US3662136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trigger mechanism for power tool
Assignee: Leviton Manufacturing Co Inc
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Filing: 1971-05-20
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Granted: 1972-05-09
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Expires: 1991-05-20
Abstract
Abstract A trigger mechanism for operating a power tool which may be assembled for ''''Lock-Out'''' operation to prevent accidental operation of the tool or for a ''''Lock-In'''' operation for continuous operation of the tool. The trigger mechanism includes a movable trigger which operates an electrical switch and a control pin which controls movement of the trigger in operation of the switch.
Inventors
- 👤 Wolfgang F Bienwald
- 👤 William J Bowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:09
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/50; H01H13/62; H01H13/02; H01H13/04; H01H13/08; H01H3/00; H01H3/02; H01H3/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
In a trigger mechanism for controlling operation of a power tool, the assembly comprising; a. a housing; b. a manually operable trigger slidably mounted in the housing for operation of an electrical switch and being reciprocable between a forward position and rearward position in the housing; c. said trigger having a latch receiving recess formed in one side thereof; d. a spring biasing said trigger toward said rearward position; e. a control pin having an end extending through an opening in the housing and into said recess in a side of the trigger; f. a latch carried by said end of the pin and extending into said recess; g. means whereby said latch is positionable in one of two latching positions for latching said trigger and being held in one of said latching positions after assembly and before operation of said trigger; and h. spring means acting on said control pin; i. said spring means urging the control pin and the latch outwardly relative to the housing and the recess in the trigger.
Claim 2
Dependent Claim
173 words
In a trigger mechanism for controlling operation of a power tool, the assembly comprising; a. a housing; b. a manually operable trigger slidably mounted in the housing for operation of an electrical switch and being reciprocable between a forward position and rearward position in the housing; c. said trigger having a latch receiving recess formed in one side thereof; d. a spring biasing said trigger toward said rearward position; e. a control pin having an end extending through an opening in the housing and into said recess in a side of the trigger; f. a latch carried by said end of the pin and extending into said recess; g. means whereby said latch is positionable in one of two latching positions for latching said trigger and being held in one of said latching positions after assembly and before operation of said trigger; and h. spring means acting on said control pin; i. said spring means urging the control pin and the latch outwardly relative to the housing and the recess in the trigger.
Claim 3
Dependent Claim
82 words
In a trigger mechanism for controlling operation of a power tool, the assembly as defined in claim 1 which includes: a. a rib extending along the trigger and having an end terminating at the recess in the trigger; b. said end of the rib opposing and engaging with the latch in one position thereof; c. said trigger also contains an open ended groove which extends lengthwise thereof; d. said groove being located behind the rib and being shaped to receive the latch.
Claim 4
Dependent Claim
75 words
In a trigger mechanism for controlling operation of a power tool, the assembly as defined in claim 1 wherein: a. the trigger contains a second recess formed therein at an upper end thereof; and b. a latch engaging rib formed on a lower wall of said second recess; c. said second recess being shaped to receive the latch and being aligned with the control pin and latch when the trigger is in said forward position.
Claim 5
Dependent Claim
75 words
In trigger mechanism for controlling operation of a power tool, the assembly as defined in claim 2 in which: a. a second coil spring engages with and urges the control pin outwardly with the latch opposing the end of the rib; b. said second spring permitting the control pin to be depressed for manual movement of the latch out of opposing relation to the end of the rib and into alignment with the latchreceiving groove.
Claim 6
Dependent Claim
97 words
In a trigger mechanism for controlling operation of a power tool, the assembly as defined in claim 1 wherein: a. the trigger contains a second recess located at one end of the latch-receiving recess; b. said second recess being aligned with the control pin and latch when the trigger is in a depressed position; and c. a latching rib formed on a lower wall of said second recess; d. said latching rib being adapted to engage with the latch on the control pin upon rearward movement of the trigger and when the control pin is depressed therein.
Claim 7
Dependent Claim
166 words
In a trigger mechanism for controlling operation of a power tool, the combination which comprises: a. a hollow housing; b. a manually operable trigger slidably mounted in said housing; c. said trigger being movable between a forward position and a rearward position and having a latch receiving recess formed in one side thereof; d. a control pin carried by the housing and having an end extending into said latch receiving recess in the trigger; e. a latch carried by said end of the control pin and being located in said latch receiving recess; f. means for angularly positioning said latch relative to the trigger and preventing rotation of the control pin to maintain the angular positioning of said latch during operation of the trigger; g. spring means engaging with and urging said control pin outwardly relative to the housing and the trigger; and h. means on the trigger for releasably engaging with the latch on the control pin in different positions thereof relative to the trigger.
Claim 8
Dependent Claim
166 words
In a trigger mechanism for controlling operation of a power tool, the combination which comprises: a. a hollow housing; b. a manually operable trigger slidably mounted in said housing; c. said trigger being movable between a forward position and a rearward position and having a latch receiving recess formed in one side thereof; d. a control pin carried by the housing and having an end extending into said latch receiving recess in the trigger; e. a latch carried by said end of the control pin and being located in said latch receiving recess; f. means for angularly positioning said latch relative to the trigger and preventing rotation of the control pin to maintain the angular positioning of said latch during operation of the trigger; g. spring means engaging with and urging said control pin outwardly relative to the housing and the trigger; and h. means on the trigger for releasably engaging with the latch on the control pin in different positions thereof relative to the trigger.
Claim 9
Dependent Claim
126 words
In a trigger mechanism for controlling operation of a power tool, the combination as defined in claim 6 in which: a. the means on the trigger for releasably engaging with the latch includes a rib extending along the trigger and having an end terminating at the latch receiving recess therein; b. said end of the rib opposing the latch on the control pin and preventing movement of the trigger toward its forward position when the control pin is urged outwardly by the spring means acting thereon; and c. the trigger contains a groove located behind and extending lengthwise of said rib; d. said groove being shaped to accommodate the latch in one position thereof to permit movement of the trigger when the control pin is depressed.
Claim 10
Dependent Claim
105 words
In a trigger mechanism for controlling operation of a power tool, the combination is defined in claim 6 in which: a. the trigger has a second recess formed therein; b. said second recess being aligned with the control pin and latch in the forward position of the trigger; and c. the means for releasably engaging with the latch includes a rib formed on and projecting from a forward surface of said second recess; d. said rib engaging with and preventing outward movement of the control pin and latch under the influence of the spring means upon rearward movement of the trigger relative to the housing.
Claim 11
Dependent Claim
118 words
In a trigger mechanism for controlling operation of a power tool, the combination as defined in claim 6 wherein: a. the means for positioning the latch comprises a porTion of the control pin having a rectangular configuration and the housing has a rectangular opening through which said rectangular portion of the control pin extends; b. said control pin also having a portion of circular shape which permits rotation of the pin relative to the housing; c. said control pin being movable prior to assembly with the trigger to a position where said circular portion is located in the opening in the housing whereby the control pin and latch may be placed in different positions relative to the housing.
References Cited (Backward Citations)
US3356814A
Cited
US3378662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |