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
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
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)

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
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

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
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