US1633777A - Retarded release-valve device - Google Patents

Retarded release-valve device Download PDF

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Publication number
US1633777A
US1633777A US54887A US5488725A US1633777A US 1633777 A US1633777 A US 1633777A US 54887 A US54887 A US 54887A US 5488725 A US5488725 A US 5488725A US 1633777 A US1633777 A US 1633777A
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United States
Prior art keywords
piston
retarded release
valve device
triple valve
valve
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US54887A
Inventor
Clyde C Farmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Air Brake Co
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Westinghouse Air Brake Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Air Brake Co filed Critical Westinghouse Air Brake Co
Priority to US54887A priority Critical patent/US1633777A/en
Application granted granted Critical
Publication of US1633777A publication Critical patent/US1633777A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
    • B60T15/184—Railway control or brake valves
    • B60T15/185—Railway control or brake valves with one slide valve

Definitions

  • This invention relates to fluid pressure brakes and more particularly to a triple valve device.
  • triple valve devices When triple valve devices are being operart-ed in service, itoccasionally happens that the triple valve piston becomes cooked in the piston cylinder, thereby causing 't'aulty operation of the triple valve device.
  • One object of my invention is to obviate the above. difficulty by providing an improved guiding means for the piston.
  • Fig. 1 is a vertical section of a triple valve device embodying my invention
  • Fig. 2 a partial transverse section of the triple valve device showing the improved retarded release stop device
  • Fig. 3 a side elevation of the retarded release stop device.
  • the triple valve device may comprise a casing 1 having a piston chamber 2 containing a piston 3, which is adapted to operate main slide valve 5 and graduating slide valve 6 through stem 4, said valves being disposed in slide valve bushing 7, which is fitted in casing 1.
  • the casing 1 is provided with an opening at one end adapted to be closed by a plug 8 having screwthreaded engagement with the casing 1.
  • the plug 8 is provided with an inwardly extending portion 9 having a central bore 10 in accurate alinement with the piston cylinder 2.
  • the piston stem 1 is provided with a rearwardly extending cylindrical guide portion 22, which is adapted to engage and have a neat sliding fit in the bore 10.
  • a retarded release stop comprising a tubular member 11 adapted to be applied over the guide portion 22 and having an outwardly flaring flange 12 at one end adapted to engage the end of the slide valve bushing 7, and an inwardly extending flange 13 spaced from the other end and adapted to engage a collar 1 1 on piston stem 4:-
  • a coil spring 20 is interposed between the flange 13 and the plug 8.
  • the brake pipe pressure is increased.
  • the triple valve piston 3 is shifted to its innermost or retarded release position, moving the release stop member rearwardly against the resistance of spring 20.
  • the triple valve piston will only move to full release position, in which the slide valve 5 engages the retarded release stop 11.
  • the provision of the extended guide mem ber 22 in connection with the triple valve piston stem 4, serves to prevent cocking or" the triple valve piston, and where employed with a retarded release triple valve device, I have provided a release stop adapted to be applied in connection with the guide member.
  • a triple valve device comprising a casing having apiston chamber and a valve chamber, a piston in said piston chamber, a slide valve mounted in said valve chamber, a piston stem carried by said piston for operating said Valve, a guide member extending rearwardly of said stem, a collar disposed between said stem and said extenlease stop device comprising a movable sion, and a tubular stop member engaging tubular member engaging said valve, and a said valve and having a flange engaging spring for opposing movement of said mem- 10 said collar.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)

Description

l 1,633,777 c. c. FARMER RETARDED RELEASE vALvE DEVICE Ju nef 28 1927.
Filed Sept. 8, 1925 l \l\\ 6 %/////,,W//// INVENTOR CLYDE QFARMER ATTORNEY Patented June 28, 1927.
"UNITED STATES-- v 1,633,777 PATENT OFFICE,
CLYDE c. FARMER, 0E rrTTsBUReH, PENNSYLVANIA, ASSIGNOR To THE WESTING- HOUSE AIR BRAKE COMPANY, or WILMEBDING, PENNSYLVANIA, A conrona- TION OF PENNSYLVANIA.
' RETARDED RELEASE-VALVE nEvIcE,
Application filed September 8, 1925. Serial No. 54,88 7.
This invention relates to fluid pressure brakes and more particularly to a triple valve device.
When triple valve devices are being operart-ed in service, itoccasionally happens that the triple valve piston becomes cooked in the piston cylinder, thereby causing 't'aulty operation of the triple valve device.
One object of my invention is to obviate the above. difficulty by providing an improved guiding means for the piston.
Where my improved piston guide is employed in connection with a triple valve device of the retarded release type, the usual retarded release stop. would interfere with the installation of the guide and therefore a further object of my invention is to provide a retarded release stop adapted to be employed with the improved piston guide.
In the accompanying drawing; Fig. 1 is a vertical section of a triple valve device embodying my invention; Fig. 2 a partial transverse section of the triple valve device showing the improved retarded release stop device; and Fig. 3 a side elevation of the retarded release stop device. I
As shown in the drawing, the triple valve device may comprise a casing 1 having a piston chamber 2 containing a piston 3, which is adapted to operate main slide valve 5 and graduating slide valve 6 through stem 4, said valves being disposed in slide valve bushing 7, which is fitted in casing 1.
According to my invention, the casing 1 is provided with an opening at one end adapted to be closed by a plug 8 having screwthreaded engagement with the casing 1. The plug 8 is provided with an inwardly extending portion 9 having a central bore 10 in accurate alinement with the piston cylinder 2. The piston stem 1 is provided with a rearwardly extending cylindrical guide portion 22, which is adapted to engage and have a neat sliding fit in the bore 10. I
In order to provide for retarded release, a retarded release stop is employed, comprising a tubular member 11 adapted to be applied over the guide portion 22 and having an outwardly flaring flange 12 at one end adapted to engage the end of the slide valve bushing 7, and an inwardly extending flange 13 spaced from the other end and adapted to engage a collar 1 1 on piston stem 4:-
bushing 7 so as to prevent rotation or" the member 11.
In order to yieldingly maintain the member 11 in its normal full release position, a coil spring 20 is interposed between the flange 13 and the plug 8.
When fluid under pressure on opposite sides of piston 3 is equalized, said piston and consequently slide valves 5 and 6' are maintained in the normal full release position, as shown in Fig. 1 of the drawing.
After the brakes have been applied in theusual manner, it it is desired to release the brakes, the brake pipe pressure is increased. At the head end of the train where the increase in brake pipe pressure is at a rapid rate, the triple valve piston 3 is shifted to its innermost or retarded release position, moving the release stop member rearwardly against the resistance of spring 20. At the rear of the train, where the rate of increase in brake pipe pressure is less than at the head end, the triple valve piston will only move to full release position, in which the slide valve 5 engages the retarded release stop 11.
The provision of the extended guide mem ber 22 in connection with the triple valve piston stem 4, serves to prevent cocking or" the triple valve piston, and where employed with a retarded release triple valve device, I have provided a release stop adapted to be applied in connection with the guide member.
Having now described my invention, what I claim as new and desire to secure by Letters Patent, is
1. A triple valve device comprising a casing having apiston chamber and a valve chamber, a piston in said piston chamber, a slide valve mounted in said valve chamber, a piston stem carried by said piston for operating said Valve, a guide member extending rearwardly of said stem, a collar disposed between said stem and said extenlease stop device comprising a movable sion, and a tubular stop member engaging tubular member engaging said valve, and a said valve and having a flange engaging spring for opposing movement of said mem- 10 said collar. ber.
o 2. The combination with a triple valve In testimony whereof I have hereunto set device having a piston and a slide valve my hand. operable by said piston, of a; retarded re- 3 CLYDE C. FARMER.
US54887A 1925-09-08 1925-09-08 Retarded release-valve device Expired - Lifetime US1633777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US54887A US1633777A (en) 1925-09-08 1925-09-08 Retarded release-valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54887A US1633777A (en) 1925-09-08 1925-09-08 Retarded release-valve device

Publications (1)

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US1633777A true US1633777A (en) 1927-06-28

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