EP1601276B1

EP1601276B1 - Toilet cover assembly

Info

Publication number: EP1601276B1
Application number: EP04717558A
Authority: EP
Inventors: Morten Rathke
Original assignee: Pressalit Group AS
Current assignee: Pressalit Group AS
Priority date: 2003-03-06
Filing date: 2004-03-05
Publication date: 2008-01-09
Anticipated expiration: 2024-03-05
Also published as: DE602004011192T2; ATE383102T1; DK175690B1; WO2004078017A1; EP1601276A1; DK200300348A; DE602004011192D1

Abstract

A toilet cover assembly including a seat (1) and a hinge arrangement including two studs (6) adapted to be mounted mutually spaced on a toilet bowl (3) and two hinge blocks (9) provided with receiving holes (10) for receiving the upper free ends of the studs (6). Each block (9) is provided with a hinge pin (11) forming a first member of a hinge connection between the block (9) and the seat (1). The second member of the hinge connection is formed of a hinge eye (12) being firmly secured to the seat (1). Each stud (6) and hinge connection have co-acting locking means including a circumferential groove (7) on the stud (6) and a locking member (22) displaceably arranged on the block (9) and a cam means (19) provided on the hinge eye (12). The cam means (19) co-acts with the locking member (22) to retain this in locking engagement with the groove (7) of the stud in the lowered position of the seat (1) and to retain the locking member (22) in releasable engagement or out of engagement with the groove (7) in the raised position of the seat (1).

Description

Technical Field

The invention relates to a toilet cover assembly including at least a seat and optionally a cover and a hinge arrangement including two studs adapted to be mounted mutually spaced on a toilet bowl in an upright position and two blocks provided with receiving holes for receiving the studs, said blocks each including a first hinge member of hinge connection provided between the blocks and the seat and comprising a hinge pin member and a hinge eye member, the other hinge member thereof being firmly secured to the seat or the cover, said hinge connections defining an axis of rotation perpendicular to the studs, the hinge members being mutually pivotal about said axis between positions corresponding to the lowered and raised position of the seat. Such a toilet cover assembly is known from document US 4.079.471 .

Background Art

US 6.101 . 640 discloses toilet seat assembly of the above type, wherein the studs are in releasable snap engagement with the receiving holes of the blocks, the snap engagement being provided by means of a spring-loaded ball arranged in the studs and engaging a corresponding radial recess in the receiving hole. For releasing the blocks and thus the toilet seat assembly from the pins, an axially upward releasing force is exerted on the blocks by pulling the toilet seat assembly upwards. In order to ensure that the majority of persons are able to release the toilet seat assembly, the releasing force (required) has to be minimum. However, this involves a risk of the blocks being released from the pins, if a heavy person sits down uncontrolled on the seat or the cover.
Furthermore US 4.367. 567 discloses a toilet cover assembly of the above type provided with a hinge shaft arranged in the blocks and being pivotal by means of an operating handle between a position, in which it locks the blocks to the pins and a release position.

Description of the Invention

The object of the invention is to provide a toilet cover assembly of the above type, in which the blocks are securely locked to the studs in the lowered position of the seat and releasable therefrom without using a separate tool.
The toilet cover assembly according to the invention is characterised in that each stud and hinge connection have co-acting locking means being in mutual locking engagement in a first relative pivot range between the first and the second hinge members (ie a first pivot range of the seat or the cover) to prevent the blocks (and thus the seat or cover) from being detached from the studs, said first pivot range including the pivot position corresponding to the lowered position of the seat or the cover, and in a second relative pivot position or pivot range between the first and second hinge members said locking means being in mutual releasable engagement or disengagement to allow detachment of the blocks (and thus the seat or cover) from the studs, said co-acting locking means being a peripheral groove in said studs and a displaceable locking member arragend in an opening in said blocks.
The mutual locking engagement of the locking means in the first relative pivot range, which includes the pivot position corresponding to the lowered position of the seat, prevents a detachment of the blocks from the studs and thus a removal of the seat in its lowered position, in which position the seat is subjected to the highest load. At the same time the blocks are easily detachable from the studs in the second relative pivot position by exerting an axially upward force on the block in relation to the studs. The studs have an advantageous circular cross-section and are provided with a circumferential groove. As a result it is not necessary to adopt measures for positioning the studs pivotally correctly on the toilet bowl.
According to the invention the co-acting locking means may include a peripheral groove provided in the stud, especially a circumferential groove, a locking member displaceably arranged in an opening provided in the blocks, said opening radially ending in the receiving hole of the blocks, and a cam means arranged on the second hinge member and provided with a cam face having a first cam face portion co- acting with the locking member in the first pivot range of the second hinge member so as to retain the locking member in locking engagement with the groove of the stud and a second cam face portion allowing the locking member to be released from its engagement position in a second pivot position or pivot range of the second hinge member. Preferably, a spring means acting on the locking member in the direction towards its engagement position is provided.
Most preferably, the locking member engages the groove in any pivot position of the second hinge member and an engagement portion of the locking member and the groove of the stud are provided with surfaces co-acting so as to displace the locking member out of its engagement position, when the block is subjected to an axially outward force, whereby the block may be released from the stud in the second pivot position of the second hinge member when subjected to a first outward releasing force. This embodiment of the invention is advantageous in that the block is always secured to the stud by means of a force corresponding to the first releasing force, thus preventing an unintentional detachment of the block from the pin in the release position of the seat. The embodiment is also advantageous in that it provides an audible click as the locking member snaps into engagement with the groove when the block is mounted on the stud, thus ensuring that the block is mounted correctly on the stud.
Furthermore according to the invention the spring means may be firmly secured to the locking member, optionally integrally formed therewith, eg by means of the spring wire.
Moreover according to the invention the cam face of the cam means may have a third pivot position or pivot range of the second hinge member, in which it co-acts with the spring means such that a releasing force in excess of the first releasing force is required to detach the block from the stud. The said third pivot position or pivot range is advantageously chosen adjacent the second pivot position or pivot range.
Consequently the block can still be detached from the stud when the hinge members have not adopted their second relative pivot position, but their third relative pivot position. As a result some security against maloperation of and damage to the toilet cover assembly is obtained, if attempts are made to remove the seat when it is not in the pivot position corresponding to the second relative pivot position.
As regards the arrangement of the said relative pivot positions seen in relation to the position of the seat, these may in principle may chosen freely except for the pivot position corresponding to the lowered position of the seat having to be within the first pivot range. It is, however, preferred that the first pivot range covers the majority of the pivot range between the lowered and raised positions of the seat. It is furthermore preferred that the second pivot range allowing the block to be released from the stud is within a range corresponding to the raised position of the seat, eg the seat being turned 80 to 100' upwards from its lowered position.
Furthermore according to the invention the first hinge member provided on the block may be a hinge pin member and the second hinge member being firmly secured to the seat may be a hinge eye member.
In the presently preferred embodiment of the invention the cam means may be an annular member on the hinge eye member circumscribing the hinge pin and provided with cam faces extending axially in relation to the axis of rotation. This allows for a compact design of the block by placing the axis of rotation such that it intersects the axis of the stud.
Moreover according to the invention the spring means may be a spring washer arranged around the hinge pin and between the locking member and the cam face.
Furthermore according to the invention the spring means may be provided in a diametrically through-going recess in the hinge pin member. Moreover according to the invention the first hinge member provided on the block may be a hinge eye member and the second hinge member being firmly secured to the seat may be a hinge pin member.
In this embodiment of the invention the cam means on the hinge pin member may be provided with cam faces radially extending in relation to the axis of rotation.
According to a particularly simple embodiment of the invention the first hinge member provided on the block is a hinge eye member and the second hinge member being firmly secured to the seat is a hinge pin member, the axis of rotation being arranged such that the hinge pin member intersects the receiving hole of the block and thus the stud tangentially and that in the intersecting area with the receiving hole the hinge pin member and the stud are provided with a recess and a groove, respectively, shaped such that the groove and the non-recessed area of the hinge pin member form the co-acting locking means.

Brief Description of the Drawings

The invention is explained in greater detail below with reference to the accompanying drawings, in which Fig. 1 is a sectional view through the hinge axis of a first embodiment of a toilet cover assembly according to the invention seen in direction towards the front portion of the seat of the cover, respectively.
Fig. 2 is an isometric exploded view of parts of the toilet cover assembly shown in Fig. 1, Fig. 3 shows in a similar view as in Fig. 1 a second embodiment of the toilet cover assembly, the seat and cover being shown in their lowered position. Fig. 4 shows in a similar view as in Fig. 3, the seat and cover being shown in their raised position, Fig. 5 is an isometric exploded view of parts of the toilet cover assembly shown in Figs. 3 and 4, Fig. 6 is an isometric exploded view of parts of a third embodiment of a toilet cover assembly according to the invention, Fig. 7 is a horizontal sectional view through the hinge axis of the toilet cover assembly shown in Fig. 6, the parts thereof being shown in an assembled state, Fig. 8 is a sectional view along the line VIII-VIII in Fig. 7, and wherein the seat and cover are also shown, the seat being in its lowered position, whereas it in Figs. 6 and 7 is shown in its raised position, Fig. 9 is a vertical sectional view through a fourth embodiment of a toilet cover assembly according to the invention, and Fig. 10 is an isometric exploded view of parts of the toilet cover assembly shown in Fig. 9.

Best Modes for Carrying Out the Invention

The toilet cover assembly shown in Figs. 1 and 2 includes a seat 1 and a cover 2 which by means of a hinge arrangement are adapted to be mounted on a toilet bowl 3. The hinge arrangement includes two brackets 4 each being provided with a bracket plate 5 and a bracket stud 6 extending perpendicularly from the bracket plate 5.
The bracket is secured by the bracket plate in a known manner to the toilet bowl 4 by means of a screw/nut connection of which only the screw is shown. The bracket stud 6, which has a circular cross section, is provided with a circumferential groove 7 adjacent its upper end. The bracket stud 6 is provided with a bevelling 8 at its upper end.
For each bracket the hinge arrangement further includes a block 9 with a head 14 provided with a receiving hole 10 for receiving the upper end of the bracket stud 6.
Each block 9 is provided with a hinge pin 11 projecting from the head 14. A seat hinge eye 12 and a cover hinge eye 13 firmly secured to the seat 1 and the cover 2, respectively, are pivotally arranged on each hinge pin 11. In Fig. 2, in which the seat and the cover are not shown, it is indicated that the seat hinge eye 12 and the cover hinge eye 13 are secured to the seat and the cover, respectively, by means of screwing.
A shoulder 15 is provided between the head 14 and hinge pin 11 of the block 9. The end face 16 of the seat hinge eye 12 facing the head 14 is retained in engagement with the shoulder 15 by means of a locking ring 17 arranged in a groove in the hinge pin. A depression 18 is provided in the end face 16. An annular disc 19 is provided in this depression, said disc being firmly secured to the bottom of the depression of the seat hinge eye 12, eg by adhesion. A portion of the disc 19 has been cut away such that a cavity is formed thereby at the bottom of the depression 18. This cavity does not appear from Fig. 1. A spring washer 20 is provided on the annular disc 19.
In the shoulder of the block 9 a bore 21 is provided extending into the receiving hole 10 of the block. A locking pin 22 is displaceably arranged in the bore 21. At a first end 24 the locking pin 22 rests on the spring washer 20 and at a second end 23 the locking pin 22 extends into the circumferential groove 7 of the bracket stud 6.
In the position shown in Fig. 1, where the seat and the cover are lowered, the disc 19 supports the spring washer 20 in the area on which the first end 24 of the pin 22 rests. As a result the second end 23 of the pin 22 is retained in non-releasable engagement with the circumferential groove 7 of the bracket stud 6. When the seat is turned to a position corresponding to its raised position, the cut-away portion of the annular disc 19 is situated opposite the pin 22, as shown in Fig. 2, in which the seat is shown in its raised position. The annular disc 19 does thus not support the spring washer 20. As a result, the spring washer bends outwards and downwards into the cavity formed at the bottom of the depression 18 and the cut-away portion of the annular disc 19. Such a deflection occurs when the seat and thus the blocks 9 are pulled upwards, the second end 23 of the locking pin and/or the groove 7 being rounded such that the pin 22 is subjected to a radially outward force and thus is displaced radially outwardly when the seat is pulled upwards. Correspondingly, the bevelling 8 at the upper end of the stud 6 causes the locking pin to be displaced radially outwards, when the receiving holes of the blocks 9 are receiving the studs. When the receiving holes 10 of the blocks 9 have been correctly positioned on the studs 6, the locking pin 22 again engages the groove 7 by a snap action. The correct engagement is indicated by an audible click.
The annular disc 19 thus forms a cam means, the surface or cam face thereof facing the pin defining a locking position, in which the pin is retained in locking engagement with the groove of the stud, the cut-away portion thereof forming a second cam face, where the pin can be brought out of and into engagement with the groove. The force required for disengaging the locking pin depends on the position of the first end 24 of the pin in the cut-away portion. The force which the spring washer exerts on the pin is thus lowest in the middle of the cut-away portion and increases gradually towards the ends thereof, ie. in the direction towards the cam face of the disc.
Consequently, the force required for pulling the seat upwards to remove the blocks from the studs is also lowest when the pin is positioned in the middle of the cut-away portion and increases gradually towards the cam face of the disc, where a release no longer is possible.
The toilet cover assembly shown in Figs. 3-5 includes a seat 31 and a cover 32 pivotally connected to a toilet bowl 33 by means of a hinge arrangement including two mutually spaced apart brackets 34 each having a bracket plate 35 and a bracket stud 36 projecting vertically from the plate. The bracket studs 36 have a circular cross section and are provided with a circumferential groove 37 adjacent their upper ends and a bevelling 38 at their upper ends.
For each bracket stud 36 the hinge arrangement further includes a block 39 with a block head 44 provided with a receiving hole 40 for receiving the stud 36. A hinge pin 41 projects from the head 44. A shoulder 45 is provided between the head 44 and the hinge pin 41. The hinge pins jointly define the axis of rotation of the hinge arrangement. The hinge pin 41 is provided with a diagonal recess 50 extending parallel to the receiving hole 40. The bottom of the recess is in the same plane as the shoulder 45. An opening 51 extending to the receiving hole 40 is provided in the bottom.
The opening 51 is arranged to be flush with the groove 37, when the receiving hole of the block is arranged on the stud 36. A locking means in form of a locking pin 52 is displaceably received in the opening 51. The locking pin 52 is connected with a L-shaped spring 53 being attached to the bottom of the block at its upper end, as shown by means of the screw 54. An engagement end 55 of the locking pin 52 extends into the receiving hole 40 and thus into the groove 37 of the stud 36 when the stud is received in the receiving hole 40.
A sleeve 46 is pivotally arranged on the hinge pin 41, said sleeve being retained in axial direction between the shoulder 45 and a locking ring 47 engaged in an annular groove 48 in a portion 49 of the hinge pin of a reduced diameter. The locking ring 47 abuts the outer face of an inner annular rib 56 on the sleeve 46. The surface of the rib 56 axially facing the head 44 is shaped as an annular cam face with an axially protruding portion 58 and an axially recessed portion 57. This cam face is not visible in Fig. 5. The protruding cam face portion 58 does, however, appear from Fig. 3, while the recessed cam face portion 57 appears from Fig. 4.
As most clearly shown in Fig. 3 illustrating the seat and the cover in their lowered position, the seat 31 is provided with two aligned and mutually spaced apart receiving openings 42 and 43. In each of these openings 42,43 the sleeve 46 of a block 39 is received non-pivotally, the sleeve 46 being provided with a projection 59 received in a corresponding groove 60 in the openings 42 and 43, respectively. The seat 31 is thus pivotally arranged on the hinge pins 41 via the sleeves 46.
The toilet cover assembly is further provided with rotational dampers for damping the movement of the seat and cover from their raised to their lowered position. The dampers 61,62 each has a shaft 63 of a non-circular cross section and a damper housing provided with a first portion 64 of a circular cross section and a second portion 65, wherein the circular cross section is provided with two opposed plane faces providing the second portion 65 with a non-circular cross section. The shaft 63 of the first damper 61 is non-pivotally received in the diagonal recess 50 of the hinge pin 41 shown on the right-hand side in the figures. The damper housing extends through an opening 66 in the seat 31 having an area of a cross section corresponding to the second non-circular area 65 of the damper housing such that the damper housing is interlocked with the seat 31. The damper housing further extends into a blind hole 67 in the cover 32, said blind hole having a diameter corresponding to that of the dam- per housing. The housing of the first damper thus forms the hinge axis for the cover 32. The damper 61 shown on the right-hand side in Figs. 3 and 4 thus provides a damping of the seat 31, but no damping of the cover 32.
The damper 62 shown on the left-hand side in Figs. 3 and 4 has the same shape as the damper 61. However, its damper shaft is non-pivotally retained in the diagonal recess 50 of the hinge pin 41. The damper housing extends through a through-going opening 68 in the seat 31 of the same diameter as the damper housing, while the second non-rotational-symmetrical portion 65 of the damper housing extends into a blind hole 70 of a corresponding cross section in the cover 32. The damper 62 shown on the left-hand side in Figs. 3 and 4 thus provides a damping of the cover 32, but no damping of the seat 31.
As evident in Fig. 3 showing the seat 31 in its lowered position, the protruding cam face portion 58 of the cam face prevents an outward displacement of the locking pin 52 in the lowered position of the seat, said position corresponding to a first relative pivot position between the sleeve 46 and the hinge pin 41. The engagement end 55 of the hinge pin is thus retained in locking engagement with the groove of the stud 36 in said mutual pivot position. The same also applies to any relative pivot position until a position of the seat 31 close to its raised position, eg a range between 80 to 120° in relation to the lowered position of the seat. In the pivot position corresponding to the raised position of the seat, the recessed cam face portion 57 of the cam face is, however, positioned opposite the inner end 69 of the locking pin 52 (confer Fig. 4) such that the locking pin 52 is axially outwardly displaced in a corresponding manner as explained with reference to the embodiment shown in Figs. 1 and 2, when the seat and thus the block 39 are subjected to an axially upward force in relation to the stud 36. As a result the seat 31 and the cover 32 may be detached from the toilet bowl, when the seat is in a substantially vertical position. As explained above, the locking pin automatically engages the groove 37, when the receiving holes 40 of the blocks are made to re-engage the bracket studs 36.
As indicated in Fig. 8, the third embodiment of a toilet cover assembly according to the invention shown in Figs. 6-8 further includes a seat 71, a cover 72 and two brackets 74, of which only one is shown in the figures, said brackets being adapted to be secured to a toilet bowl. The brackets 74 each have a not-shown bracket plate with a bracket stud 76. As explained above, the bracket stud is provided with a circumferential groove 77 adjacent its upper end and a bevelling 78 at its upper end.
For each bracket stud 76 the hinge arrangement further includes a block 79 with a receiving hole 80 for receiving the stud 76. In contrast to the two embodiments described above, in this embodiment the block is shaped as a hinge eye member provided with a hinge bore 81 extending perpendicular to the receiving hole 80. The hinge bore 81 is offset in such a manner in relation to the receiving hole 80 that its inner periphery 82 is substantially tangent to the inner periphery 83 of the receiving hole 80. In the portion, where the hinge bore 81 is substantially tangent to the inner periphery 83 of the receiving hole 80, the block 79 is provided with an axial groove 84. The said groove 84 thus runs into the receiving hole 80. More specifically, the groove 84 runs into the receiving hole 80 in an area corresponding to the groove 77 of the stud 76, when the stud 76 is received in the receiving hole 80. A spring 85 is provided in the axial groove 84, said spring made of bent spring wire and provided with a rounded end 86 extending into the receiving hole 80 and thus into the groove of the stud 76 when the stud is received in the receiving hole 80. At its other end the spring 85 is provided with two legs 87 inserted in corresponding holes 88 in a shoulder face 89 on the block 79. It should furthermore be noted that the spring does not extend beyond the said shoulder face 89.
Two interspaced hinge pin members 90, of which only one is shown, are connected to the seat 71. As the hinge connection between the hinge eye member or the block 79 and the hinge pin member 90 is symmetrical shaped, only one of the hinge connections will be described below. The hinge pin member 90 is provided with a threaded connecting part 91 by means of which it is firmly secured to the seat 71.
The hinge pin member 90 further has a shoulder forming a transition to a hinge pin 92. The hinge pin 92 has a first portion 93 with a first large diameter and a second portion 94 with a second small diameter. The hinge bore 81 in the block has a bore portion 95 corresponding to the second portion 94, confer Fig. 7. The second portion 94 of the hinge pin 93 projects out of the block 79 and the block is axially retained to the hinge pin member 90 between the shoulder 89 of the hinge pin member and a locking ring 97 arranged in a groove in the projecting second end portion 94 of the hinge pin. An end cap 98 is attached to the projecting hinge pin end.
A cam means is provided between the first and the second portions 93,94 of the hinge pin 92, said cam means being provided with a cam face having a first cam face portion 99 of a diameter corresponding to the first hinge pin portion 93, and a second cam face portion 100 of a diameter corresponding to the second hinge pin portion 94. An inclined edge face 101 is provided between the two cam face portions 99 and 100.
As most evident from Fig. 8 showing the seat 71 in its lowered position, the first cam face portion 99 having a large diameter is positioned immediately opposite the spring 85. The end portion 86 of the spring engaging the groove 77 of the stud 76 is thus prevented from disengaging the groove. As a result, it is not possible to remove the block 79 from the stud and thus the seat 71 from toilet bowl in the lowered position of the seat 71. When positioning the second cam face portion 100 of a small diameter opposite the end portion 86 of the spring 85, the locking end portion 86 of the spring may be disengaged from the groove 77 of the stud 76 by applying an axially upward force to the block 79 in relation to the stud 76. This pivot position of the hinge pin member 90 and thus of the seat is shown in Fig. 7. When the hinge pin member 90 is turned from the locking position shown in Fig. 8 to the release position shown in Fig. 7, the cam face portion provided with the inclined edge face 101 passes over the spring 85. A continuously decreasing portion of the first cam face portion 99 of a large diameter supports the spring 85 when the hinge pin member 90 is turned in the above direction. In other words, the lever arm of the spring between the locking end face 86 of the spring and the point supported by the first cam face portion 99 of a large diameter increases gradually. Consequently, the force to be exerted on the block 79 for detaching it from the stud 76 decreases gradually until the second cam face portion 100 of a small diameter is positioned opposite the spring.
As evident in Fig. 6 and especially in Fig. 8, this embodiment of the invention allows the block 79 to be removed from the stud 76 in substantially any pivot position of the seat 71 except the lowered position thereof. However, by increasing the peripheral extent of the first cam face portion 99 it is possible to reduce the pivot range in which the block and thus the seat can be removed.
It should be noted that the cover 72 is pivotally connected to the hinge pin member 90 by means of a cover hinge eye 102 firmly secured to the seat and pivotally arranged on a cover hinge pin 103 provided on the hinge pin member 90 and extending in opposite direction of the hinge pin 93.
As the three previous embodiments, the embodiment of a toilet cover assembly shown in Figs. 9 and 10 is provided with a seat 111 and a cover 112 and two interspaced brackets 114 adapted to be secured to the toilet bowl 113. Each bracket includes a stud 116 extending upwards from a bracket plate 115. The bracket stud is provided with a circumferential groove 117 adjacent its upper end and a bevelling 118 at its upper end.
As in the third embodiment of the invention, the hinge arrangement further includes a block 119 formed as a hinge eye member and provided with a receiving hole 120 for receiving the stud 116 and a hinge bore 121 arranged perpendicular thereto. The hinge bore 121 intersects the block 119 such that a portion thereof extends through the receiving hole 120 and portion thereof is positioned outside the receiving hole 120. In the shown example the axis of the hinge bore extends substantially tangentially to the periphery of the receiving hole. In the shown example the diameter of the hinge bore further substantially corresponds to the diameter of the circumferential groove 117 on the stud 116. In the mounted state of the block 119 on the stud, the groove is positioned opposite the hinge bore 121.
Two mutually interspaced hinge pin members 122 are secured to the seat 111, only of said members being visible in the figures. Each hinge pin member has a head 123 provided with a threaded fastening means 124 by means of which the hinge pin member 122 is secured to the seat 111. A hinge pin 125 extends axially from the head 123. The hinge pin 125 has an outer diameter corresponding to the hinge bore 121 and extends therethrough. The hinge pin 125 is axially retained to the block by means of a locking ring 126 engaging an annular groove in an end portion of the hinge pin 125 projecting from the hinge bore 121. An cap 128 is attached to the projecting hinge pin end portion. In the area, in which the hinge pin intersects the receiving hole 120, the hinge pin 125 is provided with a recess 129 extending over slightly more than 180°. Put differently, in the said area the hinge pin 125 is shaped as a sector of a circle extending slightly less than 180° when seen in cross-section.
As evident from Fig. 10 showing the hinge pin member 122 in a pivot position in relation to the block 119 corresponding to the raised position of the seat 111, the recess 129 is positioned opposite the receiving hole 120. As a result the hinge block and thus the seat 111 may be removed from stud 116. In any other pivot position, the area 130 of the hinge pin 125 having a cross-section shaped as a sector of a circle, extends into the receiving hole 120 and thus into the groove 117 of the stud when the block 119 is arranged on the stud 116. Consequently the block 119 and thus the seat is secured to the stud 116, when the seat is not in its raised position. In this connection it should be noted that if the area 130 of the hinge pin 125 shaped as a sector of a circle in cross-section extends over a sector of a circle being less than the shown approximately 180°, a larger pivot range is obtained in which the block and thus the seat may be removed from the stud 116. By having the area 130 shaped as a sector of a circle extend over about 45°, it is thus possible to remove the seat 111 from the stud 116 in any position thereof except in its lowered position. In Fig. 9, this option corresponds to removing the portion of the circle-sector-shaped area 130 extending into the groove 117.
Finally it should be noted that the hinge pin members 122 are provided with a cover hinge pin 131 opposite the hinge pin 125. The cover hinge pins 131 are received in corresponding bores in the cover hinge eyes 133 of which only one is shown, said cover hinge eyes 133 being secured to the cover 112, the cover hinge eyes 133 being provided with a threaded fastening means 134 by means of which they are secured to the cover.

Claims

Toilet cover assembly including at least a seat (1; 31 ; 71 ; 111) and optionally a cover (2; 32; 72; 112) and a hinge arrangement including two studs (6; 36; 76; 116) adapted to be mounted mutually spaced on a toilet bowl (3; 33; 113) in an upright position and two blocks (9; 39; 79; 119) provided with receiving holes (10; 40; 80 ; 120) for receiving the studs, said blocks each including a first hinge member of a hinge connection provided between the blocks and the seat and comprising a hinge pin member (11; 41 ; 92; 125) and a hinge eye member (12; 46; 81 ; 121), the other hinge member thereof being firmly secured to the seat or the cover, said hinge connections defining an axis of rotation perpendicular to the studs, the hinge members being mutually pivotable about said axis between positions corresponding to the lowered and raised position of the seat, characterised in that each stud (6; 36; 76 ; 116) and hinge connection have co-acting locking means being in locking mutual engagement in a first relative pivot range between the first and the second hinge members, ie a first pivot range of the seat or the cover, to prevent the blocks (9; 39; 79; 119), and thus the seat cover, from being detached from the studs (6; 36; 76; 116), said first pivot range including the pivot position corresponding to the lowered position of the seat or the cover, and in a second relative pivot position or pivot range between the first and second hinge members said locking means being in mutual releasable engagement or disengagement to allow detachment of the blocks (9; 39 ; 79; 119) and thus the seat cover from the studs (6; 36 ; 76; 116), said co-acting locking means being a perpheral groove (7; 37; 77) in said studs and a displaceable locking member (22; 52; 86) arranged in an opening (21; 51) in said blocks.
Toilet cover assembly according to claim 1, characterised in that the peripheral groove (7; 37; 77) is a circumferential groove, in the stud (6; 36; 76), and the locking member (22; 52; 86) is displaceably arranged in an opening (21; 51) in one of the blocks, said opening radially ending in the receiving holes (9, 39 ; 79) of the blocks, and a cam means (19; 56 ; 99; 100) provided on the second hinge member and having a cam face provided with a first cam face portion (58; 100) co-acting with the locking member (22; 52; 86) in the first pivot range of the second hinge member to retain the locking member in locking engagement with the with optionally a groove (7 : 37 : 77) of the stud, and a second cam face portion in engagement with the groove (7; 37; 77) of the stud, and a second cam face portion (57; 100) allowing the locking member to be released from its engagement position in a second pivot position or pivot range of the second hinge member.
Toilet cover assembly according to claim 2, characterised in a spring means (20; 53; 85) acting on the locking member in the direction towards its engagement position.
Toilet cover assembly according to claim 3, characterised in that the locking member (22; 52; 86) engages the groove (7; 37; 77) in any pivot position of the second hinge member and that an engagement portion of the locking member and the groove of the stud are provided with surfaces co-acting so as to displace the locking member out of its engagement position, when the block is subjected to an axially outward force in relation to the stud, whereby the block is released from the stud in the second pivot position of the second hinge member when subjected to a first outward releasing force.
Toilet cover assembly according to claims 3 or 4 characterised in that the spring means (87) is firmly secured to or formed integrally with the locking member (86).
Toilet cover assembly according to claims 4 or 5, characterised in that in a third pivot position or pivot range of the second hinge member the cam face of the cam means co-acts with the spring means (52; 86) such that a releasing force in excess of the first releasing force is required to detach the block (14; 79) from the stud (6; 76).
Toilet cover assembly according to one or more of the claims 2-6, characterised in that the first hinge member provided on the block (9; 39) is a hinge pin member (11; 41) and the second hinge member firmly secured to the seat is a hinge eye member (12; 46).
Toilet cover assembly according to claim 7, characterised in that the cam means (19; 56) is an annular member on the hinge eye member (12; 46) circumscribing the hinge pin (11; 41) and provided with cam faces extending axially in relation to the axis of rotation.
Toilet cover assembly according to claims 3 and 8, characterised in that the spring means is a spring washer (20) arranged around the hinge pin (11) and between the locking member (22) and the cam face.
Toilet cover assembly according to one or more of the claims 2-6, characterised in that the first hinge member provided on the block (79) is a hinge eye member (81) and the second hinge member firmly secured to the seat (71) is a hinge pin member (92).