US3735784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand tool for tensioning and cutting wire tie straps
Assignee: Buchanan Electrical Products Corp
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Filing: 1971-07-06
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Granted: 1973-05-29
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Expires: 1991-07-06
Abstract
Abstract A hand tool for tensioning and cutting the strap of a wire tie, the tool having a draw bar for drawing the strap to a predetermined tension and a toggel-like linkage system for actuating a strap cutting means when the strap is drawn to a predetermined tension. Means are provided for selectively adjusting the predetermined tension in finite fixed increments and for providing a vernier or fine adjustment of the predetermined tension with reference to each finite fixed increment. An operating lever adapted to actuate the toggle-like linkage system is pivotally attached to the tool''s handgrip near the remote bottom portion thereof so that the pivot point of the actuating lever is generally located below the operator''s hand when the tool is in operation.
Inventors
- 👤 E A Obuch
- 👤 W T Waddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
B; B21; B21F; B21F9/00; B21F9/02; B65; B65B; B65B13/00; B65B13/02; B65B13/025; B65B13/027
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
285 words
A strap tightening and cut-off tool wherein a draw bar draws a strap to a predetermined tension and a cut-off means is actuated in response to the attainment of said predetermined tension to sever the strip, said tool comprising: a frame; a cut-off bar mounted upon the frame for movement between a rest position and a cut-off position and including said cut-off means for cutting said strap in response to movement of the cut-off bar from the rest position to the cut-off position; means on the frame for resiliently biasing the cut-off bar toward the rest position; a cut-off link having opposite ends and pivotally mounted upon the frame at one of said ends, said cut-off link including means engaging the cut-off bar and retaining the link against pivotal movement in at least one direction when the cut-off bar is held in the rest position by said biasing means; an actuating link having opposite ends, said actuating link being pivotally mounted at one of the ends thereof upon the cut-off link at a point located between said One end of the cut-off link and the other end of the actuating link; means coupling the actuating link intermediate the ends thereof with the draw bar such that pivotal movement of the actuating link relative to the cut-off link will move the draw bar to tension the strap to said predetermined tension, whereupon further movement of the draw bar will cease in favor of a toggle-like pivotal movement of the actuating link about said coupling means and pivotal movement of said cut-off link about said one of the ends thereof to move the cut-off bar toward the cut-off position thereof against the force of said biasing means.
Claim 2
Dependent Claim
285 words
A strap tightening and cut-off tool wherein a draw bar draws a strap to a predetermined tension and a cut-off means is actuated in response to the attainment of said predetermined tension to sever the strip, said tool comprising: a frame; a cut-off bar mounted upon the frame for movement between a rest position and a cut-off position and including said cut-off means for cutting said strap in response to movement of the cut-off bar from the rest position to the cut-off position; means on the frame for resiliently biasing the cut-off bar toward the rest position; a cut-off link having opposite ends and pivotally mounted upon the frame at one of said ends, said cut-off link including means engaging the cut-off bar and retaining the link against pivotal movement in at least one direction when the cut-off bar is held in the rest position by said biasing means; an actuating link having opposite ends, said actuating link being pivotally mounted at one of the ends thereof upon the cut-off link at a point located between said One end of the cut-off link and the other end of the actuating link; means coupling the actuating link intermediate the ends thereof with the draw bar such that pivotal movement of the actuating link relative to the cut-off link will move the draw bar to tension the strap to said predetermined tension, whereupon further movement of the draw bar will cease in favor of a toggle-like pivotal movement of the actuating link about said coupling means and pivotal movement of said cut-off link about said one of the ends thereof to move the cut-off bar toward the cut-off position thereof against the force of said biasing means.
Claim 3
Dependent Claim
48 words
The invention of claim 1 wherein the cut-off bar is mounted upon the frame for pivotal movement between the rest position and the cut-off position and the cut-off means is actuated in response to pivotal movement of the cut-off bar from the rest position to the cut-off position.
Claim 4
Dependent Claim
84 words
The invention of claim 1 wherein the tool includes an actuating lever having opposite ends and pivotally mounted upon the frame at one of said ends and wherein said actuating link is mounted between said one end of the cut-off link and said one end of the actuating lever, the other end of the actuating link engaging the actuating lever adjacent the other end of the actuating lever such that the actuating link will pivot in response to pivotal movement of the actuating lever.
Claim 5
Dependent Claim
48 words
The invention of claim 3 wherein the cut-off bar is mounted upon the frame for pivotal movement between the rest position and the cut-off position and the cutting means is actuated in response to pivotal movement of the cut-off bar from the rest position to the cut-off position.
Claim 6
Dependent Claim
42 words
The invention of claim 4 wherein the frame includes a hand grip portion extending laterally from a near end adjacent the actuating link to a far end, and said one end of the actuating lever is pivotally mounted adjacent said far end.
Claim 7
Dependent Claim
58 words
The invention of claim 4 wherein said draw bar extends longitudinally along said frame and includes a laterally extending surface and said actuating link engages said lateral surface to move the draw bar in a longitudinal direction, and including means on said frame engaging the draw bar for confining movement of the draw bar to the longitudinal direction.
Claim 8
Dependent Claim
54 words
The invention of claim 4 including means for selectively adjusting said resilient biasing means, said adjusting means comprising: first means for selectively changing the biasing force of said resilient biasing means in fixed increments; and second means for effecting selective vernier adjustment of the biasing force with respect to each of said fixed increments.
Claim 9
Dependent Claim
116 words
The invention of claim 4 wherein the resilient biasing means includes a spring engaging the cut-off bar to exert a force biasing the cut-off bar to the rest position thereof; a bracket mounted upon the frame; a yoke mounted for movement relative to the bracket and coupled to the spring such that movement of the yoke will change the force of the spring upon the cut-off bar; and a cam member coupling the yoke and the bracket and being selectively rotatable between at least two predetermined angular positions to selectively move the yoke relative to the bracket whereupon the force of the spring is selectively changed in fixed increments corresponding the selected positions of the yoke.
Claim 10
Dependent Claim
61 words
The invention of claim 8 wherein the cam includes a flat surface for each predetermined angular position, the flat surfaces being spaced at different radial distances from the center of rotation of the cam, one of said flat surfaces engaging the bracket when the cam is in a corresponding angular position to locate and retain the yoke relative to the bracket.
Claim 11
Dependent Claim
48 words
The invention of claim 9 wherein the bracket is mounted for movement relative to the frame when the cam is in any of its said corresponding angular positions such that the force of the spring may be further selectively varied relative to each said fixed increment of change.
Claim 12
Dependent Claim
240 words
A strap tightening tool wherein a draw bar draws a strap to a predetermined tension only, said tool comprising: a frame; a pressure bar mounted upon the frame for movement between a first position and a second position; means on the frame for resiliently biasing the pressure bar toward the first position; a tension link having opposite ends and pivotally mounted upon the frame at one of said ends, said tension link including means engaging the pressure bar and retaining the link against pivotal movement in at least one direction when the pressure bar is held in the first position by said biasing means; an actuating link having opposite ends, said actuating link being pivotally mounted at one of the ends thereof upon the tension link at a point located between said one end of the tension link and the other end of the actuating link; means coupling the actuating link intermediate the ends thereof with the draw bar such that pivotal movement of the actuating link relative to the tension link will move the draw bar to tension the strap to said predetermined tension, whereupon further movement of the draw bar will cease in favor of a toggle-like pivotal movement of the actuating link about said coupling means and pivotal movement of said tension link about said one of the ends thereof to move the pressure bar toward the second position thereof against the force of said biasing means.
Claim 13
Dependent Claim
240 words
A strap tightening tool wherein a draw bar draws a strap to a predetermined tension only, said tool comprising: a frame; a pressure bar mounted upon the frame for movement between a first position and a second position; means on the frame for resiliently biasing the pressure bar toward the first position; a tension link having opposite ends and pivotally mounted upon the frame at one of said ends, said tension link including means engaging the pressure bar and retaining the link against pivotal movement in at least one direction when the pressure bar is held in the first position by said biasing means; an actuating link having opposite ends, said actuating link being pivotally mounted at one of the ends thereof upon the tension link at a point located between said one end of the tension link and the other end of the actuating link; means coupling the actuating link intermediate the ends thereof with the draw bar such that pivotal movement of the actuating link relative to the tension link will move the draw bar to tension the strap to said predetermined tension, whereupon further movement of the draw bar will cease in favor of a toggle-like pivotal movement of the actuating link about said coupling means and pivotal movement of said tension link about said one of the ends thereof to move the pressure bar toward the second position thereof against the force of said biasing means.
Claim 14
Dependent Claim
25 words
The invention of claim 11 wherein the pressure bar is mounted upon the frame for pivotal movement between the first position and the second position.
Claim 15
Dependent Claim
84 words
The invention of claim 11 wherein the tool includes an actuating lever having opposite ends and pivotally mounted upon the frame at one of said ends and wherein said actuating link is mounted between said one end of the tension link and said one end of the actuating lever, the other end of the actuating link engaging the actuating lever adjacent the other end of the actuating lever such that the actuating link will pivot in response to pivotal movement of the actuating lever.
Claim 16
Dependent Claim
25 words
The invention of claim 13 wherein the pressure bar is mounted upon the frame for pivotal movement between the first position and the second position.
Claim 17
Dependent Claim
42 words
The invention of claim 14 wherein the frame includes a hand grip portion extending laterally from a near end adjacent the actuating link to a far end, and said one end of the actuating lever is pivotally mounted adjacent said far end.
Claim 18
Dependent Claim
58 words
The invention of claim 14 wherein said draw bar extends longitudinally along said frame and includes a laterally extending surface and said actuating link engages said lateral surface to move the draw bar in a longitudinal direction, and including means on said frame engaging the draw bar for confining movement of the draw bar to the longitudinal direction.
Claim 19
Dependent Claim
49 words
The invention of claim 18 including means for selectively adjusting said resilient biasing means, said adjusting means comprising: first means for selectively changing the biasing force of said resilient biasing means in fixed increments; and second means for further selectively changing the biasing force relative to said finite increments.
Claim 20
Dependent Claim
130 words
The invention of claim 14 wherein the resilient biasing means includes a spring engaging the pressure bar to exert a force biasing the pressure bar to the first position thereof; a bracket mounted upon the frame; a yoke mounted for movement relative to the bracket and coupled to the spring such that movement of the yoke will change the force of the spring upon the pressure bar; a cam member coupling the yoke and the bracket and being selectively rotatable between at least two predetermined angular positions to selectively move the yoke relative to the bracket in fixed increments and retain the yoke at a selected position relative to the bracket whereupon the force of the spring is selectively changed in fixed increments corresponding the selected positions of the yoke.
Claim 21
Dependent Claim
61 words
The invention of claim 18 wherein the cam includes a flat surface for each predetermined angular position, the flat surfaces being spaced at different radial distances from the center of rotation of the cam, one of said flat surfaces engaging the bracket when the cam is in a corresponding angular position to locate and retain the yoke relative to the bracket.
Claim 22
Dependent Claim
41 words
The invention of claim 19 wherein the bracket is mounted for movement relative to the frame such that the force of the spring may be further selectively varied to effect a vernier adjustment with respect to said fixed increments of change.
Claim 23
Dependent Claim
63 words
The invention of claim 15 wherein said actuating lever includes a pair of spaced parallel sidewalls integral therewith, and said hand grip portion includes an interior recess and an opening communicating therewith for receivably engaging the side walls of said actuating lever whereby said sidewalls are respectively telescopically engaged with respect to said hand grip portion during pivotal movement of said actuating lever.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |