Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1986-08-05
1988-01-12
Parker, Roscoe V.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
251252, B24B 2300, B24B 5500, F16P 322
Patent
active
RE0325759
ABSTRACT:
To be able to control the admission of compressed air or liquid to a machine in a hand tool, the working medium can be admitted to the machine through a handle with a built-in valve. By turning the handle (1) the valve opens or closes. The valve body itself (7,9) is secured to a stay in the form of a bolt (10) and a pipe (8) screwed into the bottom of the handle casing (1), whereas the valve seat (14) is formed as a recess in a bushing (2) being stationary relative to the casing. The handle has an oblique track (4) wherein a bolt (3) secured in the bushing moves the casing (1) and thereby the valve body relative to the bushing (2) when the handle is turned. When the handle is released in the open position of the valve (FIG. 3), the pressure exerted by the medium will move the casing so as to close the valve since the area of the casing is larger than that of the bush (2). The machine can thereby be safely and reliably disconnected by releasing the hold on the handle. The valve can be used for a hand grinder with a U-shaped handle pipe with handle ends and a hollow spindle situated between the handle ends, an air machine being arranged in the spindle. The spindle has a number of slotted grinding discs, and a pressure medium is admitted to the machine through passages in the handle pipe. A simple and reliable hand grinder which can efficiently grind deep profiles is thereby obtained.
REFERENCES:
patent: 674971 (1901-05-01), Kinman
patent: 841322 (1907-01-01), Hoxie
patent: 903451 (1908-10-01), Clark
patent: 904134 (1908-11-01), Kilbourn
patent: 1298007 (1919-03-01), Cheney
patent: 1356580 (1920-10-01), Witman
patent: 2125554 (1938-08-01), Frank
patent: 2192459 (1940-03-01), Taylor
patent: 2326396 (1943-08-01), Shaeoller
patent: 2548923 (1951-04-01), Walters et al.
HH Patent ApS
Parker Roscoe V.
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