US3797323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time variable valve apparatus
Assignee: Individual
•
Filing: 1972-09-05
•
Granted: 1974-03-19
•
Expires: 1992-09-05
Abstract
Abstract A time variable apparatus for controlling a valve. A first and second cam are mounted to a shaft rotatably driven adjacent to a piston which extends outwardly from a frame adjacent to the cams. One cam is operable to force the piston head to a first position whereat a spring biased latch secures the piston in the first position. The second cam is operable to release the latch thereby allowing the piston to move to a second position. The second cam is slotted and receives a fastener extending outwardly from the first cam. The fastener may be loosened so as to adjust the relative rotational positions of the second cam with respect to the first cam thereby allowing for adjustment and control of the duration during which the piston is in either position.
Inventors
- 👤 E Brane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:07
CPC Classifications
F; F16; F16H; F16H25/00; F16H53/00; F16H53/02; F16H53/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A time variable valve apparatus comprising: a frame having a first cylinder; a first piston slidably mounted in said cylinder and having a protruding head, said piston being movable from a first position to a second position; a rotatably driven shaft mounted on said Frame; a first member mounted on said shaft, said first member having a first cam contacting said head and moving said piston from said first position to said second position as said shaft rotates; latch means movably mounted on said frame operable to hold said piston in said second position; and, a second member mounted on said shaft, said second member having a second cam contacting and releasing said latch means as said shaft rotates allowing said piston to move from said second position to said first position, said second cam having a normally fixed position with respect to said first cam and being adjustably movable with respect to said first cam controlling the time period between said first cam contacting said head to said second cam contacting said latch means.
Claim 2
Dependent Claim
175 words
A time variable valve apparatus comprising: a frame having a first cylinder; a first piston slidably mounted in said cylinder and having a protruding head, said piston being movable from a first position to a second position; a rotatably driven shaft mounted on said Frame; a first member mounted on said shaft, said first member having a first cam contacting said head and moving said piston from said first position to said second position as said shaft rotates; latch means movably mounted on said frame operable to hold said piston in said second position; and, a second member mounted on said shaft, said second member having a second cam contacting and releasing said latch means as said shaft rotates allowing said piston to move from said second position to said first position, said second cam having a normally fixed position with respect to said first cam and being adjustably movable with respect to said first cam controlling the time period between said first cam contacting said head to said second cam contacting said latch means.
Claim 3
Dependent Claim
46 words
The apparatus of claim 1 wherein: said first and second members are adjacent and interconnected by a fastener mounted to one of said members which extends through a slot in the other of said members, said fastener prevents relative motion between said members and is releasable.
Claim 4
Dependent Claim
74 words
The apparatus of claim 2 wherein: said latch means includes a lever pivotally mounted to said frame and spring biased against said head, said lever has a stop positioned against said head and in said second position preventing movement of said piston to said first position, said lever has a portion contactable by said second cam to move said stop away from said head and allow said piston to move to said first position.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 and further comprising: a spring mounted between said head and said frame urging said piston to said first position.
Claim 6
Dependent Claim
55 words
The apparatus of claim 4 wherein: said head includes a flange and said lever includes a recess complementary receiving said flange when said piston is in said second position, said stop surface is positioned in said recess and further comprising: indicating means on said first and second members operable to indicate relative rotational positions therebetween.
Claim 7
Dependent Claim
144 words
The apparatus of claim 1 wherein: said frame has a second cylinder and further comprising: a second piston slidably mounted in said second cylinder with a second protruding head, said second piston movable from a third position to a fourth position; a third member mounted on said shaft and having a third cam contacting said second head and moving said second piston from said third position to said fourth position as said shaft rotates; and, a fourth member mounted on said shaft adjacent to and connected to said third member and having a fourth cam contactable with said second head, said fourth cam being movable to a position adjacent said third cam to contact said second head and keep said second piston in said fourth position as said shaft rotates and said third cam and said fourth cam contacts said head in sequential fashion.
Claim 8
Dependent Claim
30 words
The apparatus of claim 1 and further comprising: a spring mounted on said shaft and releasably urging said first and second members together so said members will rotate in unison.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |