Patent US3617100A successfully refreshed from Google Patents.
US3617100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-theft brake monitoring device for vehicles
Assignee: Individual
•
Filing: 1970-05-18
•
Granted: 1971-11-02
•
Expires: 1990-05-18
Abstract
Abstract An antitheft brake monitoring device for vehicles which is mounted in the instrument panel of a vehicle and is connected into the brake fluid line that extends from the master cylinder, or power brake booster, to the brake wheel cylinders. The device can be controlled by a combination locking device for holding an applied brake action on all of the vehicle wheels indefinitely during the absence of an authorized vehicle operator. The device can automatically compensate for volume contraction of the fluid in the brake lines due to temperature change or loss of fluid.
Inventors
- 👤 John G Wrigley
- 👤 Dennis Portch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:00
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T17/00; B60T17/08; B60T17/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87257
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
534 words
In combination: a. a casing having a first bore therein with a closed end; b. a valve body slidably mounted in said bore; c. a first and a second fluid conveying pipe communicating with the bore at the closed end thereof so that fluid can flow from the first pipe through the space in the bore between said valve body and the closed end before entering the second pipe when said valve body is in inoperative position; d. said casing having a second bore of a smaller diameter than said first bore and communicating with the first bore, the other end of the second bore being closed; a shoulder is formed in the interior of the casing at the juncture where the two bores meet; said valve body having one end facing the closed end of said first bore and having its opposite end facing the closed end of said second bore; e. said valve body having a first fluid passage therein and a Check valve mounted in said passage for permitting fluid to flow in one direction and to enter said second bore when said valve body is in operative position; f. a first means disposed between said first pipe and said first fluid passage in said valve body for placing the first pipe in communication with the space in said first bore formed between said valve body and said closed end when said valve body is in inoperative position; said means closing off communication with said space and directing the fluid into the valve body first fluid passage when said valve body is in operative position, whereby the fluid will enter said second bore; g. said valve body having a second fluid passage therein and a check valve mounted in said second passage for permitting fluid to flow in only one direction from said second bore when said valve body is in operative position; h. a second means disposed between said second pipe and said second fluid passage in said valve body for placing the second pipe in communication with said second passage when said valve body is in operative position, said second means closing off communication with said space in said first bore formed between said valve body and said closed end when said valve body is in operative position, and opening communication between said second pipe and said space when said valve body is in inoperative position; and i. a third means for moving said valve body from operative to inoperative position for causing the end of the valve body disposed nearest to said second bore, to contact with said shoulder that lies at the juncture of said first bore with said second bore; and liquid sealing means positioned between said valve body and shoulder and contacted by both when said valve body is in inoperative position, said last-named sealing means also closing off any communication between said first and second passages in said valve body with said second bore, the pressure of fluid in the space provided in said first bore and bounded by said valve body and said closed cylinder end, acting against said valve body for aiding in keeping it pressed against said last-named liquid sealing means.
Claim 2
Dependent Claim
534 words
In combination: a. a casing having a first bore therein with a closed end; b. a valve body slidably mounted in said bore; c. a first and a second fluid conveying pipe communicating with the bore at the closed end thereof so that fluid can flow from the first pipe through the space in the bore between said valve body and the closed end before entering the second pipe when said valve body is in inoperative position; d. said casing having a second bore of a smaller diameter than said first bore and communicating with the first bore, the other end of the second bore being closed; a shoulder is formed in the interior of the casing at the juncture where the two bores meet; said valve body having one end facing the closed end of said first bore and having its opposite end facing the closed end of said second bore; e. said valve body having a first fluid passage therein and a Check valve mounted in said passage for permitting fluid to flow in one direction and to enter said second bore when said valve body is in operative position; f. a first means disposed between said first pipe and said first fluid passage in said valve body for placing the first pipe in communication with the space in said first bore formed between said valve body and said closed end when said valve body is in inoperative position; said means closing off communication with said space and directing the fluid into the valve body first fluid passage when said valve body is in operative position, whereby the fluid will enter said second bore; g. said valve body having a second fluid passage therein and a check valve mounted in said second passage for permitting fluid to flow in only one direction from said second bore when said valve body is in operative position; h. a second means disposed between said second pipe and said second fluid passage in said valve body for placing the second pipe in communication with said second passage when said valve body is in operative position, said second means closing off communication with said space in said first bore formed between said valve body and said closed end when said valve body is in operative position, and opening communication between said second pipe and said space when said valve body is in inoperative position; and i. a third means for moving said valve body from operative to inoperative position for causing the end of the valve body disposed nearest to said second bore, to contact with said shoulder that lies at the juncture of said first bore with said second bore; and liquid sealing means positioned between said valve body and shoulder and contacted by both when said valve body is in inoperative position, said last-named sealing means also closing off any communication between said first and second passages in said valve body with said second bore, the pressure of fluid in the space provided in said first bore and bounded by said valve body and said closed cylinder end, acting against said valve body for aiding in keeping it pressed against said last-named liquid sealing means.
Claim 3
Dependent Claim
486 words
In combination a. a casing having a first bore therein with a closed end; b. a valve body slidably mounted in said bore; c. a first and second fluid conveying pipe communicating with the bore at the closed end thereof so that fluid can flow from the first pipe through the space in the bore between said valve body and the closed end before entering the second pipe when said valve body is in inoperative position; d. said casing having a second bore of a smaller diameter than said first bore and communicating with the first bore, the other end of the second bore being closed; a shoulder is formed in the interior of the casing at the juncture where the two bores meet; said valve body having one end facing the closed end of said first bore and having its opposite end facing the closed end of said second bore; e. said valve body having a first fluid passage therein and a check valve mounted in said passage for permitting fluid to flow in one direction and to enter said second bore when said valve body is in operative position; f. a first means disposed between said first pipe and said first fluid passage in said valve body for placing the first pipe in communication with the space in said first bore formed between said valve body and said closed end when said valve body is in inoperative position said means closing off communication with said space and directing the fluid into the valve body first fluid passage when said valve body is in operative position, whereby the fluid will enter said second bore; g. said valve body having a second fluid passage therein and a check valve mounted in said second passage for permitting fluid to flow in only one direction from said second bore when said valve body is in operative position; h. a second means disposed between said second pipe and said second fluid passage in said valve body for placing the second pipe in communication with said second passage when said valve body is in operative position, said second means closing off communication with said space in said first bore formed between said valve body and said closed end when said valve body is in operative position, and opening communication between said second pipe and said space when said valve body is in inoperative position; and i. a third means for moving said valve body from inoperative to operative position for causing first and second means to prevent any return flow of fluid from said second pipe, back into said space in said first bore formed between said valve body and the closed end of the casing so that the fluid cannot enter said first pipe in any return flow of fluid, said check valve in said second passage preventing any return flow of fluid therein back into said second bore.
Claim 4
Dependent Claim
486 words
In combination a. a casing having a first bore therein with a closed end; b. a valve body slidably mounted in said bore; c. a first and second fluid conveying pipe communicating with the bore at the closed end thereof so that fluid can flow from the first pipe through the space in the bore between said valve body and the closed end before entering the second pipe when said valve body is in inoperative position; d. said casing having a second bore of a smaller diameter than said first bore and communicating with the first bore, the other end of the second bore being closed; a shoulder is formed in the interior of the casing at the juncture where the two bores meet; said valve body having one end facing the closed end of said first bore and having its opposite end facing the closed end of said second bore; e. said valve body having a first fluid passage therein and a check valve mounted in said passage for permitting fluid to flow in one direction and to enter said second bore when said valve body is in operative position; f. a first means disposed between said first pipe and said first fluid passage in said valve body for placing the first pipe in communication with the space in said first bore formed between said valve body and said closed end when said valve body is in inoperative position said means closing off communication with said space and directing the fluid into the valve body first fluid passage when said valve body is in operative position, whereby the fluid will enter said second bore; g. said valve body having a second fluid passage therein and a check valve mounted in said second passage for permitting fluid to flow in only one direction from said second bore when said valve body is in operative position; h. a second means disposed between said second pipe and said second fluid passage in said valve body for placing the second pipe in communication with said second passage when said valve body is in operative position, said second means closing off communication with said space in said first bore formed between said valve body and said closed end when said valve body is in operative position, and opening communication between said second pipe and said space when said valve body is in inoperative position; and i. a third means for moving said valve body from inoperative to operative position for causing first and second means to prevent any return flow of fluid from said second pipe, back into said space in said first bore formed between said valve body and the closed end of the casing so that the fluid cannot enter said first pipe in any return flow of fluid, said check valve in said second passage preventing any return flow of fluid therein back into said second bore.
Claim 5
Dependent Claim
164 words
The combination as set forth in claim 2; and in which a. a said first means includes a first tube communicating with said first pipe for receiving fluid therefrom and having a first sealing ring encircling said tube and contacting the closed end of said casing; and b. said second means includes a second tube communicating with said second pipe and being adapted to receive fluid from the space in said first bore formed between said valve body and the closed end of said casing, said second tube having a second sealing ring encircling it and contacting with the closed end of said casing; c. whereby the fluid in said second bore will exert a force against the adjacent end of said valve body for aiding in forcing it against said first and second sealing rings for closing off any fluid flow from either of said pipes into the space in said first bore formed between said valve body and the casing closed end.
Claim 6
Dependent Claim
41 words
The combination as set forth in claim 2: and in which a. said third means for moving said valve body includes a combination lock which prevents any actuation of said third means until the correct combination for the lock is set.
Claim 7
Dependent Claim
70 words
The combination as set forth in claim 2: and in which a. a spring-biased piston is slidably mounted in said second bore for exerting a yielding force on the fluid in the second bore for forcing it through said second passage in said valve body when the latter is in inoperative position for feeding fluid into said second pipe for compensating any possible loss of fluid from the second pipe.
Claim 8
Dependent Claim
36 words
The combination as set forth in claim 5: and in which a. said second pipe communicates with at least one brake cylinder for a vehicle wheel; and b. a master cylinder communicates with said first pipe.
Claim 9
Dependent Claim
122 words
The combination as set forth in claim 2: and in which a. said third means for moving said valve body includes a plurality of longitudinally extending rods connected to said valve body at one end, these rods being slidably carried by said casing; and b. a drive nut mounted on a threaded portion which is stationary with respect to said casing and having an annular outwardly extending flange that is slidably received in annular grooves provided in said rods; c. whereby a rotation of said drive nut in one direction will move said rods for moving said valve body from inoperative to operative position and a reverse rotation of said drive nut will move said valve body from operative to inoperative position.
Claim 10
Dependent Claim
140 words
The combination as set forth in claim 7: and in which a. said drive nut has at least one opening therein spaced away from the nut axis; b. a member rotatably mounted in said casing and carrying a spring-biased drive pin that can be brought into registration with the opening in said drive nut when said member is rotated into a predetermined angular position; and c. a combination lock controlled lock pin that is operatively connected to said drive pin so that when the correct combination is set, said lock pin may be actuated for moving said drive pin into the registering opening in Said drive nut; d. whereby the drive nut is connected to said rotatable member as a unit and a rotation of said member will move said valve body from inoperative to operative position and vice versa.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |