Grinder beam drive for a tree stump grinder

Details Grinder beam drive for a tree stump grinder Grinder beam drive for a tree stump grinder

1993-07-14

1994-10-18

Bray, W. Donald

Woodworking

Special-work machine

144375, 2411017, B27C 900

Patent

active

053559185

ABSTRACT:
The tree stump grinder assembly (12) includes a drum (176) with end flanges (178 and 180) and a central flange (182). A left hand stub shaft (102) is journaled in the drum (176) by spaced apart roller bearings (122 and 124), a bearing hub (126), and a circular plate (160) attached to an end flange (178). A right hand stub shaft (212) is journaled in the drum (176) by spaced apart bearings (218 and 222), a bearing hub (224) and a circular plate (258) attached to an end flange (180). The central spindle (114) of a hydraulic motor (116) is nonrotatably secured to the left hand stub shaft (102). The housing 144 of the hydraulic motor (116) is journaled on the central spindle (114) and is rotated relative to the spindle when hydraulic fluid is supplied through supply passage 306 and is returned to the sump ( 328) through a return passage (310). Rotation of the housing (144) drives the drum (176) through keys (202, ring member (194) and the central flange (182). Bit and block assemblies (280) on the outside surface of the drum (176) can grind tree stumps and other material. Seals (146, 246, 152 and 252) protect the roller bearings 122, 124, 218 and 222) from solid and liquid materials outside the drum (176).

REFERENCES:
patent: 346681 (1886-08-01), Perry
patent: 546747 (1896-02-01), Gutenkunst
patent: 578234 (1897-03-01), Gutenkunst
patent: 3018972 (1962-01-01), Steinmetz
patent: 3198224 (1965-08-01), Hiley
patent: 3389726 (1968-06-01), Good
patent: 3868980 (1975-03-01), Blum
patent: 3931841 (1976-01-01), Blum
patent: 4339908 (1982-07-01), Johnson
patent: 5158126 (1992-10-01), Lang
Rotary Power Inc. brochure, SMA Motors.

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