Patent US3642251A successfully refreshed from Google Patents.
US3642251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door jack
Assignee: Individual
•
Filing: 1970-04-06
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Granted: 1972-02-15
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Expires: 1990-04-06
Abstract
Abstract A door jack to facilitate the installation of doors. An elongated pry-bar is provided having a pry-foot at its lower end. An elongated stabilizing rod is provided having a pad on one end. A sleeve is secured to the upper end of the pry-bar and reciprocally receives the stabilizer rod which extends forwardly therefrom in the same general direction as the foot. A coil spring surrounding the stabilizer rod biases the rod and pad outwardly away from the pry-bar. A lock washer on the stabilizer rod locks the same against inward movement from a selected position. The foot may be inserted under the bottom edge of a door and the pry-bar pivoted rearwardly thus elevating the door to the desired elevation for hanging the same. In that position, the pad on the end of the stabilizer rod engages the surface of the door under the influence of the spring, the lock washer preventing rearward movement of the pad and stabilizer rod. Thus, the door is maintained in the desired elevated position for installation of hinges, etc. The jack may also be used for carrying the door to the installation site.
Inventors
- 👤 F J Guenther Niederholtmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:56
CPC Classifications
B; B66; B66F; B66F15/00; Y; Y10; Y10S; Y10S292/00; Y10S292/15; Y10T; Y10T292/00; Y10T292/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A door jack comprising: an elongated pry-bar member having a pry-foot formed on one end thereof, said foot extending outwardly from said pry-bar member in a given direction and defining an angle therewith; an elongated stabilizer member; means for mounting said stabilizing member on said pry-bar member adjacent the other end thereof for reciprocal movement with respect thereto, said stabilizing member having a portion extending outwardly from said pry-bar member generally in said direction and defining an angle therewith, said portion having an end spaced outwardly from said pry-bar member; spring means for biasing said end of said stabilizing member outwardly away from said pry-bar member; and locking means for preventing movement of said stabilizing member from a selected position rearwardly toward said pry-bar member.
Claim 2
Dependent Claim
125 words
A door jack comprising: an elongated pry-bar member having a pry-foot formed on one end thereof, said foot extending outwardly from said pry-bar member in a given direction and defining an angle therewith; an elongated stabilizer member; means for mounting said stabilizing member on said pry-bar member adjacent the other end thereof for reciprocal movement with respect thereto, said stabilizing member having a portion extending outwardly from said pry-bar member generally in said direction and defining an angle therewith, said portion having an end spaced outwardly from said pry-bar member; spring means for biasing said end of said stabilizing member outwardly away from said pry-bar member; and locking means for preventing movement of said stabilizing member from a selected position rearwardly toward said pry-bar member.
Claim 3
Dependent Claim
14 words
The jack of claim 1 wherein said first-mentioned angle is generally a right angle.
Claim 4
Dependent Claim
13 words
The jack of claim 2 wherein said second-mentioned angle is an acute angle.
Claim 5
Dependent Claim
32 words
The jack of claim 1 wherein said stabilizing member is a rod, said mounting means comprising a sleeve reciprocally receiving said rod and secured to said other end of said first member.
Claim 6
Dependent Claim
38 words
The jack of claim 4 wherein said one end of said rod has an engaging pad thereon, said spring means comprising a coil spring surrounding said rod and extending between said pad and one end of said sleeve.
Claim 7
Dependent Claim
26 words
The jack of claim 5 wherein said locking means comprises a lock washer on said rod between said spring and said one end of said sleeve.
Claim 8
Dependent Claim
75 words
The jack of claim 6 wherein said one end of said sleeve is beveled thereby permitting said washer to tilt under the influence of said spring so as lockingly to engage said rod, the other end of said rod projecting beyond the other end of said sleeve, and further comprising stop means on said other end of said rod and engageable with said other end of said sleeve for limiting forward movement of said rod.
Claim 9
Dependent Claim
116 words
The jack of claim 7 wherein said foot comprises a curved extension of said pry-bar member terminating in a flattened end, said first-mentioned angle being generally a right angle whereby said flattened end may be inserted under the bottom edge of a door with said curved extension resting upon a supporting surface so that rearward pivotal movement of said pry-bar member will cause said foot to elevate said bottom edge of said door, said rod being moved outwardly by said spring so that said pad engages a surface of said door, said washer selectively locking said rod against inward movement thereof and of said pad whereby said door is maintained with said bottom edge so elevated.
Claim 10
Dependent Claim
35 words
The jack of claim 4 wherein said sleeve is elongated, said sleeve being secured to said pry-bar member adjacent said one sleeve end, the other end of said sleeve being spaced from said pry-bar member.
Claim 11
Dependent Claim
39 words
The jack of claim 1 wherein said pry-bar member comprises a first part adjustably telescopically receiving a second part, and means for selectively securing sAid parts together thereby to provide selective adjustment of the length of said pry-bar member.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |