US3800616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety grip for powered implement
Assignee: Jacobsen Manufacturing Co
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Filing: 1973-08-20
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Granted: 1974-04-02
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Expires: 1993-08-20
Abstract
Abstract A safety grip for powered implements of the hand-controlled type and including a hand grip being horizontally disposed and having a lever connected therewith and pivoted on a horizontal axis and extending above the hand grip. The weight of the operator''s hand and arm are then placed downwardly onto the lever which automatically pivots the lever and which moves the lever into closed position with the hand grip and the operator need not squeeze the lever and hand grip together to achieve the closed position. The lever is connected to the drive train of the implement for controlling mobilization of the implement, and the lever is thus in the nature of a dead man''s control.
Inventors
- 👤 K Hoffmeyer
- 👤 C Wuerker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:02
CPC Classifications
G; G05; G05G; G05G1/00; G05G1/04; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20006; Y10T74/20396; Y10T74/20576; Y10T74/20582; Y10T74/20612
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
284 words
In a safety grip for powered implements of the handcontrolled type, a handle, a hand grip on the end of said handle, a lever pivotally connected on said handle, a control attachment connected to said lever and extending therefrom along said handle for controlling the operation of the powered implement according to the pivoted position of said lever, said hand grip being disposed to extend at least generally in a horizontal direction of orientation for being approached by the operator''s hand from above said grip in the gripping of said hand grip, the improvement comprising said lever being disposed directly above said hand grip and being pivotal in the vertical plane thereabove and being arranged to overlie said grip and having some of the shape of said grip to conform therewith into a grip unit in the downwardly pivoted position of said lever, said lever and said grip being clear of any obstruction in the vertical plane thereabove so that the operator''s arm can be disposed directly above said lever when his hand is on said lever, whereby the downward force of the weight of the hand and arm of the operator holds said lever downward without the need for hand-squeezing said lever to said grip, an extendible member included in said control attachment and being extendible for temporary extension of said control attachment in response to pivotal movement of said lever into said downward pivotal position of said lever, whereby said lever can be positioned into the conforming overlying abutment with said grip, and resilient means operative on said control attachment for yieldingly urging said control attachment, and thereby also said lever, into the direction for the upward pivotal position of said lever.
Claim 2
Dependent Claim
284 words
In a safety grip for powered implements of the handcontrolled type, a handle, a hand grip on the end of said handle, a lever pivotally connected on said handle, a control attachment connected to said lever and extending therefrom along said handle for controlling the operation of the powered implement according to the pivoted position of said lever, said hand grip being disposed to extend at least generally in a horizontal direction of orientation for being approached by the operator''s hand from above said grip in the gripping of said hand grip, the improvement comprising said lever being disposed directly above said hand grip and being pivotal in the vertical plane thereabove and being arranged to overlie said grip and having some of the shape of said grip to conform therewith into a grip unit in the downwardly pivoted position of said lever, said lever and said grip being clear of any obstruction in the vertical plane thereabove so that the operator''s arm can be disposed directly above said lever when his hand is on said lever, whereby the downward force of the weight of the hand and arm of the operator holds said lever downward without the need for hand-squeezing said lever to said grip, an extendible member included in said control attachment and being extendible for temporary extension of said control attachment in response to pivotal movement of said lever into said downward pivotal position of said lever, whereby said lever can be positioned into the conforming overlying abutment with said grip, and resilient means operative on said control attachment for yieldingly urging said control attachment, and thereby also said lever, into the direction for the upward pivotal position of said lever.
Claim 3
Dependent Claim
27 words
The safety grip as claimed in claim 1, wherein said control attachment includes two pieces, and said extendible member is a spring connected between said two pieces.
Claim 4
Dependent Claim
69 words
The safety grip as claimed in claim 1, and including a stop on said lever for engaging said handle and thereby limiting upward pivotal movement of said lever in the direction against the urging of said resilient means, and with said resilient means on said control attachment being of an adequate length to have resilient action sufficient for yieldingly holding said lever in said upward position against said stop.
Claim 5
Dependent Claim
42 words
The safety grip as claimed in claim 1, wherein said grip is cylindrically shaped and said lever is arcuate in its cross-sectional shape to conform to the curvature of said grip and rest thereover when said lever is depressed onto said grip.
Claim 6
Dependent Claim
53 words
The safety grip as claimed in claim 1, including a U-shaped piece pivotal with said lever and extending across the plane of said handle and into abutment with said handle when said lever is pivoted away from said gRip, for limiting pivotal movement of said lever in the direction away from said grip.
Claim 7
Dependent Claim
45 words
The safety grip as claimed in claim 5, wherein said piece is related to said lever in a disposition wherein said lever can pivot to an angle of at least 45* away from the longitudinal axis of said grip before said piece abuts said handle.
References Cited (Backward Citations)
US2696705A
Cited
US2847924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |