Patent US4256286A successfully refreshed from Google Patents.
US4256286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post pulling device
Assignee: Individual
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Filing: 1979-10-30
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Granted: 1981-03-17
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Expires: 1999-10-30
Abstract
Abstract A frame having a pair of upstanding side members is attached to the three point hitch of a tractor. The frame includes a base which can rest upon the ground adjacent a post to be removed from the ground. A plate is slidably attached for vertical movement along the side members and includes a hydraulically operated clamp for attachment to the post. A hydraulic cylinder is attached between the top of the frame and the plate and pulls the frame vertically after the clamp is attached to the post.
Inventors
- 👤 Jimmy R. Hudgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:10
CPC Classifications
E; E02; E02D; E02D9/00; E02D9/02; E04; E04H; E04H17/00; E04H17/26; E04H17/261; E04H17/265
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A pulling device comprising, in combination: an upstanding frame, a ground engaging base connected at the bottom of said frame; a plate member slidably connected to said frame for vertical movement along said frame; powered means connected between said frame and said plate member for causing powered movement of said plate; and clamp means attached to and movable with said plate member for clamping a post to be removed from the ground, said frame including a pair of side members, a pair of sleeves at least partially surrounding each of said side members and attached to said plate for slidably connecting said plate to said side members, said clamp means including one fixed jaw attached to said plate and one movable jaw slidably connected to said plate, jaw movement means connected to said movable jaw for causing movement of said jaw movable to and from said fixed jaw, said frame including a top member extending between said side members and said powered movement means including a first hydraulic cylinder extending between said top member and said plate, a mounting arm connected to said movable jaw, a slot formed in said plate and receiving said mounting arm slidably therein, said jaw movement means including a second hydraulic cylinder connected to said mounting arm.
Claim 2
Dependent Claim
212 words
A pulling device comprising, in combination: an upstanding frame, a ground engaging base connected at the bottom of said frame; a plate member slidably connected to said frame for vertical movement along said frame; powered means connected between said frame and said plate member for causing powered movement of said plate; and clamp means attached to and movable with said plate member for clamping a post to be removed from the ground, said frame including a pair of side members, a pair of sleeves at least partially surrounding each of said side members and attached to said plate for slidably connecting said plate to said side members, said clamp means including one fixed jaw attached to said plate and one movable jaw slidably connected to said plate, jaw movement means connected to said movable jaw for causing movement of said jaw movable to and from said fixed jaw, said frame including a top member extending between said side members and said powered movement means including a first hydraulic cylinder extending between said top member and said plate, a mounting arm connected to said movable jaw, a slot formed in said plate and receiving said mounting arm slidably therein, said jaw movement means including a second hydraulic cylinder connected to said mounting arm.
Claim 3
Dependent Claim
47 words
The post puller of claim 1 wherein said frame includes a pair of vertically disposed side members, and further including a mounting boss attached to each of said side members, a cross member attached between said side members, a third mounting point attached to said cross member.
Claim 4
Dependent Claim
56 words
The pulling device of claim 1 wherein said mounting arm includes an enlarged end on the opposite side of said plate from said movable jaw, guide means at least partially surrounding said enlarged head for guiding said arm along a path of travel through said slot, said second hydraulic cylinder being attached to said enlarged head.
Claim 5
Dependent Claim
168 words
In combination with an upright frame including a pair of upright side members, a pair of sleeve members slidably mounted on said side members therealong, an edge upstanding plate extending and secured between said sleeve members, an outstanding fixed jaw carried by and projecting outwardly of one side of said plate between said sleeve members and adjacent one sleeve member and facing toward the other sleeve member, said plate having a horizontal slot formed therethrough between said fixed jaw and said other sleeve member, said other side of said plate having elongated guide structure supported therefrom extending along said slot, an elongated movable jaw extending and slidable through said slot including a head on one end guidingly engaged with said guide structure and with the other end of said movable jaw opposing and movable toward and away from said fixed jaw, and motor means operatively connected between said head and one of said sleeves for shifting said head along said guide structure and said jaw through said slot.
Claim 6
Dependent Claim
168 words
In combination with an upright frame including a pair of upright side members, a pair of sleeve members slidably mounted on said side members therealong, an edge upstanding plate extending and secured between said sleeve members, an outstanding fixed jaw carried by and projecting outwardly of one side of said plate between said sleeve members and adjacent one sleeve member and facing toward the other sleeve member, said plate having a horizontal slot formed therethrough between said fixed jaw and said other sleeve member, said other side of said plate having elongated guide structure supported therefrom extending along said slot, an elongated movable jaw extending and slidable through said slot including a head on one end guidingly engaged with said guide structure and with the other end of said movable jaw opposing and movable toward and away from said fixed jaw, and motor means operatively connected between said head and one of said sleeves for shifting said head along said guide structure and said jaw through said slot.
Claim 7
Dependent Claim
68 words
The combination of claim 4 wherein said upright frame includes upper and lower transverse members extending and connected between the upper and lower ends of said upright side members, motor means operatively connected between said upper transverse member and said plate for shifting the latter along said upright side members, one side of said frame including anchor structure for attachment to the three point hitch of a tractor.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |