CA1137447A - Threaded gas cap - Google Patents
Threaded gas capInfo
- Publication number
- CA1137447A CA1137447A CA000369918A CA369918A CA1137447A CA 1137447 A CA1137447 A CA 1137447A CA 000369918 A CA000369918 A CA 000369918A CA 369918 A CA369918 A CA 369918A CA 1137447 A CA1137447 A CA 1137447A
- Authority
- CA
- Canada
- Prior art keywords
- closure
- shell
- generally
- radially
- torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
Abstract of the Disclosure A threaded fuel tank filler neck cap of the type including a closure member for insertion into the filler neck to close it, a gasket for sealing against the lip formed at the axially outer end of the filler neck and a shell providing a hand grip. The shell and closure member are connected by cooperating pawl teeth and ratchet teeth to provide a driving connection between the shell and the closure in the cap-removal direction and a torque-limited driving connection between the shell and closure in the cap-advancing direction to protect the gasket against damage due to overtightening. Pawl fingers extend radially from a radially inwardly facing wall of the shell and generally concentrically with the radially inwardly facing wall to support the pawl teeth in engagement with the ratchet teeth.
Each pawl tooth includes a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface.
Each ratchet tooth includes a generally radially and axially extending locking surface cooperating with the locking surface of at least one of the pawl teeth to establish the driving connection in the cap-removal direction, and a generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection in the cap-advancing direction.
Each pawl tooth includes a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface.
Each ratchet tooth includes a generally radially and axially extending locking surface cooperating with the locking surface of at least one of the pawl teeth to establish the driving connection in the cap-removal direction, and a generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection in the cap-advancing direction.
Description
1~3744~
This invention relates to caps for fuel tank filler necks, and more particularly to a novel construction for the so-called torque-override threaded filler neck cap.
Torque-override threaded fuel tank filler neck caps are known. There are, for example, the caps of U.S. Patents 3,815,776 and 3,986,634. In these structures, the hand-grip providing member includes a plurality of ratchet teeth, each including a locking surface and a torque-override surface.
The closure of that structure is provided with a plurality of 10. pawl fingers extending somewhat concentrically with the wall upon which the ratchet teeth are formed, and provided at their ends remote from their connection to the closure member, with pawl teeth for engaging the ratchet teeth. Each pawl tooth also includes a locking surface cooperating with the locking surface of at least one of the ratchet teeth to provide a driving connection in a cap-removal direction, and a torque-override surface cooperating with a torque-override surface of at least one of the ratchet teeth to provide the torque-limited driving connection in the direction which 20. advances the cap on the filler neck.
The structure of the present invention provides an alternative to this prior art structure. The inventive structure is believed to provide better control of the overriding torque, or so-called "breakaway torque," of the cap. That is, the structure of the present invention is believed to provide a better control of the maximum torque to which the gasket is tightened. Typically, the components of such a cap are molded from plastic materials and the like.
Unless the components are carefully designed, variations due 30- to the materials used, the molding process, and related
This invention relates to caps for fuel tank filler necks, and more particularly to a novel construction for the so-called torque-override threaded filler neck cap.
Torque-override threaded fuel tank filler neck caps are known. There are, for example, the caps of U.S. Patents 3,815,776 and 3,986,634. In these structures, the hand-grip providing member includes a plurality of ratchet teeth, each including a locking surface and a torque-override surface.
The closure of that structure is provided with a plurality of 10. pawl fingers extending somewhat concentrically with the wall upon which the ratchet teeth are formed, and provided at their ends remote from their connection to the closure member, with pawl teeth for engaging the ratchet teeth. Each pawl tooth also includes a locking surface cooperating with the locking surface of at least one of the ratchet teeth to provide a driving connection in a cap-removal direction, and a torque-override surface cooperating with a torque-override surface of at least one of the ratchet teeth to provide the torque-limited driving connection in the direction which 20. advances the cap on the filler neck.
The structure of the present invention provides an alternative to this prior art structure. The inventive structure is believed to provide better control of the overriding torque, or so-called "breakaway torque," of the cap. That is, the structure of the present invention is believed to provide a better control of the maximum torque to which the gasket is tightened. Typically, the components of such a cap are molded from plastic materials and the like.
Unless the components are carefully designed, variations due 30- to the materials used, the molding process, and related
-2- ~
~3'~ q variables can result in unacceptable variations in breakaway torque and other cap parameters from batch to batch of the molded parts.
According to the invention, a fuel tank filler neck cap comprises a closure member for insertion into a threaded filler neck to close it, a gasket for sealing against the lip formed at the axially outer end of the filler neck, and a shell member providing a hand grip. The gasket is mounted on the closure member near its axially outer end, and the shell 10. member and closure member include cooperating means providing a driving connection between the shell and the closure member in a cap-removal direction and a torque-limited driving connection between the shell and closure member in the cap-advancing direction to protect the gasket against overtightening. The cooperating means includes a plurality of radially deflectable pawl fingers formed on the shell, the pawl fingers extending radially from a first radially facing wall provided on the shell and then generally concentrically with the first wall, or parallel to the first wall. The pawl 20. fingers are provided at their ends remote from the first wall with pawl teeth. Each pawl tooth is provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface. The cooperating means further includes a second generally radially facing wall on the closure member. The second wall provides a plurality of ratchet teeth, with each ratchet tooth including a first generally radially and axially extending locking surface cooperating with a locking surface of at least one of the 30- pawl teeth to establish the driving connection between the ~3744~7 shell and closure in the cap-removal direction. Each ratchet tooth further includes a second generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection between the shell and closure in the cap-advancing direction.
The invention may be best understood by referring to the following description and accompanying drawings which illustrate the invention. In the drawings:
10. Fig. 1 is a vertical section view of the molded plastic fuel tank filler neck cap of the instant invention;
and Fig. 2 is a bottom plan view of the cap of Fig. 1 taken generally along section lines 2-2 thereof.
Referring now to Fig. 1, the fuel tank filler neck cap 10 of the instant invention includes a closure 12 having an axially outer portion 14 and an axially inner portion 16.
Cap 10 also includes a shell 18 which provides a hand grip.
A ring 20 fastens shell 18 and closure 12 together.
20. Referring now to Fig. 2, the radially inwardly facing surface 22 of shell 18 is provided with a plurality of inwardly extending ribs 24. Ribs 24 engage recesses 28 spaced peripherally about pawl ring 26. A set of equicentric pawl fingers 30 are connected to a radially inwardly facing surface 31 of ring 26 by base portions 32. Fingers 30 extend generally concentrically from their bases, parallel to surface 31. The distal end of each pawl finger 30 is formed to provide a tooth 34 having a first generally radially and axially extending locking surface 36 and a second generally 30- chordally and axially extending torque-override surface 38.
1~3'7~47 The axially outermost portion 40 (Fig. 1) of closure 12 is formed to provide a set of equicentric teeth 44 on a radially outwardly facing surface 45 thereof. Each tooth 44 has a first generally radially and axially extending locking surface 46 and a second generally chordally and axially extending torque-override surface 48.
Teeth 44 of closure 12 and teeth 34 of pawl fingers 30 are situated for engagement when closure 12 and cap 18 are rotated relative to one another. If, for example, shell 18 - 10. is rotated in the cap-removal direction (i.e., clockwise as viewed from the bottom of cap 10 in Fig. 2), the generally radially and axially extending locking surfaces 36 of teeth 34 and the generally radially and axially extending locking surfaces of teeth 44 engage in a locking relationship, rotating closure 12 in the cap-removal direction. This is - the situation when cap 10 is being loosened. However, if shell 18 is rotated in the cap-advancing direction (i.e., counterclockwise as viewed from the bottom of cap 10 in Fig.
2), the generally chordally and axially extending 20. torque-override surfaces 38 of teeth 34 will engage the generally chordally and axially extending torque-override surfaces 48 of teeth 44, exerting a rotating pressure on closure 12. This is the situation when cap 10 is being tightened on the filler neck.
Thus, the instant invention provides a cap in which overtightening is eliminated by the slippage of the second generally chordally and axially extending torque-override surfaces 38, 48 of teeth 34, 44. Upon loosening of the cap, the generally radially and axially extending locking surfaces 30- 36, 46 of teeth 34, 44 engage in a locking relationship in 1~37447 which there is no slippage. The overriding torque required to permit slippage in the cap-advancing direction (counterclockwise in Fig. 2) is determined by the flexibility of pawl fingers 30 and base members 32, and the inclination of the chordally extending surfaces 48.
Referring now to Fig. 1, a fuel tank filler neck 54 has threads 56 which engage threads 58 of the axially inner portion 16 of closure 12. A radially extending wall 60 of closure 12 retains an O-ring gasket 62 adjacent an axially 10. inwardly facing surface of axially outer portion 14 of closure 12. When cap 10 is threaded onto neck 54, gasket 62 seats against flange 64 of neck 54, creating a seal between closure 12 and neck 54. A principal consideration in determining the desirable overriding torque between closure 12 and shell 18 is gasket 62. The overriding torque must be so determined to prevent excessive compression of gasket 62 against flange 64 of neck 54, and resulting damage to gasket 62.
Closure 12 includes a pressure-vacuum vent valve 20. housing 68 which supports a pressure-vacuum vent valve assembly 70. Assembly 70 controls the venting of fuel vapors at a predetermined pressure out of the fuel tank through housing orifice 72 and between closure 12 and shell 18 to the atmosphere. Assembly 70 also controls the venting of air through orifice 72 of housing 68 into the fuel tank when the pressure in the tank decreases to a predetermined level.
Assembly 70 includes pressure-venting disc 74 having an axially inwardly facing circwnferential bead 76 which seats against housing 68 and a central aperture 78. Stem 80 of vacuum venting disc 82 is loosely received within aperture 78 1~374~7 of pressure disc 74. Vacuum disc 82 includes a circumferential valve bead 84 which seats against the axially inward surface of pressure disc 74. A spring 86 is disposed between housing 68 and vacuum disc 82 to maintain vacuum disc 82 in a seating relationship against pressure disc 74. A
spring 90 is disposed between a spring retainer cup 92 and a spring retainer 94 to maintain pressure disc 74 in a seating relationship with housing 68. Cup 92 rests on the axially outward surface of pressure disc 74 and retainer 94 is 10. press-fitted into a recess provided in axially outermost portion 40 of closure 12.
Shell 18 includes a peripheral and axially inwardly extending skirt 100. Skirt 100 is circumscribed by a peripheral groove 102 and a pointed lip 104. Retainer ring 20 includes a radially outer, axially outwardly extending portion 110 and a radially inner, axially outwardly extending portion 112 joined by an axially inner radially extending web portion 114. Portion 112 is provided at its axially outer extent with a surface 116 for supporting axially outer 20. portion 14 of closure 12. As shown in Fig. 2, axially outer portion 14 of closure 12 is provided with fingers 118 separated by spaces 120. Fingers 118 rest upon axially outer surface 112 of retainer ring 20. An axially inwardly projecting spacer ring 121 is formed on the axially inner surface 123 of shell 18. The axially inner end of ring 121 is closely spaced to ring 26 to insure the axial alignment of all of the cap 10 components. Spaces 120 between fingers 118 provide for communication between the atmosphere and pressure-vacuum vent valve assembly 70. Referring again to 30- Fig. 1, a radially inwardly extending flange 122 extends ~37~7 about the inner periphery of the radially outer, axially outwardly extending portion 110 of ring 20. Flange 122 engages lip 104 of skirt 100 in a locking relationship to retain ring 100 on shell 18. Thus, ring 20 acts as a radially inward extension of skirt 100 to hold axially outer portion 14 of closure 12 within shell 18. This structure is described in considerable detail in U.S. Patent 4,091,955.
It may be noted that shell 18, ring 20, pawl ring 26, and closure 12 are all susceptible of manufacture by the 10. molding of high impact plastics. In this regard, it may be appreciated that the retention of flange 122 by lip 104 can be a snap fit if plastics are used.
-
~3'~ q variables can result in unacceptable variations in breakaway torque and other cap parameters from batch to batch of the molded parts.
According to the invention, a fuel tank filler neck cap comprises a closure member for insertion into a threaded filler neck to close it, a gasket for sealing against the lip formed at the axially outer end of the filler neck, and a shell member providing a hand grip. The gasket is mounted on the closure member near its axially outer end, and the shell 10. member and closure member include cooperating means providing a driving connection between the shell and the closure member in a cap-removal direction and a torque-limited driving connection between the shell and closure member in the cap-advancing direction to protect the gasket against overtightening. The cooperating means includes a plurality of radially deflectable pawl fingers formed on the shell, the pawl fingers extending radially from a first radially facing wall provided on the shell and then generally concentrically with the first wall, or parallel to the first wall. The pawl 20. fingers are provided at their ends remote from the first wall with pawl teeth. Each pawl tooth is provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface. The cooperating means further includes a second generally radially facing wall on the closure member. The second wall provides a plurality of ratchet teeth, with each ratchet tooth including a first generally radially and axially extending locking surface cooperating with a locking surface of at least one of the 30- pawl teeth to establish the driving connection between the ~3744~7 shell and closure in the cap-removal direction. Each ratchet tooth further includes a second generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection between the shell and closure in the cap-advancing direction.
The invention may be best understood by referring to the following description and accompanying drawings which illustrate the invention. In the drawings:
10. Fig. 1 is a vertical section view of the molded plastic fuel tank filler neck cap of the instant invention;
and Fig. 2 is a bottom plan view of the cap of Fig. 1 taken generally along section lines 2-2 thereof.
Referring now to Fig. 1, the fuel tank filler neck cap 10 of the instant invention includes a closure 12 having an axially outer portion 14 and an axially inner portion 16.
Cap 10 also includes a shell 18 which provides a hand grip.
A ring 20 fastens shell 18 and closure 12 together.
20. Referring now to Fig. 2, the radially inwardly facing surface 22 of shell 18 is provided with a plurality of inwardly extending ribs 24. Ribs 24 engage recesses 28 spaced peripherally about pawl ring 26. A set of equicentric pawl fingers 30 are connected to a radially inwardly facing surface 31 of ring 26 by base portions 32. Fingers 30 extend generally concentrically from their bases, parallel to surface 31. The distal end of each pawl finger 30 is formed to provide a tooth 34 having a first generally radially and axially extending locking surface 36 and a second generally 30- chordally and axially extending torque-override surface 38.
1~3'7~47 The axially outermost portion 40 (Fig. 1) of closure 12 is formed to provide a set of equicentric teeth 44 on a radially outwardly facing surface 45 thereof. Each tooth 44 has a first generally radially and axially extending locking surface 46 and a second generally chordally and axially extending torque-override surface 48.
Teeth 44 of closure 12 and teeth 34 of pawl fingers 30 are situated for engagement when closure 12 and cap 18 are rotated relative to one another. If, for example, shell 18 - 10. is rotated in the cap-removal direction (i.e., clockwise as viewed from the bottom of cap 10 in Fig. 2), the generally radially and axially extending locking surfaces 36 of teeth 34 and the generally radially and axially extending locking surfaces of teeth 44 engage in a locking relationship, rotating closure 12 in the cap-removal direction. This is - the situation when cap 10 is being loosened. However, if shell 18 is rotated in the cap-advancing direction (i.e., counterclockwise as viewed from the bottom of cap 10 in Fig.
2), the generally chordally and axially extending 20. torque-override surfaces 38 of teeth 34 will engage the generally chordally and axially extending torque-override surfaces 48 of teeth 44, exerting a rotating pressure on closure 12. This is the situation when cap 10 is being tightened on the filler neck.
Thus, the instant invention provides a cap in which overtightening is eliminated by the slippage of the second generally chordally and axially extending torque-override surfaces 38, 48 of teeth 34, 44. Upon loosening of the cap, the generally radially and axially extending locking surfaces 30- 36, 46 of teeth 34, 44 engage in a locking relationship in 1~37447 which there is no slippage. The overriding torque required to permit slippage in the cap-advancing direction (counterclockwise in Fig. 2) is determined by the flexibility of pawl fingers 30 and base members 32, and the inclination of the chordally extending surfaces 48.
Referring now to Fig. 1, a fuel tank filler neck 54 has threads 56 which engage threads 58 of the axially inner portion 16 of closure 12. A radially extending wall 60 of closure 12 retains an O-ring gasket 62 adjacent an axially 10. inwardly facing surface of axially outer portion 14 of closure 12. When cap 10 is threaded onto neck 54, gasket 62 seats against flange 64 of neck 54, creating a seal between closure 12 and neck 54. A principal consideration in determining the desirable overriding torque between closure 12 and shell 18 is gasket 62. The overriding torque must be so determined to prevent excessive compression of gasket 62 against flange 64 of neck 54, and resulting damage to gasket 62.
Closure 12 includes a pressure-vacuum vent valve 20. housing 68 which supports a pressure-vacuum vent valve assembly 70. Assembly 70 controls the venting of fuel vapors at a predetermined pressure out of the fuel tank through housing orifice 72 and between closure 12 and shell 18 to the atmosphere. Assembly 70 also controls the venting of air through orifice 72 of housing 68 into the fuel tank when the pressure in the tank decreases to a predetermined level.
Assembly 70 includes pressure-venting disc 74 having an axially inwardly facing circwnferential bead 76 which seats against housing 68 and a central aperture 78. Stem 80 of vacuum venting disc 82 is loosely received within aperture 78 1~374~7 of pressure disc 74. Vacuum disc 82 includes a circumferential valve bead 84 which seats against the axially inward surface of pressure disc 74. A spring 86 is disposed between housing 68 and vacuum disc 82 to maintain vacuum disc 82 in a seating relationship against pressure disc 74. A
spring 90 is disposed between a spring retainer cup 92 and a spring retainer 94 to maintain pressure disc 74 in a seating relationship with housing 68. Cup 92 rests on the axially outward surface of pressure disc 74 and retainer 94 is 10. press-fitted into a recess provided in axially outermost portion 40 of closure 12.
Shell 18 includes a peripheral and axially inwardly extending skirt 100. Skirt 100 is circumscribed by a peripheral groove 102 and a pointed lip 104. Retainer ring 20 includes a radially outer, axially outwardly extending portion 110 and a radially inner, axially outwardly extending portion 112 joined by an axially inner radially extending web portion 114. Portion 112 is provided at its axially outer extent with a surface 116 for supporting axially outer 20. portion 14 of closure 12. As shown in Fig. 2, axially outer portion 14 of closure 12 is provided with fingers 118 separated by spaces 120. Fingers 118 rest upon axially outer surface 112 of retainer ring 20. An axially inwardly projecting spacer ring 121 is formed on the axially inner surface 123 of shell 18. The axially inner end of ring 121 is closely spaced to ring 26 to insure the axial alignment of all of the cap 10 components. Spaces 120 between fingers 118 provide for communication between the atmosphere and pressure-vacuum vent valve assembly 70. Referring again to 30- Fig. 1, a radially inwardly extending flange 122 extends ~37~7 about the inner periphery of the radially outer, axially outwardly extending portion 110 of ring 20. Flange 122 engages lip 104 of skirt 100 in a locking relationship to retain ring 100 on shell 18. Thus, ring 20 acts as a radially inward extension of skirt 100 to hold axially outer portion 14 of closure 12 within shell 18. This structure is described in considerable detail in U.S. Patent 4,091,955.
It may be noted that shell 18, ring 20, pawl ring 26, and closure 12 are all susceptible of manufacture by the 10. molding of high impact plastics. In this regard, it may be appreciated that the retention of flange 122 by lip 104 can be a snap fit if plastics are used.
-
Claims (5)
1. A neck cap, comprising a closure member for rotational application to a neck to close it;
means for sealing said closure member against the neck, said sealing means being subject to damage due to overtightening;
a shell providing a hand grip; and a first and second cooperating means for providing a driving connection between said shell and said closure member in a direction to remove said closure member from the neck, and for providing a torque-limited driving connection between said shell and said closure member in a direction to apply said closure member to the neck to protect said sealing means against overtightening; said first means including a plurality of radially deflectable pawl fingers extending radially from a first generally radially facing wall provided on said shell and then generally concentrically with the first wall and provided with pawl teeth at their ends remote from the first wall, each pawl tooth being provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface; said second means including a plurality of equicentric ratchet teeth extending from a second generally radially facing wall provided on said closure member, each ratchet tooth being provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface, the first surface of each pawl tooth cooperating with the first surface of at least one ratchet tooth to establish the drive connection between said shell and said closure member when said shell is rotated in a direction to remove the cap, and the second surface of each pawl tooth cooperating with the second surface of at least one ratchet tooth to establish the torque-limited drive connection when said shell is rotated in a direction to apply the cap.
means for sealing said closure member against the neck, said sealing means being subject to damage due to overtightening;
a shell providing a hand grip; and a first and second cooperating means for providing a driving connection between said shell and said closure member in a direction to remove said closure member from the neck, and for providing a torque-limited driving connection between said shell and said closure member in a direction to apply said closure member to the neck to protect said sealing means against overtightening; said first means including a plurality of radially deflectable pawl fingers extending radially from a first generally radially facing wall provided on said shell and then generally concentrically with the first wall and provided with pawl teeth at their ends remote from the first wall, each pawl tooth being provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface; said second means including a plurality of equicentric ratchet teeth extending from a second generally radially facing wall provided on said closure member, each ratchet tooth being provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface, the first surface of each pawl tooth cooperating with the first surface of at least one ratchet tooth to establish the drive connection between said shell and said closure member when said shell is rotated in a direction to remove the cap, and the second surface of each pawl tooth cooperating with the second surface of at least one ratchet tooth to establish the torque-limited drive connection when said shell is rotated in a direction to apply the cap.
2. The cap of claim 1 wherein said closure member is threaded.
3. The cap of claim 1 or 2 wherein said sealing means includes a gasket.
4. A fuel tank filler neck cap, comprising a closure member for insertion into a threaded filler neck to close it, a gasket for sealing against the lip formed at the axially outer end of the filler neck, the gasket mounted on the closure member near its axially outer end, a shell member providing a hand grip, the shell member and closure member including cooperating first and second means, respectively, providing a driving connection between the shell and closure in a direction to remove the closure from the filler neck and a torque-limited driving connection between the shell and closure in the direction to advance the closure on the filler neck to protect the gasket against overtightening, the cooperating first means including a plurality of radially deflectable pawl fingers formed on the shell, the pawl fingers extending radially from a first radially facing wall provided on the shell and then generally concentrically with the first wall and provided at their ends remote from the first wall with pawl teeth, each provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface, and the cooperating second means including a second generally radially facing wall on the closure, the second wall providing a plurality of ratchet teeth, each ratchet tooth including a first generally radially and axially extending locking surface cooperating with a first surface of at least one of the pawl teeth to establish the driving connection between the shell and closure in the direction to remove the closure from the neck, each ratchet tooth further including a second generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection between the shell and closure in the closure-advancing direction.
5. A fuel tank filler neck cap, comprising a closure member for turning insertion into the filler neck to close it, a gasket mounted on the closure member for sealing against the lip formed at the axially outer end of the filler neck, a shell member providing a hand grip, the shell member and closure member including cooperating first and second means, respectively, providing a driving connection between the shell and closure in a direction to remove the closure from the filler neck and a torque-limited driving connection between the shell and closure in the direction to advance the closure on the filler neck to protect the gasket against overtightening, the cooperating first means including a plurality of radially deflectable pawl fingers formed on the shell, the pawl fingers extending radially inwardly from a radially inwardly facing surface of the shell and then generally concentrically with the radially inwardly facing surface and provided at their ends remote from the radially inwardly facing surface with pawl teeth, each provided with a first generally radially and axially extending locking surface and a second generally chordally and axially extending torque-override surface, and the cooperating second means including a generally radially outwardly facing surface on the closure, the outwardly facing surface of the closure providing a plurality of ratchet teeth, each ratchet tooth including a first generally radially and axially extending locking surface cooperating with a first surface of at least one of the pawl teeth to establish the driving connection between the shell and closure in the direction to remove the closure from the neck, each ratchet tooth further including a second generally chordally and axially extending torque-override surface cooperating with at least one of the pawl teeth to establish the torque-limited driving connection between the shell and closure in the closure-advancing direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14016680A | 1980-04-14 | 1980-04-14 | |
| US140,166 | 1980-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137447A true CA1137447A (en) | 1982-12-14 |
Family
ID=22490025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000369918A Expired CA1137447A (en) | 1980-04-14 | 1981-02-02 | Threaded gas cap |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1137447A (en) |
-
1981
- 1981-02-02 CA CA000369918A patent/CA1137447A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4091955A (en) | Plastic filler neck cap | |
| CA1070644A (en) | Torque-limiting device | |
| EP0889834B1 (en) | Fuel cap and filler neck firment | |
| US5110003A (en) | Torque-override cap | |
| EP0723516B1 (en) | Delayed actuation fuel cap | |
| US4779755A (en) | Pressure release control fuel cap | |
| US5785196A (en) | Closure for a pressurized container | |
| US4747518A (en) | Squeeze bottle self-closing and venting dispensing valve | |
| US5316163A (en) | Bottle top having inner and outer caps for securing and sealing a resilient stopper | |
| US5881907A (en) | Sealing cap with metal insert for sheet metal containers for corrosive liquids | |
| US5529201A (en) | Cam-on filler neck cap | |
| USRE36959E (en) | Lockable pressure relief fuel cap | |
| EP0660793B1 (en) | Quick-on fuel cap | |
| US4331247A (en) | One piece child-resistant closure | |
| CA1319127C (en) | Fuel cap | |
| EP1005606B1 (en) | Assembly of a coolant container cap assembly and a coolant container | |
| US4136795A (en) | Plastic radiator cap | |
| CA1137447A (en) | Threaded gas cap | |
| CA1074293A (en) | Self-contained radiator cap | |
| WO1981003649A1 (en) | Child resistant container cover | |
| CN111268275B (en) | Pressure reducing cover | |
| JPH06345111A (en) | Closure component and its mounting | |
| JPH0640462A (en) | Tank cap | |
| JP2510168B2 (en) | Fuel tank cap | |
| JPS6330709Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |