US3707126B1 - - Google Patents

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Publication number
US3707126B1
US3707126B1 US3707126DA US3707126B1 US 3707126 B1 US3707126 B1 US 3707126B1 US 3707126D A US3707126D A US 3707126DA US 3707126 B1 US3707126 B1 US 3707126B1
Authority
US
United States
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
Application number
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
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 filed Critical
Publication of US3707126A publication Critical patent/US3707126A/en
Application granted granted Critical
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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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D7/00—Hopper cars
    • B61D7/14—Adaptations of hopper elements to railways
    • B61D7/16—Closure elements for discharge openings
    • B61D7/20—Closure elements for discharge openings sliding

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
US54245A 1970-07-13 1970-07-13 Hopper gate latching mechanism Expired - Lifetime US3707126A (en)

Applications Claiming Priority (1)

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

Publications (2)

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

Family

ID=21989728

Family Applications (1)

Application Number Title Priority Date Filing Date
US54245A Expired - Lifetime US3707126A (en) 1970-07-13 1970-07-13 Hopper gate latching mechanism

Country Status (2)

Country Link
US (1) US3707126A (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

Family Cites Families (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
US3707126A (en) 1972-12-26
CA938501A (en) 1973-12-18

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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