US3685728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic mixing faucet
Assignee: Individual
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Filing: 1970-11-04
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Granted: 1972-08-22
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Expires: 1990-11-04
Abstract
Abstract Thermostatic mixing faucet of the type wherein a capsule adapted to expand under the influence of heat and disposed in the mixing chamber is adapted to actuate a cylindrical spool valve controlling the cold water and warm water inlet ports by reacting against a fixed but displaceable bearing member of which the change of position permits of adjusting the temperature of the mixed water. The outlet spout of said faucet is controlled by a second cylindrical spool valve concentric to the first one and of which the axial movements are controlled by means of a handwheel rotatably mounted to the faucet body, the adjustment of the mixed water temperature being controlled by a rotary knob provided at one end of said body and adapted, when rotated, to produce an axial movement of said bearing member engaged by said expansible capsule.
Inventors
- 👤 Yves Chapou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132; G05D23/134; G05D23/1346; G05D23/1353
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
224 words
A thermostatic mixing faucet, comprising a hollow body defining two inlet ports for cold and warm water, respectively, and an outlet spout for mixed water, a hollow fixed socket disposed inside of said hollow body and secured thereto, a first cylindrical spool valve means partially disposed in said socket for controlling the cold and warm water inlet ports of said hollow body, said first spool valve defining therein a mixing chamber for mixing of cold and warm water, a bearing member axially displaceably disposed in said body, an expansible capsule disposed in said mixing chamber and expansible under the influence of heat, said capsule operatively disposed to actuate said spool valve by reacting against said bearing member, said first spool valve having an outlet opening for mixed water, said socket having another opening for mixed water registering with said outlet opening of said first spool valve and with said outlet spout of said hollow body, a second cylindrical spool valve means concentric to said socket and interposed between said socket and said hollow body, controlling communication with said outlet opening of said socket, and a handwheel means rotatably mounted to one end of said body and for actuating said second spool valve means, a rotary knob means provided at said one end of said body for producing an axial movement of said bearing member.
Claim 2
Dependent Claim
224 words
A thermostatic mixing faucet, comprising a hollow body defining two inlet ports for cold and warm water, respectively, and an outlet spout for mixed water, a hollow fixed socket disposed inside of said hollow body and secured thereto, a first cylindrical spool valve means partially disposed in said socket for controlling the cold and warm water inlet ports of said hollow body, said first spool valve defining therein a mixing chamber for mixing of cold and warm water, a bearing member axially displaceably disposed in said body, an expansible capsule disposed in said mixing chamber and expansible under the influence of heat, said capsule operatively disposed to actuate said spool valve by reacting against said bearing member, said first spool valve having an outlet opening for mixed water, said socket having another opening for mixed water registering with said outlet opening of said first spool valve and with said outlet spout of said hollow body, a second cylindrical spool valve means concentric to said socket and interposed between said socket and said hollow body, controlling communication with said outlet opening of said socket, and a handwheel means rotatably mounted to one end of said body and for actuating said second spool valve means, a rotary knob means provided at said one end of said body for producing an axial movement of said bearing member.
Claim 3
Dependent Claim
121 words
The mixing faucet, as set forth in claim 1, further comprising a knob and means for setting said faucet disposed at an end of said socket corresponding to said one end and operatively interrupting one of said inlet ports, said first spool valve means has openings leading into said mixing chamber, said openings being operatively controlled by the position of said first spool valve means, which covers and uncovers one of said inlet ports in said hollow body outside of said socket, and an end of said first spool valve means being open and controlled displaceably relative to a closed end of said socket for determining the quantity of water entering said mixing chamber from the other of said inlet ports.
Claim 4
Dependent Claim
50 words
Mixing faucet according to claim 1, in which the fluid tightness of the outlet spout is obtained by using an O-ring surrounding said fixed socket and held in position by an insert ring provided on said fixed socket, the second output adjusting spool valve being adapted to engage said O-ring.
Claim 5
Dependent Claim
83 words
Mixing faucet according to claim 1 in which said expansible capsule comprises a movable rod adapted to engage said bearing member and said member bears in turns, through the medium of a coil compression spring, against a member adapted to be moved in the axial direction as a consequence of the rotation of the mixed water temperature adjusting knob, said last-named axially movable member being screwed into said fixed socket containing the spool valve for adjusting the cold water and warm water proportions.
Claim 6
Dependent Claim
138 words
Mixing faucet according to claim 4, further comprising a safety system adapted to prevent the untimely delivery of water heated at an abnormally high temperature, this system comprising a control knob slidably mounted in the rotary knob provided for adjusting the temperature, said control knob comprising a slot adapted to receive a stud carried by the member controlling the bearing member engaged by the movable rod of said expansible capsule, a spring constantly urging said knob to a position wherein said slot is not normally aligned with the stud of said member, whereby said stud will abute against said sliding knob in order to prevent the rotation of said temperature adjusting knob in the direction of higher temperatures, unless the operator voluntarily depresses the sliding knob of said safety system, against the force of the thrust spring thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |