US3707126A - Hopper gate latching mechanism - Google Patents

Hopper gate latching mechanism Download PDF

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Publication number
US3707126A
US3707126A US3707126DA US3707126A US 3707126 A US3707126 A US 3707126A US 3707126D A US3707126D A US 3707126DA US 3707126 A US3707126 A US 3707126A
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US
United States
Prior art keywords
latch
plate
movement
closed
disengaged
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Francis M Nester
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Keystone Industries Inc
Original Assignee
Keystone Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Keystone Industries Inc filed Critical Keystone Industries Inc
Priority to US5424570A priority Critical
Application granted granted Critical
Publication of US3707126A publication Critical patent/US3707126A/en
Publication of US3707126B1 publication Critical patent/US3707126B1/en
Assigned to KEYSTONE INDUSTRIES, INC. reassignment KEYSTONE INDUSTRIES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). OCT. 21,1977 Assignors: KS INDUSRTIES, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61DBODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D7/00Hopper cars
    • B61D7/14Adaptations of hopper elements to railways
    • B61D7/16Closure elements for discharge openings
    • B61D7/20Closure elements for discharge openings sliding

Abstract

This disclosure deals with a lock mechanism for a discharge gate of a railway hopper car. The gate includes a frame secured to the lower end of a hopper of the car and extending around the hopper opening, a door plate movably supported by the frame, and means for horizontally moving the door plate between a closed position where it closes the hopper opening and an open position where it uncovers the opening. A lock mechanism is provided for holding the door plate in its closed position. The lock mechanism is both manually engageable and self engageable. In the event the trainmen neglect to manually engage the lock mechanism, shifting of the door plate when the car is moved results in automatic or self engagement of the mechanism.

Claims (4)

1. A lock mechanism for a hopper car discharge gate of the type having a frame and a door plate supported on said frame for horizontal sliding movement between an open position and a closed position, said lock mechanism comprising an elongated latch, and a rod extending transversely through and supporting said latch intermediate its ends for rotation between an engaged position, a generally horizontal tripped position and a generally vertical disengaged position, said latch including a latch portion which when said latch is in said engaged position engages and holds the plate in its closed position and when said latch is in said disengaged position permits movement of the plate, said latch also including a trip portion which extends into the path of movement of the plate when the plate is in its closed position and said latch is in said disengaged position, said trip portion being shorter than said latch portion and disposed to be struck by the plate upon sliding of the plate toward its open position thereby rotating the latch away from said disengaged position to said tripped position in which said latch portion rests on said plate and is in position for subsequent movement into said engaged position upon return of the plate to its closed position.
2. A discharge gate and lock assembly for a hopper car having a discharge opening on the underside thereof, said assembly comprising a frame adapted to be attached to said car at said opening, a plate mounted on said frame for generally horizontal movement between a closed position where it covers said opening and an open position where it uncovers said opening, a latch rod pivotally mounted on said frame and extending generally transversely of the direction of movement of said plate, a handle on each end of said latch rod adjacent a side of said frame, and an elongated latch on said rod adjacent said plate, said latch being rotatable by turning either one of said handles between an engaged position in which one end portion of said latch engages and holds said plate in said closed position and a disengaged position in which the one end portion extends upwardly from the rod and permits opening movement of said plate and the opposite end portion of said latch extends downwardly from the rod in the path of movement of a portion of said plate and movement of said plate toward its open position resulting in said portion of said plate striking said opposite end portion and tripping said latch from said disengaged position toward said engaged position, said latch being positioned on said rod relative to said handles to be pulled by the weight of said handles and said one end portion into said engaged position after the tripping of said latch when said plate is returned to closed position.
3. An assembly as in claim 2, wherein said one end portion of said latch and said two handles are on one side of the axis of said rod when the latch is in said engaged position and said handles are shifted to the other side of said axis when said latch is moved to said disengaged position, whereby gravity tends to hold said latch in whichever engaged or disengaged position it is placed and to move said latch from a tripped position to said engaged position when said plate is moved to the closed position.
4. An assembly as in claim 2, wherein said other end portion of said latch when in said disengaged position extends downwardly into said path of movement of said portion of said plate to be struck and rotated to a tripped position upon movement of said plate toward said open position, said one end portion of said latch resting on the upper surface of said plate when in said tripped position and until said plate moves into said closed position.
US3707126D 1970-07-13 1970-07-13 Expired - Lifetime US3707126B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US5424570A true 1970-07-13 1970-07-13

Publications (2)

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US3707126A true US3707126A (en) 1972-12-26
US3707126B1 US3707126B1 (en) 1983-07-19

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Family Applications (1)

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US3707126D Expired - Lifetime US3707126B1 (en) 1970-07-13 1970-07-13

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US (1) US3707126B1 (en)
CA (1) CA938501A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837294A (en) * 1972-12-04 1974-09-24 Acf Ind Inc Cammed railway hopper gate latching apparatus
US3877392A (en) * 1973-12-28 1975-04-15 Acf Ind Inc Automatic gate locking mechanism
US3893398A (en) * 1974-06-14 1975-07-08 Miner Enterprises Lock means for slide gate of hopper outlet assembly
US3958514A (en) * 1973-12-28 1976-05-25 Acf Industries, Incorporated Automatic hopper gate locking mechanism
US4224879A (en) * 1978-06-12 1980-09-30 Keystone Industries, Inc. Railway hopper car door latch
US4256042A (en) * 1979-10-04 1981-03-17 Miner Enterprises, Inc. Railway hopper car sliding gate lock
US4301741A (en) * 1979-10-22 1981-11-24 Holland Company Hopper car outlet gate assembly with self cleaning gear and rack actuation arrangement
US4450773A (en) * 1981-01-23 1984-05-29 The Youngstown Steel Door Co. Sliding gate for a railroad hopper car
US4534298A (en) * 1983-02-16 1985-08-13 Keystone Industries, Inc. Lock and seal for hopper outlet
US4599948A (en) * 1982-02-08 1986-07-15 Acf Industries, Incorporated Railway hopper gate locking assembly
US5613446A (en) * 1995-05-02 1997-03-25 Trinity Industries, Inc. Railway hopper car gate valve and operating assembly
US5671684A (en) * 1995-07-10 1997-09-30 Keystone Industries, Inc. Railway car outlet gate assembly with automatic lock

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386020A (en) * 1943-05-17 1945-10-02 Frederick K Wendelken Sectional surface drain conduit
US2638060A (en) * 1949-06-29 1953-05-12 Entpr Railway Equipment Co Discharge outlet for railway cars
US2646006A (en) * 1948-12-24 1953-07-21 Entpr Railway Equipment Co Discharge outlet and closure assembly
US2738739A (en) * 1952-10-23 1956-03-20 Entpr Railway Equipment Co Railway car hopper outlet assembly
US3035530A (en) * 1958-05-15 1962-05-22 Pullman Standard Car Mfg Co Lock for enclosed sliding hopper gate
US3387570A (en) * 1966-09-22 1968-06-11 Acf Ind Inc Sequential hopper gate operating mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386020A (en) * 1943-05-17 1945-10-02 Frederick K Wendelken Sectional surface drain conduit
US2646006A (en) * 1948-12-24 1953-07-21 Entpr Railway Equipment Co Discharge outlet and closure assembly
US2638060A (en) * 1949-06-29 1953-05-12 Entpr Railway Equipment Co Discharge outlet for railway cars
US2738739A (en) * 1952-10-23 1956-03-20 Entpr Railway Equipment Co Railway car hopper outlet assembly
US3035530A (en) * 1958-05-15 1962-05-22 Pullman Standard Car Mfg Co Lock for enclosed sliding hopper gate
US3387570A (en) * 1966-09-22 1968-06-11 Acf Ind Inc Sequential hopper gate operating mechanism

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837294A (en) * 1972-12-04 1974-09-24 Acf Ind Inc Cammed railway hopper gate latching apparatus
US3877392A (en) * 1973-12-28 1975-04-15 Acf Ind Inc Automatic gate locking mechanism
US3958514A (en) * 1973-12-28 1976-05-25 Acf Industries, Incorporated Automatic hopper gate locking mechanism
US3893398A (en) * 1974-06-14 1975-07-08 Miner Enterprises Lock means for slide gate of hopper outlet assembly
US4224879A (en) * 1978-06-12 1980-09-30 Keystone Industries, Inc. Railway hopper car door latch
US4256042A (en) * 1979-10-04 1981-03-17 Miner Enterprises, Inc. Railway hopper car sliding gate lock
US4301741A (en) * 1979-10-22 1981-11-24 Holland Company Hopper car outlet gate assembly with self cleaning gear and rack actuation arrangement
US4450773A (en) * 1981-01-23 1984-05-29 The Youngstown Steel Door Co. Sliding gate for a railroad hopper car
US4599948A (en) * 1982-02-08 1986-07-15 Acf Industries, Incorporated Railway hopper gate locking assembly
US4534298A (en) * 1983-02-16 1985-08-13 Keystone Industries, Inc. Lock and seal for hopper outlet
US5613446A (en) * 1995-05-02 1997-03-25 Trinity Industries, Inc. Railway hopper car gate valve and operating assembly
US5671684A (en) * 1995-07-10 1997-09-30 Keystone Industries, Inc. Railway car outlet gate assembly with automatic lock

Also Published As

Publication number Publication date
US3707126B1 (en) 1983-07-19
CA938501A (en) 1973-12-18
CA938501A1 (en)

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Legal Events

Date Code Title Description
B1 Reexamination certificate first reexamination
AS Assignment

Owner name: KEYSTONE INDUSTRIES, INC.

Free format text: CHANGE OF NAME;ASSIGNOR:KS INDUSRTIES, INC.;REEL/FRAME:004183/0070

Effective date: 19830816