Patent US4007526A successfully refreshed from Google Patents.
US4007526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn-edge trimmer with detachable handle
Assignee: Max Langenstein Feld und Gartengeraete GmbH and Co
•
Filing: 1976-05-07
•
Granted: 1977-02-15
•
Expires: 1996-05-07
Abstract
Abstract A lawn-edge trimmer with a grip at the top of a motor housing, a shield plate at the bottom of that housing overlying a rotor, and a detachable mounting forming a socket for a long-stemmed handle has a motor-control switch with a spring-loaded trigger on the underside of the grip in a cutout of the web-shaped mounting. The tubular handle stem is axially traversed by a thrust rod which, on being displaced by a knob near the handle, acts through a camming mechanism on the mounting to depress the trigger when the mounting and the handle are emplaced on the housing.
Inventors
- 👤 Max Langenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:31
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A lawn-edge trimmer comprising: a housing rigid with a laterally extending grip at the top thereof and with a generally horizontal shield plate at the bottom thereof; a motor in said housing provided with a switch including a spring-biased trigger on said grip depressible to energize said motor; a rotatable cutter underneath said shield plate driven by said motor; a mounting member detachably secured to said housing between said grip and said shield plate; a tubular stem extending inclinedly upwardly from said mounting member and terminating in a handle above the level of said grip; an ancillary actuator for said switch on said stem adjacent said handle; and link means operatively connecting said actuator with said trigger, said link means including a force-transmitting element movably held in said stem.
Claim 2
Dependent Claim
129 words
A lawn-edge trimmer comprising: a housing rigid with a laterally extending grip at the top thereof and with a generally horizontal shield plate at the bottom thereof; a motor in said housing provided with a switch including a spring-biased trigger on said grip depressible to energize said motor; a rotatable cutter underneath said shield plate driven by said motor; a mounting member detachably secured to said housing between said grip and said shield plate; a tubular stem extending inclinedly upwardly from said mounting member and terminating in a handle above the level of said grip; an ancillary actuator for said switch on said stem adjacent said handle; and link means operatively connecting said actuator with said trigger, said link means including a force-transmitting element movably held in said stem.
Claim 3
Dependent Claim
41 words
A lawn-edge trimmer as defined in claim 1 wherein said link means further comprises a cam on said mounting member positively connected with said element and a cam follower on said mounting member displaceable by said cam to depress said trigger.
Claim 4
Dependent Claim
41 words
A lawn-edge trimmer as defined in claim 2 wherein said element is a push rod bearing down upon said cam, further comprising a biasing spring on said mounting member bearing upon said cam to resist displacement thereof by said push rod.
Claim 5
Dependent Claim
26 words
A lawn-edge trimmer as defined in claim 3 wherein said cam is slidably guided on said mounting member for movement substantially in line with said stem.
Claim 6
Dependent Claim
34 words
A lawn-edge trimmer as defined in claim 3 wherein said cam follower is a lever fulcrumed on said mounting member and provided with a pair of extremities respectively contacting said cam and said trigger.
Claim 7
Dependent Claim
23 words
A lawn-edge trimmer as defined in claim 5 wherein the fulcrum of said lever is laterally offset from a line interconnecting said extremities.
Claim 8
Dependent Claim
55 words
A lawn-edge trimmer as defined in claim 6 wherein said mounting member comprises a substantially vertical web in a plane including the axis of said stem, said lever being disposed in a cutout of said web and being provided with a bifurcation straddling an edge of said cutout, said fulcrum being located on said bifurcation.
Claim 9
Dependent Claim
48 words
A lawn-edge trimmer as defined in claim 3 wherein said mounting member comprises a substantially vertical web in an axial plane of said stem, said cam being disposed in an aperture of said web and being provided with a pair of wings straddling an edge of said aperture.
Claim 10
Dependent Claim
17 words
A lawn-edge trimmer as defined in claim 8 wherein said biasing spring is located in said aperture.
Claim 11
Dependent Claim
29 words
A lawn-edge trimmer as defined in claim 1 wherein said mounting member forms a socket for a lower end of said stem, said element passing downwardly through said socket.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |