Related U.S. Application Data
[60] Provisional application No. 61/157, 233, filed on Mar.4, 2009.
[51] Int. Cl.
B66F 3/00 (2006.01)
[52] U.S. Cl. ………….. 254/131; 254/113; 254/120; 254/130
[58] Field of Classification Search: 254/113-140
See application file for complete search history.
[56] References Cited
U.S. PATENT DOCUMENTS
343,341 A * June 1886 Robertson 254/131
4,738,433 A * April 1988 Hoff 254/30
6,170,803 B1 * January 2001 Liberfarb 254/131
6,202,985 B1 * March 2001 Chong et al. 254/131
* cited by examiner
Primary Examiner: Lee D. Wilson
Assistant Examiner: Alvin Grant
Attorney, Agent, or Firm: Patwrite LLC; Mark David Torche
[57] ABSTRACT
Referring to the figures, a landing jack lift 100 is shown having an upright lever portion 105 which is pivotally connected to a base plate 130. Base plate 130 allows landing jack lift 100 to be used in soft soil conditions and provides a stable support in use. A lifting arm 120 is pivotally connected to upright lever portion 105 using a pivot 150. Pivot 150 is a bolt, but other pivoting means may be used such as pins, rivets, etc. as is known in the art. A lifting plate 125 is provided to fit under a landing jack 165 attached to a trailer 160 to allow a user to move landing jack 165 without having to bend over or lie on the ground. Lifting plate 125 is pivotally mounted so the as the angle changes with respect to lifting arm 120, lifting plate 125 maintains level contact with landing jack 165. Additionally, lifting plate 125 telescopically fits within lifting arm 120 in order to allow a user to adjust the length.
Figures
CROSS REFERENC
CROSS REFERENCE TO RELATED APPLICATIONS
This application claims priority and herein incorporates by reference U.S. provisional patent application 61/157,233, filed Mar. 4, 2009.
BACKGROUND OF THE INVENTION
Landing jacks are very useful when setting up trailers, truck beds and other towable devices. Although they are useful, they often require the user to raise and lower them manually which means that the user has to bend over or even lay on the ground which is uncomfortable.
There is a need for a means for raising and lowering the landing jack without having to bend over to operate.
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SUMMARY OF THE INVENTION
A landing jack lift has an upright lever portion which is pivotally attached to a base plate. A lifting arm is pivotally connected to the upright along the lower portion of the upright lever. A lifting plate is pivotally disposed on an end of the lifting arm and removably fits under a landing jack foot while in use. A pin pulling arm is pivotally disposed above the lifting arm on the upright lever portion and selectively retains the locking pin on the landing jack to allow the landing jack to move. The lifting arm is constrained to not pivot past around 90 degrees from the upright lever. In use the user is not required to bend over while raising and lowering the landing jack. A handle is provided on the upper portion of the upright lever to aid the user.
Other features and advantages of the instant invention will become apparent from the following description of the invention which refers to the accompanying drawings.
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