CA1177625A - One piece plastic strap - Google Patents
One piece plastic strapInfo
- Publication number
- CA1177625A CA1177625A CA000413561A CA413561A CA1177625A CA 1177625 A CA1177625 A CA 1177625A CA 000413561 A CA000413561 A CA 000413561A CA 413561 A CA413561 A CA 413561A CA 1177625 A CA1177625 A CA 1177625A
- Authority
- CA
- Canada
- Prior art keywords
- pawl
- strap
- slot
- locking device
- engagement
- 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
Links
Landscapes
- Clamps And Clips (AREA)
Abstract
ONE PIECE PLASTIC STRAP
ABSTRACT OF THE DISCLOSURE
A plastic strap has a locking device at one end defining a slot into which a flexible portion of the strap can be introduced and locked by teeth of the strap being engaged by a pawl of the locking device.
The pawl has an engagement portion by which it can be moved to release the strap. To facilitate such movement of the pawl by pressing on the engagement portion to release it, the locking device has a bracing portion in opposed relationship to the engagement portion so that the pawl and bracing portion can be squeezed between the thumb and fore-finger.
ABSTRACT OF THE DISCLOSURE
A plastic strap has a locking device at one end defining a slot into which a flexible portion of the strap can be introduced and locked by teeth of the strap being engaged by a pawl of the locking device.
The pawl has an engagement portion by which it can be moved to release the strap. To facilitate such movement of the pawl by pressing on the engagement portion to release it, the locking device has a bracing portion in opposed relationship to the engagement portion so that the pawl and bracing portion can be squeezed between the thumb and fore-finger.
Description
1 177~2~
This invention is concerned wlth a one-piece plastic strap comprising an elongated flexible portion having teeth formed along a surface of at least a portion thereof, and a locking device defining a slot into which a ~ree end of the flexible portion can be introduced and locked in the slot so that the strap forms a retaining loop, the slot of the locking device being defined by a base portion of the locking device, two parallel leg portions extending from the base portion, and a pawl portion integral with and supported by the leg portions for ` pivoting movement therebetween, the pawl portion comprising a locking portion arranged to interengage one or more of the teeth of the flexible portion within the slot thereby locking the flexible portion against movement relat1ve to the slot, and an engagement portion engageable to cause the pawl pOrtiGn to pivot between the leg portions so that the interengagement of the locking portion and the teeth is released.
When one-piece plastic straps as described above are used, it is desirable that the pawl portion should maintain its interengagement with the teeth until positively released so that the strap will not come accidently undone. However, it is also desirable that the strap should be easily undone when required. Existing straps are often difficult to undo because, when pressure is applied to the engagement portion of the pawl portion, rather than the pawl portion pivoting relative to the leg portions, the whole locking device moves with the flexible portion flexing without the pawl portion releasing its interengagement.
It is an object of the pre~sent invention to provide a strap which is easier to undo than existing straps.
The invention provides that the locking device also comprises a - bracing portion in opposed relationship to the engagement portion of the pawl portion, the bracing portion being rigidly connected to the leg portions thereby providing that, when the engagement portion of ~, ~
. . .
pawl portion and the bracing portion are pressed together, the pawl portion pivots releasing the interengagement of the locking portion and the teeth.
In order to increase the ease with whlch the strap can be undone, the bracing portion comprises two lugs, one on each side of the engagement portion of the pawl portion, the engagement portion being movable to a position between the lugs to pivot the pawl portion.
The invention gives the advantage that the strap is easier to undo than existing straps. In particular, the engagement portion and the bracing portion can be squeezed between the thumb and first finger to undo the strap.
An example of the embodiment of the invention is shown in the accompanying drawings, and is described in greater detail below:
In the drawings:
Figure 1 is a side elevational view, partly 1n section, of a strap in accordance with the invention showing the strap forming a retaining loop;
Figure 2 is a longitudinal cross-section view of the strap shown in Figure 1 showing it in a straightened condition; and Figure 3 is a view taken in the direction of the arrow III in Figure 2.
The one-piece plastic strap shown in the drawings comprises an elongated flexible portion 4 having teeth 6 formed along a surface of a central portion thereof. The flexible portion 4 has a free end portion 8 provided with roughened surfaces so that the portion 8 can be readily gripped and pulled for the purpose of tightening the strap.
The flexible portion 4 extends from a fixing portion 10 of the strap which enables the strap to be secured to a headed stud (not shown) projecting from a support. The fixing portion 10 defines a keyhole-shaped slot 12 into which the stud is introduced. To fix the strap, 1 177~2~
the strap is moved so that the stud enters the narrow end of the slot 12 and is retained therein by a stud-locking portion 14 of the fixing portion 10. It should be noted that the fixing portion 10 is optional and need not be ;ncluded if it will not be desired to fix the strap to a stud.
The strap also comprises a locking device 16 joined to the fixing portion 10 by a flexible portion 18. The locking device defines a slot 20 into which the free end portion 8 of the flexible portion 4 can be introduced and locked in the slot 20 so that the strap forms a retaining loop as shown in Figure 1. The strap is wrapped around a workpiece or workpieces to be retained in forming the loop.
The slot 20 of the locking dev;ce 16 is defined by a base portion 22 of the locking device 16, two parallel leg portions 24 extending from the base portion 22, and a pawl portion 26 integral with and supported by the leg portions 24 for pivoting movement therebetween.
The pivoting movement is accommodated by flexing of the interconnections 28 between the pawl portion 26 and the leg portions 24.
The pawl portion 26 comprises a locking portion 30 in the form of a tooth which is arranged to interengage with the teeth 6 of the flexible portion 4 within the slot 20 thereby locking the flexible portion 4 against movement relative to the slot 20. The teeth 6 and 30 are so arranged that, if the flexible portion 4 is moved so as to tighten the loop formed by the strap, the pawl portion 26 pivots releasing the interengagement of the teeth 6 and 30 and allowing the movement but, if the movement is in the strap undoing direction, the teeth 6 and 30 lock together preventing the movement. The pawl portion 26 also comprises an engagement portion 32 engageable to cause the pawl portion 26 to pivot between the leg portions 24 so that the interengagement of the teeth 6 and 30 is released.
The locking device 16 also comprises a bracing portion provided ;
l 177~5 by two lugs 34 which form contlnuations of the leg portions 24 one on each side of the engageMent portion 32 of the pawl portion 26. The bracing portion is in opposed relationship to the engagement portion 32 and is rigidly connected to the leg portions 24. This arrangement provides that, when the engagement portion 32 and the bracing portion are pressed together (for example between the finger and the thumb), the pawl portion 26 pivots releasing the interengagement of the teeth 6 and 30. The engagement portion 32 moves to a position between the lugs 34 to pivot the pawl portion 26. Because pressure is applied to a rigid portion of the locking device 16 as well as to the pawl portion 26, there is no possibility that the pressure applied to the pawl portion 26 will move the entire locking device 16 ratKer than causing the pawl portion to pivot.
;
This invention is concerned wlth a one-piece plastic strap comprising an elongated flexible portion having teeth formed along a surface of at least a portion thereof, and a locking device defining a slot into which a ~ree end of the flexible portion can be introduced and locked in the slot so that the strap forms a retaining loop, the slot of the locking device being defined by a base portion of the locking device, two parallel leg portions extending from the base portion, and a pawl portion integral with and supported by the leg portions for ` pivoting movement therebetween, the pawl portion comprising a locking portion arranged to interengage one or more of the teeth of the flexible portion within the slot thereby locking the flexible portion against movement relat1ve to the slot, and an engagement portion engageable to cause the pawl pOrtiGn to pivot between the leg portions so that the interengagement of the locking portion and the teeth is released.
When one-piece plastic straps as described above are used, it is desirable that the pawl portion should maintain its interengagement with the teeth until positively released so that the strap will not come accidently undone. However, it is also desirable that the strap should be easily undone when required. Existing straps are often difficult to undo because, when pressure is applied to the engagement portion of the pawl portion, rather than the pawl portion pivoting relative to the leg portions, the whole locking device moves with the flexible portion flexing without the pawl portion releasing its interengagement.
It is an object of the pre~sent invention to provide a strap which is easier to undo than existing straps.
The invention provides that the locking device also comprises a - bracing portion in opposed relationship to the engagement portion of the pawl portion, the bracing portion being rigidly connected to the leg portions thereby providing that, when the engagement portion of ~, ~
. . .
pawl portion and the bracing portion are pressed together, the pawl portion pivots releasing the interengagement of the locking portion and the teeth.
In order to increase the ease with whlch the strap can be undone, the bracing portion comprises two lugs, one on each side of the engagement portion of the pawl portion, the engagement portion being movable to a position between the lugs to pivot the pawl portion.
The invention gives the advantage that the strap is easier to undo than existing straps. In particular, the engagement portion and the bracing portion can be squeezed between the thumb and first finger to undo the strap.
An example of the embodiment of the invention is shown in the accompanying drawings, and is described in greater detail below:
In the drawings:
Figure 1 is a side elevational view, partly 1n section, of a strap in accordance with the invention showing the strap forming a retaining loop;
Figure 2 is a longitudinal cross-section view of the strap shown in Figure 1 showing it in a straightened condition; and Figure 3 is a view taken in the direction of the arrow III in Figure 2.
The one-piece plastic strap shown in the drawings comprises an elongated flexible portion 4 having teeth 6 formed along a surface of a central portion thereof. The flexible portion 4 has a free end portion 8 provided with roughened surfaces so that the portion 8 can be readily gripped and pulled for the purpose of tightening the strap.
The flexible portion 4 extends from a fixing portion 10 of the strap which enables the strap to be secured to a headed stud (not shown) projecting from a support. The fixing portion 10 defines a keyhole-shaped slot 12 into which the stud is introduced. To fix the strap, 1 177~2~
the strap is moved so that the stud enters the narrow end of the slot 12 and is retained therein by a stud-locking portion 14 of the fixing portion 10. It should be noted that the fixing portion 10 is optional and need not be ;ncluded if it will not be desired to fix the strap to a stud.
The strap also comprises a locking device 16 joined to the fixing portion 10 by a flexible portion 18. The locking device defines a slot 20 into which the free end portion 8 of the flexible portion 4 can be introduced and locked in the slot 20 so that the strap forms a retaining loop as shown in Figure 1. The strap is wrapped around a workpiece or workpieces to be retained in forming the loop.
The slot 20 of the locking dev;ce 16 is defined by a base portion 22 of the locking device 16, two parallel leg portions 24 extending from the base portion 22, and a pawl portion 26 integral with and supported by the leg portions 24 for pivoting movement therebetween.
The pivoting movement is accommodated by flexing of the interconnections 28 between the pawl portion 26 and the leg portions 24.
The pawl portion 26 comprises a locking portion 30 in the form of a tooth which is arranged to interengage with the teeth 6 of the flexible portion 4 within the slot 20 thereby locking the flexible portion 4 against movement relative to the slot 20. The teeth 6 and 30 are so arranged that, if the flexible portion 4 is moved so as to tighten the loop formed by the strap, the pawl portion 26 pivots releasing the interengagement of the teeth 6 and 30 and allowing the movement but, if the movement is in the strap undoing direction, the teeth 6 and 30 lock together preventing the movement. The pawl portion 26 also comprises an engagement portion 32 engageable to cause the pawl portion 26 to pivot between the leg portions 24 so that the interengagement of the teeth 6 and 30 is released.
The locking device 16 also comprises a bracing portion provided ;
l 177~5 by two lugs 34 which form contlnuations of the leg portions 24 one on each side of the engageMent portion 32 of the pawl portion 26. The bracing portion is in opposed relationship to the engagement portion 32 and is rigidly connected to the leg portions 24. This arrangement provides that, when the engagement portion 32 and the bracing portion are pressed together (for example between the finger and the thumb), the pawl portion 26 pivots releasing the interengagement of the teeth 6 and 30. The engagement portion 32 moves to a position between the lugs 34 to pivot the pawl portion 26. Because pressure is applied to a rigid portion of the locking device 16 as well as to the pawl portion 26, there is no possibility that the pressure applied to the pawl portion 26 will move the entire locking device 16 ratKer than causing the pawl portion to pivot.
;
Claims (2)
1. A one-piece plastic strap comprising an elongated flexible portion having teeth formed along a surface of at least a portion thereof, and a locking device defining a slot into which a free end of the flexible portion can be introduced and locked in the slot so that the strap forms a retaining loop, the slot of the locking device being defined by a base portion of the locking device, two parallel leg portions extending from the base portion, and a pawl portion integral with and supported by the leg portions for pivoting movement there-between, the pawl portion comprising a locking portion arranged to interengage one or more of the teeth of the flexible portion within the slot thereby locking the flexible portion against movement relative to the slot, and an engagement portion engageable to cause the pawl portion to pivot between the leg portions so that the interengagement of the locking portion and the teeth is released, characterized in that the locking device also comprises a bracing portion in opposed relation-ship to the engagement portion of the pawl portion, the bracing portion being rigidly connected to the leg portions thereby providing that, when the engagement portion of the pawl portion and the bracing portion are pressed together, the pawl portion pivots releasing the inter-engagement of the locking portion and the teeth.
2. A strap according to claim 1, characterized in that the bracing portion comprises two lugs, one on each side of the engagement portion of the pawl portion, the engagement portion being movable to a position between the lugs to pivot the pawl portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000413561A CA1177625A (en) | 1982-10-15 | 1982-10-15 | One piece plastic strap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000413561A CA1177625A (en) | 1982-10-15 | 1982-10-15 | One piece plastic strap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1177625A true CA1177625A (en) | 1984-11-13 |
Family
ID=4123777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000413561A Expired CA1177625A (en) | 1982-10-15 | 1982-10-15 | One piece plastic strap |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1177625A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958414A (en) * | 1989-12-05 | 1990-09-25 | Benoit Edward J | Reusable tie-all or bundle fastener |
-
1982
- 1982-10-15 CA CA000413561A patent/CA1177625A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958414A (en) * | 1989-12-05 | 1990-09-25 | Benoit Edward J | Reusable tie-all or bundle fastener |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |