Safety valve for pneumatic tools

Details Safety valve for pneumatic tools Safety valve for pneumatic tools

1976-11-02

1978-08-15

Cline, William R.

Valves and valve actuation

Balanced valves

Reciprocating

251325, 173169, 13761416, F16K 3900

Patent

active

041067509

ABSTRACT:
A safety valve for pneumatic tools, comprising first and second valve bodies which are movable relative to each other and which carry cooperating seat surfaces. The first valve body is of tubular shape and is displaceable between a closed and an opened position by means of a lever.
The second valve body is pressure balanced and biased by a spring to maintain sealing contact with the first valve body as the latter is displaced. A lever operated arresting means is arranged to lock the second valve body against movement and thereby interrupt the sealing contact between the first and second valve bodies as the first valve body is displaced.

REFERENCES:
patent: 1279087 (1918-09-01), Desmond
patent: 1607343 (1926-11-01), Davenport
patent: 1632144 (1927-06-01), Nemec
patent: 2023276 (1935-12-01), Lovekin et al.
patent: 2446011 (1948-07-01), Johnson et al.
patent: 2778599 (1957-01-01), Paul, Jr.
patent: 2939675 (1960-06-01), Karden
patent: 3294362 (1966-12-01), Schultz

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