# US 8,739,894 B2 · Handheld work apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,894 B2 - Document ID: US8739894B2 - Status: Granted - Kind: B2 - Application number: 13/307,657 - Filed: 2011-11-30 - Published: 2012-06-07 - Granted: 2014-06-03 - Earliest claimed: 2010-12-01 - Assignees: Andreas Stihl AG & Co. KG - Applicants: Patrick Schlauch; Roland Adam; Heiko Stöcker - Inventors: Patrick Schlauch; Roland Adam; Heiko Stöcker - Web page: https://patentgrep.com/patent/US8739894B2 ## CPC - B27B 17/00: Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)} - B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} - Y10T 74/20438: Single rotatable lever [e.g., for bicycle brake or derailleur] - B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01) - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a handheld work apparatus having a handle. A throttle trigger and a throttle trigger lock are arranged on the handle. An operating-mode selector having an off position, an operating position and a starting position is provided. The selector, trigger lock and the trigger are pivotally mounted. A first latching element is provided on the selector and a second latching element is provided on the trigger element, which coact in the starting position of the selector and the starting position of the trigger and hold the trigger in its starting position. To ensure that the starting position of the selector can only be engaged when the trigger is actuated, the second latching element lies outside of the pivot path of the first latching element in the non-actuated position of the trigger. ## Claims ### Claim 1 A handheld work apparatus comprising: a housing; a handle configured to be arranged above said housing in a typical storage position of said work apparatus and said handle being configured as a carrying handle; a throttle trigger having a starting position and a non-actuated position; said throttle trigger being arranged on said handle; a throttle trigger lock arranged on said handle; an operating-mode selector having an off position, an operating position and at least one starting position; said throttle trigger, said throttle trigger lock and said operating-mode selector being pivotally mounted; a first latch element defining a first pivot path and being arranged on said operating-mode selector; a second latch element arranged on said throttle trigger; said first and second latch elements being configured to coact in said starting position of said operating-mode selector and said starting position of said throttle trigger so as to hold said throttle trigger in said starting position thereof; and, said second latch element being configured to lie outside of said first pivot path of said first latch element when said throttle trigger is in said non-actuated position. ### Claim 2 (depends on 1) The work apparatus of claim 1, wherein: said throttle trigger has a full throttle position; said second latch element is configured to pivot through said first pivot path of said first latch element when moving said throttle trigger from said non-actuated position to said full throttle position; and, said second latch element is configured to lie outside of said first pivot path of said first latch element when said throttle trigger is in the full throttle position. ### Claim 3 (depends on 1) The work apparatus of claim 1, wherein: said second latch element defines a second pivot path; and, said first latch element is configured to lie in said second pivot path of said second latch element when said operating-mode selector is in said starting position of said operating-mode selector. ### Claim 4 (depends on 1) The work apparatus of claim 1, wherein: said throttle trigger defines a first pivot axis; said first latch element and said second latch element are configured to extend in the direction of said first pivot axis; said first latch element and said second latch element are configured to be mutually latched when said operating-mode selector is in said starting position thereof and said throttle trigger is in said starting position thereof; and, said first latch element and said second latch element are configured so that the latching of said first and second latch elements is released when said operating-mode selector is moved from said starting position thereof into said off position thereof. ### Claim 5 (depends on 4) The work apparatus of claim 4, wherein one of said first and second latch elements is configured to move said other one of said latch elements in the direction of said first pivot axis of said throttle trigger when said latching is released. ### Claim 6 (depends on 4) The work apparatus of claim 4, wherein at least one of said first latch element and said second latch element is deformed when said latching is released. ### Claim 7 (depends on 4) The work apparatus of claim 4, wherein: at least one of said first and second latch elements has a section which is inclined toward said first pivot axis of said throttle trigger; said section is configured to slide off on the other one of said latch elements when said operating-mode selector is pivoted from said starting position into said off position. ### Claim 8 (depends on 7) The work apparatus of claim 7, wherein one of said first latch element and said second latch element is a lug. ### Claim 9 (depends on 8) The work apparatus of claim 8, wherein: said lug has a free end; and, said section which is inclined towards said first pivot axis of said throttle trigger is arranged on said free end of said lug. ### Claim 10 (depends on 1) The work apparatus of claim 1, wherein at least one of said first latch element and said second latch element is an arch-shaped wall section which forms a receptacle for said other one of said latch elements. ### Claim 11 (depends on 10) The work apparatus of claim 10, wherein said arch-shaped wall section is arranged on an arm of said throttle trigger. ### Claim 12 (depends on 1) The work apparatus of claim 1, wherein said operating-mode selector has a receptacle for a contact pin. ### Claim 13 (depends on 1) The work apparatus of claim 1, wherein: said throttle trigger defines a first pivot axis; said throttle trigger lock defines a second pivot axis; said operating-mode selector defines a third pivot axis; said first pivot axis of said throttle trigger, said second pivot axis of said throttle trigger lock, and said third pivot axis of said operating-mode selector are mutually parallel; said second pivot axis is at a distance (a) to said first pivot axis; said first pivot axis is at a distance (b) to said third pivot axis; and, said second pivot axis is at a distance (c) to said third pivot axis. ### Claim 14 (depends on 1) The work apparatus of claim 1, further comprising: an actuating element having a contact point and being configured for actuating a drive motor of said work tool and to engage on the throttle trigger; said contact point of said actuating element having a distance (d) to said second latch element; said throttle trigger defining a first pivot axis; said contact point of said actuating element having a distance (e) to said first pivot axis of said throttle trigger; and, said distance (d) being up to a third as large as said distance (e).