US3716276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick service valve device
Assignee: Trane US Inc
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Filing: 1971-10-27
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Granted: 1973-02-13
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Expires: 1991-10-27
Abstract
Abstract This invention relates to a continual quick service valve device operative sequentially with each successive brake pipe pressure reduction over the entire service application range of brake pipe pressure reductions to effect ''''quick service'''' transmission through a train brake pipe of a pressure reduction wave. Fluid under pressure heretofore released from the quick action chamber of a conventional brake control valve device to atmosphere upon effecting a service reduction of brake pipe pressure is supplied to one side of an abutment to cause it to open a quick service valve that establishes a communication between the train brake pipe and a quick service volume. This abutment also constitutes a snap-acting valve for controlling flow between the quick service volume and atmosphere and simultaneously effecting a change in its effective area. Consequently, so long as the one side of this abutment is subject to fluid under pressure released from the quick action chamber, it successively deflects in opposite directions to operate the quick service valve for controlling flow from the train brake pipe to the quick service volume and simultaneously, acting as a valve, repeatedly first cuts off flow from the quick service volume to atmosphere and thereafter releases to atmosphere the fluid under pressure supplied to this volume from the train brake pipe. Means are provided for constantly releasing to atmosphere at a restricted rate the fluid under pressure supplied to the one side of the abutment so that upon movement of the brake control valve device from its service to its lap position, the repeated operations of the continual quick service valve device are terminated. However, upon any subsequent movement of the brake control valve device from its lap position to its service position in response to a manually effected further reduction of brake pipe pressure, this continual quick service valve device will operate in the manner described above to repeatedly first vent fluid under pressure from the brake pipe to the quick service volume and thereafter release this fluid under pressure from this volume to atmosphere until the brake control valve device returns to its lap position.
Inventors
- 👤 R Wilson
- 👤 D Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:32
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/18; B60T15/24; B60T15/30; B60T15/302
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
225 words
In a fluid pressure brake equipment, the combination of a brake pipe, an auxiliary reservoir, and a brake control valve device having a quick action chamber, a triple valve mechanism subject to the opposing pressures of the brake pipe and auxiliary reservoir and operative to effect service applications and releases of the brakes, an emergency valve mechanism subject to the opposing pressures of the brake pipe and quick action chamber and operative to effect emergency applications and release of the brakes, and means operatiVe upon effecting a service brake application to release fluid under pressure from the quick action chamber and a continual quick service valve device comprising: a. a quick service volume, b. a first valve means for controlling flow of fluid under pressure from the brake pipe to said quick service volume, c. a second valve means for controlling flow of fluid under pressure from said quick service volume to atmosphere, and wherein the improvement comprises: d. a movable abutment subject to the opposing pressures of the fluid under pressure released from the quick action chamber and that in said quick service volume, and so constructed and connected to said first and second valve means as to cause successive sequential operation thereof so long as one side of said abutment is subject to said fluid under pressure released from said quick action chamber.
Claim 2
Dependent Claim
225 words
In a fluid pressure brake equipment, the combination of a brake pipe, an auxiliary reservoir, and a brake control valve device having a quick action chamber, a triple valve mechanism subject to the opposing pressures of the brake pipe and auxiliary reservoir and operative to effect service applications and releases of the brakes, an emergency valve mechanism subject to the opposing pressures of the brake pipe and quick action chamber and operative to effect emergency applications and release of the brakes, and means operatiVe upon effecting a service brake application to release fluid under pressure from the quick action chamber and a continual quick service valve device comprising: a. a quick service volume, b. a first valve means for controlling flow of fluid under pressure from the brake pipe to said quick service volume, c. a second valve means for controlling flow of fluid under pressure from said quick service volume to atmosphere, and wherein the improvement comprises: d. a movable abutment subject to the opposing pressures of the fluid under pressure released from the quick action chamber and that in said quick service volume, and so constructed and connected to said first and second valve means as to cause successive sequential operation thereof so long as one side of said abutment is subject to said fluid under pressure released from said quick action chamber.
Claim 3
Dependent Claim
225 words
In a fluid pressure brake equipment, the combination of a brake pipe, an auxiliary reservoir, and a brake control valve device having a quick action chamber, a triple valve mechanism subject to the opposing pressures of the brake pipe and auxiliary reservoir and operative to effect service applications and releases of the brakes, an emergency valve mechanism subject to the opposing pressures of the brake pipe and quick action chamber and operative to effect emergency applications and release of the brakes, and means operatiVe upon effecting a service brake application to release fluid under pressure from the quick action chamber and a continual quick service valve device comprising: a. a quick service volume, b. a first valve means for controlling flow of fluid under pressure from the brake pipe to said quick service volume, c. a second valve means for controlling flow of fluid under pressure from said quick service volume to atmosphere, and wherein the improvement comprises: d. a movable abutment subject to the opposing pressures of the fluid under pressure released from the quick action chamber and that in said quick service volume, and so constructed and connected to said first and second valve means as to cause successive sequential operation thereof so long as one side of said abutment is subject to said fluid under pressure released from said quick action chamber.
Claim 4
Dependent Claim
225 words
In a fluid pressure brake equipment, the combination of a brake pipe, an auxiliary reservoir, and a brake control valve device having a quick action chamber, a triple valve mechanism subject to the opposing pressures of the brake pipe and auxiliary reservoir and operative to effect service applications and releases of the brakes, an emergency valve mechanism subject to the opposing pressures of the brake pipe and quick action chamber and operative to effect emergency applications and release of the brakes, and means operatiVe upon effecting a service brake application to release fluid under pressure from the quick action chamber and a continual quick service valve device comprising: a. a quick service volume, b. a first valve means for controlling flow of fluid under pressure from the brake pipe to said quick service volume, c. a second valve means for controlling flow of fluid under pressure from said quick service volume to atmosphere, and wherein the improvement comprises: d. a movable abutment subject to the opposing pressures of the fluid under pressure released from the quick action chamber and that in said quick service volume, and so constructed and connected to said first and second valve means as to cause successive sequential operation thereof so long as one side of said abutment is subject to said fluid under pressure released from said quick action chamber.
Claim 5
Dependent Claim
77 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means includes a spool-type valve provided with a longitudinally arranged peripheral annular groove which carries an O-ring seal which, upon movement of said valve means to a position in which a communication is established between the brake pipe and said quick service volume, is movable by fluid under pressure from one end of said groove to the other end.
Claim 6
Dependent Claim
122 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means includes a spool-type valve provided with a longitudinally arranged peripheral annular groove that carries therein an O-ring seal which, upon movement of said valve means to a position in which a communication is established between the brake pipe and said quick service volume, is movable by fluid under pressure from one end of said groove to the other end, and which, upon subsequent movement of said valve means to a position in which said communication between the brake pipe and said quick service volume is closed, is movable by fluid under pressure from said other end of said groove to said one end.
Claim 7
Dependent Claim
82 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means includes a cylindrical valve member, and that a lost-motion connection is provided between said movable abutment and said cylindrical valve member to render said cylindrical valve member operative by said movable abutment to establish a communication between the brake pipe and said quick service volume after said second valve means is operated thereby to close communication between said quick service volume and atmosphere.
Claim 8
Dependent Claim
132 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means includes a cylindrical valve member that carries a pair of spaced-apart seals, and that a lost-motion connection is provided between said movable abutment and said cylindrical valve member to render said cylindrical valve member operative by said movable abutment to establish a communication between the brake pipe and said quick service volume after said second valve means is operated thereby to close communication between said quick service volume and atmosphere, and to render said cylindrical valve member operative by said movable abutment to close communication between the brake pipe and said quick service volume after said second valve means is operated thereby to establish a communication between said quick service volume and atmosphere.
Claim 9
Dependent Claim
94 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means comprises: a. an annular valve seat, b. a flat disc valve, c. biasing means for normally biasing said disc valve into seating contact with said annular valve seat, and d. a valve operating stem having one end abutting said movable abutment, the other end being so disposed within said annular valve seat as to effect unseating of said disc valve from said seat upon movement of said movable abutmEnt in one direction a chosen amount.
Claim 10
Dependent Claim
123 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means comprises: a. an annular valve seat, b. a flat disc valve, c. biasing means for normally biasing said disc valve into seating contact with said annular valve seat, and d. a valve operating stem having one end abutting said abutment, the other end being so disposed within said annular valve seat and at such a distance below said flat disc valve while seated on said seat as to effect unseating of said disc valve from said seat upon movement of said movable abutment in one direction before said second valve means is operated thereby to close communication between said quick service volume and atmosphere.
Claim 11
Dependent Claim
172 words
A continual quick service valve device, as recited in claim 1, further characterized in that said first valve means comprises: a. an annular valve seat, b. a flat disc valve, c. biasing means for normally biasing said disc valve into seating contact with said annular valve seat, and d. a valve operating stem having one end abutting said abutment, the other end being so disposed within said annular valve seat and at such a distance below said flat disc valve while seated on said seat as to effect unseating of said disc valve from said seat as to effect unseating of said disc valve from said seat upon movement of said abutment in one direction before said second valve means is operated thereby to close communication between said quick service volume and atmosphere, and to render said biasing means effective to reseat said disc valve on said seat only subsequent to operation of said second valve means by fluid under pressure to reestablish said communication between said quick services volume and atmosphere.
Claim 12
Dependent Claim
135 words
A continual quick service valve device, as recited in claim 1, further characterized in that said second valve means comprises: a. an annular valve seat, b. an annular valve member carried on one side of said abutment and movable into seating contact with said seat upon subjecting the other side of said abutment to the fluid under pressure released from the quick action chamber to effect a substantial reduction in the effective area of said one side of said abutment whereby the pressure subsequently required in said quick service volume and acting on the reduced effective area of said one side of said abutment to subsequently unseat said annular valve member from said annular valve seat is a chosen multiple of the pressure acting on the effective area of said other side of said abutment.
Claim 13
Dependent Claim
29 words
A continual quick service valve device, as recited in claim 1, further characterized by means operative to bleed down the fluid under pressure released from the quick action chamber.
Claim 14
Dependent Claim
104 words
A continual quick service valve device, as recited in claim 1, further characterized by means operative to bleed down at a restricted rate the fluid under pressure released from the quick action chamber, said means comprising: a. a first choke, b. a check valve device connected in series relation to said first choke, and c. a second choke connected in by-pass relation to said check valve whereby the fluid under pressure effective on one side of said abutment subsequent to the seating of said check valve device is released from said one side to atmosphere via said first and said second chokes in series.
Claim 15
Dependent Claim
40 words
A continual quick service valve device, as recited in claim 9 further characterized by means restricting flow of fluid under pressure from said quick service volume to atmosphere while said annular valve member is unseated from said annular valve seat.
Claim 16
Dependent Claim
139 words
A continual quick service valve device, as recited in claim 9, further characterized by a spring-biased check valve interposed between said quick service volume and said annular valve seat whereby, upon operating of said check valve, a chosen pressure, corresponding in degree to said spring bias, is always sUpplied to the area of said annular valve member within said annular valve seat to insure unseating of said annular valve member from said annular valve seat so long as the pressure acting on the effective area of the entire lower side of said abutment is not in excess of a chosen value, a pressure in excess of said chosen value being obtained only upon said emergency valve mechanism effecting an emergency brake application, said spring-biased check valve being operative to always retain a chosen pressure in said quick service volume.
Claim 17
Dependent Claim
62 words
A continual quick service valve device, as recited in claim 9, further characterized by means for reducing the effective area of said other side of said abutment subject to the fluid under pressure released from the quick action chamber upon the fluid pressure force acting on said one side of said abutment exceeding the fluid pressure force acting on said other side.
Claim 18
Dependent Claim
103 words
A continual quick service valve device, as recited in claim 14, further characterized by a choke for venting fluid under pressure from said other side of said abutment to atmosphere at a restricted rate, said choke being so located that, subsequent to operation of said means to reduce the effective area of said other side of said abutment that is subject to the fluid under pressure released from the quick action chamber, it is thereafter ineffective to vent to atmosphere fluid under pressure released from the quick action chamber and effective on said reduced effective area of said other side of said abutment.
References Cited (Backward Citations)
US3160447A
Cited
US3175871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |