Drop head structure

• US 5,662,138 A
• Filed: 06/12/1996
• Issued: 09/02/1997
• Est. Priority Date: 06/12/1996
• Status: Expired due to Fees

• Current Assignee: Wen-Hsing Wang
• Original Assignee: Wen-Hsing Wang
• Inventors: Wang, Wen-Hsing
• Primary Examiner(s): Walton, George L.
• Application Number:
  US08/661,914
• Time in Patent Office: 447 Days
• Field of Search: 4/286, 4/287, 4/295, 4/682, 4/688, 137/218, 137/315, 137/433, 137/449, 137/454.2, 137/511, 137/533.13, 137/533.15, 137/519.5
• US Class Current: 137/433
• CPC Class Codes: E03F 5/042 Arrangements of means against overflow of water, backing-up from the drain
• CPC Class Codes: Y10T 137/6004 Assembling or disassembling float or float valve
• CPC Class Codes: Y10T 137/6035 Rotary ball valve
• CPC Class Codes: Y10T 137/7436 Float rigid with valve
• CPC Class Codes: Y10T 137/7488 Ball valves
• CPC Class Codes: Y10T 137/7873 Ball valves
• CPC Class Codes: Y10T 137/7911 Removable cage
• CPC Class Codes: Y10T 137/7912 Separable seat

Abstract

The present invention relates to a water drop structure which not only functions as a water drop but also prevents pests from intruding indoors, smell from leaking indoors, and sewage back flow when the robe is clogged. It has a main body, main drum, control floating ball, upper partition, and an upper cover. The main body has a positioning flange, main through hole, let-in sheet to form a let-in slot, and a main drum having a lower through hole, union sheet, and upper partition having a spacer with a recess, upper through hole, and its peripheral having union sheet, the upper cover having water drop hole, and the bottom having extension hood with inside diameter smaller than that of upper partition. The main drum and upper partition may be set in the main drum, and an upper cover can be assembled in the upper partition. The control floating ball is located between the main drum and upper partition, and extension hood and upper partition recess to form a flow passage for sewage flow, and with the function of control floating ball it may seal the lower through hole when there is no water drop to prevent entry of pests and smell. The control floating ball shall float up owing to water when the tube is clogged, and therefore seal the upper through hole for preventing water back flow.

Claims

1. A water drop structure comprising:

a main body having a main through hole in a center, a positioning flange located on an inner edge and a U-shaped flange forming as opening;

a main drum extending through the main hole, the main drum having a lower through hole on a bottom, and a peripheral portion of a top end having an inverted U-shaped flange engaging the U-shaped flange;

a floatable control floating ball located in the main drum having a diameter greater than that of the lower through hole of the main drum;

an upper partition having a spacer with a recess, the spacer having a partition spaced from the recess for engaging said U-shaped flange and a center having an upper through hole; and

,

an upper cover having a plurality of drop holes, extending over the upper partition and having a curved extension hood extending from a bottom thereof, the extension hood having a diameter greater than the upper though hole of the upper partition and smaller than an inside diameter of the upper partition so as to form a curved flow passage with the recess of the spacer wherein the control floating ball blocks the lower through hole of the main drum when no water passes through the structure and the floating ball blocks the upper through hole of the upper partition when fluid flows into the main drum through the lower through hole to prevent a fluid flow back-up due to a clogged condition;

from passing through the curved flow passage, wherein the peripheral portion of the drum, a peripheral portion of the positioning flange, the inverted U-shaped flange, the U-shaped flange and an outer portion peripheral portion of the cover cooperates with one another to secure these elements to the inner edge of the main body.

2. A water drop structure comprising:

a) a main drum having a main through hole in a bottom, a water level control hole through a side wall and a plurality of guide seats having a plurality of fluid flow notches communicating with the main through hole;

b) a water storage cap positioned on the guide seats within the main drum and having an open upper end;

c) an upper cover mounted on the main drum having an extension drum extending therefrom, the extension drum having an open end portion extending into the water storage cup so as to form a a water flow gap between the water storage cup and the extension drum; and

p1 d) a floatable control floating ball located in the water storage cup so as to block the open end of the extension drum against a water backflow therein when the water level in the water storage cup reaches a predetermined level to prevent the water backflow from passing through the extension drum, thereby allowing the water backflow within the water storage cup to exit through the fluid flow gap and back into the main drum and out the water level control hole, and permitting the water back flow entering from the main through hole into the main drum to be discharged from the main drum through the plurality of water flow notches and out the water level control hole.