Title: Disc standard assembly

Abstract: In a disc harrow, the disc gang is connected to the harrow frame by shock absorbing support assemblies. Each support assembly includes a rigid standard with an upper end fixed to the frame. The lower end of the standard is pivotally attached to a forward end of a bearing arm. The rearward end of the bearing arm supports the gang bolt via a bearing. A coil spring is connected between a yoke on the mid portion of the arm and a flange extending rearward from the upper end of the standard. A bolt extends through the flange and is threaded into the yoke so that the separation between the yoke and the flange may be adjusted to preload the spring.

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Inventors: Hentrich Sr., Robert D. (Walcott, IA)

Application Number: 06/172363
Filing Date: 1980-07-25
Publication_date: 1982-06-08
Assignee: DEERE & CO

Primary Class(es): 172/572 172/566
Other Classes: A01B21/08; A01B21/00; A01B21/08
US Patent Ref:

1331722	February, 1920	Remy	172/572	Pulverizer
2336848	December, 1943	Cruse	Hydraulic disk frame
2675659	April, 1954	Kopp
2762182	September, 1956	Gardner	Disc harrow
2979138	April, 1961	Martensen	172/579	Flexible disk tiller
3061018	October, 1962	Olson	172/139	Spring-loaded coulter disc
3213947	October, 1965	MacKenzie	172/578	Cushioned frame for agricultural implement
3442336	May, 1969	Morkoski	172/572	FLEXIBLE MOUNTING FOR DISK HARROW GANG
3454106	July, 1969	Youngberg	172/595	DISK HARROW
3493055	February, 1970	Peursem	172/708	CULTIVATOR SHANK STRUCTURE
3620310	November, 1971	Richey	172/600	IMPLEMENT SPRING CUSHION
3640348	February, 1972	Womble	172/573	S-SHAPED STANDARD
3700037	October, 1972	Hentrich	172/705	PLOW COLTER WITH YIELDABLE FORCE-APPLYING MEANS AND ADJUSTABLE OVERLOAD MOUNT FOR COLTER CARRYING ARM
3700038	October, 1972	Essex	172/265	ADJUSTABLE SPRING TRIP SHANK ASSEMBLY
3700039	October, 1972	Essex	172/705	SPRING TRIP SHANK ASSEMBLY
3757871	September, 1973	Maust	172/178	MINIMUM TILLAGE AGRICULTURAL IMPLEMENT
3981367	September, 1976	Mydels	172/705	Spring trip cultivator shank assembly
4004640	January, 1977	Bland	172/710	Hanger mechanism and sail engaging tool attached to tool bar thereby
4066132	January, 1978	Rehn	172/572	Disk harrow with beam member suspended by U-shaped springs
4193456	March, 1980	Ankenman	172/272	Biased agricultural implement
4213505	July, 1980	Jolley	172/510	Tractor implement carrying apparatus

Other Refs: AU12278

October, 1977

172/572

Primary Examiner: Johnson, Richard J.
Assistant Examiner:
Attorney: Wells, St. John & Roberts

Claims: