Patent US3921835A successfully refreshed from Google Patents.
US3921835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Releasable lock means for boom
Assignee: Case LLC
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Filing: 1974-05-28
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Granted: 1975-11-25
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Expires: 1994-05-28
Abstract
Abstract A releasable lock means for holding a boom in a storage position on a support is disclosed herein. The releasable lock means consists of a first member or pin that is carried by the support and a second member or lock ring that is pivoted on the boom and has an opening for receiving the pin. The second member is biased to a first position and engages with the pin as the boom is moved to its storage position to overcome the biasing means. When the opening in the second member and the pin are axially aligned, the biasing means returns the second member to the first position to produce an interlock between the two members. The device also incorporates release means for pivoting the second member and separating the members.
Inventors
- 👤 Donald C Baker
- 👤 Lloyd A Brewer
- 👤 Herman J Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/388
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
238 words
In an earth-working implement having a boom pivoted about a horizontal pivot axis on a support with an earth-working unit pivoted on the free end of said boom, said support being pivoted about a vertical pivot axis on a base with said vertical pivot axis being defined by at least one pin fixed to said support and rotatable on said base, and releasable lock means between said boom and said support, said releasable lock means including a first member on one of said support and said boom, a second member on the other of said support and boom, said second member including a ring structure pivoted about a horizontal pivot axis on the other of said support and boom and including an opening within its confines for receiving said first member, said first member being an upper free end portion of said at least one pin, biasing means cooperating with said second member for normally maintaining said second member in a first position and accommodating movement from said first position, said members being positioned so that pivotal movement of said boom to a storage position will produce engagement between said members and cause movement of said second member from said first position, said biasing means returning said second member to said first position when said first member is aligned with said opening, and release means for moving said second member from said first position and separate said members.
Claim 2
Dependent Claim
238 words
In an earth-working implement having a boom pivoted about a horizontal pivot axis on a support with an earth-working unit pivoted on the free end of said boom, said support being pivoted about a vertical pivot axis on a base with said vertical pivot axis being defined by at least one pin fixed to said support and rotatable on said base, and releasable lock means between said boom and said support, said releasable lock means including a first member on one of said support and said boom, a second member on the other of said support and boom, said second member including a ring structure pivoted about a horizontal pivot axis on the other of said support and boom and including an opening within its confines for receiving said first member, said first member being an upper free end portion of said at least one pin, biasing means cooperating with said second member for normally maintaining said second member in a first position and accommodating movement from said first position, said members being positioned so that pivotal movement of said boom to a storage position will produce engagement between said members and cause movement of said second member from said first position, said biasing means returning said second member to said first position when said first member is aligned with said opening, and release means for moving said second member from said first position and separate said members.
Claim 3
Dependent Claim
36 words
An earth-working implement as defined in claim 1, in which said biasing means is an elastomeric member between said boom and said second member and in which said boom has stop means defining said first position.
Claim 4
Dependent Claim
70 words
An earth-working implement as defined in claim 1, in which said release means includes a rod rotatably supported about a pivot axis adjacent said support, said rod having a laterally offset portion cooperating with said second member so that rotation of said rod from a first position will move said second member from said first position to separate said members, and means normally maintaining said rod in said first position.
Claim 5
Dependent Claim
95 words
An earth-working implement as defined in claim 3, in which said means normally maintaining said rod in said first position includes a fixed camming surface adjacent said rod, a pin carried by said rod, spring means between said rod and said camming surface for maintaining engagement between said pin and said camming surface so that rotation of said rod will move said pin along said camming surface to axially shift said rod and compress said spring means, and release of said rod will cause said spring means to return said rod to said first position.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |