CA1331026C - Quick-action clamps - Google Patents
Quick-action clampsInfo
- Publication number
- CA1331026C CA1331026C CA000606266A CA606266A CA1331026C CA 1331026 C CA1331026 C CA 1331026C CA 000606266 A CA000606266 A CA 000606266A CA 606266 A CA606266 A CA 606266A CA 1331026 C CA1331026 C CA 1331026C
- Authority
- CA
- Canada
- Prior art keywords
- slide
- bar
- quick
- jaw
- lever
- 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
Links
- 238000010276 construction Methods 0.000 description 3
- 210000003811 finger Anatomy 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241000370685 Arge Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/067—C-clamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Jigs For Machine Tools (AREA)
- Discharge By Other Means (AREA)
- Press Drives And Press Lines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A clamp which is operable with one hand includes a fixed jaw and a movable jaw. The movable jaw connects to one end of a movable slide. One-way drive means, by operation of a handle grip, releasably engages the slide and advance the movable jaw toward the fixed jaw. Return motion of the movable jaw is accomplished manually when the one-way drive means is disengaged.
A braking lever, biased to bind against the slide bar, prevents reverse motion of the movable jaw except when disengaged from the slide. The handle advances the slide by driving a second lever which binds against a slide surface. The second lever returns by spring force to its original position after each stroke of the handle.
A clamp which is operable with one hand includes a fixed jaw and a movable jaw. The movable jaw connects to one end of a movable slide. One-way drive means, by operation of a handle grip, releasably engages the slide and advance the movable jaw toward the fixed jaw. Return motion of the movable jaw is accomplished manually when the one-way drive means is disengaged.
A braking lever, biased to bind against the slide bar, prevents reverse motion of the movable jaw except when disengaged from the slide. The handle advances the slide by driving a second lever which binds against a slide surface. The second lever returns by spring force to its original position after each stroke of the handle.
Description
`: :
- - .
OUICX-ACTION CL~MPS
BACXGROUND OF THE INVENTION
This invention relates generally to clamps of the type used to temporarily clamp together two art~cles, for example, for gluing, or to hold a workpiece for welding, and more particularly to quick-action clamps wherein the moving ~aw can be rapidly advanced or advances in ~mall increments of selectable length.
The concept of a bar clamp is old and well-known. In recent years, over-center toggle action handgrips have ~een incorporated for use in final tightening against the workpiece, for example, in U.S. Patents 4,088,313 by Pearson and 4,563,921 by Wallace. A
disadVantagQ ~n the prior art lles in the fact that ad~ustment ln .: ~:.....
the moving jaw over a substantial distance is cumbersome and imprecise. Freguently, the moving ~aw i~ entirely disengaged and free to move until the final tightening of an ob~ect between the movable and fixQd ~aws i8 accompli~hed. A third hand would be helpful. -The concept of a C-cl~p i8 al~o old ~nd well-~nown. A C-haped fra~e holds a fixed ~aw, and a moving ~aw is advancedtoward the fixed ~aw or retracted therefro~ by rotation of a threaded ~haft to which the moving ~aw is mounted. a disadvantage of this arrangement lie~ in the fact that when the moving ~aw has a substantial distance to travel before clampinq 1331~26 upon the workpiece or workp~eces, a great number o~ turns 18 required on the threaded 6haft ~upporting the moving ~aw.
Frequently, the handle for turning the 6haft i6 a sllde-type handle, movlng transversely to the dlrectlon o~ 6haft motion 80 that the handle can be slipped back and forth through the shaft with each half turn of the shaft. Thl6 i8 advantageous, where turnlng must be accomplished in a tlgbt spot and a full 360 swing of the handle 18 not possible. However, slide-shifting of the handle is awkward and bothersome. Bar clamps using a threaded rod for ad~ustment have similar problems.
What are needed are clamps having a moving ~aw which is rapidly movable over both short and long distances to clamp against a workpiece and is operable using one hand with complete control by the operator at all times.
SUMMARY OF THE I~VE~TION
Generally speakinq, in accordance witb the invention, C~
and bar clamps especially suitable for rapid and precise closure against a workpiece are provided. The bar clarp includes a fixed ~aw and a movable ~aw opposing the fixed ~aw. The movable ~aw connects at one end to a slide rod which is ~ovable to bring the movable ~aw toward and away from the fixed jaw. One-way drive means, by operation of a trigger handle grip, releasably engages the slide bar and advances the movable ~aw toward the fixed ~aw.
The one-way drive means is incapable of ~oving the slide bar and ~-'' ' - 133~02~ :
~ovable ~aw away from the fixed ~aw. Return motion o~ the Dovable ~aw i6 accomplished manually when the one-way drive ~eans is disengaged. A first bra~ing lever which is biased to bind agalnst the slide bar prevents rever6e ~otion Or the movable ~w away from the fixed jaw, except when the fir~t lever is disengaged fro~ the slide bar. Thus, for return motion of the jaw, it is necessary that both the one-way drive means and the first braking lever be disengaged. The trigger handle advances the slide bar by driving a 6econd lever which binds against a surface of the slide bar and moves the rod as the second lever , ....
~oves toward the fixed ~aw. The second lever is returned by , spring force to its original position after each stroke of the trigger handle, the second lever sliding over the bar surface during its return Dotion.
The C-clamp includes a fixed ~aw and a movable ~aw opposing ~-`
the fixed jaw. The movable jaw connects at one end to a slide , . : , , rod which is ~ovable to bring the movable ~aw toward and away ~ro~ the fixed jaw. A C-shaped framo includes a longltudinal bar }~arallel with the 61ido rod; a fir6t arm is attached transvorsely :~. :-.. "-:
~the longitudinal bar and extend6 to 6upport the fixed ~aw. A
~econd aru attached tran6ver6ely to tho bar extends to slidably upport the slido rod. One-way drive means, by operation of a trigger bandle grip, releasably engages the slid- rod and ~dvances t~e movable ~aw toward the fixed ~aw. The one-way drive ~eans is incapable of moving the slide rod and movable ~w away fro~ the fixed ~aw. Return motion of the movable ~aw ~8 , ~ -.'''.~.''~ '.'.`','.''~
.,,-,.,-:., ',: :, - .
1331~2~ I
accompllshed ~anually when the one-way drlve Dean~ lo dl6engaged.
A flrst lever which 1~ blased to bind against the 61ide rod prevent~ reverse motlon o~ the ~ovable ~aw away ~ro~ the flxed jaw, except when the flrst lever i~ dlsengaged fro~ the sllde rod. The trlgger handle advance6 the 61ide rod by driving a second lever whlcb binds again6t the sur~ace of the ~lide rod and ~oves the rod as the second lever move~ forward. The second lever is returned by spring force to it6 original po6ition, the second lever sliding over the rod surface during its return ~otion. m ere is no handle to rotate in a plane transverse to the motional direction of the moving ~aw as in the prlor art.
Accordingly, it is an object of this invention to provide improved quick-action bar and C-clamps wherein the moving ~aw may be moved over short and long distances rapidly.
Another o~b~ect of thi~ invention is to provide l~proved quick-action bar and C-cla~ps, wherein the ~oving ~aw may be incrementally ~nd precisely advanced from any position.
A further ob~ect of thi- invention i- to provide improved ~: ~ .. ....
quick-action bar and C-cla~ps wherein th ~cving ~aw ~ay be ~-~dvancod in incre~ents of 6electable length for each action of a ;~
driving b~ndle. ~-Yet another ob~ect of this invention i~ to provide an ~mproved quick-action bar clamp wherein tbe ~ovable ~aw doe~ not ~ove it~ weight when the clamp is in a vertic~l position.
Still another ob~ect o~ thi6 invention i~ to provide improved quick-actlon bar and C-clamps wberein cla~p operation is ~;
1331~2~ ~:
~ccomplished with one hand.
Yet another ob~ect of the invention i8 to provide basically flat bar and C-clamps which operate in narrow 6pace~
Still other ob~ect~ and advantages of the inventlon wlll ln part be obvious and wlll in part be apparent from the specification.
The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts which will be exemplified in the constructions hereinafter et forth, and the scope of the invention will be indicated in the claims.
.~.. ~, BRIEF DESCRIPTION OF THE DRAWI~GS - -For a fuller understanding of the invention, reference is ., . ~ ,-,, ~
~ad to the following description taken in connect~on with the accompanying drawings, in whicb~
.~, .. .
Figure 1 i~ ~ front view of a quick-action bar clamp in ~ccordance with the invention;
Figure 2 is a left end view to an enlarged scale of t~e guick-action bar olamp of Figure ls Figure 3 is a right end view to an enlarged scale of the guick-action bar clamp of Figure l;
Figure 4 is a sectional view to an enlarged scale taken along the line 4-4 of Figure 3; - ~
Figure 5 is a view similar to Fig. 1 of an alternative ; - ~
.:.. :,. ., .~
, .-.. .
... - : :: .
:. . -~. ~ ., . ,:.-:: :.-1331~26 embodiment o~ a quick-action bar clamp ln accordance wlth the invention;
Figure 6 i6 a ~ection view ta~en along the line 6-6 of Figure S:
Figure 7 is a sectional view taken along the line 7-7 of Figure 5;
Figure 8 iB a front view of a quick-action C-clamp in accordance with the invention:
Figure 9 is a top view of the quick-action C-clamp of Figure 8; - -~
Figure 10 is a right end view of the quick-action C-clamp of Figure 8; and Figure 11 is a fragmentary view, to a larger scale, similar to Figure 8 showing operation of the quick-action C-clamp.
DESCRIPTION OF THE PREFERRED EM~ODIMENTS
With reference to Figure6 1-7, a quick-acting bar cla~p 10 ~ncludes a mov~ble ~w 12 connected to a slide bar 14. The slide bar i~ slidably supported in a lot 16 (Fig. 4) which passes through a handle/grip assembly 18.
The handle/grip assembly 18 includes a body 19 through which the slot passes, a handgrip 20 attached to the body 19 on one side of the slot 16, and a fixed jaw 22 attached to the body 19 1331~2 6 on the other slde of the slot 16. A trigger handle 24 i8 pivotably mounted to the body 19 ad~acent the slot 16 by mean~ of a pivot pln 26. The moving ~aw 12 opposes the fixed ~aw 22.
As best illustrated in Fig. 4, the handgrlp 20 is hollow in part so as to recelve the trigger handle in the cavity 28. A
second cavity 30 in the body 19 divides the bore 16. A driving lever 32 is suspended on the slide bar 14 whlch passes through a hole 34 in the driving lever 32. A ~pring 36 i6 compressed between the driving lever 32 and a surface 38 of the cavity 30 urging the driving lever 32 agalnst the upper end 40 of the trigger handle 24. The upper end 40 of the trlgger handle 24 is forked and straddles the slide bar 14. Force of the spring 36 . . .:
urges the trigger handle 24 against an inner surface 42 of the body 19 thus providing a standby condition. In the standby condition, the driving lever 32 i8 positioned perpendicular to ~. .- ~ . .; .
the direction of motion, indicated by the arrow 44, of the slide bar 14 when in operation. Any motion of the handle 24 about the pivot pin 26 in the direction of the arrow 44 is acco~plished ;-~gainst the bias of the spring 36.
., :, .:
A braking lever 46 i~ suspende~ from the slide bar 14 which -~p~sses through an opening 48 in the brsking lever 46. One end 50 of the braXing lever 46 i8 pivotably captured in a recess 52 - -within the body 19 such that the braking lever 46 may pivot i ~ -, , ~ , . ~ . . .
within the-constraints defined by the surfaces of the recess 52 ~ -and by binding of the braking lever 46 with the slide bar 14 when ~ -the edges of the opening 48 in the lever 46 engage the surface of .,' ~'.'.''.":
. '.
: . ,:- . ':
the sllde rod 14. A 6prlng 54 6eats ln a recess 56 ln the body 19 and biases the free end of the braklng lever 46 away from the trigger handle 24. The biased positlon of the braklng lever 46 is limited by the blnding lnterference between the openlng 48 of the lever 46 wlth the slide bar 14.
It should be noted that in the standby position illustrated ~n Figure 4, the driving lever 32 i8 sub6tantially perpendicular to the longitudlnal axis of the sllde bar 14, whereas the portion of the braklnq lever 46, whlch engages the slide bar 14, is transverse to the longltudinal axis of the bar 14 but not perpendicular thereto. In this condition, if a force is applled to the moving jaw 12 in the direction indicated by the arrow 44, the slide bar 14 is free to move through the hole 34 in the driving lever 32 and throuqh the spring 36. Because the braking lever 46 is free to pivot ~gainst the bias of the spring 54 when force is applied on t~e moving ~aw 12 in the direction of the arrow 44, the braking lever 46 presents no obstacle to this ~otion of the slide bar and the moving ~aw 12 may be advanced continuoudy toward the fixed ~aw 22.
However, in the standby position a~ illustrated in Fig. 4, if a force i6 applied to the ~ovable ~aw 12 in the direction opposite to the direction indicated by the arrow 44, the edges of `-the opening 48 in the lever 46 bind against the surface of the slide bar 14 and it is not possible, without further action, to -;
withdraw the moving jaw farther away from the fixed ~aw 22, as described more fully hereinafter. Compression of the spring 56 ~.
~. .
--- 1331~26 by pressinq on the braking lever 46 ln the direction of the arrow 44, allows withdrawal of the sllde bar 14 and movable ~aw 12 away from the fixed ~aw 22. Thls force bring~ the end 50 of the lever 46 lnto perpendlcularity wlth the directlon of the lntended ~otion of the slide bar. q~he 61ide bar 14 is free to 611de in either direction through the opening 48 ln the braklng lever 46.
The trlgger handle 24 is 6queezed in the dlrectlon lndicated by the arrow 44 to incrementally advance the 61ide bar 14 with its attached movable ~aw 12 toward the fixed ~aw 22. When the ~andle 24 is squeezed between a user's hand ~not shown) and the ~andgrip 20, p~voting occurs about the pivot pin 26 and the end 40 of the trigger handle 24 moves in the direction of the arrow 44. This causes the driving lever 32 to pivot about its upper end (Fig. 4), so that the driving lever 32 is no longer perpendicular to the direction 44 of intended motion of the 611de bar 14. Pivoting the driving lever 32 compresses the spring 36 ~nd also causes the edges of the ~ole 34 through the driving lever 32 to bind against the surface of the 61ide rod 14.
Binding occur~ because the driving lever 32 i6 no longer perpendicular to the direction J.4 of the intended motion of the diae bar 14. Further motion of the triqger hanale 2~, cause6 the driving lever 32 to translate in the direction of the arrow ~.4. $his motion further compresse6 the 6pring 36, and in the , process, by means of the binding interference between the lever : .
32 and rod 14, advances the bar 14 and its connected movable ~aw 12 toward thQ fixed ~aw 22. The maximum distance of advance of ~;
.', :-',, ' ,..:
--` 1331~26 the movable ~aw 12 with one stroXe of the trlgger handle 22 i5 limited when the spring 36 i6 fully compressed or, in an alternative construction, the handle 24 etri~es the lnner sur~ace 58 of the handgrip 20.
However, the stro~e of the trigger handle 24 can be through any lesser arc, thereby diminlshing the di6tance the movable ~aw 12 travels in a 6ingle stroke in proportion to the angle of the trigger handle stroXe. Additional strokes may be applied to the trigger handle 24 of any magnitude until the ~aws 12, 22 come together or, a worXpiece (not shown) is firmly gripped between ...
t~em.
After the trigger handle 24 is fully pivoted in the direction of the arrow 44 about the pivot pin 26, release of the trigger handle 24 causes the return of the trigger handle 24, ~.
driving lever 32 and spring 36 to the position shown in Fig. 4 as a result of the compressive forces in the spring 36 urging the components toward the movable ~aw 12. ~ -A transverse pin 60 passing through the. free end of the ~lide bar 14 prevents withdrawal of the slide bar 14 from the ~lot 16 when the braking lever 46 i6 pressed in the direction of the ~rrow 44 and the movable ~aw 12 i6 manually drawn away rom the fixed ~aw 22. It should be noted that operation of the trigger handle 24 is ineffective in accomplishing any motion of .
the slide bar 14 in the direction opposite to the arrow 44.
For illustrative purposes only, protective pads 62 are shown ~ttached to the jaws 12, 22. Also for illustrative purposes, the ~" - ~;
~ ~' . -: :..-.:.
.... -1331~26 ~ovlng ~aw 12 ~nd the handle/grip assembly 18 are formed of ~alves which are held together by 6crews 68. In the lllustrated embodiment ~Fig. 4) ~n accordance with the inventlon, the slide bar 14 has a rectangular cross-6ectlon. In alternative embodiments in accordance wlth the invention, the slide bar 14 may be any shape, for example~, sguare, round, triangular, and the opening~ 34, 48 in the levers 32, 46, respectively are appropriately shaped for proper binding interference with the slide bar 14.
In summary, if it is considered that a workpiece is to be clamped between the jaws 12, 22, the movable ~aw 12 can be advanced toward the fixed jaw 26 either in one continuous motion, ~erely by pushing in the direction of the arrow 44 on the movable jaw 22 or, by operating the trigger handle 24 in a series of strokes of length to be determined by the user. ~arge ~trokes may be used at first and small strokes later as the desired pressure is applied to the workpiece. During this advancing operation, the braking lever 46 prevents any backward motion of the slide bar 14 after each advance has been completed. While tbe braking lever 46 holds the bar 14, the trigger handle 24 is released. The ~pring 36 then returns the handle 24 and driving lever 32 to the positions shown in Fig. 4, ready for another ~troke. At any time when the user desires to retract the movable jaw 12 away from the fixed ~aw 22, for example, to release a workpiece or to open the bar clamp to receive a workpiece, it is only necessary to pull on the m~vable jaw 12 in the direction opposite to the arrow 44 while slmultaneou~ly compresslng the sprlng 54 by pressing on the braklng lever 46 ln the dlrectlon of the arrow 44.
It ~hould be noted that all operations of the trigger handle 24 and braking lever 46 can be accompllshed wlth the ~ame hand while holding the bar clamp 10 with that hand. Either the index or middle finger i8 in positlon to actuate the braking lever 46 as required while the fingers encircle and contain the trigger handle 24 and handgrip 20.
As best illustrated in Figures 2 and 3, the overall quick-action bar clamp 10 in accordance with the invention is basically flat, takes up little space, and can be operated in t~ght places.
Slide bars 14 of different lengths may be used.
In Figs. 1-4, the handle/grip assembly 18 i6 formed of halves which are held together by ~crews 66 and the trigger handle 24 is solid and slips into the cavity 28 in the handgrip 20. In an alternative embodiment (Figs. 5-7), a guic~-action bar clamp 110 in accordance with the invention includes a one-piece h~ndle/grip assembly 118, which includes no lntern~l rece6s, and basically U-~baped trigger handle 124. When the trigger handle 124 is squeezed again6t the handgrip 120, as will be apparent in Fig. 7, the handle 124 moves in the direction of the arrow 144 ~nd straddles the handgrip 102. The end 150 of the braking lever ! I : - ~ ' ` :
146 pivots in ~ recess 152 in the handle/grip assembly body 119. - ~ ~
. :.
~ ~he trigger handle 124 pivots about an axis 126 and includes ~ --- ~ .
se~i-circular tables 170 which are recessed into correspondingly , .
1331~26 :~ -shaped 610ts 172 in the body 119.
operation of the bar clamp of Figs. 5-7 is the same as that ~or the embodiment of Figs. 1-4, taklng note that the reference numerals in Figs. 5-7 correspond with those numerals used in describing Figs. 1-4, wlth addition of 100 thereto.
With reference to Figures 8-11, a gulck-acting C-clamp 210 includes movable ~aw 212 connected to a slide rod 214. The slide rod 214 iB slidably supported in a bore 216 through a C-shaped frame 218.
The C-shaped frame 218 includes a horizontal bar 220, a transverse arm 222, and a second transverse arm 224 which supports the slide rod 214 as described above. A fixed ~aw 226 opposing the movable jaw 212 is fixedly connected to the arm 222.
The slide rod 214 terminate~ in a hand grip 228 used for advancing and withdrawing the movable ~aw 212 as described more fully hereinafter.
A transverse opening 230 i8 formed through the arm 224 dividing the bore 216 into two portions- A driving lever 232 i6 ~uspended on the slide rod 214 which passes through a hole 234 in the driving lever 232. A spring 236 is compressed between tho driving levor 232 and ~ surface 238 of the oponing 230 urging the driving lever 232 against an opposite surface 240 of the opening 230.
.
A trigger handle 242 pivotably mounts to the C-clamp arm 224 by a pivot pin 244, and an end 246 presses against the rear -surface of the driving lever 232. Thus, the lever 232 is acted ~ -~ ' :~ '' , ' '- ' - 13310~6 on one s~de by the spring 236 and on the other 61de by the trigger handle 242. The sprlng 236 urges the drivlng lever 232 into the position illustrated in Flgure 8 agalnst the surface 240 ~hen ln a standby 6tate, and ln th~t way force~ the trlgger handle 242 to plvot around the pln 244 to the posltlon illustrated. Any motlon of the trigger handle 242 ln the dlrection of the arrow 248 i6 accomplished again6t the blas of the sprlng 236.
A braking lever 250 is suspended from the slide rod 214 which passes through an openlng 252 in the braking lever 250.
One end 254 of the lever 250 is pivotably captured in a recess 256 in the transverse arm 224, such that the braking lever 250 ~ay pivot within constraints defined by the surfaces of the recess 256 and binding of the lever 250 with the slide rod 214, where the edges of the opening 252 engage the surface of the slide rod 214. A spring 258 seats in a recess 260 formed into the end of the C-shaped frame 18 and biases the braking lever 250 at its free end away from the transverse arm 224, leaving a gap 262 therebetween.
; It ohould be noted that in the standby position illustrated ~n Figure 8, the driving lever 232 i~ subst~antially perpendicular to the longitudinal axis of the slide rod 214, whereas the portion of the braking lever 252, which engages the slide rod 214, is transverse to the longitudinal axis of the rod 214 but not perpendicular thereto. In this condition, if a force is applied to the handgrip 228 in the direction indicated by the - 1331~26 arrow 264, the ~lide rod moves freely through the hole 234 ln the driving lever 232 and through the spring 236. Because of the cant of the braklng lever 2S0 relatlve to the dlrectlon o~ motlon 264, the braklng lever 250 presents no ob~tacle to this motion of the ~lide rod and the movlng ~aw 212 may be advanced continuously towsrd the flxed ~aw 226.
Nowever, ln the standby position as lllustrated, if a force is applied to tbe hand grip 228 in a direction which i6 opposite to the direction indicated by the arrow 264, the edges of the opening 252, urged by the spring 258, bind against the surface of the slide rod 214 and it is not possible, without further action, to withdraw the moving jaw further away from the fixed ~aw 226, as described more fully hereinafter. This further action, which allows withdrawal of the slide rod and ~ovable ~aw 212 away from the fixed ~aw 226, i6 compression of the spring 258 by presslng on the braking lever 250 in the direction of the arrow 264. This brings the end 2S4 of the lever 250 into perpendicularity with the direction of intended motion of the 611de rod 214. Then the ~lid~ rod is freQ to sllde ln either dlrection through the openlng 252 ln tbe braklng lever 250.
Th trlgger handle 242 i- sgueeze~ ln th~ dirQction .. . .
indicated by the arrow 248 in order to incre~entally aavance the ~.
~lide rod 214 with its attached movablQ ~aw 212 toward the flxed . I , . . .
~aw 226. When the handle 242 ls sgueezed between a user'~ hand (not shown) and tbe transverse arm 224, pivoting occurs about the pi~ot pln 244 and the end 246 of the trigger bandle 242 moves in :: -` 1331~26 t~e directlon o~ the arrow 264. Thl- cause~ tbe drivlng lever 232 to plvot about its upper end 266 80 that lt le no longer perpendicular to the directlon 264 o~ intended motlon of the slide rod 214. Pivoting the driving lever 232 compresses the sprlng 236 and also causes the edges of the hole 234 through the dLrive lever 232 to bind aga~nst the surface of the slidQ rod 214 ~ using the drive lever 232 to translate in the direction 264.
This motlon further compresses the spring 236, and in the process, by means of the blndlng interference between the lever 232 and rod 214, advances the rod 214 and its connected movable jaw 212 toward the fixed ~aw 26. ~Fig. 11). The maximum distance of advance of the movable jaw 212 with one stroke of the trigger handle 242 is limited when the lever 232 i8 translated ?until it rests against the surface 268 of the transverse opening 230 or the trigger handle 242 hits a stop ~not shown) on the fra?me 218.
However, the stroke of the trigger handle 242 can be through ~ny lesser ~rc thereby di?~inishing the distance the novable ~aw . tr~vel- in proportion to the angle of the trigger handle stroke.
~ additional ~trokes ray be applied to the trigger handle 2~2 o~
~ ~ ~ y nagnituae until the jaw 212, 226 con togetheir or, a orkplece (not shovn) i- fir~ly gripped betveen t~e?~
In ~u~a?ry, if it is considered that a vorkpiece is to be - clamped between the ~aws 212, 226, the ?novable ~aw 212 can be ~; . ~dvanced toward the fixed ~aw 226 either in one continuous ~otion, ~erely by pushing in thei direction of the arrow 264 on . 16 ~ i ~ ` ' .
~` 1331~26 the hand grip 228 or, by operating the trlgger handle 242 ln a ser1es of 6trokes of length to be deter~lned by the user. Large strokes may be used at first and smaller strokes later as the deslred pressure is applied to the workplece. During thls advancing operatlon, the braking lever 250 prevents any backward motion of the slide rod 214 after each advance has been completed. While the braking lever 250 holds the rod 214, the trigger handle 242 i8 released. The spring 236 then returns the handle 242 and driving lever 232 to the positions shown in Fig.
8, ready for another stroke. At any time when the user desires to retract the movable ~aw 212 away from the fixed ~aw 226, for example, to release a workpiece or to open the C-clamp to receive a workpiece, it is only necessary to pull on the hand gr$p 228 in the direction opposite to the arrow 264, while simultaneously pressing on the braklng lever 250 in the direction of arrow 264.
It should be noted that all operations of the trigger handle 242 and brak$ng lever 250 can be accomplished with the same hand while holdinq the C-cla~p 210 w$th that hand. The thumb $s in position to actuate the braking lever 250 as reguired while the fingers encircle and contain the trigger handle 242 and transverse ar~ 224.
As best illustrated in Figures 9 and 10, the overall qu$ck-action c-cIamp 210 in accordance with the invention ls basically flat, takes up little space, and can be operated in tight places.
The frame 218 can be of any conventional shape as used w$t~ C-clamps of the prior art, and the length of transverse arms 222, ` 1331G26 224 may be varied a8 well a~ the angle~ which they assumQ
relstive to the direction of motion of the sliding rod 214.
It will thus be 6een that the ob~ects set forth above, among those made apparent frou the preceding de w ription, are efficiently attained and, 61nce certain changes may be made in the above conetruction without departing from the spirit and scope of the invention, it is intended that all matter contained in the above de6cription or 6hown in the accompanylng drawings, shall be interpreted as illustrative and not in a limiting sense.
It i8 also to be under6tood that the following claims are intended to cover all the generic and specific features of the ..
invention herein described, and all statements of the scope of :
the invention which, as a matter of language, might be said to .;~
fall therebetween.
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~ ' . ` .~ ' :,-~ .' ', ~. ' .,-;
~: , , . '' ~
,'; ', ~ ': ~ ` ' ;` '' : - . . :, :~:
..'. ,-,.. :':
- - .
OUICX-ACTION CL~MPS
BACXGROUND OF THE INVENTION
This invention relates generally to clamps of the type used to temporarily clamp together two art~cles, for example, for gluing, or to hold a workpiece for welding, and more particularly to quick-action clamps wherein the moving ~aw can be rapidly advanced or advances in ~mall increments of selectable length.
The concept of a bar clamp is old and well-known. In recent years, over-center toggle action handgrips have ~een incorporated for use in final tightening against the workpiece, for example, in U.S. Patents 4,088,313 by Pearson and 4,563,921 by Wallace. A
disadVantagQ ~n the prior art lles in the fact that ad~ustment ln .: ~:.....
the moving jaw over a substantial distance is cumbersome and imprecise. Freguently, the moving ~aw i~ entirely disengaged and free to move until the final tightening of an ob~ect between the movable and fixQd ~aws i8 accompli~hed. A third hand would be helpful. -The concept of a C-cl~p i8 al~o old ~nd well-~nown. A C-haped fra~e holds a fixed ~aw, and a moving ~aw is advancedtoward the fixed ~aw or retracted therefro~ by rotation of a threaded ~haft to which the moving ~aw is mounted. a disadvantage of this arrangement lie~ in the fact that when the moving ~aw has a substantial distance to travel before clampinq 1331~26 upon the workpiece or workp~eces, a great number o~ turns 18 required on the threaded 6haft ~upporting the moving ~aw.
Frequently, the handle for turning the 6haft i6 a sllde-type handle, movlng transversely to the dlrectlon o~ 6haft motion 80 that the handle can be slipped back and forth through the shaft with each half turn of the shaft. Thl6 i8 advantageous, where turnlng must be accomplished in a tlgbt spot and a full 360 swing of the handle 18 not possible. However, slide-shifting of the handle is awkward and bothersome. Bar clamps using a threaded rod for ad~ustment have similar problems.
What are needed are clamps having a moving ~aw which is rapidly movable over both short and long distances to clamp against a workpiece and is operable using one hand with complete control by the operator at all times.
SUMMARY OF THE I~VE~TION
Generally speakinq, in accordance witb the invention, C~
and bar clamps especially suitable for rapid and precise closure against a workpiece are provided. The bar clarp includes a fixed ~aw and a movable ~aw opposing the fixed ~aw. The movable ~aw connects at one end to a slide rod which is ~ovable to bring the movable ~aw toward and away from the fixed jaw. One-way drive means, by operation of a trigger handle grip, releasably engages the slide bar and advances the movable ~aw toward the fixed ~aw.
The one-way drive means is incapable of ~oving the slide bar and ~-'' ' - 133~02~ :
~ovable ~aw away from the fixed ~aw. Return motion o~ the Dovable ~aw i6 accomplished manually when the one-way drive ~eans is disengaged. A first bra~ing lever which is biased to bind agalnst the slide bar prevents rever6e ~otion Or the movable ~w away from the fixed jaw, except when the fir~t lever is disengaged fro~ the slide bar. Thus, for return motion of the jaw, it is necessary that both the one-way drive means and the first braking lever be disengaged. The trigger handle advances the slide bar by driving a 6econd lever which binds against a surface of the slide bar and moves the rod as the second lever , ....
~oves toward the fixed ~aw. The second lever is returned by , spring force to its original position after each stroke of the trigger handle, the second lever sliding over the bar surface during its return Dotion.
The C-clamp includes a fixed ~aw and a movable ~aw opposing ~-`
the fixed jaw. The movable jaw connects at one end to a slide , . : , , rod which is ~ovable to bring the movable ~aw toward and away ~ro~ the fixed jaw. A C-shaped framo includes a longltudinal bar }~arallel with the 61ido rod; a fir6t arm is attached transvorsely :~. :-.. "-:
~the longitudinal bar and extend6 to 6upport the fixed ~aw. A
~econd aru attached tran6ver6ely to tho bar extends to slidably upport the slido rod. One-way drive means, by operation of a trigger bandle grip, releasably engages the slid- rod and ~dvances t~e movable ~aw toward the fixed ~aw. The one-way drive ~eans is incapable of moving the slide rod and movable ~w away fro~ the fixed ~aw. Return motion of the movable ~aw ~8 , ~ -.'''.~.''~ '.'.`','.''~
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1331~2~ I
accompllshed ~anually when the one-way drlve Dean~ lo dl6engaged.
A flrst lever which 1~ blased to bind against the 61ide rod prevent~ reverse motlon o~ the ~ovable ~aw away ~ro~ the flxed jaw, except when the flrst lever i~ dlsengaged fro~ the sllde rod. The trlgger handle advance6 the 61ide rod by driving a second lever whlcb binds again6t the sur~ace of the ~lide rod and ~oves the rod as the second lever move~ forward. The second lever is returned by spring force to it6 original po6ition, the second lever sliding over the rod surface during its return ~otion. m ere is no handle to rotate in a plane transverse to the motional direction of the moving ~aw as in the prlor art.
Accordingly, it is an object of this invention to provide improved quick-action bar and C-clamps wherein the moving ~aw may be moved over short and long distances rapidly.
Another o~b~ect of thi~ invention is to provide l~proved quick-action bar and C-cla~ps, wherein the ~oving ~aw may be incrementally ~nd precisely advanced from any position.
A further ob~ect of thi- invention i- to provide improved ~: ~ .. ....
quick-action bar and C-cla~ps wherein th ~cving ~aw ~ay be ~-~dvancod in incre~ents of 6electable length for each action of a ;~
driving b~ndle. ~-Yet another ob~ect of this invention i~ to provide an ~mproved quick-action bar clamp wherein tbe ~ovable ~aw doe~ not ~ove it~ weight when the clamp is in a vertic~l position.
Still another ob~ect o~ thi6 invention i~ to provide improved quick-actlon bar and C-clamps wberein cla~p operation is ~;
1331~2~ ~:
~ccomplished with one hand.
Yet another ob~ect of the invention i8 to provide basically flat bar and C-clamps which operate in narrow 6pace~
Still other ob~ect~ and advantages of the inventlon wlll ln part be obvious and wlll in part be apparent from the specification.
The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts which will be exemplified in the constructions hereinafter et forth, and the scope of the invention will be indicated in the claims.
.~.. ~, BRIEF DESCRIPTION OF THE DRAWI~GS - -For a fuller understanding of the invention, reference is ., . ~ ,-,, ~
~ad to the following description taken in connect~on with the accompanying drawings, in whicb~
.~, .. .
Figure 1 i~ ~ front view of a quick-action bar clamp in ~ccordance with the invention;
Figure 2 is a left end view to an enlarged scale of t~e guick-action bar olamp of Figure ls Figure 3 is a right end view to an enlarged scale of the guick-action bar clamp of Figure l;
Figure 4 is a sectional view to an enlarged scale taken along the line 4-4 of Figure 3; - ~
Figure 5 is a view similar to Fig. 1 of an alternative ; - ~
.:.. :,. ., .~
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... - : :: .
:. . -~. ~ ., . ,:.-:: :.-1331~26 embodiment o~ a quick-action bar clamp ln accordance wlth the invention;
Figure 6 i6 a ~ection view ta~en along the line 6-6 of Figure S:
Figure 7 is a sectional view taken along the line 7-7 of Figure 5;
Figure 8 iB a front view of a quick-action C-clamp in accordance with the invention:
Figure 9 is a top view of the quick-action C-clamp of Figure 8; - -~
Figure 10 is a right end view of the quick-action C-clamp of Figure 8; and Figure 11 is a fragmentary view, to a larger scale, similar to Figure 8 showing operation of the quick-action C-clamp.
DESCRIPTION OF THE PREFERRED EM~ODIMENTS
With reference to Figure6 1-7, a quick-acting bar cla~p 10 ~ncludes a mov~ble ~w 12 connected to a slide bar 14. The slide bar i~ slidably supported in a lot 16 (Fig. 4) which passes through a handle/grip assembly 18.
The handle/grip assembly 18 includes a body 19 through which the slot passes, a handgrip 20 attached to the body 19 on one side of the slot 16, and a fixed jaw 22 attached to the body 19 1331~2 6 on the other slde of the slot 16. A trigger handle 24 i8 pivotably mounted to the body 19 ad~acent the slot 16 by mean~ of a pivot pln 26. The moving ~aw 12 opposes the fixed ~aw 22.
As best illustrated in Fig. 4, the handgrlp 20 is hollow in part so as to recelve the trigger handle in the cavity 28. A
second cavity 30 in the body 19 divides the bore 16. A driving lever 32 is suspended on the slide bar 14 whlch passes through a hole 34 in the driving lever 32. A ~pring 36 i6 compressed between the driving lever 32 and a surface 38 of the cavity 30 urging the driving lever 32 agalnst the upper end 40 of the trigger handle 24. The upper end 40 of the trlgger handle 24 is forked and straddles the slide bar 14. Force of the spring 36 . . .:
urges the trigger handle 24 against an inner surface 42 of the body 19 thus providing a standby condition. In the standby condition, the driving lever 32 i8 positioned perpendicular to ~. .- ~ . .; .
the direction of motion, indicated by the arrow 44, of the slide bar 14 when in operation. Any motion of the handle 24 about the pivot pin 26 in the direction of the arrow 44 is acco~plished ;-~gainst the bias of the spring 36.
., :, .:
A braking lever 46 i~ suspende~ from the slide bar 14 which -~p~sses through an opening 48 in the brsking lever 46. One end 50 of the braXing lever 46 i8 pivotably captured in a recess 52 - -within the body 19 such that the braking lever 46 may pivot i ~ -, , ~ , . ~ . . .
within the-constraints defined by the surfaces of the recess 52 ~ -and by binding of the braking lever 46 with the slide bar 14 when ~ -the edges of the opening 48 in the lever 46 engage the surface of .,' ~'.'.''.":
. '.
: . ,:- . ':
the sllde rod 14. A 6prlng 54 6eats ln a recess 56 ln the body 19 and biases the free end of the braklng lever 46 away from the trigger handle 24. The biased positlon of the braklng lever 46 is limited by the blnding lnterference between the openlng 48 of the lever 46 wlth the slide bar 14.
It should be noted that in the standby position illustrated ~n Figure 4, the driving lever 32 i8 sub6tantially perpendicular to the longitudlnal axis of the sllde bar 14, whereas the portion of the braklnq lever 46, whlch engages the slide bar 14, is transverse to the longltudinal axis of the bar 14 but not perpendicular thereto. In this condition, if a force is applled to the moving jaw 12 in the direction indicated by the arrow 44, the slide bar 14 is free to move through the hole 34 in the driving lever 32 and throuqh the spring 36. Because the braking lever 46 is free to pivot ~gainst the bias of the spring 54 when force is applied on t~e moving ~aw 12 in the direction of the arrow 44, the braking lever 46 presents no obstacle to this ~otion of the slide bar and the moving ~aw 12 may be advanced continuoudy toward the fixed ~aw 22.
However, in the standby position a~ illustrated in Fig. 4, if a force i6 applied to the ~ovable ~aw 12 in the direction opposite to the direction indicated by the arrow 44, the edges of `-the opening 48 in the lever 46 bind against the surface of the slide bar 14 and it is not possible, without further action, to -;
withdraw the moving jaw farther away from the fixed ~aw 22, as described more fully hereinafter. Compression of the spring 56 ~.
~. .
--- 1331~26 by pressinq on the braking lever 46 ln the direction of the arrow 44, allows withdrawal of the sllde bar 14 and movable ~aw 12 away from the fixed ~aw 22. Thls force bring~ the end 50 of the lever 46 lnto perpendlcularity wlth the directlon of the lntended ~otion of the slide bar. q~he 61ide bar 14 is free to 611de in either direction through the opening 48 ln the braklng lever 46.
The trlgger handle 24 is 6queezed in the dlrectlon lndicated by the arrow 44 to incrementally advance the 61ide bar 14 with its attached movable ~aw 12 toward the fixed ~aw 22. When the ~andle 24 is squeezed between a user's hand ~not shown) and the ~andgrip 20, p~voting occurs about the pivot pin 26 and the end 40 of the trigger handle 24 moves in the direction of the arrow 44. This causes the driving lever 32 to pivot about its upper end (Fig. 4), so that the driving lever 32 is no longer perpendicular to the direction 44 of intended motion of the 611de bar 14. Pivoting the driving lever 32 compresses the spring 36 ~nd also causes the edges of the ~ole 34 through the driving lever 32 to bind against the surface of the 61ide rod 14.
Binding occur~ because the driving lever 32 i6 no longer perpendicular to the direction J.4 of the intended motion of the diae bar 14. Further motion of the triqger hanale 2~, cause6 the driving lever 32 to translate in the direction of the arrow ~.4. $his motion further compresse6 the 6pring 36, and in the , process, by means of the binding interference between the lever : .
32 and rod 14, advances the bar 14 and its connected movable ~aw 12 toward thQ fixed ~aw 22. The maximum distance of advance of ~;
.', :-',, ' ,..:
--` 1331~26 the movable ~aw 12 with one stroXe of the trlgger handle 22 i5 limited when the spring 36 i6 fully compressed or, in an alternative construction, the handle 24 etri~es the lnner sur~ace 58 of the handgrip 20.
However, the stro~e of the trigger handle 24 can be through any lesser arc, thereby diminlshing the di6tance the movable ~aw 12 travels in a 6ingle stroke in proportion to the angle of the trigger handle stroXe. Additional strokes may be applied to the trigger handle 24 of any magnitude until the ~aws 12, 22 come together or, a worXpiece (not shown) is firmly gripped between ...
t~em.
After the trigger handle 24 is fully pivoted in the direction of the arrow 44 about the pivot pin 26, release of the trigger handle 24 causes the return of the trigger handle 24, ~.
driving lever 32 and spring 36 to the position shown in Fig. 4 as a result of the compressive forces in the spring 36 urging the components toward the movable ~aw 12. ~ -A transverse pin 60 passing through the. free end of the ~lide bar 14 prevents withdrawal of the slide bar 14 from the ~lot 16 when the braking lever 46 i6 pressed in the direction of the ~rrow 44 and the movable ~aw 12 i6 manually drawn away rom the fixed ~aw 22. It should be noted that operation of the trigger handle 24 is ineffective in accomplishing any motion of .
the slide bar 14 in the direction opposite to the arrow 44.
For illustrative purposes only, protective pads 62 are shown ~ttached to the jaws 12, 22. Also for illustrative purposes, the ~" - ~;
~ ~' . -: :..-.:.
.... -1331~26 ~ovlng ~aw 12 ~nd the handle/grip assembly 18 are formed of ~alves which are held together by 6crews 68. In the lllustrated embodiment ~Fig. 4) ~n accordance with the inventlon, the slide bar 14 has a rectangular cross-6ectlon. In alternative embodiments in accordance wlth the invention, the slide bar 14 may be any shape, for example~, sguare, round, triangular, and the opening~ 34, 48 in the levers 32, 46, respectively are appropriately shaped for proper binding interference with the slide bar 14.
In summary, if it is considered that a workpiece is to be clamped between the jaws 12, 22, the movable ~aw 12 can be advanced toward the fixed jaw 26 either in one continuous motion, ~erely by pushing in the direction of the arrow 44 on the movable jaw 22 or, by operating the trigger handle 24 in a series of strokes of length to be determined by the user. ~arge ~trokes may be used at first and small strokes later as the desired pressure is applied to the workpiece. During this advancing operation, the braking lever 46 prevents any backward motion of the slide bar 14 after each advance has been completed. While tbe braking lever 46 holds the bar 14, the trigger handle 24 is released. The ~pring 36 then returns the handle 24 and driving lever 32 to the positions shown in Fig. 4, ready for another ~troke. At any time when the user desires to retract the movable jaw 12 away from the fixed ~aw 22, for example, to release a workpiece or to open the bar clamp to receive a workpiece, it is only necessary to pull on the m~vable jaw 12 in the direction opposite to the arrow 44 while slmultaneou~ly compresslng the sprlng 54 by pressing on the braklng lever 46 ln the dlrectlon of the arrow 44.
It ~hould be noted that all operations of the trigger handle 24 and braking lever 46 can be accompllshed wlth the ~ame hand while holding the bar clamp 10 with that hand. Either the index or middle finger i8 in positlon to actuate the braking lever 46 as required while the fingers encircle and contain the trigger handle 24 and handgrip 20.
As best illustrated in Figures 2 and 3, the overall quick-action bar clamp 10 in accordance with the invention is basically flat, takes up little space, and can be operated in t~ght places.
Slide bars 14 of different lengths may be used.
In Figs. 1-4, the handle/grip assembly 18 i6 formed of halves which are held together by ~crews 66 and the trigger handle 24 is solid and slips into the cavity 28 in the handgrip 20. In an alternative embodiment (Figs. 5-7), a guic~-action bar clamp 110 in accordance with the invention includes a one-piece h~ndle/grip assembly 118, which includes no lntern~l rece6s, and basically U-~baped trigger handle 124. When the trigger handle 124 is squeezed again6t the handgrip 120, as will be apparent in Fig. 7, the handle 124 moves in the direction of the arrow 144 ~nd straddles the handgrip 102. The end 150 of the braking lever ! I : - ~ ' ` :
146 pivots in ~ recess 152 in the handle/grip assembly body 119. - ~ ~
. :.
~ ~he trigger handle 124 pivots about an axis 126 and includes ~ --- ~ .
se~i-circular tables 170 which are recessed into correspondingly , .
1331~26 :~ -shaped 610ts 172 in the body 119.
operation of the bar clamp of Figs. 5-7 is the same as that ~or the embodiment of Figs. 1-4, taklng note that the reference numerals in Figs. 5-7 correspond with those numerals used in describing Figs. 1-4, wlth addition of 100 thereto.
With reference to Figures 8-11, a gulck-acting C-clamp 210 includes movable ~aw 212 connected to a slide rod 214. The slide rod 214 iB slidably supported in a bore 216 through a C-shaped frame 218.
The C-shaped frame 218 includes a horizontal bar 220, a transverse arm 222, and a second transverse arm 224 which supports the slide rod 214 as described above. A fixed ~aw 226 opposing the movable jaw 212 is fixedly connected to the arm 222.
The slide rod 214 terminate~ in a hand grip 228 used for advancing and withdrawing the movable ~aw 212 as described more fully hereinafter.
A transverse opening 230 i8 formed through the arm 224 dividing the bore 216 into two portions- A driving lever 232 i6 ~uspended on the slide rod 214 which passes through a hole 234 in the driving lever 232. A spring 236 is compressed between tho driving levor 232 and ~ surface 238 of the oponing 230 urging the driving lever 232 against an opposite surface 240 of the opening 230.
.
A trigger handle 242 pivotably mounts to the C-clamp arm 224 by a pivot pin 244, and an end 246 presses against the rear -surface of the driving lever 232. Thus, the lever 232 is acted ~ -~ ' :~ '' , ' '- ' - 13310~6 on one s~de by the spring 236 and on the other 61de by the trigger handle 242. The sprlng 236 urges the drivlng lever 232 into the position illustrated in Flgure 8 agalnst the surface 240 ~hen ln a standby 6tate, and ln th~t way force~ the trlgger handle 242 to plvot around the pln 244 to the posltlon illustrated. Any motlon of the trigger handle 242 ln the dlrection of the arrow 248 i6 accomplished again6t the blas of the sprlng 236.
A braking lever 250 is suspended from the slide rod 214 which passes through an openlng 252 in the braking lever 250.
One end 254 of the lever 250 is pivotably captured in a recess 256 in the transverse arm 224, such that the braking lever 250 ~ay pivot within constraints defined by the surfaces of the recess 256 and binding of the lever 250 with the slide rod 214, where the edges of the opening 252 engage the surface of the slide rod 214. A spring 258 seats in a recess 260 formed into the end of the C-shaped frame 18 and biases the braking lever 250 at its free end away from the transverse arm 224, leaving a gap 262 therebetween.
; It ohould be noted that in the standby position illustrated ~n Figure 8, the driving lever 232 i~ subst~antially perpendicular to the longitudinal axis of the slide rod 214, whereas the portion of the braking lever 252, which engages the slide rod 214, is transverse to the longitudinal axis of the rod 214 but not perpendicular thereto. In this condition, if a force is applied to the handgrip 228 in the direction indicated by the - 1331~26 arrow 264, the ~lide rod moves freely through the hole 234 ln the driving lever 232 and through the spring 236. Because of the cant of the braklng lever 2S0 relatlve to the dlrectlon o~ motlon 264, the braklng lever 250 presents no ob~tacle to this motion of the ~lide rod and the movlng ~aw 212 may be advanced continuously towsrd the flxed ~aw 226.
Nowever, ln the standby position as lllustrated, if a force is applied to tbe hand grip 228 in a direction which i6 opposite to the direction indicated by the arrow 264, the edges of the opening 252, urged by the spring 258, bind against the surface of the slide rod 214 and it is not possible, without further action, to withdraw the moving jaw further away from the fixed ~aw 226, as described more fully hereinafter. This further action, which allows withdrawal of the slide rod and ~ovable ~aw 212 away from the fixed ~aw 226, i6 compression of the spring 258 by presslng on the braking lever 250 in the direction of the arrow 264. This brings the end 2S4 of the lever 250 into perpendicularity with the direction of intended motion of the 611de rod 214. Then the ~lid~ rod is freQ to sllde ln either dlrection through the openlng 252 ln tbe braklng lever 250.
Th trlgger handle 242 i- sgueeze~ ln th~ dirQction .. . .
indicated by the arrow 248 in order to incre~entally aavance the ~.
~lide rod 214 with its attached movablQ ~aw 212 toward the flxed . I , . . .
~aw 226. When the handle 242 ls sgueezed between a user'~ hand (not shown) and tbe transverse arm 224, pivoting occurs about the pi~ot pln 244 and the end 246 of the trigger bandle 242 moves in :: -` 1331~26 t~e directlon o~ the arrow 264. Thl- cause~ tbe drivlng lever 232 to plvot about its upper end 266 80 that lt le no longer perpendicular to the directlon 264 o~ intended motlon of the slide rod 214. Pivoting the driving lever 232 compresses the sprlng 236 and also causes the edges of the hole 234 through the dLrive lever 232 to bind aga~nst the surface of the slidQ rod 214 ~ using the drive lever 232 to translate in the direction 264.
This motlon further compresses the spring 236, and in the process, by means of the blndlng interference between the lever 232 and rod 214, advances the rod 214 and its connected movable jaw 212 toward the fixed ~aw 26. ~Fig. 11). The maximum distance of advance of the movable jaw 212 with one stroke of the trigger handle 242 is limited when the lever 232 i8 translated ?until it rests against the surface 268 of the transverse opening 230 or the trigger handle 242 hits a stop ~not shown) on the fra?me 218.
However, the stroke of the trigger handle 242 can be through ~ny lesser ~rc thereby di?~inishing the distance the novable ~aw . tr~vel- in proportion to the angle of the trigger handle stroke.
~ additional ~trokes ray be applied to the trigger handle 2~2 o~
~ ~ ~ y nagnituae until the jaw 212, 226 con togetheir or, a orkplece (not shovn) i- fir~ly gripped betveen t~e?~
In ~u~a?ry, if it is considered that a vorkpiece is to be - clamped between the ~aws 212, 226, the ?novable ~aw 212 can be ~; . ~dvanced toward the fixed ~aw 226 either in one continuous ~otion, ~erely by pushing in thei direction of the arrow 264 on . 16 ~ i ~ ` ' .
~` 1331~26 the hand grip 228 or, by operating the trlgger handle 242 ln a ser1es of 6trokes of length to be deter~lned by the user. Large strokes may be used at first and smaller strokes later as the deslred pressure is applied to the workplece. During thls advancing operatlon, the braking lever 250 prevents any backward motion of the slide rod 214 after each advance has been completed. While the braking lever 250 holds the rod 214, the trigger handle 242 i8 released. The spring 236 then returns the handle 242 and driving lever 232 to the positions shown in Fig.
8, ready for another stroke. At any time when the user desires to retract the movable ~aw 212 away from the fixed ~aw 226, for example, to release a workpiece or to open the C-clamp to receive a workpiece, it is only necessary to pull on the hand gr$p 228 in the direction opposite to the arrow 264, while simultaneously pressing on the braklng lever 250 in the direction of arrow 264.
It should be noted that all operations of the trigger handle 242 and brak$ng lever 250 can be accomplished with the same hand while holdinq the C-cla~p 210 w$th that hand. The thumb $s in position to actuate the braking lever 250 as reguired while the fingers encircle and contain the trigger handle 242 and transverse ar~ 224.
As best illustrated in Figures 9 and 10, the overall qu$ck-action c-cIamp 210 in accordance with the invention ls basically flat, takes up little space, and can be operated in tight places.
The frame 218 can be of any conventional shape as used w$t~ C-clamps of the prior art, and the length of transverse arms 222, ` 1331G26 224 may be varied a8 well a~ the angle~ which they assumQ
relstive to the direction of motion of the sliding rod 214.
It will thus be 6een that the ob~ects set forth above, among those made apparent frou the preceding de w ription, are efficiently attained and, 61nce certain changes may be made in the above conetruction without departing from the spirit and scope of the invention, it is intended that all matter contained in the above de6cription or 6hown in the accompanylng drawings, shall be interpreted as illustrative and not in a limiting sense.
It i8 also to be under6tood that the following claims are intended to cover all the generic and specific features of the ..
invention herein described, and all statements of the scope of :
the invention which, as a matter of language, might be said to .;~
fall therebetween.
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Claims (33)
1. A quick acting clamp comprises a fixed jaw and an opposing movable jaw, the movable jaw being attached to one end of a slide which is movable to carry said movable jaw toward and away from said fixed jaw, and the fixed jaw being connected to support means for supporting said slide, the support means also being connected to a hand grip whereby the clamp is holdable, one-way drive means for releasably engaging and, when engaged, for advancing said slide and attached movable jaw from a first position to a second position closer to said fixed jaw, said one-way drive means comprising a driving lever acting on the slide and a trigger handle which is connected to the support means adjacent to the hand grip and cooperates with the driving lever such that actuation of the trigger handle causes the driving lever to engage and advance the slide, and a braking lever which normally engages the slide to prevent motion of the movable jaw away from the fixed jaw, but allows such motion when actuated and thereby released from the slide, the braking lever being positioned forwardly of the trigger handle in the direction of the movable jaw.
2. A quick-acting clamp as claimed in claim 1 wherein when the one-way drive means is disengaged the slide and attached movable jaw are capable of continuous motion toward and away from the fixed jaw by application of external force to the slide.
3. A quick-acting clamp as claimed in claim 1 or 2 wherein the braking lever has one end pivotably connected to the support means, and further including first bias means for urging the braking lever into engagement with the slide, withdrawal of the movable jaw away from the fixed jaw being prevented by said engagement, the braking lever being subject to release from engagement with the slide by application of an external force to the other end of the braking lever to counteract the first bias means and pivot the braking lever.
4. A quick-acting clamp as claimed in claim 1 wherein the driving lever of the one-way drive means is normally disengaged from the slide, and movement of the trigger handle in a first direction from a standby position forces the driving lever into engagement with the slide thereby moving the slide and the movable jaw toward the fixed jaw.
5. A quick-acting clamp as claimed in claim 4 wherein the one-way drive means further includes second bias means for normally urging the driving lever out of engagement with the slide, and for returning the trigger handle in a direction opposite to the aforesaid first direction to the standby position after the trigger handle is released.
6. A quick-acting clamp as claimed in claim 5 wherein the first and second biasing means are springs.
7. A quick-acting clamp as claimed in claim 1, 2 or 4 wherein the distance of slide advance for each actuation of the handle is directly related to the magnitude of handle motion.
8. A quick-acting clamp as claimed in claim 1, 2 or 4 wherein the engagement between the respective levers and the slide result from mechanical interference between the slide and the levers.
9. A quick-acting clamp as claimed in claim 1, 2 or 4 wherein the slide passes through respective openings in each of the levers and the engagement therebetween results from binding of the surface of the slide with edges of each of the openings.
10. A quick-acting bar clamp comprising:
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and attached movable jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged;
said one way drive means having a driving lever, and a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, and when disengaging said slide bar allowing advancement of said movable jaw away from said fixed jaw, said braking lever having an engaging portion extending outwardly from said support means, a trigger handle pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said support means including a handgrip, a trigger-type relationship existing between said trigger handle and said handgrip, said bar clamp being holdable at said handgrip, said braking lever and the trigger handle being selectively operable by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and attached movable jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged;
said one way drive means having a driving lever, and a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, and when disengaging said slide bar allowing advancement of said movable jaw away from said fixed jaw, said braking lever having an engaging portion extending outwardly from said support means, a trigger handle pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said support means including a handgrip, a trigger-type relationship existing between said trigger handle and said handgrip, said bar clamp being holdable at said handgrip, said braking lever and the trigger handle being selectively operable by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
11. A quick-acting bar clamp as claimed in claim 10 wherein said slide bar and attached movable jaw move together and being subject to reciprocal motion toward and away from said fixed jaw when said one way drive means is disengaged by application of external forces to said slide bar, said slide bar being capable of moving said movable jaw in continuous motion.
12. A quick-acting bar clamp as claimed in claim 10 wherein said one-way drive means advances said moving jaw toward said fixed jaw in increments.
13. A quick-acting bar clamp as claimed in claim 11 wherein said one-way drive means advances said moving jaw toward said fixed jaw in increments.
14. A quick-acting bar clamp as claimed in claim 10 wherein said braking lever has one end thereof pivotably connected to said support means, and further including first bias means for urging said braking lever into said engagement with said bar, withdrawal of said movable jaw away from said fixed jaw being prevented by said engagement, said braking lever being subject to release from engagement with said slide bar by application of an external force to the other end of said braking lever, said force counteracting said first bias means and pivoting said braking lever.
15. A quick-acting bar clamp as claimed in claim 14 wherein said one-way drive means includes a driving lever normally disengaged from said slide rod, and a trigger handle pivotably mounted to said support means and contacting said driving lever, pivoting said handle in a first direction from a standby position forcing said driving lever into engagement with said slide rod, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw.
16. A quick-acting bar clamp as claimed in claim 15 wherein said one-way drive means further includes second bias means for normally urging said driving lever out of engagement with said slide bar, and for returning said trigger handle in a direction opposite to said first direction to said standby position after trigger handle operation.
17. A quick-acting bar clamp as claimed in claim 15 wherein the distance of said slide bar advance for each actuation of said handle is directly related to the magnitude of handle motion.
18. A quick-acting bar clamp as claimed in claim 14 wherein said engagements between said levers and said slide bar result from mechanical interference with binding between said bar and levers.
19. A quick-acting bar clamp comprising:
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and movable jaw from a first position to a second position closer to said fixed jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged, said one-way drive means including a driving lever, and a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, said braking lever having one end thereof pivotably connected to said support means and the other end forming an engaging portion extending outwardly from said support means, a trigger handle, pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, pivoting said handle in a first direction from a standby position forcing said driving lever into engagement with said slide rod, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said support means includes a handgrip, a trigger-type relationship existing between said trigger handle and said handgrip, said bar clamp being holdable at said handgrip, and the trigger handle and braking lever being operable selectively by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and movable jaw from a first position to a second position closer to said fixed jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged, said one-way drive means including a driving lever, and a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, said braking lever having one end thereof pivotably connected to said support means and the other end forming an engaging portion extending outwardly from said support means, a trigger handle, pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, pivoting said handle in a first direction from a standby position forcing said driving lever into engagement with said slide rod, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said support means includes a handgrip, a trigger-type relationship existing between said trigger handle and said handgrip, said bar clamp being holdable at said handgrip, and the trigger handle and braking lever being operable selectively by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
20. A quick-acting bar clamp comprising:
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and movable jaw from a first position to a second position closer to said fixed jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged, said one-way drive means having a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, said braking lever has one end thereof pivotably connected to said support means and the other end forming an engaging portion extending outwardly from said support means, and further including first bias means for urging said braking lever into said engagement with said bar, withdrawal of said movable jaw away from said fixed jaw being prevented by said engagement, said braking lever being subject to release from engagement with said slide bar by application of an external force to the other end of said braking lever, said one-way drive means also including a driving lever normally disengaged from said slide rod, and a trigger handle pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, pivoting said trigger handle in a first direction from a standby position forces said driving lever into engagement with said slide rod, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said one-way drive means further including second bias means for normally urging said driving lever out of engagement with said slide bar, and for returning said trigger handle in a direction opposite to said first direction to said standby position after trigger handle operation, said support means including a handgrip, a trigger-type relationship existing between said handle and said handgrip, said bar clamp being holdable at said handgrip, the trigger handle and the braking lever being operable selectively by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
a fixed jaw;
a movable jaw for opposing said fixed jaw;
a slide bar, said movable jaw being mounted on one end of said slide bar, said slide bar being movable to bring said movable jaw toward and away from said fixed jaw;
support means for supporting said slide bar, said fixed jaw being connected to said support means;
one-way drive means for releasably engaging and, when engaged, for advancing said slide bar and movable jaw from a first position to a second position closer to said fixed jaw, said movable jaw being subject to advancement toward said fixed jaw when said one-way drive means is disengaged, said one-way drive means having a braking lever normally engaging said slide rod, said braking lever when engaging said slide bar preventing motion of said movable jaw away from said fixed jaw, said braking lever has one end thereof pivotably connected to said support means and the other end forming an engaging portion extending outwardly from said support means, and further including first bias means for urging said braking lever into said engagement with said bar, withdrawal of said movable jaw away from said fixed jaw being prevented by said engagement, said braking lever being subject to release from engagement with said slide bar by application of an external force to the other end of said braking lever, said one-way drive means also including a driving lever normally disengaged from said slide rod, and a trigger handle pivotably mounted to said support means rearwardly of said braking lever and contacting said driving lever, pivoting said trigger handle in a first direction from a standby position forces said driving lever into engagement with said slide rod, said engaged driving lever moving said slide rod and said movable jaw toward said fixed jaw, said one-way drive means further including second bias means for normally urging said driving lever out of engagement with said slide bar, and for returning said trigger handle in a direction opposite to said first direction to said standby position after trigger handle operation, said support means including a handgrip, a trigger-type relationship existing between said handle and said handgrip, said bar clamp being holdable at said handgrip, the trigger handle and the braking lever being operable selectively by the same hand in such a manner that one of the index and middle fingers is positioned on the engaging portion of the braking lever to actuate the braking lever, while the other fingers encircle and contain the trigger handle and the handgrip.
21. A quick-acting bar clamp as claimed in claim 20 wherein said slide bar is slidably supported by said support means, said slide bar and movable jaw moving together and being subject to reciprocal motion toward and away from said fixed jaw when said one-way drive means is disengaged by application of external forces to said slide bar, said slide bar being capable of moving said movable jaw in continuous motion.
22. A quick-acting bar clamp as claimed in claim 20 wherein said one-way drive means advances said moving jaw toward said fixed jaw in increments.
23. A quick-acting bar clamp as claimed in claim 21 wherein said one-way drive means advances said moving jaw toward said fixed jaw in increments.
24. A quick-acting bar clamp as claimed in claim 20 wherein the distance of said slide bar advance for each actuation of said handle is directly related to the magnitude of handle motion.
25. A quick-acting bar clamp as claimed in claim 20 wherein said engagements between said levers and said slide bar result from mechanical interference with binding between said bar and levers.
26. A quick-acting bar clamp as claimed in claim 20 wherein said slide bar passes through respective openings in each of said levers and said engagements result from binding of the surface of said bar with edges of said openings.
27. A quick-acting bar clamp as claimed in claim 20 wherein said first and second biasing means are springs.
28. A quick-acting bar clamp as claimed in claim 26 wherein said opening edges do not bind when said levers are oriented perpendicular to said bar motion where said bar passes through said opening.
29. A quick-acting bar clamp as claimed in claim 20 wherein said other end of said braking lever is positioned on the opposite side of said handle from said handgrip, said clamp being supportable and one of said handle and said braking lever being selectively operable concurrently by an operator using one hand and gripping said grip.
30. A quick-acting bar clamp as claimed in claim 20 wherein said second bias means is a coiled spring riding on said slide bar and compressed between said driving lever and said support means.
31. A quick-acting bar clamp as claimed in claim 20 wherein said first bias means is a spring compressed between said braking lever and said support means.
32. A quick-acting bar clamp as claimed in claim 22 wherein said increments are selectable in length within predetermined limits.
33. A quick-acting bar clamp as claimed in claim 23 wherein said increments are selectable in length within predetermined limits.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23017888A | 1988-08-09 | 1988-08-09 | |
| US230,178 | 1988-08-09 | ||
| US234,173 | 1988-08-19 | ||
| US07/234,173 US4926722A (en) | 1988-08-19 | 1988-08-19 | Quick-action bar clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1331026C true CA1331026C (en) | 1994-07-26 |
Family
ID=26923995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000606266A Expired - Lifetime CA1331026C (en) | 1988-08-09 | 1989-07-20 | Quick-action clamps |
Country Status (17)
| Country | Link |
|---|---|
| CN (1) | CN1034318C (en) |
| AU (1) | AU609367B2 (en) |
| BE (1) | BE1003185A5 (en) |
| BR (1) | BR8903624A (en) |
| CA (1) | CA1331026C (en) |
| CH (1) | CH679215A5 (en) |
| CY (1) | CY1745A (en) |
| DE (2) | DE8915949U1 (en) |
| DK (1) | DK173524B1 (en) |
| ES (1) | ES2014369A6 (en) |
| FR (1) | FR2635289B1 (en) |
| GB (1) | GB2221641B (en) |
| HK (1) | HK134593A (en) |
| IE (1) | IE63977B1 (en) |
| IT (1) | IT1231639B (en) |
| MX (1) | MX171375B (en) |
| NL (1) | NL193057C (en) |
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|---|---|---|---|---|
| US5170682A (en) | 1988-08-19 | 1992-12-15 | Petersen Manufacturing Co., Inc. | Quick action bar clamp |
| DE8910878U1 (en) * | 1989-09-12 | 1989-12-21 | Richard, Matthias, 3559 Hatzfeld | One-hand quick-release clamp |
| US5094131A (en) * | 1990-02-14 | 1992-03-10 | Petersen Manufacturing Co., Inc. | Hand tool or improved bar clamp |
| GB2273073B (en) * | 1990-02-15 | 1994-08-31 | Petersen Mfg | Quick action bar clamp |
| GB2278566A (en) * | 1993-06-01 | 1994-12-07 | Michael Geoffrey Ede | Clamp |
| US5454551A (en) * | 1993-11-10 | 1995-10-03 | Hobday Clamp Company | Clamping device |
| DE9407154U1 (en) * | 1994-04-29 | 1994-06-30 | Brunner, Heinz, 91639 Wolframs-Eschenbach | Clamp, especially screw clamp |
| FR2730240A1 (en) | 1995-02-07 | 1996-08-09 | Atochem Elf Sa | STABILIZATION OF A POLYMER BY A STABLE FREE RADICAL |
| GB2302835A (en) * | 1995-07-05 | 1997-02-05 | Lii Liang Kuen | C clamp |
| DE19543621A1 (en) * | 1995-11-23 | 1997-08-21 | Johannes Drake | Quick-catch clamp with basic body and handle |
| DE29603811U1 (en) * | 1996-03-01 | 1996-04-18 | Drake, Johannes, 33106 Paderborn | Clamp for one-hand operation |
| DE19731579A1 (en) * | 1997-07-23 | 1999-01-28 | Wolfcraft Gmbh | Clamping tool, especially clamp, vice or table |
| DE19735336A1 (en) | 1997-08-14 | 1999-02-18 | Wolfcraft Gmbh | Work table |
| DE29821110U1 (en) | 1998-11-25 | 2000-04-06 | Wolfcraft GmbH, 56746 Kempenich | One-handed clamp |
| GB2353492A (en) * | 1999-08-26 | 2001-02-28 | Sammons Ronald Charles | Clamp with jacking assembly |
| EP1253994B1 (en) | 2000-02-02 | 2007-05-02 | BESSEY Tool GmbH & Co. KG | Clamping device |
| GB2381231A (en) * | 2001-10-23 | 2003-04-30 | Fever Ind Co Ltd | Bar clamp |
| DE10335354B4 (en) * | 2003-08-01 | 2005-05-12 | Irwin Industrial Tools Gmbh | Incremental gear for a clamping/expansion tool, especially a clamp clip, comprises an actuation arm that can be actuated with two lifting configurations, and a device for shifting from a first to a second lifting configuration |
| DE10335351B4 (en) * | 2003-08-01 | 2007-05-24 | Irwin Industrial Tools Gmbh | Step transmission with a driver and tool, in particular clamping clamp |
| DE10335353B4 (en) * | 2003-08-01 | 2007-03-01 | Irwin Industrial Tools Gmbh | Stepping gear with large increment |
| DE10335365A1 (en) * | 2003-08-01 | 2005-02-24 | Irwin Industrial Tools Gmbh | Incremental gear for a clamping/expansion tool, especially a clamp clip, comprises an actuation arm that can be actuated with two lifting configurations, and a device for shifting from a first to a second lifting configuration |
| EP2347859A1 (en) | 2003-08-01 | 2011-07-27 | Irwin Industrial Tools GmbH | Stepping gear for a tensioning and/or spreading tool and tensioning and/or spreading tool |
| DE10335352B4 (en) * | 2003-08-01 | 2005-04-28 | Irwin Ind Tools Gmbh | Stepping drive esp. for clamp clip etc. has actuator arm and driver part connected via pref. pressure bar or helical spring |
| DE10358302B4 (en) * | 2003-12-12 | 2009-10-01 | Irwin Industrial Tools Gmbh | Drive for clamping and / or spreading tool with activation device |
| DE10358303A1 (en) * | 2003-12-12 | 2005-07-14 | Irwin Industrial Tools Gmbh | Clamping and spreading device for single-handed use, comprising locking element with friction surface and ratchet mechanism |
| DE10358296B4 (en) * | 2003-12-12 | 2007-11-22 | Irwin Industrial Tools Gmbh | Clamping and / or spreading tool |
| DE102004024862A1 (en) | 2004-05-19 | 2006-01-05 | Irwin Industrial Tools Gmbh | Clamping and / or spreading tool |
| GB2425805A (en) * | 2005-05-07 | 2006-11-08 | Nigel Hollis | Sliding clamping device |
| US7784774B2 (en) | 2006-04-19 | 2010-08-31 | Irwin Industrial Tool Company | Assembly method and apparatus |
| GB2438581A (en) * | 2006-05-31 | 2007-12-05 | Colebrook Bosson Saunders Prod | Adjustable support bracket for a flat-screen monitor |
| DE102006027932A1 (en) | 2006-06-14 | 2007-12-20 | Aixtron Ag | Method for the deposition of layers in a process chamber used in the production of electronic components comprises using a first starting material containing two beta-diketones and a diene coordinated with a ruthenium atom |
| US9079464B2 (en) * | 2011-11-21 | 2015-07-14 | Jpw Industries Inc. | Portable work holding device and assembly |
| CN102672503A (en) * | 2012-05-04 | 2012-09-19 | 南京德朔实业有限公司 | Quick clamping device applicable to work surface |
| CN103883598A (en) * | 2014-04-15 | 2014-06-25 | 王光树 | Fastening device |
| DE202016000066U1 (en) | 2016-01-07 | 2017-04-10 | Wilfried Schertel | Quick Gripping Tripod |
| CN107569805B (en) * | 2017-09-06 | 2023-08-04 | 苏州烁耀电子材料有限公司 | Fire-fighting lance support of adjustable arbitrary angle |
| CN111571468A (en) * | 2019-02-18 | 2020-08-25 | 杭州巨星科技股份有限公司 | Tooth type F clamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2323654A (en) * | 1940-12-26 | 1943-07-06 | Albert M Rex | Clamping tool |
| US2688351A (en) * | 1951-11-19 | 1954-09-07 | Theodore R Sweet | Spring loaded ratchet clamp |
| US3427016A (en) * | 1967-03-17 | 1969-02-11 | Harold D Harris | Ratchet clamp vernier |
| GB1408886A (en) * | 1971-11-04 | 1975-10-08 | Ici Ltd | Panel-making device |
| CH610232A5 (en) * | 1975-01-27 | 1979-04-12 | Erich K Schmitter | |
| GB1472278A (en) * | 1975-05-13 | 1977-05-04 | Stebbings L | Vices and hand operated clamping tools |
| GB1555455A (en) * | 1976-06-11 | 1979-11-07 | Cox Mastic Appliances Ltd P C | Dispensing gun |
| GB1544156A (en) * | 1976-09-06 | 1979-04-11 | Mcgrath L | Tension clamp |
| US4220322A (en) * | 1979-02-08 | 1980-09-02 | Hobday Harold W | One-hand operated, ratchet-actuated, quick-set C-clamp |
| GB2178689B (en) * | 1985-06-04 | 1989-07-05 | David John Richmond | Clamps |
| DE8703379U1 (en) * | 1987-03-06 | 1987-07-23 | Löw, Johann, 8261 Emmerting | Spring clamps |
| GB2204822B (en) * | 1987-03-31 | 1991-10-09 | Duracell Int | Holders |
| GB8710129D0 (en) * | 1987-04-29 | 1987-06-03 | Rhombus Tools Ltd | Clamp |
-
1989
- 1989-05-30 DE DE8915949U patent/DE8915949U1/en not_active Expired - Lifetime
- 1989-05-30 DE DE3917473A patent/DE3917473C2/en not_active Expired - Lifetime
- 1989-06-02 GB GB8912692A patent/GB2221641B/en not_active Expired - Lifetime
- 1989-06-29 IE IE211189A patent/IE63977B1/en not_active IP Right Cessation
- 1989-06-30 CH CH2431/89A patent/CH679215A5/de not_active IP Right Cessation
- 1989-07-11 AU AU37972/89A patent/AU609367B2/en not_active Ceased
- 1989-07-11 IT IT8948178A patent/IT1231639B/en active
- 1989-07-18 NL NL8901856A patent/NL193057C/en not_active IP Right Cessation
- 1989-07-20 CA CA000606266A patent/CA1331026C/en not_active Expired - Lifetime
- 1989-07-21 BR BR898903624A patent/BR8903624A/en not_active IP Right Cessation
- 1989-07-21 MX MX016886A patent/MX171375B/en unknown
- 1989-07-25 FR FR8909986A patent/FR2635289B1/en not_active Expired - Lifetime
- 1989-07-26 DK DK198903680A patent/DK173524B1/en not_active IP Right Cessation
- 1989-07-28 ES ES8902672A patent/ES2014369A6/en not_active Expired - Lifetime
- 1989-08-05 CN CN89106146.0A patent/CN1034318C/en not_active Expired - Fee Related
- 1989-08-09 BE BE8900854A patent/BE1003185A5/en not_active IP Right Cessation
-
1993
- 1993-12-09 HK HK1345/93A patent/HK134593A/en not_active IP Right Cessation
-
1994
- 1994-06-03 CY CY174594A patent/CY1745A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB8912692D0 (en) | 1989-07-19 |
| DE8915949U1 (en) | 1992-08-06 |
| IT1231639B (en) | 1991-12-18 |
| FR2635289A1 (en) | 1990-02-16 |
| MX171375B (en) | 1993-10-21 |
| BR8903624A (en) | 1990-03-13 |
| NL8901856A (en) | 1990-03-01 |
| CN1040342A (en) | 1990-03-14 |
| GB2221641A (en) | 1990-02-14 |
| CN1034318C (en) | 1997-03-26 |
| AU3797289A (en) | 1990-02-15 |
| CH679215A5 (en) | 1992-01-15 |
| DK368089D0 (en) | 1989-07-26 |
| NL193057B (en) | 1998-05-06 |
| CY1745A (en) | 1994-06-03 |
| NL193057C (en) | 1998-09-08 |
| DE3917473A1 (en) | 1990-02-15 |
| HK134593A (en) | 1993-12-17 |
| IT8948178A0 (en) | 1989-07-11 |
| IE892111L (en) | 1990-02-09 |
| FR2635289B1 (en) | 1993-05-14 |
| AU609367B2 (en) | 1991-04-26 |
| BE1003185A5 (en) | 1992-01-07 |
| GB2221641B (en) | 1992-10-14 |
| DK368089A (en) | 1990-02-10 |
| ES2014369A6 (en) | 1990-07-01 |
| DK173524B1 (en) | 2001-01-29 |
| DE3917473C2 (en) | 1994-10-13 |
| IE63977B1 (en) | 1995-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |