US4097705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick lock-release mechanism for a trigger switch
Assignee: SINGER ACQUISITION HOLDINGS COMPANY 8 STAMFORD FORUM STAMFORD CT 06904 A DE CORP
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Filing: 1977-08-05
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Granted: 1978-06-27
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Expires: 1997-08-05
Abstract
Abstract A quick lock-release mechanism for a trigger of a trigger switch mounted in the handle of a drill housing for activating a motor of a drill, which mechanism will selectively lock and release the trigger. The trigger is slidably connected in the handle with a tapered member affixed in the handle. A locking member is slidably connected to the tapered member and is in superposition to the trigger. A spring is disposed between the trigger and the locking member normally to urge each in opposite directions. The locking member is moveable outwardly of the handle to be forced by the tapered member into a wedge lock position against the trigger whereby the trigger switch is locked "on" and releasable upon slight trigger depression.
Inventors
- 👤 Don L. Harvell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:42
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/02; H01H9/06; H01H9/063; H01H9/061; H01H11/00; H01H2011/0075
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A quick lock-release mechanism for a trigger of a trigger-switch mounted in the handle of a drill housing for activating a motor of a drill, said mechanism selectively to lock or release the trigger comprising: (a) the trigger slidably connected in the handle, (b) a tapered member affixed in the handle, (c) a locking member slidably connected to the tapered member and in superposition to the trigger, (d) a spring disposed between the trigger and the locking member normally to urge each in opposite direction, and (e) the locking member movable outwardly to be forced by the tapered member into a wedge-lock position against the trigger whereby the trigger-switch is locked "on" and releasable upon slight trigger depression.
Claim 2
Dependent Claim
118 words
A quick lock-release mechanism for a trigger of a trigger-switch mounted in the handle of a drill housing for activating a motor of a drill, said mechanism selectively to lock or release the trigger comprising: (a) the trigger slidably connected in the handle, (b) a tapered member affixed in the handle, (c) a locking member slidably connected to the tapered member and in superposition to the trigger, (d) a spring disposed between the trigger and the locking member normally to urge each in opposite direction, and (e) the locking member movable outwardly to be forced by the tapered member into a wedge-lock position against the trigger whereby the trigger-switch is locked "on" and releasable upon slight trigger depression.
Claim 3
Dependent Claim
111 words
The combination claimed in claim 1 wherein: (a) the locking member has an extended locked position and a retracted released position. (b) the trigger has an extended "off" position and a variable depressed "on" position, (c) the locking member having a lever extending outwardly of the handle, a tapered shoe slidably engaging the tapered member, and a shoulder formed intermediate the tapered shoe and the lever, (d) a shoulder formed on the trigger facing the shoulder on the locking member, (e) a cavity formed in the trigger including the trigger shoulder, (f) the spring is nested in the cavity, and (g) the shoulder of the locking member extends into the cavity.
Claim 4
Dependent Claim
85 words
The combination claimed in claim 2 in which the trigger switch is included in a motor speed control circuit in which the increased depression of the trigger will cause increased speed of the motor wherein: (a) the locking member in unlocked position movable independently of the trigger, and in locked position being releaseable upon trigger depression, and (b) the locking member being shifted into the locked position to prevent automatic release of the trigger upon the trigger being depressed to attain a predetermined motor speed.
Claim 5
Dependent Claim
77 words
The combination claimed in claim 3 wherein: (a) the locking member disposed in the handle above the trigger to move substantially in straight line motion parallel to the trigger, (b) a friction surface formed on the underside of the tapered shoe, (c) a friction surface formed on the upperside of the trigger adjacent to the friction surface of the locking member whereby on forward motion of the locking member the respective friction surfaces to be wedged-locked together.
Claim 6
Dependent Claim
25 words
The combination in claim 4 wherein: (a) the friction surface of the trigger of substantial greater length than the friction surface of the locking member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |