US3911762A - Lanyard handle, method of and apparatus for forming same - Google Patents

Lanyard handle, method of and apparatus for forming same Download PDF

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US3911762A
US3911762A US412637A US41263773A US3911762A US 3911762 A US3911762 A US 3911762A US 412637 A US412637 A US 412637A US 41263773 A US41263773 A US 41263773A US 3911762 A US3911762 A US 3911762A
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cord
handle
plastic material
lanyard
zones
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US412637A
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Glenn H Mackal
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Halkey Roberts Corp
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Individual
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Priority claimed from US00344749A external-priority patent/US3809288A/en
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Assigned to HALKEY-ROBERTS CORPORATION reassignment HALKEY-ROBERTS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MACKAL, GLENN H., 4923 59TH AVE. S., ST. PETERSBURG, FL.
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Assigned to NATIONSBANK, N.A. (CAROLINAS) AG AGENT reassignment NATIONSBANK, N.A. (CAROLINAS) AG AGENT SECURITY AGREEMENT Assignors: BEAR ARCHERY INC., BROWN MOULDING COMPANY, INC., HRC HOLDINGS INC., MW MANUFACTURERS INC., TETERS FLORAL PRODUCTS INC., VALLEY RECREATION PRODUCTS INC.
Assigned to NATIONSBANK, N.A. AS AGENT reassignment NATIONSBANK, N.A. AS AGENT RELEASE OF SECURITY INTEREST Assignors: BEAR ARCHERY, INC., HAKLEY-ROBERTS CORPORATION
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14549Coating rod-like, wire-like or belt-like articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14311Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63CLAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C9/00Life-saving in water
    • B63C9/24Arrangements of inflating valves or of controls thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/02Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cables; Fastening means which engage a sleeve or the like fixed on the cable
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05GCONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/02Controlling members for hand actuation by linear movement, e.g. push buttons
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49888Subsequently coating
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20576Elements
    • Y10T74/20732Handles

Definitions

  • ABSTRACT An improved handle for a lanyard for operating the Relaled Application Data capsule containing compressed gas mounted on a manifold for use with an inflatable article such as a life life raft, and the like, a method of and an apparatus for forming such lanyard handle and securing it to the lanyard cord.
  • the handle is made of plastic material which is molded in place upon the lanyard cord in such manner as to key or mechanically connect the handle to the cord vvithout the use of any added fastening means.
  • This invention relates to an improved handle for a lanyard for operating the capsule containing compressed gas mounted on a manifold for use with an inflatable article such as a life vest, life raft, and the like.
  • a manifold for use with an inflatable article such as a life vest, life raft, and the like.
  • the invention is illustrated herein in connection with its use with a C inflation manifold assembly for use with an inflatable article such as a life vest, life raft, and the like.
  • FIG. 1 is a view in elevation of a manifold according to the present invention, an inflatable body on which the manifold is mounted being shown fragmentarily;
  • FIG. 2 is a fragmentary view in longitudinal section through the central part of the lanyard handle, the lanyard cord being shown in elevation, the section being taken along the line 22 of FIG. 1;
  • FIG. 3 is a view in elevation of one-half of a plastic material injection mold for forming a lanyard handle in accordance with the invention and for securing it to the lanyard cord.
  • FIG. 1 there is shown a manifold and check valve assembly sealingly mounted upon a panel of an inflatable article.
  • the sleeve-like main body 11 of the check valve passes through and is sealed to a mounting flange 12 made of elastomeric material which is heatsealable to the panel 10 of the inflatable article.
  • the sleeve-like body of the valve and its manner of connection and sealing to the mounting flange may be the same as those shown and described in application Ser. No. 218,669, filed Jan. 18, 1972 now US. Pat. No. 3,754,731, of which the present inventor is a coinventor.
  • the illustrative inflation manifold has a passage extending therethrough transverse to the broad extent of the manifold, the passage having a flat side on the bottom thereof as it is shown in FIG. 1.
  • the sleeve-like body 11 of the valve which has an external configuration complementary to the cross-section of the passage, extends through such passage and is sealingly held therein by a cap nut screwed onto the threaded outer end of the body 11, there being suitable washers interposed, on the one hand, between a flange adjacent the inner end of the body 11 and the body of the manifold, and, on the other hand, between the cap nut and the body of the manifold on the other side thereof.
  • manifold has a body generally in the form of a thick disc having parallel front and rear sides, parallel longitudinally spaced ends 29, 30, and upper and lower surfaces 25, 26, respectively, of oppositely convex, part-circular cylindrical shape.
  • body of the manifold is provided with means for threadedly receiving the threaded neck of a C0 cartridge and sealing it to the gas-conducting chamber inwardly of the body of the manifold.
  • the capsule has a sealing disc of soft metal spanning its neck, such soft metal seal being adapted to be pierced when required, whereby to release the gas from the capsule so that it flows into the chamber in the manifold body through a passage therein and thence through an exit passage into the longitudinal bore in the valve body 11 through a radial passage therein.
  • the soft metal seal of the capsule 32 is pierced, when it is desired to inflate the inflatable article, by means including a cam lever in the form of a bell crank lever 40 having an elongated lever arm which lies generally horizontal (FIG. 1) when the lever is in retracted, inoperative position, and a generally vertical, shorter arm having a cam 39 on its lower end.
  • the lever 40 is pivotally mounted upon a transverse pivot pin 42 which extends from one side of the manifold body to the other and spans a narrow, longitudinally extending leverreceiving slot which extends longitudinally of the body of the manifold at the top thereof and downwardly along the right-hand end of the manifold body.
  • a needle plunger Reciprocably and sealingly mounted in a circular cylindrical bore in body 22 forming a prolongation of the chamber therein is a needle plunger, the enlarged outer end or head of which is in the form of a cam follower.
  • the plunger is constantly urged to the right into engagement with the cam 39 by a coil compression spring which acts between the head of the plunger and an annular shoulder at the left-hand end of the chamber in body 22.
  • Coaxial of the plunger and forming a part thereof is a capsule seal-piercing needle, the sharpened left-hand end of which is spaced from the seal at the end of the neck of the capsule 32 when the lever 40 is in its retracted, inoperative position, as shown in FIG. 1.
  • the lever 40 When it is desired to release the gas from the capsule 32 in order to inflate the inflatable article, the lever 40 is swung clockwise about its mounting pivot shaft 42 until the high point of the cam 39 has passed through the position in which it engages the high point of the cam follower on the end of the head of the plunger 41.
  • This causes the piercing needle first to be thrust to the left against the opposition of the spring 48 sufficiently to pierce the seal in the neck of the capsule 32, the spring thereafter thrusting the plunger to the right as the high point of its cam follower end travels downwardly on the cam 39 on lever 40, thereby to open the hole made in the soft metal seal in the neck of the capsule 32 by the needle.
  • Such swinging of the lever 40 is accomplished by pulling a handle 45 on a lanyard cord generally designated 44, which is secured to the outer end of the longer arm of the lever 40, by a sleeve-like means 46 in the direction to the right in FIG. 1.
  • the handle 45 is symmetrical about its longitudinal axis, having similar wings projecting in opposite directions from an axially extending circular cylindrical portion 84.
  • a wire seal (not shown) of small gauge which extends through a hole in lever 40 and passages in body 22 extending inwardly from oppositely disposed aligned recesses 51 therein.
  • Such seal prevents the unwanted movement of the lever 40 in a seal-piercing direction, but may readily be broken by a deliberate, fairly strong pull exerted upon the handle 45 of the lanyard.
  • the body 22 of the manifold is also provided at its upper left-hand corner (FIG.
  • the bight of a loop 64 in the lanyard cord 44 extends through a hole in the ,outer end of the longer arm of lever 40, the two parallel portions 65 of the cord passing through the fastener 46, which is in the form of a flattened sleeve.
  • Such sleeve is simultaneously crimped transversely at a longitudinally central position and two longitudinally spaced outer zones, the sleeve also being simultaneously deformed into a broad V-shaped portion.
  • This may be done, for example, by engaging the sleeve by two longitudinally spaced, transverse dies which engage the sleeve near its outer ends on its lefthand surface to form indentations in outer zones of the sleeve, while a movable transverse die engages the central portion of the sleeve at its right-hand side to form indentation, simultaneously thrusting such central portion of the sleeve as a whole to the left.
  • FIGS. 2 and 3 there is shown a portion of an injection mold which not only forms the lanyard handle 45 but simultaneously connects it to the lanyard cord 44.
  • a mold half 74 in which there is formed a cavity 75 which, together with a confronting identical cavity 75' in a similar confronting mold half 74 (FIG. 2), defines the handleforming cavity of the mold.
  • a lanyard cord-receiving channel 78 Centrally of the cavity 75 in the mold part 74 there is formed a lanyard cord-receiving channel 78 which has a transverse shape of one-half circular cylinder, channel 78 cooperating with a similar, confronting half-circular cylindrical channel in the other mold half.
  • a supply of lanyard cord is provided at the left-hand side of the mold half 74, the lanyard cord 44 entering the mold through a guide means 76, which cooperates with a similar guide half in the other mold part.
  • a plurality of longitudinaly spaced parallel cord-flattening pins 80 are affixed to the mold half 74 centrally of the mold cavity 75 therein.
  • the pins 80 cooperate with similar, aligned confronting pins 80 in the other mold half 74 as shown in FIG. 2.
  • the pins 80, 80' are spaced longitudinally of the central portion of the cavity which is of circular cylindrical shape, there being two opposite wings 85 extending from a' generally circular cylindrical portion 84, and a bordering thickened rim on the resulting lanyard handle 45, as shown in FIG. 1.
  • the lanyard cord 44' in this instance is made of braided nylon filament, which is somewhat slippery and is ordinarily difficult to secure in a mold handle without the provision of bulky, unwanted fastening means.
  • the use of the mold of FIGS. 2 and 3, however, produces a connection between the cord 44 and the handle 45 which exceeds the requirements imposed by commercial specifications for such article.
  • the opposed pins 80, 80 strongly compress the lanyard cord 44 between their confronting inner ends when the mold is closed, as shown in FIG. 2.
  • the plastic material which is to form the handle 45 is injected under high pressure into the cavity 75, the portions 89 of the cord 44 which lie between the sets of opposed pins 80, is relatively undistorted and thus substantially retain their initial diameter.
  • the body 22 of the manifold 14 may be made of any strong, durable, and impact-resistant material; as noted, it is preferably made as an integral molding of plastic material.
  • plastic materials useful for this purpose are acetal resins, sold under the trade name DELRIN by Dupont, and polycarbonate resins, such as those sold under the trademark LEXAN by General Electric Company.
  • the lanyard handle 45 may be made of any suitable strong, tough plastic material such as nylon.
  • the combination comprising a pull cord and a pull handle connected thereto, the handle being made of plastic material and being molded about the cord along the length of coterminous portions of the handle and cord, spaced zones of the cord within the handle having two opposite surfaces of the cord flattened, the handle having holes therein overlying said two opposite sur faces of the cord at said spaced zones, the plastic material at the boundaries of said zones having lip portions extending radially inwardly toward the axis of the cord .end mechanically keying the handle to the cord.
  • cord is formed of multi-filamentary material.

Abstract

An improved handle for a lanyard for operating the capsule containing compressed gas mounted on a manifold for use with an inflatable article such as a life vest, life raft, and the like, a method of and an apparatus for forming such lanyard handle and securing it to the lanyard cord. The handle is made of plastic material which is molded in place upon the lanyard cord in such manner as to key or mechanically connect the handle to the cord without the use of any added fastening means.

Description

Oct. 14, 1975 LANYARD HANDLE, METHOD OF AND APPARATUS FOR FORMING SAME Primary ExaminerBenjamin W. Wyche Assistant ExaminerFrank H. McKenzie, Jr. Attorney, Agent, or Firm-Alfred W. Vibber [76] Inventor: Glenn H. Mackal, 83 Chestnut Ridge Road, Saddle River, NJ. 07458 [22] Filed: Nov. 5, 1973 [21] Appl. No.: 412,637
ABSTRACT An improved handle for a lanyard for operating the Relaled Application Data capsule containing compressed gas mounted on a manifold for use with an inflatable article such as a life life raft, and the like, a method of and an apparatus for forming such lanyard handle and securing it to the lanyard cord. The handle is made of plastic material which is molded in place upon the lanyard cord in such manner as to key or mechanically connect the handle to the cord vvithout the use of any added fastening means.
Ma 15% 3 1 7 7G22 9 .50; 1 mm n f m m N06 M WR R a w m 0 ""56 M NW4 3 a mmm N mm" "aw 68 "m W mum m Q n 0 .m a 0 .5 .wo DN ui n l. 1]] 2 2 8 6 555 [[rlL 5 Claims, 3 Drawing Figures [56] References Cited UNITED STATES PATENTS 3,l35,l3l 6/1964 64/2 R US. Patent Oct. 14,1975 Sheet 1 of2 3,911,762
Illlllllllllllll US. Patent Oct. 14, 1975 Sheet2of2 3,911,762
LANYARD HANDLE, METHOD OF AND APPARATUS FOR FORMING SAME This application is a division of application Ser. No. 344,749, now US. Pat. No. 3,809,288 filed Mar. 26, 1973.
This invention relates to an improved handle for a lanyard for operating the capsule containing compressed gas mounted on a manifold for use with an inflatable article such as a life vest, life raft, and the like. Although in its broader aspects the invention is not limited thereto, the invention is illustrated herein in connection with its use with a C inflation manifold assembly for use with an inflatable article such as a life vest, life raft, and the like.
It is among the objects of the present invention to provide an improved handle upon a lanyard cord, an improved method of mounting a handle upon the lanyard cord, and a novel and improved apparatus for forming the lanyard handle and securing it to the lanyard cord.
The above and further objects and novel features of the invention will more fully appear from the following description when the same is read in conjunction with the accompanying drawings. It is to be expressly understood, however, that the drawings are for the purpose of illustration only, and are not intended as a definition of the limits of the invention.
In the drawings, wherein like reference characters refer to like parts throughout the several views:
FIG. 1 is a view in elevation of a manifold according to the present invention, an inflatable body on which the manifold is mounted being shown fragmentarily;
FIG. 2 is a fragmentary view in longitudinal section through the central part of the lanyard handle, the lanyard cord being shown in elevation, the section being taken along the line 22 of FIG. 1; and
FIG. 3 is a view in elevation of one-half of a plastic material injection mold for forming a lanyard handle in accordance with the invention and for securing it to the lanyard cord.
In FIG. 1 there is shown a manifold and check valve assembly sealingly mounted upon a panel of an inflatable article. The sleeve-like main body 11 of the check valve passes through and is sealed to a mounting flange 12 made of elastomeric material which is heatsealable to the panel 10 of the inflatable article. The sleeve-like body of the valve and its manner of connection and sealing to the mounting flange may be the same as those shown and described in application Ser. No. 218,669, filed Jan. 18, 1972 now US. Pat. No. 3,754,731, of which the present inventor is a coinventor.
The illustrative inflation manifold has a passage extending therethrough transverse to the broad extent of the manifold, the passage having a flat side on the bottom thereof as it is shown in FIG. 1. The sleeve-like body 11 of the valve, which has an external configuration complementary to the cross-section of the passage, extends through such passage and is sealingly held therein by a cap nut screwed onto the threaded outer end of the body 11, there being suitable washers interposed, on the one hand, between a flange adjacent the inner end of the body 11 and the body of the manifold, and, on the other hand, between the cap nut and the body of the manifold on the other side thereof.
The embodiment of manifold shown in the drawings has a body generally in the form of a thick disc having parallel front and rear sides, parallel longitudinally spaced ends 29, 30, and upper and lower surfaces 25, 26, respectively, of oppositely convex, part-circular cylindrical shape. At its left-hand end as it is shown in FIG. 1, the body of the manifold is provided with means for threadedly receiving the threaded neck of a C0 cartridge and sealing it to the gas-conducting chamber inwardly of the body of the manifold. It is to be understood that the capsule has a sealing disc of soft metal spanning its neck, such soft metal seal being adapted to be pierced when required, whereby to release the gas from the capsule so that it flows into the chamber in the manifold body through a passage therein and thence through an exit passage into the longitudinal bore in the valve body 11 through a radial passage therein.
The soft metal seal of the capsule 32 is pierced, when it is desired to inflate the inflatable article, by means including a cam lever in the form of a bell crank lever 40 having an elongated lever arm which lies generally horizontal (FIG. 1) when the lever is in retracted, inoperative position, and a generally vertical, shorter arm having a cam 39 on its lower end. The lever 40 is pivotally mounted upon a transverse pivot pin 42 which extends from one side of the manifold body to the other and spans a narrow, longitudinally extending leverreceiving slot which extends longitudinally of the body of the manifold at the top thereof and downwardly along the right-hand end of the manifold body.
Reciprocably and sealingly mounted in a circular cylindrical bore in body 22 forming a prolongation of the chamber therein is a needle plunger, the enlarged outer end or head of which is in the form of a cam follower. The plunger is constantly urged to the right into engagement with the cam 39 by a coil compression spring which acts between the head of the plunger and an annular shoulder at the left-hand end of the chamber in body 22. Coaxial of the plunger and forming a part thereof is a capsule seal-piercing needle, the sharpened left-hand end of which is spaced from the seal at the end of the neck of the capsule 32 when the lever 40 is in its retracted, inoperative position, as shown in FIG. 1.
When it is desired to release the gas from the capsule 32 in order to inflate the inflatable article, the lever 40 is swung clockwise about its mounting pivot shaft 42 until the high point of the cam 39 has passed through the position in which it engages the high point of the cam follower on the end of the head of the plunger 41. This causes the piercing needle first to be thrust to the left against the opposition of the spring 48 sufficiently to pierce the seal in the neck of the capsule 32, the spring thereafter thrusting the plunger to the right as the high point of its cam follower end travels downwardly on the cam 39 on lever 40, thereby to open the hole made in the soft metal seal in the neck of the capsule 32 by the needle. Such swinging of the lever 40 is accomplished by pulling a handle 45 on a lanyard cord generally designated 44, which is secured to the outer end of the longer arm of the lever 40, by a sleeve-like means 46 in the direction to the right in FIG. 1. The handle 45 is symmetrical about its longitudinal axis, having similar wings projecting in opposite directions from an axially extending circular cylindrical portion 84.
Provision is made for securing the lever 40 in the position of FIG. 1 by a wire seal (not shown) of small gauge which extends through a hole in lever 40 and passages in body 22 extending inwardly from oppositely disposed aligned recesses 51 therein. Such seal prevents the unwanted movement of the lever 40 in a seal-piercing direction, but may readily be broken by a deliberate, fairly strong pull exerted upon the handle 45 of the lanyard. The body 22 of the manifold is also provided at its upper left-hand corner (FIG. 1) with a broader recess into which the outer free end of the lever 40 protrudes, recess 50 receiving the inner end of the cord fastener 46, thereby allowing such fastener to overlie the portion of the body of the capsule 32 adjacent its neck so that it, the lanyard cord, and the handle 45 are generally out of the way until needed.
The bight of a loop 64 in the lanyard cord 44 extends through a hole in the ,outer end of the longer arm of lever 40, the two parallel portions 65 of the cord passing through the fastener 46, which is in the form of a flattened sleeve. Such sleeve is simultaneously crimped transversely at a longitudinally central position and two longitudinally spaced outer zones, the sleeve also being simultaneously deformed into a broad V-shaped portion. This may be done, for example, by engaging the sleeve by two longitudinally spaced, transverse dies which engage the sleeve near its outer ends on its lefthand surface to form indentations in outer zones of the sleeve, while a movable transverse die engages the central portion of the sleeve at its right-hand side to form indentation, simultaneously thrusting such central portion of the sleeve as a whole to the left.
As a result of such deformation, not only is the sleeve tightened very forcibly upon the runs 65 of the cord 44 at the crimped zones, but, upon the imposition of a pull on cord 44, the force with which the central deformed zone of the sleeve engages the runs of the cord is increased. Thus the sleeve fastener 46 retains the cord 44 so securely that there is no possibility of slippage of the cord in the fastener under any service condition, no matter how severe.
In FIGS. 2 and 3 there is shown a portion of an injection mold which not only forms the lanyard handle 45 but simultaneously connects it to the lanyard cord 44. In FIG. 3 there is shown a mold half 74 in which there is formed a cavity 75 which, together with a confronting identical cavity 75' in a similar confronting mold half 74 (FIG. 2), defines the handleforming cavity of the mold. Centrally of the cavity 75 in the mold part 74 there is formed a lanyard cord-receiving channel 78 which has a transverse shape of one-half circular cylinder, channel 78 cooperating with a similar, confronting half-circular cylindrical channel in the other mold half. A supply of lanyard cord is provided at the left-hand side of the mold half 74, the lanyard cord 44 entering the mold through a guide means 76, which cooperates with a similar guide half in the other mold part. A plurality of longitudinaly spaced parallel cord-flattening pins 80 are affixed to the mold half 74 centrally of the mold cavity 75 therein. The pins 80 cooperate with similar, aligned confronting pins 80 in the other mold half 74 as shown in FIG. 2. The pins 80, 80' are spaced longitudinally of the central portion of the cavity which is of circular cylindrical shape, there being two opposite wings 85 extending from a' generally circular cylindrical portion 84, and a bordering thickened rim on the resulting lanyard handle 45, as shown in FIG. 1.
The lanyard cord 44' in this instance is made of braided nylon filament, which is somewhat slippery and is ordinarily difficult to secure in a mold handle without the provision of bulky, unwanted fastening means. The use of the mold of FIGS. 2 and 3, however, produces a connection between the cord 44 and the handle 45 which exceeds the requirements imposed by commercial specifications for such article. The opposed pins 80, 80 strongly compress the lanyard cord 44 between their confronting inner ends when the mold is closed, as shown in FIG. 2. When the plastic material which is to form the handle 45 is injected under high pressure into the cavity 75, the portions 89 of the cord 44 which lie between the sets of opposed pins 80, is relatively undistorted and thus substantially retain their initial diameter. At the zones of transition between the larger diametered portions of the cord 44' and the flat tened portions 87 between the pins 80, 80', there are formed inwardly extending, relatively sharp lips of plastic material which tend endwise to restrict and partially to enclose the larger diametered portions of the lanyard cord within the handle. Not only that, but the pins 80, 80' form holes 86 in the portion 84 of the handle which communicate with the flattened zones 87 of the lanyard cord. Upon the solidification of the handle 45 and the opening of the mold 74, 74', the portions of the lanyard cord at the zones 87 tend to expand into such holes 86 and thus still further key or mechanically connect the lanyard cord to the central portion 84 of the handle. The portion of the cord 44 which protrudes outwardly beyond the larger end of the handle 45 may be then cut off, as by a hot wire cutter.
The body 22 of the manifold 14 may be made of any strong, durable, and impact-resistant material; as noted, it is preferably made as an integral molding of plastic material. Among plastic materials useful for this purpose are acetal resins, sold under the trade name DELRIN by Dupont, and polycarbonate resins, such as those sold under the trademark LEXAN by General Electric Company. The lanyard handle 45 may be made of any suitable strong, tough plastic material such as nylon.
Although the invention is illustrated and described with reference to a single preferred embodiment thereof, it is to be expressly understood that it is in no way limited to the disclosure of such a preferred embodiment, but is capable of numerous modifications within the spirit and scope of the appended claims.
What is claimed is:
1. The combination comprising a pull cord and a pull handle connected thereto, the handle being made of plastic material and being molded about the cord along the length of coterminous portions of the handle and cord, spaced zones of the cord within the handle having two opposite surfaces of the cord flattened, the handle having holes therein overlying said two opposite sur faces of the cord at said spaced zones, the plastic material at the boundaries of said zones having lip portions extending radially inwardly toward the axis of the cord .end mechanically keying the handle to the cord.
2. The combination. according to claim 1, wherein at the said zones only said two opposite surfaces of the cord are flattened and free of plastic material, the remainder of the surface of the cord within the handle being engaged by and mechanically bonded to the plastic material of the handle.
3. The combination according to claim 1, wherein the cord is formed of multi-filamentary material.
4. The method of forming a handle of plastic material and fastening it to a pull cord, comprising extending a length of cord across a mold having a handledefining cavity therein, at spaced intervals along the length of cord in the mold cavity compressing it and thus deforming it generally diametrically, and while the cord

Claims (5)

1. The combination comprising a pull cord and a pull handle connected thereto, the handle being made of plastic material and being molded about the cord along the length of coterminous portions of the handle and cord, spaced zones of the cord within the handle having two opposite surfaces of the cord flattened, the handle having holes therein overlying said two opposite surfaces of the cord at said spaced zones, the plastic material at the boundaries of said zones having lip portions extending radially inwardly toward the axis of the cord end mechanically keying the handle to the cord.
2. The combination according to claim 1, wherein at the said zones only said two opposite surfaces of the cord are flattened and free of plastic material, the remainder of the surface of the cord within the handle being engaged by and mechanically bonded to the plastic material of the handle.
3. The combination according to claim 1, wherein the cord is formed of multi-filamentary material.
4. The method of forming a handle of plastic material and fastening it to a pull cord, comprising extending a length of cord across a mold having a handledefining cavity therein, at spaced intervals along the length of cord in the mold cavity compressing it and thus deforming it generally diametrically, and while the cord is thus deformed injecting plastic material under pressure into the mold cavity and about the locally deformed cord to form a handle and to bond the handle mechanically to the cord.
5. A method according to claim 4, wherein the local compression of the cord is effected by opposed core members in the mold which mask the cord from the injected plastic material at the zones of the cord which they engage.
US412637A 1973-03-26 1973-11-05 Lanyard handle, method of and apparatus for forming same Expired - Lifetime US3911762A (en)

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US00344749A US3809288A (en) 1973-03-26 1973-03-26 Inflation manifold
US412637A US3911762A (en) 1973-03-26 1973-11-05 Lanyard handle, method of and apparatus for forming same

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397200A (en) * 1981-07-20 1983-08-09 Reynolds Edward R Shift lever handle structure and equipping method
US5099716A (en) * 1990-05-14 1992-03-31 Mackal Glenn H Inflator lever arm having protuberance resisting lanyard abrasion
US20050011011A1 (en) * 2003-07-18 2005-01-20 Oberndorfer Michael J. Tool holder and cord locking means

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135131A (en) * 1960-04-11 1964-06-02 Marmac Products Inc Push-pull cable construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135131A (en) * 1960-04-11 1964-06-02 Marmac Products Inc Push-pull cable construction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397200A (en) * 1981-07-20 1983-08-09 Reynolds Edward R Shift lever handle structure and equipping method
US5099716A (en) * 1990-05-14 1992-03-31 Mackal Glenn H Inflator lever arm having protuberance resisting lanyard abrasion
US20050011011A1 (en) * 2003-07-18 2005-01-20 Oberndorfer Michael J. Tool holder and cord locking means
US6865760B2 (en) 2003-07-18 2005-03-15 Michael J. Oberndorfer Tool holder and cord locking means

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