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US 3,943,669 AGranted
Gyratory sander
OwnerReinhold Stroezelinventor
Life of this patent
Estimating the term…
Abstract
A sanding plate is mounted in a housing with freedom of gyratory motion, and a rotatable eccentric shaft is journalled in the housing and connected with the plate for imparting the motion to the latter. A pneumatically powered rotary piston engine is mounted in the housing and connected with the shaft for rotating the same. The rotary piston of this engine has an imbalance which compensates for the imbalance resulting from the motion of the plate.
Claims12
A gyratory sander, comprising a housing;
- a sanding plate mounted on said housing with freedom of gyratory motion;
- a rotatable eccentric shaft journalled in said housing and connected with said plate for imparting said motion to the latter;
- and a pneumatically powered rotary piston engine mounted in said housing and connected with said shaft for rotating the same, said engine having a casing formed with a chamber which has the shape of a multi-lobed epitrochoid, and a rotary piston rotatably mounted in said chamber and having apex portions which are in sealing engagement with an inner circumferential surface bounding said chamber, said rotary piston of said engine having an imbalance which compensates for imbalances resulting from said motion of said plate.
A gyratory sander, comprising a housing;
- a sanding plate mounted on said housing with freedom of gyratory movement;
- a pneumatically powered rotary piston engine mounted in said housing and including a casing, and a rotary piston accommodated in said casing and having an imbalance which compensates for imbalances resulting said movement of said plate;
- a rotatable shaft journalled in said housing and said casing and extending through the latter, said shaft being connected with said plate for imparting said movement thereto and having an eccentric shaft portion on which said piston is journalled;
- and cooperating annuli of gear teeth on said piston and said casing for effecting rotation of one in response to rotation of the other.
1 more element
Dependencies are inferred from the claim text.