US3916951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot and cold water mixing valve
Assignee: Universal Rundle Corp
•
Filing: 1974-05-23
•
Granted: 1975-11-04
•
Expires: 1994-05-23
Abstract
Abstract A hot and cold water mixing valve having hot and cold water inlet ports controlled by a disc valve located on the inner end of a rotatable stem. The stem also includes an enlarged body portion which, together with a cartridge body forms the mixing chamber. The enlarged portion of the stem is also of considerable axial length which contributes to a good bearing surface for the rotatable stem and precludes tipping of the stem and valve disc.
Inventors
- 👤 William C Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0746; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86815; Y10T137/86823
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
A hot and cold water mixing valve coMprising a cylindrical cartridge body having a bore therein including an inner end wall, said cartridge body also having separate hot and cold water inlet ports extending separately through said body and opening into said bore through said inner end wall, a rotatable stem in said bore and including an operating portion extending from said cartridge and also including a radially enlarged cylindrical portion rotatable in said bore, fluid sealing means including a pair of axially spaced apart O-ring seals between said enlarged cylindrical portion and said bore, said enlarged cylindrical portion being of sufficient axial length so as to accommodate said pair of O-ring seals and provide a good rotatable bearing surface for said stem to prevent tipping of the stem, said stem also including a valve disc at its inner end and which disc abuts against said inner end wall of said bore and is rotatable in respect thereto, said enlarged portion of said stem being axially spaced from said valve disc so as to define a hot and cold water mixing chamber with said bore, said disc having openings which are registerable with said hot and cold water inlet ports of said cartridge body, and a removable threaded cap nut threadably engaged with said stem for holding said rotatable stem captive in said cartridge.
Claim 2
Dependent Claim
224 words
A hot and cold water mixing valve coMprising a cylindrical cartridge body having a bore therein including an inner end wall, said cartridge body also having separate hot and cold water inlet ports extending separately through said body and opening into said bore through said inner end wall, a rotatable stem in said bore and including an operating portion extending from said cartridge and also including a radially enlarged cylindrical portion rotatable in said bore, fluid sealing means including a pair of axially spaced apart O-ring seals between said enlarged cylindrical portion and said bore, said enlarged cylindrical portion being of sufficient axial length so as to accommodate said pair of O-ring seals and provide a good rotatable bearing surface for said stem to prevent tipping of the stem, said stem also including a valve disc at its inner end and which disc abuts against said inner end wall of said bore and is rotatable in respect thereto, said enlarged portion of said stem being axially spaced from said valve disc so as to define a hot and cold water mixing chamber with said bore, said disc having openings which are registerable with said hot and cold water inlet ports of said cartridge body, and a removable threaded cap nut threadably engaged with said stem for holding said rotatable stem captive in said cartridge.
Claim 3
Dependent Claim
57 words
The mixing valve set forth in claim 1 including an adjustable stop fixed to said operating portion of said stem, a cartridge top extending outwardly of said cap nut, and said cartridge top has stop surfaces against which said adjustable stop can abut to limit rotational movement of the stem relative to the cartridge in either direction.
Claim 4
Dependent Claim
38 words
The mixing valve as set forth in claim 1 including a cartridge top extending outwardly of said cap nut, and further characterized in that said cartridge and said cartridge top have interengagable means which prevent relative rotation therebetween.
Claim 5
Dependent Claim
26 words
The mixing valve set forth in claim 2 further characterized in that said cartridge and said cartridge top have interengagable means which prevent relative rotation therebetween.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |