Hand crusher with rotatably mounted handle

Details Hand crusher with rotatably mounted handle Hand crusher with rotatably mounted handle

1990-08-20

1991-09-03

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Hand support comminutor

125 36, 173 37, 173169, 173170, 225105, 241266, B02C 108

Patent

active

050445685

ABSTRACT:
A hand crusher with a main body, which consists of a cylinder unit having a built-in oblong hydraulic cylinder and a parallel plate unit bonded on the periphery of said cylinder unit. Crushing arms are pivotally supported on the lower portion of the parallel plate unit, and the crushing are opened or closed in linkage with a piston rod, which extends from the hydraulic cylinder and makes reciprocal movement along the center line. Slide keys located at the tip of the piston rod engage in guide grooves on the parallel plate unit. A ring-like handle member is rotatably mounted on the rotating unit at the upper end of the cylinder unit, and a left grip and a right grip are connected on both ends of the handle member. On the inner periphery of the rotating unit of the handle member, balls are movably embedded at symmetrical positions, and catching recesses to catch the balls are furnished at every predetermined angle on the outer periphery of the rotating unit. Normally, the balls are caught in the catching recesses in a specific direction to engage the handle member and the main body together. When crushing arms are opened during operation, the left grip and the right grip are not moved. When the crushing arms engage on the object to be crushed from an oblique direction, balls are released from the recesses by reaction force, and only the main body is rotated. Both the left grip and the right grip are not swung around, and a single operator can operate the hand crusher by holding the left grip and the right grip at all times.

REFERENCES:
patent: 1847136 (1932-03-01), Rauberstrauch
patent: 2161062 (1939-06-01), Killgore
patent: 3060894 (1962-10-01), Dean, Jr. et al.
patent: 3241622 (1966-03-01), Ottosson et al.
patent: 4196862 (1980-04-01), Tagawa
patent: 4512524 (1985-04-01), Shigemizu
patent: 4548279 (1985-10-01), Zaruba
patent: 4838493 (1989-06-01), LaBounty
patent: 4890798 (1990-01-01), Tagawa et al.
patent: 4934616 (1990-06-01), Zepf
patent: 4951886 (1990-08-01), Beito

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