IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0881538
(1997-06-24)
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발명자
/ 주소 |
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인용정보 |
피인용 횟수 :
9 인용 특허 :
17 |
초록
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A freezeless faucet has a body, a nozzle, and a shaft that expands and contracts thermally, moving a resilient plug. The plug has an orifice through it and a beveled surface closing and sealing against a seat beveled surface to stop water flow. Further closing force against the beveled surfaces caus
A freezeless faucet has a body, a nozzle, and a shaft that expands and contracts thermally, moving a resilient plug. The plug has an orifice through it and a beveled surface closing and sealing against a seat beveled surface to stop water flow. Further closing force against the beveled surfaces causes the plug to compress radially inward, closing the orifice. A drop in temperature below freezing will cause the shaft to contract, reducing the plug radial compression, allowing the orifice to open and water to drip through. This prevents upstream piping from freezing. An air vent valve selectively admits air into the faucet body to allow draining of water from the body and nozzle, and to prevent siphoning of contaminants into the water supply. A shaft handwheel includes a heat sink, to shorten the thermal response time of the shaft to rapid temperature changes.
대표청구항
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[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A freezeless faucet, for use in connection with a water supply, the faucet comprising:(a) a body extending between a first end connected to the water supply and an opposite second
[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A freezeless faucet, for use in connection with a water supply, the faucet comprising:(a) a body extending between a first end connected to the water supply and an opposite second end, the body having a bore therethrough, the body having a nozzle intermediate the first and second ends, the nozzle communicating with the bore for discharging water, the bore having an annular bore seat intermediate the nozzle and the first end, the bore seat having a beveled surface facing the body second end;(b) a plug disposed within the bore, the plug being resilient, the plug having an orifice therethrough communicating with the bore, the plug having an outer periphery with a beveled surface, the plug being movable from a closed position in which the plug beveled surface is juxtaposed sealingly against the bore seat beveled surface, to an open position in which the plug beveled surface is apart from the bore seat beveled surface;(c) a shaft threadingly mounted generally collinearly within the bore, the shaft extending between a first end connected to the plug and an opposite second end extending beyond the body second end; and(d) a handwheel attached to the shaft second end for rotation therewith; so that(e) as the handwheel is rotated in a first direction, the shaft moves the plug into the closed position to stop water flowing past the bore seat and around the plug periphery, the beveled surfaces cause the plug to compress radially inward, closing the orifice to stop water flowing therethrough, and as the handwheel is rotated in an opposite second direction, the shaft moves the plug into the open position to allow water to flow past the bore seat, around the plug periphery, and toward the nozzle, the plug radial compression is relieved, allowing the orifice to open and water to flow therethrough, and with the plug in the closed position, a decrease in ambient temperature generally below freezing will cause the shaft to contract, thereby reducing the plug radial compression, allowing the orifice to open sufficiently for water to drip therethrough, preventing upstream piping from freezing.
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