Patent US3653406A successfully refreshed from Google Patents.
US3653406A
Expired / Lapsed
US
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Brake cylinder pressure retaining valve
Assignee: THETFORD TECHNOLOGIES
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Filing: 1970-03-20
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Granted: 1972-04-04
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Expires: 1990-03-20
Abstract
Abstract This invention relates to a three-position sealed ball-type brake cylinder pressure retaining valve device, for connection to the exhaust passageway of a railway car brake control valve device, having a body provided with a securing flange that has a port therein connecting the external face of the flange to a chamber in the body in which chamber a ball-type valve element is rotatably mounted by a handle movable in a plane parallel to the flange selectively to any one of its three positions. The balltype valve element has a stepped bottomed bore extending inward from its spherical surface, in which bore is a spring-biased check valve. A leaf-type spring interposed between the ball-type valve element and the interior wall surface of the chamber in the body biases this valve element into tight seating contact with a resilient annular exhaust valve seat carried by a removable annular plug disposed in a bore connecting the chamber in the body to the exterior thereof. The ball-type valve element has therein a plurality of angularly spaced passageways and orifices opening at one end at its spherical surface and at the other end either into another passageway also opening at one end at this spherical surface or into the stepped bottom bore. These passageways and orifices, in cooperation with one another and with the check valve, are effective in three respective positions of the ball valve element to selectively provide a fast blow-down of brake cylinder pressure to atmosphere, a slow blow-down to a chosen pressure above atmospheric pressure, and a slow blow-down to atmosphere.
Inventors
- 👤 Francis R Racki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:32
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0605; B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; B60T15/54; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743; Y10T137/86751; Y10T137/87265; Y10T137/87378; Y10T137/87394; Y10T137/87523
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
320 words
A brake cylinder pressure retaining valve device comprising a casing having a chamber therein, an inlet port in communication with said chamber via which fluid under pressure from a brake cylinder is admitted to said chamber, and an outlet port via which fluid under pressure is released to atmosphere, wherein the improvement comprises: a. a removable exhaust valve seat member disposed in said outlet port and having an annular exhaust valve seat, b. a spherical valve element disposed in said chamber and rotatable therein to different rotary positions relative to said exhaust valve seat member, said valve element having a longitudinal stepped bore therein, a plurality of ports of different cross-sectional area certain of which intersect each other and one of which intersects said stepped bore, and a removable annular valve seat carried in said stepped bore, and c. a check valve biased into seated relation on said removable annular valve seat, said spherical valve element having one position in which said inlet port communicates with said outlet port via said chamber, a pair of said intersecting ports in said valve element and said exhaust valve seat to release fluid under pressure to atmosphere at a rapid rate, and being rotatable out of said one position to a first different position in which said inlet port communicates with said outlet port via said longitudinal stepped bore, past said check valve, another of said ports and said exhaust valve seat to release fluid under pressure to atmosphere at a restricted rate down to a chosen low pressure determined by the biasing force seating said check valve, and being rotatable out of said first different position to a second different position in which said inlet port communicates with said outlet port via one of said pairs of ports, a forth one of said plurality of ports, and said exhaust valve seat to release fluid under pressure to atmosphere at a restricted rate.
Claim 2
Dependent Claim
320 words
A brake cylinder pressure retaining valve device comprising a casing having a chamber therein, an inlet port in communication with said chamber via which fluid under pressure from a brake cylinder is admitted to said chamber, and an outlet port via which fluid under pressure is released to atmosphere, wherein the improvement comprises: a. a removable exhaust valve seat member disposed in said outlet port and having an annular exhaust valve seat, b. a spherical valve element disposed in said chamber and rotatable therein to different rotary positions relative to said exhaust valve seat member, said valve element having a longitudinal stepped bore therein, a plurality of ports of different cross-sectional area certain of which intersect each other and one of which intersects said stepped bore, and a removable annular valve seat carried in said stepped bore, and c. a check valve biased into seated relation on said removable annular valve seat, said spherical valve element having one position in which said inlet port communicates with said outlet port via said chamber, a pair of said intersecting ports in said valve element and said exhaust valve seat to release fluid under pressure to atmosphere at a rapid rate, and being rotatable out of said one position to a first different position in which said inlet port communicates with said outlet port via said longitudinal stepped bore, past said check valve, another of said ports and said exhaust valve seat to release fluid under pressure to atmosphere at a restricted rate down to a chosen low pressure determined by the biasing force seating said check valve, and being rotatable out of said first different position to a second different position in which said inlet port communicates with said outlet port via one of said pairs of ports, a forth one of said plurality of ports, and said exhaust valve seat to release fluid under pressure to atmosphere at a restricted rate.
Claim 3
Dependent Claim
61 words
A brake cylinder pressure retaining valve device as recited in claim 1, further characterized in that the axis of said inlet port and the axis of rotation of said spherical valve element are coaxial, and the axis of said annular exhaust valve seat and said axis of rotation of said valve element are at substantially a right angle to each other.
Claim 4
Dependent Claim
72 words
A brake cylinder pressure retaining valve device, as recited in claim 1, further characterized in that said casing is provided with a securing flange having a face at which said inlet port opens and through which said inlet port extends to the chamber in the casing, and with an annular groove extending inwardly from said face of said securing flange in surrounding relation to said inlet port for receiving a sealing member.
Claim 5
Dependent Claim
75 words
A brake cylinder pressure retaining valve device, as recited in claim 1, further characterized in that said exhaust valve seat member comprises: a. an annular member provided intermediate its ends with a peripheral annular groove and at one end with a counterbore, b. an annular seal member disposed in said groove for forming a seal with the wall surface of said outlet port, and c. an annular resilient valve seat removably disposed in said counterbore.
Claim 6
Dependent Claim
28 words
A brake cylinder pressure retaining valve device, as recited in claim 4, further characterized by means yieldingly biasing said spherical valve element against said annular resilient valve seat.
Claim 7
Dependent Claim
38 words
A brake cylinder pressure retaining valve device, as recited in claim 5, further characterized by means carried by said spherical valve element and cooperating with said biasing means to define the different rotary positions of said valve element.
Claim 8
Dependent Claim
97 words
A brake cylinder pressure retaining valve device, as recited in claim 6, further characterized in that said means carried by said spherical valve element comprises a groove formed on the surface thereof, said groove being provided with a plurality of spaced-apart detents therein, and said biasing means comprises a leaf-type spring having intermediate its ends a bend, said spring being so arranged that its ends are anchored in said casing and said bend is disposed in one or another of said detents accordingly as said spherical valve element occupies one or another of its plurality of positions.
Claim 9
Dependent Claim
91 words
A brake cylinder pressure retaining valve device, as recited in claim 7, further characterized in that the configuration of said leaf-type spring comprises two legs the intersection of which forms a first V for engagement with one of said detents, and each of said legs is bent to form a V that is reversely arranged with respect to said first V, one leg of each of said second V''s constituting one leg of said first V and the other leg of each of said second V''s being anchored in said casing.
Claim 10
Dependent Claim
63 words
A brake cylinder pressure retaining valve device, as recited in claim 4, further characterized in that each of said ports opens at the spherical surface of said spherical valve element, and the location at which said ports open are so arranged that at least one thereof opens within said annular resilient valve seat in each of said positions of said spherical valve element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |