1. A lavatory pan washing apparatus comprising:
water supply means that supplies washing water into a rim in a one-way supply manner so that a whirling flow is formed in a lavatory bowl of a lavatory pan, the rim being provided along an upper inner periphery of the lavatory bowl;
an air inlet pipe connected to a water discharge channel continuing to a downstream side of a water sealing portion of the lavatory pan;
air sucking means that sucks air through the air inlet pipe from the water discharge channel; and
control means that is configured to activate the water supply means at a time of washing of the lavatory pan so that the washing water is supplied through the lavatory bowl into the water sealing portion, the control means being further configured to start activation of the air sucking means after a water level in the lavatory bowl has risen so that air is sucked through the air inlet pipe from the water discharge channel, the control means being further configured to deactivate the water supply means after air has flowed through the air inlet pipe into the water discharge channel.
2. The lavatory pan washing apparatus according to claim 1, wherein the control means is configured to activate the air sucking means 3 to 20 seconds after having activated the water supply means.
3. The lavatory pan washing apparatus according to claim 2, wherein the air inlet pipe is provided with a back-flow prevention device which prevents back-flow of the sewage.
4. The lavatory pan washing apparatus according to claim 2, wherein the air sucking means includes:
an ejector configured to generate a negative pressure by the washing water passed therethrough; and
a tank configured to accumulate a negative pressure generated by the ejector by sucking air therein,
wherein the air inlet pipe communicates the tank with the water discharge channel and has a valve opened and closed by the control means.
5. The lavatory pan washing apparatus according to claim 1, wherein the water discharge channel is provided with a retaining portion to retain the washing water and eliminating or reducing a communicating area, and the air sucking means sucks air from a portion between the water sealing portion and the retaining portion.
6. The lavatory pan washing apparatus according to claim 5, wherein the air inlet pipe is provided with a back-flow prevention device which prevents back-flow of the sewage.
7. The lavatory pan washing apparatus according to claim 5, wherein the air sucking means includes:
an ejector configured to generate a negative pressure by the washing water passed therethrough; and
a tank configured to accumulate a negative pressure generated by the ejector by sucking air therein,
wherein the air inlet pipe communicates the tank with the water discharge channel and has a valve opened and closed by the control means.
8. The lavatory pan washing apparatus according to claim 1, wherein the air sucking means includes:
an ejector configured to generate a negative pressure by the washing water passed therethrough; and
a tank configured to accumulate a negative pressure generated by the ejector by sucking air therein,
wherein the air inlet pipe communicates the tank with the water discharge channel and has a valve opened and closed by the control means.
9. The lavatory pan washing apparatus according to claim 1, wherein the air inlet pipe is provided with a back-flow prevention device which prevents back-flow of the sewage.
10. A lavatory pan washing method comprising:
supplying washing water to a lavatory bowl of a lavatory pan; and
sucking air from a water discharge channel connected to a downstream side of a water sealing portion of the lavatory pan,
wherein supply of the washing water to the water sealing portion via the lavatory bowl is started first, and the air is sucked from the water discharge channel after having raised the water level in the lavatory bowl.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-44. (canceled)
45. A toric contact lens design comprising a central optical zone, a vertical meridian, a transition zone surrounding said central optical zone, a carrier extending from said transition zone outward and three thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein said thickness zones are symmetrical across the vertical meridian on the sides of said lens design, wherein the slope of the thickness profile of the second zone is a linear function, wherein the thickness profile is measured along angular meridians.
46. The design of claim 45, wherein the boundary between the first zone and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
47. The design of claim 45, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
48. The design of claim 45, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
49. The design of claim 45, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
50. The design of claim 45, wherein a thickness range from the upper boundary to the lower boundary of the second zone is between about 0.065 mm to about 0.45 mm.
51. The lens created by claim 45.
52. The design of claim 45, further comprising a second transition zone at the edge of the lens.
53. A toric contact lens design comprising a central optical zone, a vertical meridian, a transition zone surrounding said central optical zone, a carrier extending from said transition zone outward and three thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein said thickness zones are symmetrical across the vertical meridian on the sides of said lens design, wherein the slope of the thickness profile of the second zone gradually increases and subsequently decreases from the upper boundary to the lower boundary, wherein the thickness profile is measured along angular meridians.
54. The design of claim 53, wherein the boundary between the first zone and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
55. The design of claim 53, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
56. The design of claim 53, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
57. The design of claim 53, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
58. The design of claim 53, wherein a thickness range from the upper boundary to the lower boundary of the second zone is between about 0.065 mm to about 0.45 mm.
59. The lens created by claim 53.
60. The design of claim 53, further comprising a second transition zone at the edge of the lens.
61. A toric contact lens design comprising a central optical zone, a vertical meridian, a transition zone surrounding said central optical zone, a carrier extending from said transition zone outward and a plurality of thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein said thickness zones are symmetrical across the vertical meridian on the sides of said lens design, wherein width of a relatively consistent thickness is at least 30% of the zone width, wherein the thickness profile is measured along angular meridians.
62. The design of claim 61, wherein said plurality of said thickness zones further comprises three thickness zones.
63. The design of claim 62, wherein the boundary between the first zone and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
64. The design of claim 62, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
65. The design of claim 62, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
66. The design of claim 61, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
67. The design of claim 62, wherein a thickness range from the upper boundary to the lower boundary of the second zone is between about 0.065 mm to about 0.45 mm.
68. The lens created by claim 61.
69. The design of claim 61, further comprising a second transition zone at the edge of the lens.
70. A toric contact lens design comprising a central optical zone, a carrier extending from said central optical zone outward and three thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein the slope of the thickness profile of the second zone is a linear function, wherein the thickness profile is measured along angular meridians.
71. The design of claim 70, wherein the boundary between the first and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
72. The design of claim 70, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
73. The design of claim 70, wherein a thickness range from the upper boundary to the lower boundary of the second zone is about 0.065 mm to about 0.45 mm.
74. The design of claim 70, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
75. The design of claim 70, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
76. The lens created by claim 70.
77. The design of claim 70, further comprising a transition zone at the edge of the lens.
78. A toric contact lens design comprising a central optical zone, a carrier extending from said central optical zone outward and three thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein the slope of the thickness profile of the second zone gradually increases and subsequently decreases from the upper boundary to the lower boundary, wherein the thickness profile is measured along angular meridians.
79. The design of claim 78, wherein the boundary between the first and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
80. The design of claim 78, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
81. The design of claim 78, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
82. The design of claim 78, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
83. The design of claim 78, wherein a thickness range from the upper boundary to the lower boundary of the second zone is about 0.065 mm to about 0.45 mm.
84. The lens created by claim 78.
85. The design of claim 78, further comprising a transition zone at the edge of the lens.
86. A toric contact lens design comprising a central optical zone, a carrier extending from said central optical zone outward and a plurality of thickness zones in said carrier, wherein the thickness zones are designed to achieve rotational stability, wherein width of a relatively consistent thickness is at least 30% of the zone width, wherein the thickness profile is measured along angular meridians.
87. The design of claim 86, wherein said plurality of said thickness zones further comprises three thickness zones.
88. The design of claim 87, wherein the boundary between the first zone and second zone is between about 15 degrees from the vertical meridian and about 45 degrees from the vertical meridian.
89. The design of claim 87, wherein the boundary between the third zone and second zone is between about 30 degrees from the vertical meridian and about 60 degrees from the vertical meridian.
90. The design of claim 87, wherein there is a relatively consistent thickness section at each angular meridian in zones one and two.
91. The design of claim 87, wherein a thickness change is equal or less than 10% of the maximum thickness at the meridian.
92. The design of claim 87, wherein a thickness range from the upper boundary to the lower boundary of the second zone is between about 0.065 mm to about 0.45 mm.
93. The lens created by claim 86.
94. The design of claim 86, further comprising a second transition zone at the edge of the lens.