US3986246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draft gear removing device
Assignee: GEMMILL RUTH E (SUCCESSOR TO LYNDON C GEMMILL OF AN UNDIVIDED THIRTY (30) PERCENT INTEREST)
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Filing: 1975-03-12
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Granted: 1976-10-19
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Expires: 1995-03-12
Abstract
Abstract A hydraulic extractor and its use in removing damaged draft gear which are wedged in railway cars. It consists of a length of pressure resistant hose folded at its center to lie flat upon itself when empty, and having connections at both ends for receiving hydraulic fluid under pressure. Also included is an arrangement for feeding the hose into the restricted space above the draft yoke and below the draft sill. That arrangement comprises a pair of strips of sheet metal of a width generally the same as that of the flat hose, and means connecting the strips together at one end. The hose is placed between the strips, with the fold near the connecting means. A rudimentary winch is provided for connection by a cable to the metal strips where they are connected. In use, the cable is fed through the space to be expanded, and connected to the winch, and the hose in its protective metal strips is winched into the desired location. When hydraulic fluid under pressure is forced into the hose at both ends, it expands laterally, driving the draft yoke and draft gear downward and out of the pocket.
Inventors
- 👤 Lyndon C. Gemmill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:57
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/026; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49822; Y10T29/53; Y10T29/53796; Y10T29/5383
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A method of extracting damaged draft gear from a railroad car from which the coupler, cross key, and carrier iron have been removed which comprises the steps of: a. positioning an empty pliable tubular member between insertion means comprising a pair of overlying strips of abrasion resistant material connected together at first ends, said overlying strips engaging the tubular member only frictionally; b. pulling on the connection between said strips to draw the insertion means and hence the tubular member endwise into and substantially through the restricted space between the draft yoke and the draft sill thereabove; and c. supplying fluid under pressure to said tubular member to cause it to expand laterally, applying force from said strips to displace the yoke and gear downwardly.
Claim 2
Independent Claim
125 words
A method of extracting damaged draft gear from a railroad car from which the coupler, cross key, and carrier iron have been removed which comprises the steps of: a. positioning an empty pliable tubular member between insertion means comprising a pair of overlying strips of abrasion resistant material connected together at first ends, said overlying strips engaging the tubular member only frictionally; b. pulling on the connection between said strips to draw the insertion means and hence the tubular member endwise into and substantially through the restricted space between the draft yoke and the draft sill thereabove; and c. supplying fluid under pressure to said tubular member to cause it to expand laterally, applying force from said strips to displace the yoke and gear downwardly.
Claim 3
Dependent Claim
29 words
The method of claim 1 in which the tubular member is folded on itself, and positioned in the insertion means so that the fold enters the restricted space first.
Claim 4
Dependent Claim
73 words
The method of claim 1 which includes the preliminary steps of: a. feeding one end of a filar member, in a direction toward the center of the car, through the space into which the insertion means is to be introduced, the other end of said filar member being attached to the insertion means at the connected ends thereof, and b. using the filar member to winch the insertion means into the restricted space.
Claim 5
Dependent Claim
134 words
Apparatus for removing damaged draft gear from a railroad car comprising, in combination: a pliable tubular member of pressure resistant material; insertion means for drawing the member while flat into the restricted space above the yoke of the draft gear to be removed, said means comprising two overlying substantially flat strips of abrasion resistant material, the width of said strips beging generally that of the tubular member when flat, and connecting means for joining together first ends of the two strips, the other ends being free, so that when the tubular member is inserted between the strips, the inner faces of the strips frictionally engage outer surfaces of the tubular member; and means for conducting fluid under pressure to the member so that its resulting expansion may force the yoke and draft gear downwardly.
Claim 6
Dependent Claim
134 words
Apparatus for removing damaged draft gear from a railroad car comprising, in combination: a pliable tubular member of pressure resistant material; insertion means for drawing the member while flat into the restricted space above the yoke of the draft gear to be removed, said means comprising two overlying substantially flat strips of abrasion resistant material, the width of said strips beging generally that of the tubular member when flat, and connecting means for joining together first ends of the two strips, the other ends being free, so that when the tubular member is inserted between the strips, the inner faces of the strips frictionally engage outer surfaces of the tubular member; and means for conducting fluid under pressure to the member so that its resulting expansion may force the yoke and draft gear downwardly.
Claim 7
Dependent Claim
119 words
Apparatus according to claim 4, together with traction means including: a filar member attached to the connecting means of the insertion means; a winch comprising a drum, means for connecting the filar member to the drum for coiling therearound, a frame, and means for mounting the drum for rotation in the frame; means for securing the frame to the bottom of a draft sill at the location of a draft gear to be extracted; an arm projecting upwardly from the frame to bear laterally against the end of the draft yoke when the frame is so secured; and a pulley carried by the arm to lead the filar member from the insertion means to the drum of the winch.
Claim 8
Dependent Claim
37 words
Apparatus according to claim 4 in which the tubular member is folded on itself and is inserted into the restricted space fold first, and in which the fluid is conducted to both ends of the tubular member.
Claim 9
Dependent Claim
43 words
Apparatus according to claim 4 in which the tubular member is folded on itself and is positioned in the insertion means with the fold adjacent the connecting means thereof, and in which the fluid is conducted to both ends of the tubular member.
Claim 10
Dependent Claim
25 words
Apparatus according to claim 4 together with a source of hydraulic fluid and means supplying fluid from said source under pressure to the tubular member.
Claim 11
Dependent Claim
13 words
Apparatus according to claim 4 in which abrasion resistant material is sheet metal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |