CA1309211C - Drain fitting with detented open position - Google Patents
Drain fitting with detented open positionInfo
- Publication number
- CA1309211C CA1309211C CA000499999A CA499999A CA1309211C CA 1309211 C CA1309211 C CA 1309211C CA 000499999 A CA000499999 A CA 000499999A CA 499999 A CA499999 A CA 499999A CA 1309211 C CA1309211 C CA 1309211C
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- stem
- closure
- drain
- open position
- 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 - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K1/00—Wash-stands; Appurtenances therefor
- A47K1/14—Stoppers for wash-basins, baths, sinks, or the like
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/22—Outlet devices mounted in basins, baths, or sinks
Abstract
Drain Fitting with Detented Open Position Abstract of the Disclosure A drain fitting of the type which is opened by grasping and manually raising the closure member has a sleeve attached to the underside of the closure member that is slidable along a stem within the fitting as the closure member is traveled between the open and closed postions. A ball and spring detent acting between the sleeve and stem engages automatically when the closure member is raised to the open position to hold the closure at that position without further motions or effort by the operator.
Description
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~3~2~L1 Drain Fittinq with Detented Open Position Technical Field This invention relates to valves for plumbing installations and more particularly to drain fittings for selectively opening and closing drain passages in bathtubs, wash basins, sinks or the like.
Backqround of the Invelltiorl Many drain fittings for plumbing installations have a cover or closure member which cannot simply be grasped and raised to open the drain. Consequently, mechanical complications are needed to enable opening of the drain~ In some instances, a system of levers and other mechanism is provided to manipulate the closure from a location situated away from the fitting itself.
Other fittings of this generaL type are self contained but require springs or resilient sleeves to urge the closure towards the open position. This makès it necessary to provide some form of releasable latching mechanism to hold the closure at the closed position against the force of the spring.
D*ain fittings of the type having a graspable closure which is raised manually can have a relatively uncomplicated construction and can therefore be less expensive and potentially more durable.
Fittings of this type require some means for maintaining the closure at the open position without continual manual supportO
Such means should not involve substantial complication of the mechanism and should be durable and reliable in order to fully realize the advantages of this type of drain fitting. It is more convenient if such means operates automatically when the closure is raised to the open position without requiring rotation of the closure or other additional movements in order to hold ~ , ~
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the drain fitting in the open position.
Prior drain fittings of the type which are opened by grasping and raisin~ the closure and which do not require additional rotary latching motions rely on friction to hold the closure at the open position. In a typical prior construction of this kind the closure is attached to a sleeve which is coaxlally positioned on a vertical stem within the fitting and which is slidable along the stem to enable movement of the closure between the open and closed postions, A resilient split ring disposed in a coaxial groove on the stem is in a state of radial compression so that it exerts pressure against the inner surface of the sleeve. This increases frictional resistance to movement of the sleeve and clos, ure along the stem causing such elements to tend to remain at any given position until it is manually forced away from that position.
Friction increasing means of the above described kind tend to wear rapidly and thereby become less effective for the intended purpose. Such mechanism does not provide a positive holding action at the open position but acts instead to require increased effort by the operator at all stages of closure movemerlt~ A
more durable fitting construction that does not require such ncreased operator effort and which provides a more positive holding action at the open position would be highly advantageous.
The present invention is directed to overcoming one or more of the problems discussed above.
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Summarv of the Invention In one aspect the present inven~ion provides a drain fitting having a c~lindrical body adapted to be engaged within a drain opening to d0fine a drain flow passage therethroug~, a flow transmissive spider attached to said body and which extends across said flow passage, first and second coaxial members, one of which is a stem secured to said spider and extending therefrom along the axis of said body and the other of which is a sleeve disposed coaxially on said stem and being slidable therealong, said sleeve having an axial passage through which said stem extends, and a closure attached to the upper end of said sleeve and being movable therewith between a closed position at which said closure blocks flow into said drain passage and an open position at which said closure is spaced above said body to admit flow into said drain passage, ; wherein a first of said coaxial members has a radially directed bore extending towards the second of said coaxial members and the second of said coaxial members has a concavity facing said first of said coaxial members, further including a detent element disposed at least partially within said radially directed bore and being movable relative thereto, and means for urgin~ said detent element outwardly from said bore towards said second coaxial member in position to receive a portion of said detent element when said closure and sleeve are at said open position, and wherein said stem has a protuberance which i5 too large to enter said axial passage of said sleeve, said protuberance being located on sald stem to stop further travel of said sleeve and said ~losure when said detent element seats in said concavity.
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In another more specific aspect of the invention, a drain fitting of the type which is opened by grasplnq and manually raising a closure has a cylindrical body defining a drain passage and a spider member which extends into the passage. A stem extends along the axis of the body and has one end secured to the spider member and an enlargement at the opposite end and a tubular sleeve is disposed in coaxial relationship with the stem and is slidable along the stem. A
closure extends radially from the sleeve and is movable with the sleeve between a closed position at which flow into the drain passage is blocked and an open position at which flow may be admitted to the drain passage. The fitting further includes - means for defining a chamber around the enlargement of the stem, the chamber being proportioned to stop further travel of the sleeve and closure when the closure reaches the open position, by abutment of the enlargement against a surface of the chamber. The fitting is further provided with detent means for inhibiting movement of the closure and sleeve towards the spider memher when the clo:ure is at the opeD position.
1311~
The invention provides a simple, durable and more easily operated drain fitting of the type having a closure which is grasped and raised manually to open a drain. The detent engages automatically wherl the closure is raised to the open position without additional motions or effort on the part of the operator~
The mechanism does not significantly increase resistance to travel of the closure when it is away from the open position~
Brief Description of the Drawinqs FIG. 1 is a perspective view of a drain fittirlg in accordance with one embodimen~ o~ the invention shown installed in a ~ypical plumbing installation.
FIG. 2 is an exploded view of the drain fitting of FIG. 1 depicting the internal construction of the fitting.
FIG. 3 is an axial section view of the drain fitting of the preceding figures.
FIG. 4 is an exploded perspective view of a modified construction for certain components of the drain fittiny of the precedirlg figures.
FIG. 5 is an exploded perspective view of a drain fitting in accordance with another embodiment of the invention.
FIG. 6 is an axial section view of the embodiment of the invent~on shown in FIG. 5.
Detailed Description of the Preferred Embodiments Referring initially to FIG. 1 of the drawings, the drain fitting ll of this embodiment is designed for installatiorl in a drain opening 12 at the base 13 of a bathtub, kitchen sink, wash basin or other plumbing appliance in which water or other liquid is to be temporarily retained.
Referring jointly to FIGS. 2 and 3, the fitting 11 includes ;
~3~2~1 a cylindrical body 14 which forms the drain flow passage 16 and which is provided with a flange 17 at the upper end. Body 14 is adapted to be engaged in the drain opening 12, in this example9 by being provided with extexnal threads 18 which may be engaged with internal threading 19 within a drain pipe elbow 21 situated below the base 13 o~ th0 bathtub, wash basinl sink or the like.
An annular resilient gasket 22 is compressed against the rim of the drain opening 16 by flange 17 to prevent leakage when the drain fitting 11 is installed in this manner.
To support the movable closure 23, a spider member 24 extends across drain passage 16 at the base of body 14 and has an internally threaded hub 26 situated at the axis of the body.
A rod shaped stem 27 has a threaded lower end engaged in hub 26 and extends upward from the hub in alignment with tne axis of body 14. The upper end of stem 27 has a radially extending enlargement 28, situated above body 14, for purposes which will be hereinafter described.
Movable closure 23 is an assembly which includes a sleeve member 29 disposed in coaxial relationship with stem 27 and which is slidable along the stem. Sleeve 29, in this embodiment, is integrally formed with a cover member 31 at the upper end of the sleeve that has a diameter greater than the diameter of the drain flow passage 16. An annular elastomeric skirt 32 is disposed on the upper end of sleeve 29 adjacent cover 31 in coaxial relationship with the sleeve and cover to close the drain passage 16 when the closure 23 is moved down to its lowermost position along the stem 27. At this closed position, gravity and the pressuxe of liquid above the fitting 11 urge the rim o~
skirt 32 against flange 17 to provide a sealing action.
To facilitate grasping of the closure 23, a hollow knob 33 is situated above cover 31 and engaged with the cover by threads 3~. Knob 33 has an internal chamber 36 into which the upper end :13~3~321~
of stem 27 extends through a passage 37 in cover 31. Passage 37 is of smaller diameter than the enlargement 28 at the top of stem 27. Thus upward travel of closure 23 along stem 27 is limited by abutment of enlargement 28 against the base of chamber 36 thereby deEining the open position of the drain fitting.
Detent means 38 are provided ~or inhibiting downward movement of the closure 23 from the open position in order to hold the drain fitting 11 open without further manual effort. The detent means 38 of this embodiment of the invention include a helical compression spring 39 and a spherical detent element 41 disposed in a radially directed bore 42 in stem 27. Spring 39 is iJI a state of compression and thus urges the detent element 41 outwardly towards the inner surface of sleeve 29.
A coaxial groove 43 in the inner surface of sleeve 29 defines a concavity which the detent element 41 enters when the closure 23 is at the above described open position. Downward travel of the closure 23 from the open position requires ejection of detent element 41 from groove 43 which in turn requires compression of spring 39. Thus the spring force resists such travel and the closure 23 remains in the open position until it is manually forced downward. The detent means 38 does not significantly resist travel of the closure 23 except at the open position.
The closure 23 does not need to be turned in order to latch ik in the open position but, in the embodiment described above, the closure can rotate relative to stem 27. ReEerring now to FIG. 4, such rotation can be prevented i-f desired by providing a longitudinal slot 44 along the stem 27a and by providing a threaded screw 46 on sleeve 29a that extends a short distance inward from the inner surface o~ the sleeve within the slot~
Preventing rotation of the closure 23 relative to the stem 27 can facilitate assembly and disassembly of the fitting 11 as turning of the closure then engages or disengages the stem at ~3~9Z~
spider hub 26 enabling the closure and stem to be installed and removed as a unitO
Referring now to FIGS. 5 and 6 in conjunction, variations in the drain fitting llb construction are possible including embod-iments in which the spring 39b and ball 4lb elements of the detent means 38b are carried by the sleeve 29b rather than the stem 27b.
The embodiment depicted in FIGS. 5 and 6 has a cylindrical body 14b includir~g à spider 24b with threaded hub 26b which are essentially similar to the corresponding elements of the previously described embodiment and which ~an be mounted at a drain opening 16b in a similar manner. As in the previous instarlce, the stem 27b extends upward from hub 26b along the axis oE the body 14b and has a radially exterlding enlargemellt 28b at the upper end.
The cover member 3lbin this embodiment and the graspable knob 33b are formed as a single intregral element while sleeve 29b, disposed in coaxial relationship with stem 27b, is separable from the cover member. Sleeve 29b is fastened to the cover member 3lb through a threaded annular portion 48 of the cover member that extends down into a threaded opening 49 in the upper end of the sleeve. The inner edge of elastomeric skirt 32b is clamped between the underside of cover member 31b and the upper end of sleeve 29b.
The chamber 36b within portion 48 of the cover member 31b is of larger diameter than the inside diameter of sleeve 29b and extends up into the body of the cover member in order to receive the upper end of stem27b including the stem enlargement 28b.
Thus the drain fitting llb may be opened by grasping knob 33b and pulling the cover member 31b and attached sleeve 29b upward until the motion is stopped, at the open position of the fittirlg, by abutment o~ sleeve 29b agains stem enlargement 28b.
The lower portion of stem 27b is provided with a flat : . .
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sidewall 51. Rotation of the sleeve 29b relative to stem 27b is prevented by a screw 52 engaged in the inner wall of the sleeve that has a flat head which bears against sidewall 51.
The detent means 38bEor holding the drain fitting llb at the open position includes a threaded spring housing 53 engaged in a radially directed bore 54 in sleeve 29b. A helical com-pression spring 39b within housing 53 urges a detent ball 41b against the flat sidewall 51 of stem Z7b~ A concavity 56 in the stem 27b at the upper end of sidewall 51 is positioned to be entered by ball 41b when the cover member 31b and sleeve 29b are traveled to the above described open position.
As in the previously described embodiment, downward movement of the cover member 31b and skirt 32b from the open position is resisted as such movement requires ejection of ball 41b from concavity 56 against the force of spring 39b. It is advantageous if the outer end of spring housing 53 is provided with a screw~
driver slot 57 or the like as this enables adjustment of the degree of compression of spring 39b and thus adjustment of the amount of force that is required to move the cover member 31 downward from the open position.
While the invention has been described with respect to specific preferred embodiments, numerous structural variations are possible and it is not intended to limit the invention except as defined itl the following claims.
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~3~2~L1 Drain Fittinq with Detented Open Position Technical Field This invention relates to valves for plumbing installations and more particularly to drain fittings for selectively opening and closing drain passages in bathtubs, wash basins, sinks or the like.
Backqround of the Invelltiorl Many drain fittings for plumbing installations have a cover or closure member which cannot simply be grasped and raised to open the drain. Consequently, mechanical complications are needed to enable opening of the drain~ In some instances, a system of levers and other mechanism is provided to manipulate the closure from a location situated away from the fitting itself.
Other fittings of this generaL type are self contained but require springs or resilient sleeves to urge the closure towards the open position. This makès it necessary to provide some form of releasable latching mechanism to hold the closure at the closed position against the force of the spring.
D*ain fittings of the type having a graspable closure which is raised manually can have a relatively uncomplicated construction and can therefore be less expensive and potentially more durable.
Fittings of this type require some means for maintaining the closure at the open position without continual manual supportO
Such means should not involve substantial complication of the mechanism and should be durable and reliable in order to fully realize the advantages of this type of drain fitting. It is more convenient if such means operates automatically when the closure is raised to the open position without requiring rotation of the closure or other additional movements in order to hold ~ , ~
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the drain fitting in the open position.
Prior drain fittings of the type which are opened by grasping and raisin~ the closure and which do not require additional rotary latching motions rely on friction to hold the closure at the open position. In a typical prior construction of this kind the closure is attached to a sleeve which is coaxlally positioned on a vertical stem within the fitting and which is slidable along the stem to enable movement of the closure between the open and closed postions, A resilient split ring disposed in a coaxial groove on the stem is in a state of radial compression so that it exerts pressure against the inner surface of the sleeve. This increases frictional resistance to movement of the sleeve and clos, ure along the stem causing such elements to tend to remain at any given position until it is manually forced away from that position.
Friction increasing means of the above described kind tend to wear rapidly and thereby become less effective for the intended purpose. Such mechanism does not provide a positive holding action at the open position but acts instead to require increased effort by the operator at all stages of closure movemerlt~ A
more durable fitting construction that does not require such ncreased operator effort and which provides a more positive holding action at the open position would be highly advantageous.
The present invention is directed to overcoming one or more of the problems discussed above.
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~30~23L~
Summarv of the Invention In one aspect the present inven~ion provides a drain fitting having a c~lindrical body adapted to be engaged within a drain opening to d0fine a drain flow passage therethroug~, a flow transmissive spider attached to said body and which extends across said flow passage, first and second coaxial members, one of which is a stem secured to said spider and extending therefrom along the axis of said body and the other of which is a sleeve disposed coaxially on said stem and being slidable therealong, said sleeve having an axial passage through which said stem extends, and a closure attached to the upper end of said sleeve and being movable therewith between a closed position at which said closure blocks flow into said drain passage and an open position at which said closure is spaced above said body to admit flow into said drain passage, ; wherein a first of said coaxial members has a radially directed bore extending towards the second of said coaxial members and the second of said coaxial members has a concavity facing said first of said coaxial members, further including a detent element disposed at least partially within said radially directed bore and being movable relative thereto, and means for urgin~ said detent element outwardly from said bore towards said second coaxial member in position to receive a portion of said detent element when said closure and sleeve are at said open position, and wherein said stem has a protuberance which i5 too large to enter said axial passage of said sleeve, said protuberance being located on sald stem to stop further travel of said sleeve and said ~losure when said detent element seats in said concavity.
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In another more specific aspect of the invention, a drain fitting of the type which is opened by grasplnq and manually raising a closure has a cylindrical body defining a drain passage and a spider member which extends into the passage. A stem extends along the axis of the body and has one end secured to the spider member and an enlargement at the opposite end and a tubular sleeve is disposed in coaxial relationship with the stem and is slidable along the stem. A
closure extends radially from the sleeve and is movable with the sleeve between a closed position at which flow into the drain passage is blocked and an open position at which flow may be admitted to the drain passage. The fitting further includes - means for defining a chamber around the enlargement of the stem, the chamber being proportioned to stop further travel of the sleeve and closure when the closure reaches the open position, by abutment of the enlargement against a surface of the chamber. The fitting is further provided with detent means for inhibiting movement of the closure and sleeve towards the spider memher when the clo:ure is at the opeD position.
1311~
The invention provides a simple, durable and more easily operated drain fitting of the type having a closure which is grasped and raised manually to open a drain. The detent engages automatically wherl the closure is raised to the open position without additional motions or effort on the part of the operator~
The mechanism does not significantly increase resistance to travel of the closure when it is away from the open position~
Brief Description of the Drawinqs FIG. 1 is a perspective view of a drain fittirlg in accordance with one embodimen~ o~ the invention shown installed in a ~ypical plumbing installation.
FIG. 2 is an exploded view of the drain fitting of FIG. 1 depicting the internal construction of the fitting.
FIG. 3 is an axial section view of the drain fitting of the preceding figures.
FIG. 4 is an exploded perspective view of a modified construction for certain components of the drain fittiny of the precedirlg figures.
FIG. 5 is an exploded perspective view of a drain fitting in accordance with another embodiment of the invention.
FIG. 6 is an axial section view of the embodiment of the invent~on shown in FIG. 5.
Detailed Description of the Preferred Embodiments Referring initially to FIG. 1 of the drawings, the drain fitting ll of this embodiment is designed for installatiorl in a drain opening 12 at the base 13 of a bathtub, kitchen sink, wash basin or other plumbing appliance in which water or other liquid is to be temporarily retained.
Referring jointly to FIGS. 2 and 3, the fitting 11 includes ;
~3~2~1 a cylindrical body 14 which forms the drain flow passage 16 and which is provided with a flange 17 at the upper end. Body 14 is adapted to be engaged in the drain opening 12, in this example9 by being provided with extexnal threads 18 which may be engaged with internal threading 19 within a drain pipe elbow 21 situated below the base 13 o~ th0 bathtub, wash basinl sink or the like.
An annular resilient gasket 22 is compressed against the rim of the drain opening 16 by flange 17 to prevent leakage when the drain fitting 11 is installed in this manner.
To support the movable closure 23, a spider member 24 extends across drain passage 16 at the base of body 14 and has an internally threaded hub 26 situated at the axis of the body.
A rod shaped stem 27 has a threaded lower end engaged in hub 26 and extends upward from the hub in alignment with tne axis of body 14. The upper end of stem 27 has a radially extending enlargement 28, situated above body 14, for purposes which will be hereinafter described.
Movable closure 23 is an assembly which includes a sleeve member 29 disposed in coaxial relationship with stem 27 and which is slidable along the stem. Sleeve 29, in this embodiment, is integrally formed with a cover member 31 at the upper end of the sleeve that has a diameter greater than the diameter of the drain flow passage 16. An annular elastomeric skirt 32 is disposed on the upper end of sleeve 29 adjacent cover 31 in coaxial relationship with the sleeve and cover to close the drain passage 16 when the closure 23 is moved down to its lowermost position along the stem 27. At this closed position, gravity and the pressuxe of liquid above the fitting 11 urge the rim o~
skirt 32 against flange 17 to provide a sealing action.
To facilitate grasping of the closure 23, a hollow knob 33 is situated above cover 31 and engaged with the cover by threads 3~. Knob 33 has an internal chamber 36 into which the upper end :13~3~321~
of stem 27 extends through a passage 37 in cover 31. Passage 37 is of smaller diameter than the enlargement 28 at the top of stem 27. Thus upward travel of closure 23 along stem 27 is limited by abutment of enlargement 28 against the base of chamber 36 thereby deEining the open position of the drain fitting.
Detent means 38 are provided ~or inhibiting downward movement of the closure 23 from the open position in order to hold the drain fitting 11 open without further manual effort. The detent means 38 of this embodiment of the invention include a helical compression spring 39 and a spherical detent element 41 disposed in a radially directed bore 42 in stem 27. Spring 39 is iJI a state of compression and thus urges the detent element 41 outwardly towards the inner surface of sleeve 29.
A coaxial groove 43 in the inner surface of sleeve 29 defines a concavity which the detent element 41 enters when the closure 23 is at the above described open position. Downward travel of the closure 23 from the open position requires ejection of detent element 41 from groove 43 which in turn requires compression of spring 39. Thus the spring force resists such travel and the closure 23 remains in the open position until it is manually forced downward. The detent means 38 does not significantly resist travel of the closure 23 except at the open position.
The closure 23 does not need to be turned in order to latch ik in the open position but, in the embodiment described above, the closure can rotate relative to stem 27. ReEerring now to FIG. 4, such rotation can be prevented i-f desired by providing a longitudinal slot 44 along the stem 27a and by providing a threaded screw 46 on sleeve 29a that extends a short distance inward from the inner surface o~ the sleeve within the slot~
Preventing rotation of the closure 23 relative to the stem 27 can facilitate assembly and disassembly of the fitting 11 as turning of the closure then engages or disengages the stem at ~3~9Z~
spider hub 26 enabling the closure and stem to be installed and removed as a unitO
Referring now to FIGS. 5 and 6 in conjunction, variations in the drain fitting llb construction are possible including embod-iments in which the spring 39b and ball 4lb elements of the detent means 38b are carried by the sleeve 29b rather than the stem 27b.
The embodiment depicted in FIGS. 5 and 6 has a cylindrical body 14b includir~g à spider 24b with threaded hub 26b which are essentially similar to the corresponding elements of the previously described embodiment and which ~an be mounted at a drain opening 16b in a similar manner. As in the previous instarlce, the stem 27b extends upward from hub 26b along the axis oE the body 14b and has a radially exterlding enlargemellt 28b at the upper end.
The cover member 3lbin this embodiment and the graspable knob 33b are formed as a single intregral element while sleeve 29b, disposed in coaxial relationship with stem 27b, is separable from the cover member. Sleeve 29b is fastened to the cover member 3lb through a threaded annular portion 48 of the cover member that extends down into a threaded opening 49 in the upper end of the sleeve. The inner edge of elastomeric skirt 32b is clamped between the underside of cover member 31b and the upper end of sleeve 29b.
The chamber 36b within portion 48 of the cover member 31b is of larger diameter than the inside diameter of sleeve 29b and extends up into the body of the cover member in order to receive the upper end of stem27b including the stem enlargement 28b.
Thus the drain fitting llb may be opened by grasping knob 33b and pulling the cover member 31b and attached sleeve 29b upward until the motion is stopped, at the open position of the fittirlg, by abutment o~ sleeve 29b agains stem enlargement 28b.
The lower portion of stem 27b is provided with a flat : . .
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sidewall 51. Rotation of the sleeve 29b relative to stem 27b is prevented by a screw 52 engaged in the inner wall of the sleeve that has a flat head which bears against sidewall 51.
The detent means 38bEor holding the drain fitting llb at the open position includes a threaded spring housing 53 engaged in a radially directed bore 54 in sleeve 29b. A helical com-pression spring 39b within housing 53 urges a detent ball 41b against the flat sidewall 51 of stem Z7b~ A concavity 56 in the stem 27b at the upper end of sidewall 51 is positioned to be entered by ball 41b when the cover member 31b and sleeve 29b are traveled to the above described open position.
As in the previously described embodiment, downward movement of the cover member 31b and skirt 32b from the open position is resisted as such movement requires ejection of ball 41b from concavity 56 against the force of spring 39b. It is advantageous if the outer end of spring housing 53 is provided with a screw~
driver slot 57 or the like as this enables adjustment of the degree of compression of spring 39b and thus adjustment of the amount of force that is required to move the cover member 31 downward from the open position.
While the invention has been described with respect to specific preferred embodiments, numerous structural variations are possible and it is not intended to limit the invention except as defined itl the following claims.
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Claims (9)
1. A drain fitting having a cylindrical body adapted to be engaged within a drain opening to define a drain flow passage therethrough, a flow transmissive spider attached to said body and which extends across said flow passage, first and second coaxial members, one of which is a stem secured to said spider and extending therefrom along the axis of said body and the other of which is a sleeve disposed coaxially on said stem and being slidable therealong, said sleeve having an axial passage through which said stem extends, and a closure attached to the upper end of said sleeve and being movable therewith between a closed position at which said closure blocks flow into said drain passage and an open position at which said closure is spaced above said body to admit flow into said drain passage, wherein a first of said coaxial members has a radially directed bore extending towards the second of said coaxial members and the second of said coaxial members has a concavity facing said first of said coaxial members, further including a detent element disposed at least partially within said radially directed bore and being movable relative thereto, and means for urging said detent element outwardly from said bore towards said second coaxial member in position to receive a portion of said detent element when said closure and sleeve are at said open position, and wherein said stem has a protuberance which is too large to enter said axial passage of said sleeve, said protuberance being located on said stem to stop further travel of said sleeve and said closure when said detent element seats in said concavity.
2. The drain fitting of claim 1 wherein said detent element is spherical and said means for urging said detent element outwardly is a helical spring disposed in said radially directed bore in a state of compression and having an end which reacts against said spherical detent element.
3. The drain fitting of claim 1 further including means for preventing rotation of said closure and said sleeve relative to said stem and said body.
4. The drain fitting of claim 3 wherein said stem has a longitudinal slot extending along at least a portion of the surface of said stem and wherein said means for preventing rotation of said closure and said sleeve includes a pin carried by said sleeve which extends into said slot.
5. The drain fitting of claim 3 wherein said stem has a flat surface extending along at least a portion of the stem and wherein said means for preventing rotation of said closure and sleeve includes an element carried by said sleeve which has a flat surface abutting said flat surface of said stem.
6. The drain fitting of any one of claims 1 to 5 wherein said radially directed bore is situated in said stem and said concavity is situated in said sleeve.
7. The drain fitting of claim 6 wherein said concavity is a circular groove in the inside surface of said sleeve that is coaxial therewith.
8. The drain fitting of claim 6 further including means for adjusting the degree of compression of said helical spring within said radially directed bore.
9. In a drain fitting of the type which is opened by grasping and manually raising a closure, the combination comprising:
a cylindrical body defining a drain passage and having a spider member extending into said drain passage, a stem extending along the axis of said body and having an end secured to said spider member and having an enlargement at the other end, a tubular sleeve disposed on said stem in coaxial relationship therewith and being slidable therealong, a closure extending radially from said sleeve and being movable therewith between a closed position at which flow into said drain passage is blocked and an open position at which flow may be admitted to said drain passage, means for defining a chamber around said enlargement of said stem, said chamber being proportioned to stop further travel of said sleeve and closure when said closure reaches said open position by abutment of said enlargement against a surface of said chamber, and detent means for inhibiting movement of said closure and sleeve towards said spider member when said closure is at said open position thereof.
a cylindrical body defining a drain passage and having a spider member extending into said drain passage, a stem extending along the axis of said body and having an end secured to said spider member and having an enlargement at the other end, a tubular sleeve disposed on said stem in coaxial relationship therewith and being slidable therealong, a closure extending radially from said sleeve and being movable therewith between a closed position at which flow into said drain passage is blocked and an open position at which flow may be admitted to said drain passage, means for defining a chamber around said enlargement of said stem, said chamber being proportioned to stop further travel of said sleeve and closure when said closure reaches said open position by abutment of said enlargement against a surface of said chamber, and detent means for inhibiting movement of said closure and sleeve towards said spider member when said closure is at said open position thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75658785A | 1985-07-19 | 1985-07-19 | |
| US756,587 | 1985-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1309211C true CA1309211C (en) | 1992-10-27 |
Family
ID=25044147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000499999A Expired - Lifetime CA1309211C (en) | 1985-07-19 | 1986-01-21 | Drain fitting with detented open position |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS6221935A (en) |
| KR (1) | KR870001368A (en) |
| CN (1) | CN86102576A (en) |
| CA (1) | CA1309211C (en) |
| GB (1) | GB2177908B (en) |
| HK (1) | HK102888A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01278456A (en) * | 1988-04-28 | 1989-11-08 | Meidensha Corp | Superconductor and production thereof |
| US4908883A (en) * | 1988-05-18 | 1990-03-20 | Price Pfister, Inc. | Vandal resistant push-pull drain stopper |
| JPH0229962U (en) * | 1988-08-12 | 1990-02-26 | ||
| US5881397A (en) * | 1997-11-12 | 1999-03-16 | Lsp Products Group, Inc. | Drain closure |
| KR20120101185A (en) * | 2009-10-26 | 2012-09-13 | 오시마 고교 가부시키가이샤 | Water saving valve |
-
1986
- 1986-01-07 GB GB08600221A patent/GB2177908B/en not_active Expired
- 1986-01-21 CA CA000499999A patent/CA1309211C/en not_active Expired - Lifetime
- 1986-01-25 KR KR1019860000474A patent/KR870001368A/en not_active Application Discontinuation
- 1986-02-17 JP JP61032676A patent/JPS6221935A/en active Pending
- 1986-04-10 CN CN198686102576A patent/CN86102576A/en active Pending
-
1988
- 1988-12-15 HK HK1028/88A patent/HK102888A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB2177908B (en) | 1988-05-11 |
| GB2177908A (en) | 1987-02-04 |
| CN86102576A (en) | 1987-01-14 |
| HK102888A (en) | 1988-12-23 |
| GB8600221D0 (en) | 1986-02-12 |
| KR870001368A (en) | 1987-03-13 |
| JPS6221935A (en) | 1987-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |