Patent ID: 8418371

Claim:
A kit for retrofitting a grass trimming apparatus with a spinning support guide, the grass trimming apparatus comprising a trimmer head assembly comprising a housing and a trimming line partially disposed within the housing, at least part of the trimming line extending external to the housing for effecting grass trimming when spun, wherein the kit includes (a) components for assembly as a spinning support guide that is removably attachable to an underside of the housing of the grass trimming apparatus, the components including (A) a base mount disc removably securable to the underside of the housing, the base mount disc including a central opening defined therethrough, (B) a plurality of spacer discs each including a central opening defined therethrough, (C) a semispherical base including a central opening defined therethrough, (D) a fastener sized and dimensioned to correspond to the central openings of the base mount disc, the plurality of spacer discs, and the semispherical base, and (E) a threaded receptacle configured to threadably receive an end of the fastener, (F) wherein the base mount disc, the plurality of spacer discs, and the semispherical base are configured to be coupled together by disposing the fastener within the opening in each of the base mount disc, the plurality of spacer discs, and the semispherical base, a portion of the fastener proximate one of its ends being threadably received within the threaded receptacle; (b) wherein the components are configured such that, when assembled as a spinning support guide utilizing a first particular set of one or more the plurality of spacer discs and attached to the trimmer head assembly of the grass trimming apparatus, operating the grass trimming apparatus by (i) holding the grass trimming apparatus in an operable position, (ii) placing the spinning support guide on a first trimmable surface, whereby the spinning support guide provides a point of contact between the grass trimming apparatus and the first trimmable surface, and (iii) effecting spinning of the trimming line, results in trimming a portion of the first trimmable surface to a first height; (c) wherein the components are configured such that, when assembled as a spinning support guide utilizing a second particular set of one or more of the plurality of spacer discs and attached to the trimmer head assembly of the grass trimming apparatus, operating the grass trimming apparatus by (i) holding the grass trimming apparatus in an operable position, (ii) placing the spinning support guide on a second trimmable surface, whereby the spinning support guide provides a point of contact between the grass trimming apparatus and the second trimmable surface, and (iii) effecting spinning of the trimming line, results in trimming a portion of the second trimmable surface to a second height; and (d) wherein the second height differs from the first height based on a difference in height of the first set of one or more spacer discs and the second set of one or more spacer discs.