Abstract: A guard assembly for a trimmer tool including a tool head, the guard assembly including a mount body forming a slot extending along a radial direction and including an attachment member; a guard body forming a perimeter configured to partially surround the tool head, the guard body forming a first opening configured to align with the slot at the mount body, the guard body forming a second opening from which a track extends along the radial direction, wherein the attachment member is extendable into the second opening and into the track, the attachment member of the mount body configured to slide within the track at the guard body; and a handle assembly extendable through the slot at the mount body and the first opening at the guard body to selectively affix the mount body to the guard body.

Abstract: A chainsaw including a body including a bar stud extending therefrom; a guide bar including a bar stud slot that receives the bar stud, wherein the bar stud slot has a length, and wherein the guide bar is configured to receive a chain; a yoke having a groove defining a length extending in a direction angularly offset from the length of the bar stud slot of the guide bar, wherein the yoke is coupled to the guide bar; a ratchet gear including a one-way motion feature and a post extending into the groove of the yoke, wherein rotating the ratchet gear in a first direction moves the guide bar to tighten the chain, and wherein rotating the ratchet gear in a second direction moves the guide bar to loosen the chain; and a pawl selectively engaged with the one-way motion feature of the ratchet gear.

Abstract: A chainsaw including a body including a bar stud extending therefrom; a guide bar including a bar stud slot that receives the bar stud, wherein the bar stud slot has a length, and wherein the guide bar is configured to receive a chain; a yoke having a groove defining a length extending in a direction angularly offset from the length of the bar stud slot of the guide bar, wherein the yoke is coupled to the guide bar; a ratchet gear including a one-way motion feature and a post extending into the groove of the yoke, wherein rotating the ratchet gear in a first direction moves the guide bar to tighten the chain, and wherein rotating the ratchet gear in a second direction moves the guide bar to loosen the chain; and a pawl selectively engaged with the one-way motion feature of the ratchet gear.

Abstract: A chainsaw including a body including a bar stud extending therefrom; a guide bar including a bar stud slot that receives the bar stud, wherein the bar stud slot has a length, and wherein the guide bar is configured to receive a chain; a yoke having a groove defining a length extending in a direction angularly offset from the length of the bar stud slot of the guide bar, wherein the yoke is coupled to the guide bar; a ratchet gear including a one-way motion feature and a post extending into the groove of the yoke, wherein rotating the ratchet gear in a first direction moves the guide bar to tighten the chain, and wherein rotating the ratchet gear in a second direction moves the guide bar to loosen the chain; and a pawl selectively engaged with the one-way motion feature of the ratchet gear.

Abstract: A chainsaw including a body including a bar stud extending therefrom; a guide bar including a bar stud slot that receives the bar stud, wherein the bar stud slot has a length, and wherein the guide bar is configured to receive a chain; a yoke having a groove defining a length extending in a direction angularly offset from the length of the bar stud slot of the guide bar, wherein the yoke is coupled to the guide bar; a ratchet gear including a one-way motion feature and a post extending into the groove of the yoke, wherein rotating the ratchet gear in a first direction moves the guide bar to tighten the chain, and wherein rotating the ratchet gear in a second direction moves the guide bar to loosen the chain; and a pawl selectively engaged with the one-way motion feature of the ratchet gear.

Abstract: The present invention provides a transgenic strain for producing succinate. The transgenic strain comprises an autotrophic host cell, and a plurality of exogenous genes within the host cell. The exogenous genes include a gene for expressing ?-ketoglutarate decarboxylase (Kgd), a gene for expressing succinate semialdehyde dehydrogenase (GabD), a gene for expressing citrate synthase (GltA) and a gene for expressing phosphoenolpyruvate carboxylase (Ppc). Further, expression of at least one of the native genes encoding glucose-1-phosphate adenylyltransferase (GlgC), succinate dehydrogenase subunit A (SdhA), and succinate dehydrogenase subunit B (SdhB) is suppressed in the host cell. The present invention further provides a method for producing succinate, which comprises: providing a transgenic strain of the present invention, and culturing the transgenic strain under a preset condition.