US 4,802,536 A · Lawn dethatcher for a rotary cultivator

Abstract

Interchangeable lawn dethatcher means for a rotary cultivator with removably affixed cultivating tines. The lawn dethatcher means includes a first rigid member and second rigid member each removably affixed to the rotary cultivator in place of the cultivating tines, and a plurality of rigid dethatchment tines removeably affixed in helical array to the first and second rigid members in mirror image relationship, respectively, each dethatchment tine being received through the rigid members and arrestingly clamped at the midpoint of the tine and each tine having a bent portion at each of its ends disposed in the direction opposite the intended direction of tine rotation. The lawn dethatcher means are supported at their outermost points from the rotary cultivator by independently rotatable utility wheels sized to permit the ends of the dethatchment tines to extent below the point of contact of the wheels with the lawn and thereby into contact with lawn thatch.

Claims8

Dependent claims

A lawn dethatcher for use with a rotary cultivator having a rotatably driven shaft with a first end and a second end and removably affixed cultivating tines disposed at said first end and at said second end, comprising:

lawn dethatcher means selectively interchangeable with the cultivating tines, including a first rigid sleeve member with a third end and a forth end, a second rigid sleeve member with a fifth end and a sixth end, and a plurality of rigid dethatchment tines and received through and removeably affixed in helical array to said first rigid member between said third end and said fourth end, and received through and removeably affixed in helical array to said second rigid member between said fifth end and said sixth end in mirror image relationship to said dethatchment tines affixed between said third end and said fourth end;
attachment means to removably affix said lawn dethatcher means at said first end and said second end to the rotatably driven shaft of a rotary cultivator;
and support means associated with each of said rigid sleeve members to position said lawn dethatcher means at the proper to dethatch grass lawns, said support means being operable free from the rotational influence of the rotatably driven shaft.

Dependencies are inferred from the claim text.

Lawn dethatcher for a rotary cultivator

Life of this patent

Lawn dethatcher for a rotary cultivator

Life of this patent

Abstract

Claims8