US3789742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cylinder latch
Assignee: International Motors LLC
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Filing: 1972-11-16
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Granted: 1974-02-05
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Expires: 1992-11-16
Abstract
Abstract Elongated resilient member comprised of materials having different spring rates. One end thereof is fixed to the cylinder, and the other extends out over the rod such that an arcuated portion is capable of engaging the rod.
Inventors
- 👤 G Hershman
- 👤 W Schwerdtfeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:47
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/261
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A hydraulic cylinder means having a push rod reciprocating therein and a latch means for releasably engaging and securing said push rod when in a retracted position said latch means comprising: first and second elongated resilient means having an abutting parallel relationship, each means having arcuated end means, said arcuated end of said second elongated resilient means having a greater curve than that of said first elongated means and a bend portion contacting said first arcuated end means; a supporting means securing said first and second elongated resilient means to said cylinder means; and a fastening means holding said elongated resilient means together.
Claim 2
Dependent Claim
103 words
A hydraulic cylinder means having a push rod reciprocating therein and a latch means for releasably engaging and securing said push rod when in a retracted position said latch means comprising: first and second elongated resilient means having an abutting parallel relationship, each means having arcuated end means, said arcuated end of said second elongated resilient means having a greater curve than that of said first elongated means and a bend portion contacting said first arcuated end means; a supporting means securing said first and second elongated resilient means to said cylinder means; and a fastening means holding said elongated resilient means together.
Claim 3
Dependent Claim
89 words
The hydraulic cylinder as defined in claim 1 wherein: said first elongated resilient means has a greater spring rate than said second elongated resilient means; and said push rod means carries a catch means for engaging said second arcuated end means only whereby the position of the catch means is such that for unlatching said push rod the combined spring rates of said first and second resilient means must be overcome while for latching said push rod only said spring rate of said second resilient means must be overcome.
Claim 4
Dependent Claim
89 words
A hydraulic cylinder means having a push rod reciprocating therein and a latch means releasably engaging and securing said push rod when in a retracted position said latch means comprising: first and second elongated resilient means having a parallel adjacent relationship and arcuated section means interacting with said push rod, said first elongated means having a higher spring rate than second elongated means; a connecting means securing said first elongated means to said second elongated means; and a mounTing means securing said elongated resilient means to said cylinder means.
Claim 5
Dependent Claim
89 words
A hydraulic cylinder means having a push rod reciprocating therein and a latch means releasably engaging and securing said push rod when in a retracted position said latch means comprising: first and second elongated resilient means having a parallel adjacent relationship and arcuated section means interacting with said push rod, said first elongated means having a higher spring rate than second elongated means; a connecting means securing said first elongated means to said second elongated means; and a mounTing means securing said elongated resilient means to said cylinder means.
Claim 6
Dependent Claim
35 words
The hydraulic cylinder means as defined in claim 3 wherein: said second elongated means is positioned between said first elongated means and said cylinder means, and said arcuated sections are located adjacent said push rod.
Claim 7
Dependent Claim
50 words
The hydraulic cylinder means as defined in claim 3 wherein: said arcuated section means of said first elongated means is less curved than said arcuated section means of said second elongated means, and said second arcuated section means has a bent end portion extending toward said first arcuated section means.
Claim 8
Dependent Claim
25 words
The hydraulic cylinder means as defined in claim 5 wherein: said push rod means includes a catch means which engages said second arcuated section means.
References Cited (Backward Citations)
US3017157A
Cited
US3466008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |