GB190519086A - Improvements in and connected with Valves for Percussive Rock Drills, Direct Acting Pumps and Engines. - Google Patents

Improvements in and connected with Valves for Percussive Rock Drills, Direct Acting Pumps and Engines.

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Publication number
GB190519086A
GB190519086A GB190519086DA GB190519086A GB 190519086 A GB190519086 A GB 190519086A GB 190519086D A GB190519086D A GB 190519086DA GB 190519086 A GB190519086 A GB 190519086A
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GB
United Kingdom
Prior art keywords
valve
passages
slide
valves
piston
Prior art date
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
Application number
Inventor
Albert Williams Daw
Zacharias Williams Daw
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190519086A publication Critical patent/GB190519086A/en
Expired legal-status Critical Current

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Abstract

19,086. Daw, A. W., and Daw, Z. W. Sept. 21. Valves and valve-gear; valvechests. - In a percussive rock drill or direct-acting pump or engine, in which a slide or piston valve is operated by fluid, the valve is made in three parts; namely, a central part 1 which carries the valve proper 2, and piston part 1<a>; 1<b> which slide in cylinders 4, 5 so as to have movement independent of the valve 2 and are connected at their outer ends with the main cylinder by passages 7, 8. The inner reduced ends of these nistons 1<a>,- 1<b> are open to pressure in the valve-chest 12, so as to move them back when the valve is shot over, and the spaces in front of the enlarged euds are permanently open to the exhaust through passages 13, 13<a>. A small bore 22 may be provided for any fluid leaking between the main piston and cylinder. Instead of being formed solid, the valve pistons may be cored out to receive extensions on the central part, the ends being connected to the exhaust through ports 19, and the reduced necks through ports 20, 20<a>. The enlargements 17<a>, 17<b> slide in enlarged portions of the bores, which have passages 21 to admit pressure from the valve-chest to assist in returning the valve pistons.
GB190519086D 1905-09-21 1905-09-21 Improvements in and connected with Valves for Percussive Rock Drills, Direct Acting Pumps and Engines. Expired GB190519086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190519086T 1905-09-21

Publications (1)

Publication Number Publication Date
GB190519086A true GB190519086A (en) 1906-06-28

Family

ID=32630471

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190519086D Expired GB190519086A (en) 1905-09-21 1905-09-21 Improvements in and connected with Valves for Percussive Rock Drills, Direct Acting Pumps and Engines.

Country Status (1)

Country Link
GB (1) GB190519086A (en)

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