CA1082680A - Snap roller - Google Patents
Snap rollerInfo
- Publication number
- CA1082680A CA1082680A CA307,707A CA307707A CA1082680A CA 1082680 A CA1082680 A CA 1082680A CA 307707 A CA307707 A CA 307707A CA 1082680 A CA1082680 A CA 1082680A
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- Canada
- Prior art keywords
- rod
- wire
- hook
- portions
- pulley
- Prior art date
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Abstract
ABSTRACT OF THE DISCLOSURE
A snap roller utilized as a snatch lock employs a pulley and a rod fabricated from a wire-like spring material to which the pulley is journalled. The rod has n portion of its length, located substantially in the central regions thereof to which the pulley is journalled. A pair of portions of the length of the wire-like rod extends radially outwardly from the longitud-inal axis of the pulley in a direction substantially parallel to one another. The ends of the wire-like rod are formed into oppositely directed hooks such that each of the distal ends approach, and if desired contact the opposed length of the pair of portions of the wire-like rod. In use, a rope or line may be passed between the hook-like ends so as to engage a groove in the pulley due to the fact that each hook-like end resides in planes that are skew to one another allowing the distal ends of the hooks to be forced outwardly from the opposed one of the pair of portions of the wire-like rod. In similar fashion an eye-hook or other bight-like element, such as an eye-hook or spring bight may be engaged within the opening defined by the hooks and the pair of portions of the length of the wire-like rod and the pulley, by passing the bight in between the hook-like ends until the portions of the bight pass the distal ends of the hook. A twisting motion to the bight or the wire-like rod enables the bight to reside capturing the hooks. The line or the bight way be disengaged by reversing the pro-cedure utilized to capture these elements to the snatch block.
An alternate embodiment utilizes a hook-like excursion on the hook-like ends of the wire-like rod which engage portions of the lengths of the wire-like rod in a locking like arrangement, which enhance the ability of the rod to carry great forces applied to the line or the eye hook carried thereby.
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A snap roller utilized as a snatch lock employs a pulley and a rod fabricated from a wire-like spring material to which the pulley is journalled. The rod has n portion of its length, located substantially in the central regions thereof to which the pulley is journalled. A pair of portions of the length of the wire-like rod extends radially outwardly from the longitud-inal axis of the pulley in a direction substantially parallel to one another. The ends of the wire-like rod are formed into oppositely directed hooks such that each of the distal ends approach, and if desired contact the opposed length of the pair of portions of the wire-like rod. In use, a rope or line may be passed between the hook-like ends so as to engage a groove in the pulley due to the fact that each hook-like end resides in planes that are skew to one another allowing the distal ends of the hooks to be forced outwardly from the opposed one of the pair of portions of the wire-like rod. In similar fashion an eye-hook or other bight-like element, such as an eye-hook or spring bight may be engaged within the opening defined by the hooks and the pair of portions of the length of the wire-like rod and the pulley, by passing the bight in between the hook-like ends until the portions of the bight pass the distal ends of the hook. A twisting motion to the bight or the wire-like rod enables the bight to reside capturing the hooks. The line or the bight way be disengaged by reversing the pro-cedure utilized to capture these elements to the snatch block.
An alternate embodiment utilizes a hook-like excursion on the hook-like ends of the wire-like rod which engage portions of the lengths of the wire-like rod in a locking like arrangement, which enhance the ability of the rod to carry great forces applied to the line or the eye hook carried thereby.
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Description
~ ~ 8'~ ~ ~ 0 This invention relates to snatch blocks and more particularly to that class fabricated from only two elements adapted to engage endless lines and bight like fasteners.
The prior art abounds with hanks or snatch blocks.
United States Patent No. 90,113 issued May 18, 1869 to W. McKay et al teaches a pulley having one end thereof journalled to a scissor-like clamp and the other end thereof journable to another member of the scissor-like clamp when the scissor-like clamp is closed by pivoting about a pivot hinge located between the free ends of a pair of clamp elements. The other ends of a pair of clamp elements, when the scissor-like apparatus is closed, forms an opening useful to secure a bite-like element.
This apparatus can engage an endless line which is adapted to wrap around the pulley and the bite when the scissor-like elements are opened. The disadvantage of this apparatus resides in the having to lock together the scissor-like elements by tightening a bolt passing through a pulley to which the pulley is journalled.
United States Patent No. 218,691 issued on August 19, 1879 to C. Spencer teaches a snatch lock comprising a pair of 268~
plates each of which carries a pulley axle such that the plates are rotatable relative to one another. One end of each of the plates carry a semi~circular portion which forms a complete loop upon the plates being rotated relative to one another into a lock position. ~he other ends of the plates carry similar semi-circular portions which form an additional loop. An endless line may be carried by the groove in the pulley as well as a bight captured within the loop formed by the semi-circular portions of the device when closed into loop form. Means are provided for locking together the pair of plates into a position when the semi-circular plates define the hoop. The teachings o Spencer require three physical elements besides the axle to which the pulley is journalled and require a locking device to maintain the apparatus in a closed condition.
Both McKay et al and Spencer suffer the common deficiency of requiring costly components which must be accurately machined or fabricated, which easily wear out due to the requirement of having multiple mating surfaces that are required to be aligned in tight fits such that captured kight-like elements and endless lines do not easily become displaced from their captured positions.
A primary object of the present invention is to provide a snatch-block apparatus which may easily and quickly be .
utilized to engage an endless line or portions of an elongated line without requiring throwing of the line in engagement with the pulley portions thereof.
Heretofore, snatch-block devices were expensive to fabricate and difficult to maintain because the accuracy re~uired to construct such devices were necessarily high, and in use, such devices were unable to take abuse due to the fact that closed loops were formed in the construction thereof, when the apparatus was closed so as to successfully capture a bight-like engaging element and portions of a line within the pulley groove utilized. The prior art has utilized pulley axles cantilevered outwardly from a frame, such that the frame had at one end thereof, a hook-like end. This class of apparatus mounted the axle rod in cantilevered fashion so that when the line engaging the pulley exerted substantial forces on the frame, bending forces were created in the axle rod at the location where the axle rod jointed the frame. This was also true for the cantilevered single hook-like end. The present invention faces these disadvantages by utilizing a pair of hook-like ends secured to the ends of an axle passing through the pulley. Utilizing this construction, the present invention eliminates the canti-levered related problem and the tendency for a single hook-like end to open and thus disengage a bight~like end of a mating element.
The prior art abounds with hanks or snatch blocks.
United States Patent No. 90,113 issued May 18, 1869 to W. McKay et al teaches a pulley having one end thereof journalled to a scissor-like clamp and the other end thereof journable to another member of the scissor-like clamp when the scissor-like clamp is closed by pivoting about a pivot hinge located between the free ends of a pair of clamp elements. The other ends of a pair of clamp elements, when the scissor-like apparatus is closed, forms an opening useful to secure a bite-like element.
This apparatus can engage an endless line which is adapted to wrap around the pulley and the bite when the scissor-like elements are opened. The disadvantage of this apparatus resides in the having to lock together the scissor-like elements by tightening a bolt passing through a pulley to which the pulley is journalled.
United States Patent No. 218,691 issued on August 19, 1879 to C. Spencer teaches a snatch lock comprising a pair of 268~
plates each of which carries a pulley axle such that the plates are rotatable relative to one another. One end of each of the plates carry a semi~circular portion which forms a complete loop upon the plates being rotated relative to one another into a lock position. ~he other ends of the plates carry similar semi-circular portions which form an additional loop. An endless line may be carried by the groove in the pulley as well as a bight captured within the loop formed by the semi-circular portions of the device when closed into loop form. Means are provided for locking together the pair of plates into a position when the semi-circular plates define the hoop. The teachings o Spencer require three physical elements besides the axle to which the pulley is journalled and require a locking device to maintain the apparatus in a closed condition.
Both McKay et al and Spencer suffer the common deficiency of requiring costly components which must be accurately machined or fabricated, which easily wear out due to the requirement of having multiple mating surfaces that are required to be aligned in tight fits such that captured kight-like elements and endless lines do not easily become displaced from their captured positions.
A primary object of the present invention is to provide a snatch-block apparatus which may easily and quickly be .
utilized to engage an endless line or portions of an elongated line without requiring throwing of the line in engagement with the pulley portions thereof.
Heretofore, snatch-block devices were expensive to fabricate and difficult to maintain because the accuracy re~uired to construct such devices were necessarily high, and in use, such devices were unable to take abuse due to the fact that closed loops were formed in the construction thereof, when the apparatus was closed so as to successfully capture a bight-like engaging element and portions of a line within the pulley groove utilized. The prior art has utilized pulley axles cantilevered outwardly from a frame, such that the frame had at one end thereof, a hook-like end. This class of apparatus mounted the axle rod in cantilevered fashion so that when the line engaging the pulley exerted substantial forces on the frame, bending forces were created in the axle rod at the location where the axle rod jointed the frame. This was also true for the cantilevered single hook-like end. The present invention faces these disadvantages by utilizing a pair of hook-like ends secured to the ends of an axle passing through the pulley. Utilizing this construction, the present invention eliminates the canti-levered related problem and the tendency for a single hook-like end to open and thus disengage a bight~like end of a mating element.
2~80 According to the present invention, there is provided a snatch-block apparatus comprising:
a pulley having a journal opening extending axially therethrough;
a wire-like rod having:
a central portion passing through the opening in the pulley such that the pulley is journalled thereto;
a pair of limb portions each extending generally radially outwardly from an opposed end of said central portion, said limb portions having substantially mutually longitudinal axis;
a pair of hook portions, each extending from the end o a respective limb portion and being curved in a .
mutually convergent direction so that the distal free end of lS one hook portion is disposed àdjacent to-the limb portion :.
carrying the opposed hook portion, intermediate parts of -said hook portions being separated from one another;
the distal free ends of the hook portions being disposed on opposite sides of the plane of said limb portion;
the end extremity of each of said distal ends being separated from its ad~acent limb portion and defining therewith ! "' ,',' a convergent passageway to permit insertion therebetween of a wire-like rod structure;
said hook portions having spring-like characteristics to permit resilient increase and decrease of separation between an end extremity thereof and its adjacent limb portion in response to insertion therebetween of a wire-like rod structure;
the end extremities of said hook portions being disposed at points located within the length of said limb ~ portions of the wire-like rod.
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~ 8Z6i~0 Embodiments of the invention are illustrated in the accompanying drawings, in which:
Figure 1 is a perspective view of the present invention shown engaging a portion of an endless line and a bight-like end of an external apparatus.
Figure 2 is a plan view of an alternative embodi-ment of a portion of the apparatus shown in Figure 1.
Figure 3 is a plan view of the apparatus shown in Figure 2, when in a locked position.
The structure and method of fabrication of the present invention is applicable to a wire-like rod fabricated from a metallic material, preferably of corrosion resistant steel, protected by plating, to a portion of which a plastic pulley is journalled. The pulley is journalled to a middle portion of the wire-like rod. The wire-like rod has a pair of limb portions, one extending from each end of the central, pull~y-carrying portion, and each having a longitu-dinal axis extending substantially parallel to the other and at right angles to the hole within the pulley. Hook portions are fabricated adjacent the ends of the wire-like rod such that the hooks turn in opposite directions having the distal endmost portions thereof almost coming into contact with the pair of portions of the length of the wire-like rod. The remaining portions of the hook-like ends reside in skew planes such that the planes intersect at a line extending parallel and spaced apart from the longitudinal axis of the pulley. The width of the pulley is designed so that it may reside between the pair of limb portions of the length of . :
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the wire-like rods, such that portions of the pulley reside in a loop formed ~y the pair of hooks and the length of the pair of limb portions of the length of the wire-like element.
Thii loop may ~e utilized to retain portions of an endless line or portions of the length of an extended line, when the line is wrapped partially a~out a groove in the pulley. A
bight-like end of a closed loop in an external device may be used to engage the apparatus of the present invention so that tension forces may ~e exerted on the line and the external apparatus, such that these tension forces are oppositely directed, In an alternate embodiment, the hook portions each have a mutually inwardly extending excursion adjacent the free end of the wire-like rod, such that the excursions may lS engage its adjacent limb portion of the rod. Each of such excursions extends in opposite directions, partially transverse to the opening formed by the hook-like ends. Thus, when a force is applied to the rod, away from the pulley, and on the parallel overlapping portions of the hook portions remote from the pulley, the excursions lock onto the limb portions of ~he wire-like rod, providing a greater strength to the apparatus~ permitting same to carry substantial forces on the pulley and the rod, each in opposite directions.
Now referring to`Figure 1, a first embodiment of the present inYention 10 has pulley 12 journalled to a central portion 14 of ~ire-like rod 16. Portion 14 is shown passing through opening 18 coaxially aligned between exterior planar surfaces 2Q and 22 of pulley 12. An endless line 24 is shown engaged within groove 26 of pulley 12. A pair of limb portiDnS
28 and 30 of wire-like rod 16 are shown fastened to portion 14 ~ -.
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68(31 such that the longitudinal axes thereof extend substantially parallel to one another. Hook-like end portions 32 and 34 are formed adjacent to limb portions 28 and 30 respectively.
Free ends 36 and 38 of hooks 32 and 34 respectively are shown in touching engagement with limb portions 30 and 28 respectively. If desired, ends 36 and 38 may be spaced apart rom limb portions 30 and 28 a distance less than points 40 and 42 in hooks 32 and 34 respectively. Loop 44 is shown engaging hooks 32 and 34. Loop 44 may be fabricated having a closed opening rather than the bight-like opening as shown if desired. Loop 44 may be disengaged with hooks 32 and 34 by first causing loop 44 to be moved in the direction of arrow 46 to a location where point 48 and 50 are-------- ----'..'"~' .
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8Z~80 advanced beyond ends 36 and 38. A twisting motion exerted on loop 44 in the direction of arro~ 52 permits point 54 -to be located adjacent portion 36. In likewise fashion, point 56 is disposed adjacent end 38. A manual force exerted on loop 44 in the direction opposite to arrow 46, causes point 54 to slide between end 36 and portion 30, and in similar fashion, causes point 56 to slide between end 38 and portion 28 such that loop 44 may be totally disengaged from hooks 32 and 34. In similar fashion, loop 44, when disengaged from wire-like rod 16 may be installed within loop-like opening 58 by manually displacing loop 44 in the direction of arrow 46 when the plane defining loop 44 is disposed intermediate the planes defining hooks 32 and 34. When points 54 and 56 extend beyond ends 36 and 38, and closer to pulley 12, a twisting motion opposite to direction of arrow S2 causes loop 44 to be captured within loop-like opening 58. In similar fashion, the bight 60 formed by line 24, may be caused to be inserted into loop-like opening 58 so that line 24 may engage groove 26 of pulley 12, as shown. Alternately, line 24 may be disengaged from loop-like opening 58 by passing portions of the line between end 38 and portion 28 and end 36 and portion 30.
End 38 and 36 define a line depicted by dotted line 62, such that dotted line 62 extends parallel to but spaced apart .
from the longitudinal axis of pulley 12, depicted by dotted Z~8~
line 64. Dotted line 62 also defines the intersection of the planes in which hooks 32 and 34 reside.
Figure 2 illustrates an alternate em~odiment 66, of wire-like rod 16 shown in Figure 1~ It should be understood that ends 68 are connected together, in the same manner as shown in Figure 1, shown passing through pulley 12 thereof.
Ends 70 and 72 are shown adjacent hook-like excursions 74 and 76 respectively. Hook-like excursion 74 and end 70 both are capable of passing over surface 78 of wire-like rod 66.
In opposite fashion,excursion 76 and end 72 are capable of en~aging behind surface 80, of rod 66. The shape of rod 66, shown in Figure 2, is the shape assumed thereby when rod-like element 6~ is not subjected to any external forces.
Figure 3 illustrates the apparatus shown in Figure 2, lS when a force, applied at point 82, of hook-like end 84, and the hook-like end therebehind, is applied in the direction of arrow 86. In such position, excursion 74 and 76 are shown engaging sides 90 of wire-like rod 66 such that end 7~ is superimposed over surface 78 whilst end 72 is positioned behind surface 80 locking the hook-like excursions to sides 90. The springy-like characteristics of rod-like element 66 permit such element to reassume the shape shown in Figure 2 when the applied force, at point 82, is removed. When such force is applied, the shape of rod-like element 66 is closed, forming a closed opening 92.
One of the advantages of the present invention is a snatch-block apparatus which may easily and quickly be utilized to engage an endless line ox portions of an elongated line ~Jithout requiring throwing of the line in engagement with the pulley portions thereof. ~ -Another ad~antage of the present invention is the snatch-block apparatus, which can be simultaneously utilized to engage a closed loop-like bight device without threading onto the bight portions thereof.
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Still another advantage of the present invention is a snatch-block which can be utilized to simultaneously engage and endless or long line witllout threading and a closed loop bight-like device, each independently located within the apparatus such that the line may be engaged onto the pulley and the bight-like device may grasp the snatch-block securely.
Yet another advantage of the present invention is an apparatus utilized as a snatch-block which only requires a pair of components therefor.
A further advantage of the present invention is a snatch-block which is ex~remely economical in cost and easily fabricated.
A still further advantage of the present invention is a ~natch-block wherein the pulley portion is fabricated from a plas~ic material such that the pulley easily journals to the remaining metallic portions of the apparatus.
The present invention also provides a snatch block apparatus which lockingly engages the closed loop-like bight device, without threading, such that the ~ight device`may carry substantial forces without forcing open the portion of the apparatus that engages the loop-like bight.
Thus, there is disclosed in the above description and in tlle drawings, an embodiment of the invention which fully and effectively accomplishes the objects thereof. However, it will become apparent to those skilled in ~e art, how to make variations and modifications to the instant invention. ~herefore, this invention is to be limited, not by the specific disclosure hereïn, but only by the appending claims.
a pulley having a journal opening extending axially therethrough;
a wire-like rod having:
a central portion passing through the opening in the pulley such that the pulley is journalled thereto;
a pair of limb portions each extending generally radially outwardly from an opposed end of said central portion, said limb portions having substantially mutually longitudinal axis;
a pair of hook portions, each extending from the end o a respective limb portion and being curved in a .
mutually convergent direction so that the distal free end of lS one hook portion is disposed àdjacent to-the limb portion :.
carrying the opposed hook portion, intermediate parts of -said hook portions being separated from one another;
the distal free ends of the hook portions being disposed on opposite sides of the plane of said limb portion;
the end extremity of each of said distal ends being separated from its ad~acent limb portion and defining therewith ! "' ,',' a convergent passageway to permit insertion therebetween of a wire-like rod structure;
said hook portions having spring-like characteristics to permit resilient increase and decrease of separation between an end extremity thereof and its adjacent limb portion in response to insertion therebetween of a wire-like rod structure;
the end extremities of said hook portions being disposed at points located within the length of said limb ~ portions of the wire-like rod.
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~ 8Z6i~0 Embodiments of the invention are illustrated in the accompanying drawings, in which:
Figure 1 is a perspective view of the present invention shown engaging a portion of an endless line and a bight-like end of an external apparatus.
Figure 2 is a plan view of an alternative embodi-ment of a portion of the apparatus shown in Figure 1.
Figure 3 is a plan view of the apparatus shown in Figure 2, when in a locked position.
The structure and method of fabrication of the present invention is applicable to a wire-like rod fabricated from a metallic material, preferably of corrosion resistant steel, protected by plating, to a portion of which a plastic pulley is journalled. The pulley is journalled to a middle portion of the wire-like rod. The wire-like rod has a pair of limb portions, one extending from each end of the central, pull~y-carrying portion, and each having a longitu-dinal axis extending substantially parallel to the other and at right angles to the hole within the pulley. Hook portions are fabricated adjacent the ends of the wire-like rod such that the hooks turn in opposite directions having the distal endmost portions thereof almost coming into contact with the pair of portions of the length of the wire-like rod. The remaining portions of the hook-like ends reside in skew planes such that the planes intersect at a line extending parallel and spaced apart from the longitudinal axis of the pulley. The width of the pulley is designed so that it may reside between the pair of limb portions of the length of . :
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the wire-like rods, such that portions of the pulley reside in a loop formed ~y the pair of hooks and the length of the pair of limb portions of the length of the wire-like element.
Thii loop may ~e utilized to retain portions of an endless line or portions of the length of an extended line, when the line is wrapped partially a~out a groove in the pulley. A
bight-like end of a closed loop in an external device may be used to engage the apparatus of the present invention so that tension forces may ~e exerted on the line and the external apparatus, such that these tension forces are oppositely directed, In an alternate embodiment, the hook portions each have a mutually inwardly extending excursion adjacent the free end of the wire-like rod, such that the excursions may lS engage its adjacent limb portion of the rod. Each of such excursions extends in opposite directions, partially transverse to the opening formed by the hook-like ends. Thus, when a force is applied to the rod, away from the pulley, and on the parallel overlapping portions of the hook portions remote from the pulley, the excursions lock onto the limb portions of ~he wire-like rod, providing a greater strength to the apparatus~ permitting same to carry substantial forces on the pulley and the rod, each in opposite directions.
Now referring to`Figure 1, a first embodiment of the present inYention 10 has pulley 12 journalled to a central portion 14 of ~ire-like rod 16. Portion 14 is shown passing through opening 18 coaxially aligned between exterior planar surfaces 2Q and 22 of pulley 12. An endless line 24 is shown engaged within groove 26 of pulley 12. A pair of limb portiDnS
28 and 30 of wire-like rod 16 are shown fastened to portion 14 ~ -.
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68(31 such that the longitudinal axes thereof extend substantially parallel to one another. Hook-like end portions 32 and 34 are formed adjacent to limb portions 28 and 30 respectively.
Free ends 36 and 38 of hooks 32 and 34 respectively are shown in touching engagement with limb portions 30 and 28 respectively. If desired, ends 36 and 38 may be spaced apart rom limb portions 30 and 28 a distance less than points 40 and 42 in hooks 32 and 34 respectively. Loop 44 is shown engaging hooks 32 and 34. Loop 44 may be fabricated having a closed opening rather than the bight-like opening as shown if desired. Loop 44 may be disengaged with hooks 32 and 34 by first causing loop 44 to be moved in the direction of arrow 46 to a location where point 48 and 50 are-------- ----'..'"~' .
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8Z~80 advanced beyond ends 36 and 38. A twisting motion exerted on loop 44 in the direction of arro~ 52 permits point 54 -to be located adjacent portion 36. In likewise fashion, point 56 is disposed adjacent end 38. A manual force exerted on loop 44 in the direction opposite to arrow 46, causes point 54 to slide between end 36 and portion 30, and in similar fashion, causes point 56 to slide between end 38 and portion 28 such that loop 44 may be totally disengaged from hooks 32 and 34. In similar fashion, loop 44, when disengaged from wire-like rod 16 may be installed within loop-like opening 58 by manually displacing loop 44 in the direction of arrow 46 when the plane defining loop 44 is disposed intermediate the planes defining hooks 32 and 34. When points 54 and 56 extend beyond ends 36 and 38, and closer to pulley 12, a twisting motion opposite to direction of arrow S2 causes loop 44 to be captured within loop-like opening 58. In similar fashion, the bight 60 formed by line 24, may be caused to be inserted into loop-like opening 58 so that line 24 may engage groove 26 of pulley 12, as shown. Alternately, line 24 may be disengaged from loop-like opening 58 by passing portions of the line between end 38 and portion 28 and end 36 and portion 30.
End 38 and 36 define a line depicted by dotted line 62, such that dotted line 62 extends parallel to but spaced apart .
from the longitudinal axis of pulley 12, depicted by dotted Z~8~
line 64. Dotted line 62 also defines the intersection of the planes in which hooks 32 and 34 reside.
Figure 2 illustrates an alternate em~odiment 66, of wire-like rod 16 shown in Figure 1~ It should be understood that ends 68 are connected together, in the same manner as shown in Figure 1, shown passing through pulley 12 thereof.
Ends 70 and 72 are shown adjacent hook-like excursions 74 and 76 respectively. Hook-like excursion 74 and end 70 both are capable of passing over surface 78 of wire-like rod 66.
In opposite fashion,excursion 76 and end 72 are capable of en~aging behind surface 80, of rod 66. The shape of rod 66, shown in Figure 2, is the shape assumed thereby when rod-like element 6~ is not subjected to any external forces.
Figure 3 illustrates the apparatus shown in Figure 2, lS when a force, applied at point 82, of hook-like end 84, and the hook-like end therebehind, is applied in the direction of arrow 86. In such position, excursion 74 and 76 are shown engaging sides 90 of wire-like rod 66 such that end 7~ is superimposed over surface 78 whilst end 72 is positioned behind surface 80 locking the hook-like excursions to sides 90. The springy-like characteristics of rod-like element 66 permit such element to reassume the shape shown in Figure 2 when the applied force, at point 82, is removed. When such force is applied, the shape of rod-like element 66 is closed, forming a closed opening 92.
One of the advantages of the present invention is a snatch-block apparatus which may easily and quickly be utilized to engage an endless line ox portions of an elongated line ~Jithout requiring throwing of the line in engagement with the pulley portions thereof. ~ -Another ad~antage of the present invention is the snatch-block apparatus, which can be simultaneously utilized to engage a closed loop-like bight device without threading onto the bight portions thereof.
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Still another advantage of the present invention is a snatch-block which can be utilized to simultaneously engage and endless or long line witllout threading and a closed loop bight-like device, each independently located within the apparatus such that the line may be engaged onto the pulley and the bight-like device may grasp the snatch-block securely.
Yet another advantage of the present invention is an apparatus utilized as a snatch-block which only requires a pair of components therefor.
A further advantage of the present invention is a snatch-block which is ex~remely economical in cost and easily fabricated.
A still further advantage of the present invention is a ~natch-block wherein the pulley portion is fabricated from a plas~ic material such that the pulley easily journals to the remaining metallic portions of the apparatus.
The present invention also provides a snatch block apparatus which lockingly engages the closed loop-like bight device, without threading, such that the ~ight device`may carry substantial forces without forcing open the portion of the apparatus that engages the loop-like bight.
Thus, there is disclosed in the above description and in tlle drawings, an embodiment of the invention which fully and effectively accomplishes the objects thereof. However, it will become apparent to those skilled in ~e art, how to make variations and modifications to the instant invention. ~herefore, this invention is to be limited, not by the specific disclosure hereïn, but only by the appending claims.
Claims (7)
PRIVILEGE OR PROPERTY IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A snatch-block apparatus comprising:
a pulley having a journal opening extending axially therethrough;
a wire-like rod having:
a central portion passing through the opening in the pulley such that the pulley is journalled thereto;
a pair of limb portions each extending generally radially outwardly from an opposed end of said central portion, said limb portions having substantially mutually longitudinal axis;
a pair of hook portions, each extending from the end of a respective limb portion and being curved in a mutually convergent direction so that the distal free end of one hook portion is disposed adjacent to the limb portion carrying the opposed hook portion, intermediate parts of said hook portions being separated from one another;
the distal free ends of the hook portions being disposed on opposite sides of the plane of said limb portion;
the end extremity of each of said distal ends being separated from its adjacent limb portion and defining therewith a convergent passageway to permit insertion therebetween of a wire-like rod structure;
said hook portions having spring-like characteristics to permit resilient increase and decrease of separation between an end extremity thereof and its adjacent limb portion in response to insertion therebetween of a wire-like rod structure;
the end extremities of said hook portions being disposed at points located within the length of said limb portions of the wire-like rod.
a pulley having a journal opening extending axially therethrough;
a wire-like rod having:
a central portion passing through the opening in the pulley such that the pulley is journalled thereto;
a pair of limb portions each extending generally radially outwardly from an opposed end of said central portion, said limb portions having substantially mutually longitudinal axis;
a pair of hook portions, each extending from the end of a respective limb portion and being curved in a mutually convergent direction so that the distal free end of one hook portion is disposed adjacent to the limb portion carrying the opposed hook portion, intermediate parts of said hook portions being separated from one another;
the distal free ends of the hook portions being disposed on opposite sides of the plane of said limb portion;
the end extremity of each of said distal ends being separated from its adjacent limb portion and defining therewith a convergent passageway to permit insertion therebetween of a wire-like rod structure;
said hook portions having spring-like characteristics to permit resilient increase and decrease of separation between an end extremity thereof and its adjacent limb portion in response to insertion therebetween of a wire-like rod structure;
the end extremities of said hook portions being disposed at points located within the length of said limb portions of the wire-like rod.
2. The apparatus of claim 1 wherein the end extremities of the hook portion terminate on a line substantially parallel to the axis of rotation of the pulley.
3. The apparatus of claim 2 wherein the end extremities of the hook portions extend in mutually diversion to directions.
4. The apparatus of claim 3 wherein said wire-like rod is fabricated from a material possessing spring-like characteristics.
5. The apparatus of claim 4 wherein said material is plated steel.
6. The apparatus of claim 1 wherein each hook portion has an integral mutually inwardly extending excursion adjacent the respective distal free end thereof, said excursions being located inwardly of their respective adjacent limb portions when the wire-like rod is in an unstressed condition, said excursions being adapted to engage the respective adjacent limb portion upon application of opposed forces to the central portion and to the hook portions of said wire-like rod.
7. Apparatus of claim 1, claim 4 or claim 6 wherein the hook portions are laterally offset from one another in the region furthest from said central portion of the wire-like rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84075177A | 1977-10-11 | 1977-10-11 | |
| US840,751 | 1977-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1082680A true CA1082680A (en) | 1980-07-29 |
Family
ID=25283122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA307,707A Expired CA1082680A (en) | 1977-10-11 | 1978-07-19 | Snap roller |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU498448B2 (en) |
| CA (1) | CA1082680A (en) |
-
1978
- 1978-03-07 AU AU33917/78A patent/AU498448B2/en not_active Expired
- 1978-07-19 CA CA307,707A patent/CA1082680A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU498448B2 (en) | 1979-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |