Patent US5340131A successfully refreshed from Google Patents.
US5340131A
Expired / Lapsed
US
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Hydraulic braking system for in-line roller skates
Assignee: ROLL CONTROL Inc
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Filing: 1993-05-20
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Granted: 1994-08-23
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Expires: 2013-05-20
Abstract
Abstract A braking system for a pair of in-line roller skates has a single hand-operated hydraulic actuator which is coupled through a Y coupling to a hydraulic brake assembly on each of the skates for applying braking force simultaneously to opposite sides of a roller on each of the skates. Each hydraulic brake assembly includes a rod extending longitudinally above the rollers to which is connected at least one resilient expander bow, each end of which contacts an engagement caliper. Two engagement calipers are hingedly mounted on the skate housing to apply frictional pressure simultaneously to generally opposite sides of each of the rollers on each of the skates.
Inventors
- 👤 David R. Smathers
- 👤 Jeffrey J. Smathers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/14; A63C17/1409; A63C17/1427; A63C17/04; A63C17/06; A63C2017/1472
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A braking system for a pair of in-line roller skates, each roller skate including a plurality of rollers situated one behind the other along a line of directional travel of the skate, comprising: (a) a single hand-operated hydraulic actuator; (b) a hydraulic conduit system coupling the hydraulic actuator to each of said pair of roller skates, said conduit system having a coupling comprising an input from said actuator and two output lines; and (c) a hydraulic brake assembly located on each of said roller skates for applying braking force simultaneously to generally opposite sides of at least one of said rollers on each of said roller skates.
Claim 2
Dependent Claim
107 words
A braking system for a pair of in-line roller skates, each roller skate including a plurality of rollers situated one behind the other along a line of directional travel of the skate, comprising: (a) a single hand-operated hydraulic actuator; (b) a hydraulic conduit system coupling the hydraulic actuator to each of said pair of roller skates, said conduit system having a coupling comprising an input from said actuator and two output lines; and (c) a hydraulic brake assembly located on each of said roller skates for applying braking force simultaneously to generally opposite sides of at least one of said rollers on each of said roller skates.
Claim 3
Dependent Claim
24 words
The braking system of claim 1 wherein said hand-operated hydraulic actuator includes a hand-held-body portion and a plunger portion coupled to a hydraulic cylinder.
Claim 4
Dependent Claim
27 words
The braking system of claim 1 wherein the hydraulic brake assembly includes a hydraulic cylinder and a piston, mounted at the rear of each of said skates.
Claim 5
Dependent Claim
28 words
The braking system of claim 3 wherein said piston is coupled by a mechanical link to a pair of engagement calipers for applying frictional pressure to a roller.
Claim 6
Dependent Claim
33 words
The braking system of claim 4 further including at least one pair of opposing brake pads mounted on said pair of engagement calipers for applying frictional pressure to opposite sidewalls of a roller.
Claim 7
Dependent Claim
32 words
The braking system of claim 4 including a housing wherein said pair of engagement calipers are pivotally mounted on said housing to apply frictional pressure to a roller with a pincer action.
Claim 8
Dependent Claim
81 words
The braking system of claim 4 wherein said mechanical link comprises: (a) a rod having an end and extending longitudinally above said rollers, said end of said rod being connected to said piston; and (b) a resilient expander member having spaced apart ends and being mounted on said rod in spaced relation from said end of said rod, each said end of said resilient expander member contacting one of said engagement calipers for simultaneously pushing against said pair of engagement calipers.
Claim 9
Dependent Claim
20 words
The braking system of claim 1 wherein said hand-operated hydraulic actuator includes a wire link coupled to a hydraulic cylinder.
Claim 10
Dependent Claim
25 words
The braking system of claim 1 wherein the hand-operated hydraulic actuator includes a pistol grip portion and a lever portion coupled to a hydraulic cylinder.
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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |