US20110316272A1 - Easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members - Google Patents
Easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members Download PDFInfo
- Publication number
- US20110316272A1 US20110316272A1 US12/821,542 US82154210A US2011316272A1 US 20110316272 A1 US20110316272 A1 US 20110316272A1 US 82154210 A US82154210 A US 82154210A US 2011316272 A1 US2011316272 A1 US 2011316272A1
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- cam
- latch
- disposed
- actuating device
- friction
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- 230000008878 coupling Effects 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 19
- 238000003032 molecular docking Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
- F16L37/18—Joints tightened by eccentrics or rotatable cams
Definitions
- This invention relates to a locking coupling assembly that couples two tubular members, more particularly to an easily unlatchable cam-lock actuating device for use in a locking coupling assembly which is operable to quickly connect and disconnect two tubular members.
- a conventional locking coupling assembly 10 disclosed in U.S. Pat. No. 5,435,604 is shown to include a cylindrical body 11 connected to a female coupling tube (not shown) , a male coupling tube 12 insertable into the cylindrical body 11 , two cam arms 13 pivotably mounted on the cylindrical body 11 by pivot pins 132 , and a seal ring 14 mounted on an inner surface of the cylindrical body 11 .
- Each of the cam arms 13 has a cam surface 1311 extending through a slot 114 into a bore 111 in the cylindrical body 11 for engaging the male coupling tube 12 in the bore 111 when the cam arm 13 is at a locking position.
- a spring-biased lock bolt 133 is movably received in a hole in each of the cam arms 13 such that a locking end 1331 extends through the hole to be inserted into a locking hole 116 in the cylindrical body 11 for retaining the cam arm 13 at the locking position.
- a pull ring 136 is attached to the lock bolt 133 such that, by pulling the pull ring 136 , the locking end 1331 is moved to be disengaged from the locking hole 116 so as to permit turning of the respective cam arm 13 to an unlocking position.
- the locking coupling assembly 10 can be used to quickly connect and disconnect two tubular members, such as hoses, pipes, etc.
- the pull ring 136 since the pull ring 136 includes a plurality of resilient loops to be hooked on the lock bolt 133 , tensile deformation of the loops may occur after numerous times of use. Moreover, gripping and pulling of the pull ring 136 is uncomfortable for the user since the pull ring 136 has a relatively small surface area.
- An object of the present invention is to provide an easily unlatchable cam-lock actuating device for use in a locking coupling assembly, which can be conveniently and comfortably operated to quickly connect and disconnect two tubular members.
- the easily unlatchable cam-lock actuating device includes a cam arm, a spring-loaded latch bolt unit, and a releasing lever.
- the cam arm has a cam-surfaced head that is disposed to extend into a fitting bore in a female tubular coupler of a locking coupling assembly, and an arm body that is disposed opposite to the cam-surfaced head.
- the cam arm is pivotally mounted on a lug unit of the female tubular coupler such that, when the arm body is turned to a locking position, the cam-surfaced head is moved to depress a male tubular end of a tubular member to thereby lock the male tubular end in the fitting bore.
- the spring-loaded latch bolt unit is disposed on the arm body, and includes a latch bolt and a spring.
- the latch bolt has a latch end and a latch shank extending from the latch end along a lengthwise line.
- the latch bolt is movable relative to the arm body along the lengthwise line to permit the latch end to engage a cavity of the female tubular coupler when the arm body is displaced to the locking position, thereby preventing the arm body from moving away from the locking position.
- the spring is disposed to bias the latch end toward the cavity.
- the releasing lever has weight and power ends opposite to each other, and is pivotally mounted on the arm body about a fulcrum axis such that the power end is turnable about the fulcrum axis between a latched position, where the power end is close to the lengthwise line, and an unlatched position, where the power end is remote from the lengthwise line.
- the weight end is coupled to the latch shank such that, when the power end is turned from the latched position to the unlatched position, the latch end is retracted and disengaged from the cavity against the biasing action of the spring.
- FIG. 1 is an exploded perspective view of conventional locking coupling assembly
- FIG. 2 is an exploded perspective view of the first preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention
- FIG. 3 is a perspective view of the first preferred embodiment
- FIG. 4 is a side view of the first preferred embodiment
- FIG. 5 is a sectional view taken along line V-V of FIG. 4 ;
- FIG. 6 is a sectional view taken along line VI-VI of FIG. 5 ;
- FIG. 7 is a sectional view similar to FIG. 5 , illustrating a releasing lever at an unlatched position
- FIG. 8 is a sectional view similar to FIG. 5 , illustrating the releasing lever at a latched position
- FIG. 9 is an exploded perspective view of the second preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention.
- FIG. 10 is a sectional view of the second preferred embodiment
- FIG. 11 is a sectional view taken along line XI-XI of FIG. 10 ;
- FIG. 12 is a sectional view similar to FIG. 10 , illustrating a releasing lever at an unlatched position
- FIG. 13 is an exploded perspective view of the third preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention.
- FIG. 14 is a sectional view of the third preferred embodiment
- FIG. 15 is a sectional view taken along line XV-XV of FIG. 14 ;
- FIG. 16 is a sectional view taken along line XVI-XVI of FIG. 14 ;
- FIG. 17 is a sectional view similar to FIG. 14 , illustrating a releasing lever at an unlatched position.
- the first preferred embodiment of an easily unlatchable cam-lock actuating device is used in a locking coupling assembly to couple two tubular members (not shown).
- the locking coupling assembly includes a female tubular coupler 100 which has an inner tubular surface defining a fitting bore 105 for receiving a male tubular end of one of the tubular members, and an outer tubular surface having a radial opening 104 that extends to be communicated with the fitting bore 105 , a lug unit 101 which is disposed on the outer tubular surface adjacent to the radial opening 104 , and a ledge 102 which is disposed on the outer tubular surface and adjacent to the radial opening 104 , and which has a cavity 103 .
- the cam-lock actuating device of this embodiment is shown to comprise a cam arm 20 , a spring-loaded latch bolt unit 40 , and a releasing lever 30 .
- the cam arm 20 has a cam-surfaced head 201 that is disposed to extend into the fitting bore 104 , and an arm body 202 that is disposed opposite to the cam-surfaced head 201 , and is pivotally mounted on the lug unit 101 about a pivot axis 21 .
- the cam-surfaced head 201 is moved to depress the male tubular end of the respective tubular member to thereby lock the male tubular end in the fitting bore 105 .
- the arm body 202 has a receiving bore 22 extending along a lengthwise line, and a pivot portion 23 extending to terminate at a joint surface 231 .
- the spring-loaded latch bolt unit 40 is disposed in the receiving bore 22 , and includes a latch bolt 41 , a spring 42 , and a positioning ring 43 .
- the latch bolt 41 has a latch end 411 and a latch shank 412 extending from the latch end 411 along the lengthwise line, and is movable along the receiving bore 22 to permit the latch end 411 to engage the cavity 103 when the arm body 202 is displaced to the locking position, thereby preventing the arm body 202 from moving away from the locking position.
- the positioning ring 43 is press-fitted into the receiving bore 22 .
- the spring 42 is disposed to abut against the positioning ring 43 and the latch bolt 41 so as to bias the latch end 411 toward the cavity 103 .
- the latch end 411 has a tapered shape to facilitate engagement with the cavity 103 .
- the latch shank 412 has a slotted keyway 4121 extending along the lengthwise line to terminate at proximate and distal regions 4123 , 4124 relative to the cavity 103 , and a docking port 4122 extending transversely from the distal region 4124 and defined by a docking shoulder 4125 .
- the releasing lever 30 has weight and power ends 31 , 33 disposed opposite to each other, and a fulcrum portion 35 pivotally mounted on the lug portion 23 by a pivot pin 32 about a fulcrum axis parallel to the pivot axis 21 .
- the power end 33 is turnable about the fulcrum axis 32 between a latched position, as shown in FIG. 5 , where the power end 33 is close to the lengthwise line, and an unlatched position, as shown in FIG. 7 , where the power end 33 is remote from the lengthwise line.
- the joint surface 231 is disposed to angularly surround the fulcrum axis 32 .
- a friction wall 36 is disposed on the releasing lever 30 between the fulcrum axis 32 and the power end 33 , and is in slidable friction engagement with the joint surface 231 .
- a key 34 is disposed to extend through a hole 311 in the weight end 31 and is slidable in the slotted keyway 4121 .
- the joint surface 231 , the friction wall 36 , the docking shoulder 4125 , and the key 34 cooperatively serve as a counter-force generating mechanism.
- the key 34 is moved from the proximate region 4123 to the distal region 4124 and is subsequently anchored on the docking shoulder 4125 , and the latch bolt 41 is moved along the receiving bore 22 against the biasing action of the spring 42 so that the latch end 411 is retracted and disengaged from the cavity 103 .
- the weight end 31 is vested with a counter-force to counteract the biasing action of the spring 42 so as to retain the power end 33 at the unlatched position, thereby facilitating a user's grip of the cam arm 20 to subsequently perform an unlocking operation of the locking coupling assembly.
- the key 34 is moved in the distal region 4124 such that the latch bolt 41 is moved toward the ledge 102 to permit the latch end 411 to be inserted into the cavity 103 by virtue of the biasing action of the spring 42 .
- the tapered configuration of the latch end 411 may facilitate the insertion of the latch end 411 into the cavity 103 .
- the latch bolt 41 is moved by operating the releasing lever 30 instead of pulling of a pull ring as in the prior art, the locking and unlocking operations of the locking coupling assembly can be effortlessly and conveniently performed.
- the second preferred embodiment of an easily unlatchable cam-lock actuating device is similar to the previous embodiment in construction.
- the latch shank 41 has a pressed wall 413 which is spaced apart from the latch end 411 along the lengthwise line by a space 414 .
- the weight end 31 of the releasing lever 30 is configured to extend into the space 414 to press the pressed wall 413 so as to permit the latch end 411 to be retracted and to be disengaged from the cavity 103 when the power end 33 is turned to the unlatched position, as shown in FIG. 12 .
- the counter-force generating mechanism includes a retaining wall 24 which is disposed on the arm body 202 and which is spaced apart from the fulcrum axis 32 , and a friction region 37 which is disposed on the releasing lever 30 and which is angularly displaced from the weight end 31 about the fulcrum axis 32 such that, as a result of displacement of the power end 33 to the unlatched position, the friction region 37 is brought into frictional engagement with the retaining wall 24 by a friction force serving as the counter-force so as to retain the power end 33 in the unlatched position.
- the third preferred embodiment of an easily unlatchable cam-lock actuating device is similar to the previous embodiments in construction.
- the weight end 31 of the releasing lever 30 includes a friction segment 312 extending from the fulcrum portion 35 , and a pressing segment 313 which is pivotably mounted on the friction segment 312 by a pivot pin 38 about a turning axis parallel to the fulcrum axis 32 , and which has a first cam surface 314 .
- the latch shank 412 has a second cam surface 415 which mates with the first cam surface 314 such that, as shown in FIG.
- the counter-force generating mechanism includes a friction wall 315 which is disposed on the friction segment 312 between the turning axis 38 and the fulcrum axis 32 such that, as a result of displacement of the power end 33 to the unlatched position, the friction wall 315 is brought into frictional engagement with the pressing segment 313 by a friction force serving as the counter-force.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
- 1. Field of the Invention
- This invention relates to a locking coupling assembly that couples two tubular members, more particularly to an easily unlatchable cam-lock actuating device for use in a locking coupling assembly which is operable to quickly connect and disconnect two tubular members.
- 2. Description of the Related Art
- Referring to
FIG. 1 , a conventionallocking coupling assembly 10 disclosed in U.S. Pat. No. 5,435,604 is shown to include acylindrical body 11 connected to a female coupling tube (not shown) , amale coupling tube 12 insertable into thecylindrical body 11, twocam arms 13 pivotably mounted on thecylindrical body 11 bypivot pins 132, and aseal ring 14 mounted on an inner surface of thecylindrical body 11. Each of thecam arms 13 has acam surface 1311 extending through aslot 114 into abore 111 in thecylindrical body 11 for engaging themale coupling tube 12 in thebore 111 when thecam arm 13 is at a locking position. A spring-biased lock bolt 133 is movably received in a hole in each of thecam arms 13 such that a lockingend 1331 extends through the hole to be inserted into alocking hole 116 in thecylindrical body 11 for retaining thecam arm 13 at the locking position. Apull ring 136 is attached to thelock bolt 133 such that, by pulling thepull ring 136, the lockingend 1331 is moved to be disengaged from thelocking hole 116 so as to permit turning of therespective cam arm 13 to an unlocking position. Thus, thelocking coupling assembly 10 can be used to quickly connect and disconnect two tubular members, such as hoses, pipes, etc. - However, since the
pull ring 136 includes a plurality of resilient loops to be hooked on thelock bolt 133, tensile deformation of the loops may occur after numerous times of use. Moreover, gripping and pulling of thepull ring 136 is uncomfortable for the user since thepull ring 136 has a relatively small surface area. - An object of the present invention is to provide an easily unlatchable cam-lock actuating device for use in a locking coupling assembly, which can be conveniently and comfortably operated to quickly connect and disconnect two tubular members.
- According to this invention, the easily unlatchable cam-lock actuating device includes a cam arm, a spring-loaded latch bolt unit, and a releasing lever.
- The cam arm has a cam-surfaced head that is disposed to extend into a fitting bore in a female tubular coupler of a locking coupling assembly, and an arm body that is disposed opposite to the cam-surfaced head. The cam arm is pivotally mounted on a lug unit of the female tubular coupler such that, when the arm body is turned to a locking position, the cam-surfaced head is moved to depress a male tubular end of a tubular member to thereby lock the male tubular end in the fitting bore.
- The spring-loaded latch bolt unit is disposed on the arm body, and includes a latch bolt and a spring. The latch bolt has a latch end and a latch shank extending from the latch end along a lengthwise line. The latch bolt is movable relative to the arm body along the lengthwise line to permit the latch end to engage a cavity of the female tubular coupler when the arm body is displaced to the locking position, thereby preventing the arm body from moving away from the locking position. The spring is disposed to bias the latch end toward the cavity.
- The releasing lever has weight and power ends opposite to each other, and is pivotally mounted on the arm body about a fulcrum axis such that the power end is turnable about the fulcrum axis between a latched position, where the power end is close to the lengthwise line, and an unlatched position, where the power end is remote from the lengthwise line. The weight end is coupled to the latch shank such that, when the power end is turned from the latched position to the unlatched position, the latch end is retracted and disengaged from the cavity against the biasing action of the spring.
- Since the latch bolt is moved by operating the releasing lever, the locking and unlocking operations of the locking coupling assembly can be effortlessly and conveniently performed.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments of the invention, with reference to the accompanying drawings, in which:
-
FIG. 1 is an exploded perspective view of conventional locking coupling assembly; -
FIG. 2 is an exploded perspective view of the first preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention; -
FIG. 3 is a perspective view of the first preferred embodiment; -
FIG. 4 is a side view of the first preferred embodiment; -
FIG. 5 is a sectional view taken along line V-V ofFIG. 4 ; -
FIG. 6 is a sectional view taken along line VI-VI ofFIG. 5 ; -
FIG. 7 is a sectional view similar toFIG. 5 , illustrating a releasing lever at an unlatched position; -
FIG. 8 is a sectional view similar toFIG. 5 , illustrating the releasing lever at a latched position; -
FIG. 9 is an exploded perspective view of the second preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention; -
FIG. 10 is a sectional view of the second preferred embodiment; -
FIG. 11 is a sectional view taken along line XI-XI ofFIG. 10 ; -
FIG. 12 is a sectional view similar toFIG. 10 , illustrating a releasing lever at an unlatched position; -
FIG. 13 is an exploded perspective view of the third preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention; -
FIG. 14 is a sectional view of the third preferred embodiment; -
FIG. 15 is a sectional view taken along line XV-XV ofFIG. 14 ; -
FIG. 16 is a sectional view taken along line XVI-XVI ofFIG. 14 ; and -
FIG. 17 is a sectional view similar toFIG. 14 , illustrating a releasing lever at an unlatched position. - Before the present invention is described in greater detail, it should be noted that same reference numerals have been used to denote like elements throughout the specification.
- Referring to
FIGS. 2 to 6 , the first preferred embodiment of an easily unlatchable cam-lock actuating device according to the present invention is used in a locking coupling assembly to couple two tubular members (not shown). The locking coupling assembly includes a femaletubular coupler 100 which has an inner tubular surface defining afitting bore 105 for receiving a male tubular end of one of the tubular members, and an outer tubular surface having aradial opening 104 that extends to be communicated with thefitting bore 105, alug unit 101 which is disposed on the outer tubular surface adjacent to theradial opening 104, and aledge 102 which is disposed on the outer tubular surface and adjacent to theradial opening 104, and which has acavity 103. The cam-lock actuating device of this embodiment is shown to comprise acam arm 20, a spring-loadedlatch bolt unit 40, and a releasinglever 30. - The
cam arm 20 has a cam-surfacedhead 201 that is disposed to extend into thefitting bore 104, and anarm body 202 that is disposed opposite to the cam-surfacedhead 201, and is pivotally mounted on thelug unit 101 about apivot axis 21. Thus, when thearm body 202 is turned to a locking position, the cam-surfacedhead 201 is moved to depress the male tubular end of the respective tubular member to thereby lock the male tubular end in thefitting bore 105. Thearm body 202 has areceiving bore 22 extending along a lengthwise line, and apivot portion 23 extending to terminate at ajoint surface 231. - The spring-loaded
latch bolt unit 40 is disposed in thereceiving bore 22, and includes alatch bolt 41, aspring 42, and apositioning ring 43. Thelatch bolt 41 has alatch end 411 and alatch shank 412 extending from thelatch end 411 along the lengthwise line, and is movable along thereceiving bore 22 to permit thelatch end 411 to engage thecavity 103 when thearm body 202 is displaced to the locking position, thereby preventing thearm body 202 from moving away from the locking position. Thepositioning ring 43 is press-fitted into thereceiving bore 22. Thespring 42 is disposed to abut against thepositioning ring 43 and thelatch bolt 41 so as to bias thelatch end 411 toward thecavity 103. Thelatch end 411 has a tapered shape to facilitate engagement with thecavity 103. Thelatch shank 412 has aslotted keyway 4121 extending along the lengthwise line to terminate at proximate anddistal regions cavity 103, and adocking port 4122 extending transversely from thedistal region 4124 and defined by adocking shoulder 4125. - The releasing
lever 30 has weight andpower ends fulcrum portion 35 pivotally mounted on thelug portion 23 by apivot pin 32 about a fulcrum axis parallel to thepivot axis 21. Thus, thepower end 33 is turnable about thefulcrum axis 32 between a latched position, as shown inFIG. 5 , where thepower end 33 is close to the lengthwise line, and an unlatched position, as shown inFIG. 7 , where thepower end 33 is remote from the lengthwise line. - The
joint surface 231 is disposed to angularly surround thefulcrum axis 32. Afriction wall 36 is disposed on the releasinglever 30 between thefulcrum axis 32 and thepower end 33, and is in slidable friction engagement with thejoint surface 231. In addition, akey 34 is disposed to extend through ahole 311 in theweight end 31 and is slidable in the slottedkeyway 4121. Thejoint surface 231, thefriction wall 36, thedocking shoulder 4125, and the key 34 cooperatively serve as a counter-force generating mechanism. - Referring to
FIG. 7 , when thepower end 33 is manually operated to turn from the latched position to the unlatched position, the key 34 is moved from theproximate region 4123 to thedistal region 4124 and is subsequently anchored on thedocking shoulder 4125, and thelatch bolt 41 is moved along the receiving bore 22 against the biasing action of thespring 42 so that thelatch end 411 is retracted and disengaged from thecavity 103. By virtue of the frictional engagement between the key 34 and thedocking shoulder 4125, and by virtue of the frictional engagement between thejoint surface 231 and thefriction wall 36, theweight end 31 is vested with a counter-force to counteract the biasing action of thespring 42 so as to retain thepower end 33 at the unlatched position, thereby facilitating a user's grip of thecam arm 20 to subsequently perform an unlocking operation of the locking coupling assembly. - Referring to
FIG. 8 , when thearm body 202 is turned to the locking position, and when thepower end 33 of the releasinglever 30 is turned to the latched position, the key 34 is moved in thedistal region 4124 such that thelatch bolt 41 is moved toward theledge 102 to permit thelatch end 411 to be inserted into thecavity 103 by virtue of the biasing action of thespring 42. The tapered configuration of thelatch end 411 may facilitate the insertion of thelatch end 411 into thecavity 103. - As illustrated, since the
latch bolt 41 is moved by operating the releasinglever 30 instead of pulling of a pull ring as in the prior art, the locking and unlocking operations of the locking coupling assembly can be effortlessly and conveniently performed. - Referring to
FIGS. 9 to 11 , the second preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention is similar to the previous embodiment in construction. In the second embodiment, thelatch shank 41 has a pressedwall 413 which is spaced apart from thelatch end 411 along the lengthwise line by aspace 414. Theweight end 31 of the releasinglever 30 is configured to extend into thespace 414 to press the pressedwall 413 so as to permit thelatch end 411 to be retracted and to be disengaged from thecavity 103 when thepower end 33 is turned to the unlatched position, as shown inFIG. 12 . In addition, the counter-force generating mechanism includes a retainingwall 24 which is disposed on thearm body 202 and which is spaced apart from thefulcrum axis 32, and afriction region 37 which is disposed on the releasinglever 30 and which is angularly displaced from theweight end 31 about thefulcrum axis 32 such that, as a result of displacement of thepower end 33 to the unlatched position, thefriction region 37 is brought into frictional engagement with the retainingwall 24 by a friction force serving as the counter-force so as to retain thepower end 33 in the unlatched position. - Referring to
FIGS. 13 to 16 , the third preferred embodiment of an easily unlatchable cam-lock actuating device according to this invention is similar to the previous embodiments in construction. In the third embodiment, theweight end 31 of the releasinglever 30 includes afriction segment 312 extending from thefulcrum portion 35, and apressing segment 313 which is pivotably mounted on thefriction segment 312 by apivot pin 38 about a turning axis parallel to thefulcrum axis 32, and which has afirst cam surface 314. Thelatch shank 412 has asecond cam surface 415 which mates with thefirst cam surface 314 such that, as shown inFIG. 17 , turning of thepower end 33 about thefulcrum axis 32 toward the unlatched position results in transverse movement of thepressing segment 313 relative to the lengthwise line to thereby permit thelatch end 411 to disengage from thecavity 103. In addition, the counter-force generating mechanism includes afriction wall 315 which is disposed on thefriction segment 312 between the turningaxis 38 and thefulcrum axis 32 such that, as a result of displacement of thepower end 33 to the unlatched position, thefriction wall 315 is brought into frictional engagement with thepressing segment 313 by a friction force serving as the counter-force. - While the present invention has been described in connection with what are considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretations and equivalent arrangements.
Claims (8)
Priority Applications (1)
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US12/821,542 US8083265B1 (en) | 2010-06-23 | 2010-06-23 | Easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members |
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US12/821,542 US8083265B1 (en) | 2010-06-23 | 2010-06-23 | Easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members |
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US8083265B1 US8083265B1 (en) | 2011-12-27 |
US20110316272A1 true US20110316272A1 (en) | 2011-12-29 |
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US12/821,542 Expired - Fee Related US8083265B1 (en) | 2010-06-23 | 2010-06-23 | Easily unlatchable cam-lock actuating device for use in a locking coupling assembly that couples two tubular members |
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DE9303353U1 (en) * | 1993-03-08 | 1993-05-06 | Chen, Waterson, Ta-Li Hsiang, Taichung | Pipe connection device |
US5435604A (en) * | 1994-07-21 | 1995-07-25 | Chen; Waterson | Tube connecting device |
US5816623A (en) * | 1995-07-12 | 1998-10-06 | Chang; King | Self-locking quick disconnect coupling device |
US5722697A (en) * | 1996-04-10 | 1998-03-03 | Chen; Waterson | Fitting with two tubular members rotatable relative to each other |
US6015168A (en) * | 1997-05-08 | 2000-01-18 | Dover Corp. | Pivotal lock for coupling cam arms |
JP3314009B2 (en) * | 1997-07-09 | 2002-08-12 | 日東工器株式会社 | Pipe fittings |
US6053540A (en) * | 1997-08-14 | 2000-04-25 | Meyer; Richard Ernest | Fluid conducting coupling |
US5911445A (en) * | 1997-11-24 | 1999-06-15 | Lee; Shen-Chih | Hose coupling with safety locking means |
US6224113B1 (en) * | 1999-11-02 | 2001-05-01 | Kuo-Piao Chien | Locking device for a quick release coupling |
GB0008388D0 (en) * | 2000-04-06 | 2000-05-24 | Fort Vale Eng Ltd | Tube connecting device |
US6447016B2 (en) * | 2000-05-16 | 2002-09-10 | National Equipment Corp. | Passive locking cam and groove coupling |
US6371523B1 (en) * | 2000-05-24 | 2002-04-16 | Waterson Chen | Position-recoverable pulling device adapted for use in a fitting that couples two tubular members |
US6543812B1 (en) * | 2002-04-22 | 2003-04-08 | King Chang | Self-locking quick release coupler adapted to a groove adapter |
-
2010
- 2010-06-23 US US12/821,542 patent/US8083265B1/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140197628A1 (en) * | 2013-01-16 | 2014-07-17 | Consolidated Edison Company Of New York, Inc. | Safety connector |
US9512947B2 (en) * | 2013-01-16 | 2016-12-06 | Consolidated Edison Company Of New York, Inc. | Safety connector |
JP2017137940A (en) * | 2016-02-04 | 2017-08-10 | 旺松 陳 | Pipe joint engagement lever |
WO2018117995A1 (en) * | 2016-12-24 | 2018-06-28 | Jeffrey Hartman | Double cam levers and safety lock for cam lock fitting |
WO2020176065A1 (en) * | 2019-02-25 | 2020-09-03 | Jeffrey Hartman | Ergonomic safety lock for cam lock fitting |
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