US3792812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic mixing cock
Assignee: Individual
•
Filing: 1973-02-06
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Granted: 1974-02-19
•
Expires: 1993-02-06
Abstract
Abstract A thermostatic mixing cock, wherein the passages for the hot and cold water within the body of the cock are mutually spaced in axial direction and, in the mounted cock, they are separated the one another by a tubular ring provided with a sealing gasket seated between said passages, the tubular ring is kept in position by a detachable body portion, and several radial passages serve for allowing the hot and cold water respectively to pass through the tubular ring, to an inner cavity wherein a control member is axially movable under action of a handle and contains a thermostatic control device.
Inventors
- 👤 A Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
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: 12
Claim 1
Independent Claim
369 words
A thermostatic mixing cock comprising: a hollow stationary body portion having inlet unions for hot and cold water; a delivery union for mixed water; a first portion of inner cylindrical cavity; a second coaxial portion of inner cylindrical cavity having a diameter greater thaN the diameter of said first portion of cavity; a communication passage between said delivery union and said first portion of cavity; communication passages between each of said inlet unions and said second portion of cavity, each of said passages being spaced from each other in the axial direction of said first and second portions of cavity; a tubular ring inserted in said second portion of cavity, having an outer sealing gasket seated against said second portion of body cavity in a region thereof intermediate between said passages communicating with said inlet unions for hot and cold water, and having a coaxial inner cylindrical cavity substantially of the same diameter as said first portion of stationary body portion cavity; a hollow disassemblable body portion connected to said stationary body portion, contacting said tubular ring, and having an inner end portion of coaxial inner cylindrical cavity substantially of the same diameter as said first portion of stationary body portion cavity; a first plurality of radial passages between said stationary body portion and said tubular ring; a second plurality of radial passages between said disassemblable body portion and said tubular ring; a control member in the form of a hollow plug housed and axially movable within said first portion of cavity of the stationary body portion, said cavity of said tubular ring and said portion of cavity of the disassemblable body portion forming in their whole a substantially uniform cylindrical cavity; said hollow plug having a substantially cylindrical inner cavity and first and second axially spaced radial passages communicating from said inner cavity of the plug towards the outside, a control valve axially movable within the inner cavity of said plug, said control valve throttling said first and second radial passages of the plug according to its own axial position; and a thermometric bulb housed in said plug cavity in operational relationship with said control valve, said thermometric bulb and control valve thus forming a thermostatic control device.
Claim 2
Dependent Claim
369 words
A thermostatic mixing cock comprising: a hollow stationary body portion having inlet unions for hot and cold water; a delivery union for mixed water; a first portion of inner cylindrical cavity; a second coaxial portion of inner cylindrical cavity having a diameter greater thaN the diameter of said first portion of cavity; a communication passage between said delivery union and said first portion of cavity; communication passages between each of said inlet unions and said second portion of cavity, each of said passages being spaced from each other in the axial direction of said first and second portions of cavity; a tubular ring inserted in said second portion of cavity, having an outer sealing gasket seated against said second portion of body cavity in a region thereof intermediate between said passages communicating with said inlet unions for hot and cold water, and having a coaxial inner cylindrical cavity substantially of the same diameter as said first portion of stationary body portion cavity; a hollow disassemblable body portion connected to said stationary body portion, contacting said tubular ring, and having an inner end portion of coaxial inner cylindrical cavity substantially of the same diameter as said first portion of stationary body portion cavity; a first plurality of radial passages between said stationary body portion and said tubular ring; a second plurality of radial passages between said disassemblable body portion and said tubular ring; a control member in the form of a hollow plug housed and axially movable within said first portion of cavity of the stationary body portion, said cavity of said tubular ring and said portion of cavity of the disassemblable body portion forming in their whole a substantially uniform cylindrical cavity; said hollow plug having a substantially cylindrical inner cavity and first and second axially spaced radial passages communicating from said inner cavity of the plug towards the outside, a control valve axially movable within the inner cavity of said plug, said control valve throttling said first and second radial passages of the plug according to its own axial position; and a thermometric bulb housed in said plug cavity in operational relationship with said control valve, said thermometric bulb and control valve thus forming a thermostatic control device.
Claim 3
Dependent Claim
31 words
A thermostatic mixing cock as set forth in claim 1, wherein said first and second pluralities of radial passages are formed by notches provided on the ends of said tubular ring.
Claim 4
Dependent Claim
21 words
A thermostatic mixing cock as set forth in claim 1, wherein said tubular ring is made of a synthetic plastic material.
Claim 5
Dependent Claim
81 words
A thermostatic mixing cock as set forth in claim 1, wherein said second cavity portion of said stationary body portion has, on the side opposite said first cavity portion, an inner screw thread, and said disassemblable body portion has an outer screw thread complementary to said inner screw thread of the stationary body portion, said tubular ring being axially fixed within said second cavity portion of the stationary body portion upon screwing said disassemblable body portion into said stationary body portion.
Claim 6
Dependent Claim
48 words
A thermostatic mixing cock as set forth in claim 1, wherein said radial passages of the plug are shaped as slots, and further comprising annular sealing gaskets lodged on the outside of said plug between said slots and between each slot and the nearest end of the plug.
Claim 7
Dependent Claim
25 words
A thermostatic mixing cock as set forth in claim 5, wherein said slots expand towards the inside of the plug into recesses forming distribution chambers.
Claim 8
Dependent Claim
71 words
A thermostatic mixing cock as set forth in claim 5, wherein said plug further has outlet slots for delivering the mixed water, and a sealing gasket lodged on the outside of said plug between said outlet slot and the nearest end of the plug; and wherein a bottom wall of said first portion of inner cavity of the stationary body portion has a breather hole for the compensation of the pressures.
Claim 9
Dependent Claim
76 words
A thermostatic mixing cock as set forth in claim 1, wherein said disassemblable body portion has an inner screw thread, and further comprising a threaded piece screwed into said inner screw thread of the disassemblable body portion, connected to said plug and having an operation handle for controlling the axial position of said plug, and a threaded ring also screwed into said inner screw of the disassemblable body portion for preventing accidental disassembling of the cock.
Claim 10
Dependent Claim
67 words
A thermostatic mixing cock as set forth in claim 1, wherein said thermostatic control device comprises said control valve, said thermometric bulb connected to said control valve, a spring operatively inserted between said thermometric bulb and a bottom portion of said plug, and an adjustment screw, screwed into said plug, having an outer operation knob and acting upon an end of said thermometric bulb, opposite said spring.
Claim 11
Dependent Claim
47 words
A thermostatic mixing cock as set forth in claim 9, wherein said adjustment screw has an inner cavity, and a safety spring is housed within said inner cavity of the adjustment screw and is operatively inserted between said adjustment screw and said end of the thermometric bulb.
Claim 12
Dependent Claim
55 words
A thermometric mixing cock as set forth in claim 1, wherein said first and second axially spaced radial passages provided in the plug are somewhat differently admeasured, with the passage for the cold water slightly larger than the one for the hot water, in order to compensate for the thermic inertia of the thermometric bulb.
References Cited (Backward Citations)
US3036777A
Cited
US3388861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |