced heiE;ht o~rer co~ven~ionsl devices curren ly av ilable.
Far thy s embodiment, I prefer to utilize a unitary elemeslt for each of the pulley means 16, 16' Iong with the gongs 26, 26 . As csn be apprecia~ced from a comparison of FIGS . 3 and 4, 10 thy tong 26' (for example) is integral with the pulley means 16 ', ha g a flange part 31 ' at its upper end . Multiple grooves Sunnumbered) are provided for the cable links 17a-17d -- see FIG. 3. These are arranged, as indicated previously relative to thy eagle links themselves, it pairs of grooves with the grooves in each pair being offset as can be best appreci ated from a consideration of FIG. 3.
A somewhat different fonn of pulley means of sheave is employed in the ~eoond embodiment of the inven~i~n as depicted in FIGS. 5-9. Where possible in these views, corresponding 20 numerals are employed for corresponding parts but with the addition of 100 to the s~umeral. Thus, in FIG. 5, the numeral 110 desi nates generally the U-shaped frame which again ls equipped ~i~ch a swivel mounting a at 112. lye pulley means are p~vo~ally mounted relative go the frame and ase generally desk atet 116 and 116', being mounted, re~pecti~rely, on shafts 1~5 and 115'. In FIG. 5~ only two o:E 'che cable li~lk8 are ~deatlfied, these by the numerals 117a (and fib The cab7e l 117a us equipped with t ferrule 119 at the end co~ec~ed to 'che pulley moan 116' and ~th a tensinn ad~us~ing 30 device such a threated sleeve and fersule a at 118 at the other end c the end co~ected to the pulley mean6 7~ .
116. Irl the same fashion ache cabie iink 117b has a ferrule equipped erld a at 120 connected to the E~ulley meat 116 and the tension adjuster at 121 at the end confected to the pulley means 116'.
It the FIG, 5 ~howin~ Le piston rod 124 is ~i-vo~ally oot~nected as at 125 to the pulley means 116' while the cylindes 122 fs pivotally moun~ced on the opposite pull~y.meæ~s 116 as at 123 adjacent the pulley means 116. Age ache tongs 8se designated, now by toe numerals 126 and 126~. In this 10 embodiment however, i~cead of ha~rlng the tongs rigidly connected to the pulley mean, links are interposed to provide a motion mulcipl~er. For thus purpose, a motion multipliex lint and reaction member are inscalled between the head and ache tongs, the multipller l being integral with the pulley means and the reaction member pivotal relative to ache pulley meaDs. These items provide or approx lately but not exelusively a 2:1 angular motion multiplication between it and the ~o~g (for each degree the link moves, the tong move 2 degrees), As can be best seen in FIG. 7, the left hand motioa multip~ per link i8 designated 132 relative Jo the left hand tong -- this being the tong 126 of FIG. 5 but in the wide open position designated g30 coxresponding to that designated 30 in F G. 4 relative to toe first embodiment. In mDving fsom the fully open po81t~on 130 through the l't~p-to-tip'~
pogi~lo~ 126 to the fully cloyed posltio~ 127, the motion multiplier link 132 moves frGm the solid live positlo~ to the dotted lone p~sitio~ designated 133. Thus l~k also oan be teen FIG. 9 a well a8 FIG. 6. In FIG. 6~ there 18 a p~otal connection as at 134 between the lower end of the ~ot~on multiplier link 132 and the tong 126.
~Z~ 9 ~7 The reaetion member or iink for the tong 126 it des~gns~ed 135 Ed is alto p~votally connected to the left hand tong (des~gna~ed 130 it FIG. 7) as at 136. At its upper end, the reaction link 135 i5 pivotal:Ly connected to the opposlte ~haf~ as at 137 which alto carries pulley meaRs 116'. Thus, the multiplying linkage includes a pair of links or each tong, one each connected to each of the pulley means 116 and 116' ad~ac~nt the upper end of each link 132, 135 and p~otally connected to the tong a the lower end as at 134 10 and 136. More particularly) the tion multiplier link 132 it connected to its associated tong (designated 130 on FIG. 7) a spaced distance below the upper end of that tong. On the other Rand, the reaction link 135 is pivotally connected at the ~rery upper end of the tong 130.
While in the forego~g specification detailed de~cr~ption of the in~ent~on has been set down for the purpose of explanation, many Yaria~ions it toe details hereingi~en Jay be made by those kited irk the art without departing from the spirit and scope of the invention.
Claims (10)
1. A mounting and actuating apparatus for the tongs of a grapple or the like comprising a frame having a pair of spaced apart pulley means rotatably mounted therein, fluid pressure cylinder means on said frame connected to one of said pulley means, cable means connected to said pulley means in tensioned condition and extending between said pulley means in general figure eight configuration whereby rotation of one pulley means by said cylinder means produces counter-rotation of the other pulley means, and tong means operably associated with each pulley means.
2. The structure of claim 1 in which said tong means includes a grapple member fixed to each pulley means.
3. The structure of claim 1 in which said tong means includes a multiplying linkage including a pair of links for each tong means one each connected to each of said pulley means adjacent one link end and a grapple member connected to the other link end.
4. The structure of claim 3 in which each pair of links includes a multiplier link connected at one end to a first of said pulley means for rotation therewith, the other end of said multiplier link being pivotally connected to a first of said grapple members a spaced distance from the end thereof adjacent said first pulley means, a second of said pair of links being a reaction link mounted adjacent one end thereof in pivotal, coaxial relation to the second of said pulley means and at the other end thereof pivotally connected to said first grapple member at said adjacent end.
5. The structure of claim 1 in which each pulley means includes a sheave member equipped with axially offset grooves to accommodate said cable means.
6. The structure of claim 5 in which each sheave member is equipped with a plurality of axially offset grooves for the receipt of four cable links constituting said cable meat 9.
7. The structure of claim 5 in which the periphery of said sheave member is equipped with a notch accommodating the receipt of means for securing the ends of said cable means.
8. A mounting and actuating apparatus for the tongs of a grapple or the like comprising a generally U-shaped frame providing a top wall and depending sidewalls, swivel mounting means on said top wall, a pair of spaced apart pivot shafts rotatably mounted in said sidewalls in spaced apart relation, one on each side of said swivel means, pulley means on each shaft rotatably mounted relative to said frame and equipped with cable-receiving grooves therein, a first cable link in wrapping relation to the top of one pulley means and secured thereto and in wrapping relation to the bottom of the other pulley means and secured thereto, a second cable link being disposed in wrapping relation to the top of said other pulley means and secured thereto and in wrapping relation to the bottom of the first mentioned pulley means and secured thereto, said cable links being equally tensioned so that rotation of one pulley means develops corresponding and reverse rotation in the other pulley means, and a fluid pressure cylinder means pivotally mounted on said frame and eccentri-cally connected to one of said pulley means for rotating the same.
9. The structure of claim 8 in which tong means are operably associated with each of said pulley means.
10. The structure of claim 8 in which each cable link is equipped with tension adjusting means at at least one end thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000414484A CA1209174A (en) | 1982-10-29 | 1982-10-29 | Mounting and actuating apparatus for tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000414484A CA1209174A (en) | 1982-10-29 | 1982-10-29 | Mounting and actuating apparatus for tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1209174A true CA1209174A (en) | 1986-08-05 |
Family
ID=4123843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000414484A Expired CA1209174A (en) | 1982-10-29 | 1982-10-29 | Mounting and actuating apparatus for tongs |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1209174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4975017A (en) * | 1988-06-10 | 1990-12-04 | Brigden Alexander L | Grapple attachment |
-
1982
- 1982-10-29 CA CA000414484A patent/CA1209174A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4975017A (en) * | 1988-06-10 | 1990-12-04 | Brigden Alexander L | Grapple attachment |
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| Date | Code | Title | Description |
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| MKEX | Expiry |